ЛАТЕКС И ФРИКЦИОННЫЙ МАТЕРИАЛ

Изобретение относится к латексу содержащего карбоксильные группы нитрильного каучука, содержащего α,β-этиленненасыщенное нитрильное мономерное звено в количестве от 8 вес. % до 60 вес. % и с йодным числом 120 или менее, в котором общее содержание калия и натрия в латексе составляет от 2300 до 10000 вес. м.д. по отношению ко всему латексу, а также к латексной композиции для фрикционного материала, содержащей указанный латекс и термоотверждающуюся смолу. 3 н. и 3 з.п. ф-лы, 1 табл.

Zusammensetzung aus Mischungen von Latices

A carboxylated acrylonitrile butadiene latex seamless bladder and a process for manufacturing thereof

A soft seamless acrylonitrile bladder having excellent air permeability combined with good bounce characteristics for inflatable balls obtained by latex dipping process. The said process involves dipping hot moulds in a coagulant bath of calcium nitrate and water and later dipping the dried, coagulant coated formers in a compounded latex bath of carboxylated acrylonitrile butadiene latex, the dip being single or multiple depending upon the desired wall thickness. The said latex dipping process allows low manufacturing cost, high productivity and low rejection rate bladders having uniform weight varying from 500 mg/inch2 to 1.5 g/inch2, modulus varying from 17 to 20 Kg/Cm2, tensile strength of 150-180 Kg/Cm2 and elongation at break 650-750%..

PROCESS FOR PREPARING A RUBBER-ASPHALT COMPOSITION

Coated Fabrics

... 1,178,679. Laminates. DEERING MILLIKEN Ltd. 14 Dec., 1967 [14 Dec., 1966], No. 56026/66. Heading B5N. [Also in Divisions C3 and D1] A laminate is prepared from several layers of woven nylon fabric which has been impregnated with an aqueous composition comprising an uncondensed or partially condensed mixture of resorcinol, formaldehyde and an activator therefor, a carboxylated butadiene-acrylonitrile rubber, and an externally plasticized polyvinylchloride, e.g. with dioctyl phthalate and then coated with a paste composition consisting of P.V.C., plasticizers, e.g. trixylyl phosphate and dialphanyl phthalate, antistatic agent, pigment, liquid nitrile rubber, and lead sulphate or white lead. The outer surfaces are then coated with polyvinyl chloride sheet and then vulcanized and fused in a press. The product is suitable for conveyer belting.

Improvements in or relating to plasticized vinyl resin compositions and to methods of preparing the same

Polymers or copolymers of vinyl chloride or vinylidene chloride are plasticized by a copolymerization product of 30 to 80 parts of a butadiene-1,3 hydrocarbon with 20 to 70 parts of an acrylic nitrile, the product having a molecular weight below 85,000 and a Mooney viscosity below 35 as determined by means of the Mooney Viscosimeter using the 1.5 inch rotor after four minutes at 212 DEG F. The vinyl chloride or vinylidene chloride may be copolymerized with each other or with minor amounts of other compounds containing a single double bond, e.g. vinyl acetate, propionate and butyrate, methyl acrylate, methacrylate and ethacrylate, ethyl acrylate, diethyl maleate and monochlormaleate, styrene and ethylene. The plasticizers may be prepared from butadiene-1,3 or isoprene with acrylonitrile, chloroacrylonitrile, methacrylonitrile or ethacrylonitrile and are soft and non-rubbery. Small proportions of a third component, e.g. myrcene, methyl, methacrylate and divinyl benzene, may be added. They ...

Treatment of a rubber/resin latex blend

A blend of butadiene/acrylonitrile rubber latex with vinyl chloride resin latex is made alkaline to a pH of 9-12 with potassium hydroxide and heat treated at 250 DEG -350 DEG F. in a pressure vessel with agitation till the resinous particles coalesce with the rubbery particles but the latex does not coagulate. After heat treatment the latex is made alkaline again with potassium hydroxide and may be stored or cast as a film and dried in air at 70 DEG C. The vinyl chloride resin may be a homopolymer or a copolymer with up to 20% of any copolymerizable monomer such as diethyl maleate. A heat stabilizer for polyvinyl chloride such as dibutyl tin dilaurate may be added. The product may be used to back carpets (see Group VIII).

NITRILE COPOLYMER INDIA RUBBER COMPOSITION AND NITRILE COPOLYMER LATEX COMPOSITION

LATEX BINDER COMPOSITIONS FOR COMPOSITE BOARD

LATEX BINDER COMPOSITIONS FOR COMPOSITE BOARD

PACKAGING MATERIAL

ADHESIVE COMPOSITION AND METHOD FOR ADHERING TEXTILES TO EPDM RUBBER

An improved adhesive composition and method for adhering textile reinforcing elements to rubber, particularly ethylene-propylene-diene rubber, in the manufacture of rubber articles such as power transmission belts, wherein the adhesive composition comprises a latex of a hydrogenated styrene-butadiene rubber, a carboxylated hydrogenated styrene-butadiene rubber, a hydrogenated nitrile-butadiene rubber, a carboxylated hydrogenated nitrile-butadiene rubber, a chlorosulfonated polyethylene or blends thereof; an aqueous solution of a half-ester of maleinized liquid poybutadiene; and, optionally, up to about 15% by weight carbon black in an aqueous solution.

ADHESIVE COMPOSITION AND METHOD FOR ADHERING TEXTILES TO EPDM RUBBER

An improved adhesive composition and method for adhering textile reinforcing elements to rubber, particularly ethylene-propylene-diene rubber, in the manufacture of rubber articles such as power transmission belts, wherein the adhesive composition comprises a latex of a hydrogenated styrene-butadiene rubber, a carboxylated hydrogenated styrene-butadiene rubber, a hydrogenated nitrile-butadiene rubber, a carboxylated hydrogenated nitrile-butadiene rubber, a chlorosulfonated polyethylene or blends thereof; an aqueous solution of a half-ester of maleinized liquid poybutadiene; and, optionally, up to about 15% by weight carbon black in an aqueous solution.

LATEX BINDER COMPOSITIONS FOR COMPOSITE BOARD

Polymeric latexes with a relatively high Tg and particle sizes greater than 1400 Angstroms can be used in whole or in part as a binder to produce strong composite board that will substantially resist sagging under conditions of high temperature and humidity. 38,828-F ...

SURFACE-MODIFIED FILLER

Novel surface-modified magnesium hydroxides and aluminium hydroxides are disclosed which are employed as flame-inhibiting fillers in thermoplastic polyolefins.

SOFT NITRILE RUBBER FORMULATION

Nitrile rubber compositions, articles of manufacture made therefrom, and methods of making them, are disclosed. The nitrile rubber compositions of the invention are substantially free of zinc oxide, and have good strength and chemical resistance while being softer than many conventional nitrile rubbers. The invention provides articles of manufacture, including gloves, which are soft, yet strong, and can be economically manufactured.

Verfahren zur Herstellung eines biegsamen Films und nach diesem Verfahren erhaltener Film.

Verfahren zum Kleben von Kupferfolien Verfahren zum Kleben von Kupferfolien

Verfahren zum Veredeln von Textilmaterialien

Verfahren zur Herstellung von elastischen Formkörpern

Verfahren zur Herstellung von vernetzten Polymerisaten

TIRE TREAD

MEDICAL POLYMERIC CLAY

TREAD OF TIRE

Pneumatique à adhérence améliorée sur sol mouillé, dont la bande de roulement comporte une composition de caoutchouc comprenant au moins (parties en poids pour cent parties d'élastomère) : 20 à 100 pce d'un premier élastomère diénique portant au moins une fonction SiOR, R étant l'hydrogène ou un radical hydrocarboné ; - optionnellement 0 à 80 pce d'un deuxième élastomère diénique ; - 100 à 160 pce d'une charge inorganique renforçante ; - un système plastifiant comprenant : - selon un taux A compris entre 5 et 60 pce, une résine hydrocarbonée présentant une Tg supérieure à 20°C ; - selon un taux B compris entre 5 et 60 pce, un agent plastifiant liquide ; étant entendu que le taux total A+B est supérieur à 45 pce.

PROCEEDED OF PREPARATION Of a COMPOSITION OF RUBBER AND ASPHALT

SULPHUR-VALCANIZABLE ELASTOMER MIXTURE AND OXIDATION-RESISTANT VULCANIZATES THEREOF

TREAD OF TIRE

HYDROGENATION OF NITRILE BUTADIENE RUBBER LATEX

ADHESIVE COMPOSITION AND METHOD FOR ADHERING TEXTILES TO EPDM RUBBER

An improved adhesive composition and method for adhering textile reinforcing elements to rubber; particularly ethylene-propylene-diene rubber in the manufacture of rubber articles such as power transmission belts, wherein said composition comprises a latex of a hydrogenated styrene-butadiene rubber, a hydrogenated nitrile-butadiene rubber, a carboxylated hydrogenated nitrile-butadiene rubber, an ethylene-propylene rubber, a chlorosulfonated polyethylene or blends thereof; an aqueous solution of a maleinized liquid polybutadiene; and, optionally, up to about 10 % by weight carbon black dispersion.

LATEX FOR DIP MOLDING, COMPOSITION FOR DIP MOLDING, PREPARATION METHOD OF DIP MOLDED PRODUCT, AND DIP MOLDED PRODUCT PREPARED THEREBY

Provided are a latex for dip molding, a composition for dip molding, a preparation method of a dip molded product, and a dip molded product prepared thereby. The latex for dip molding includes a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, and an ethylenically unsaturated acid monomer, wherein the latex further includes sodium methallyl sulfonate as a copolymerizable ionic monomer. A dip molded product having excellent tensile strength, elongation, and touch may be obtained from a composition using the latex according to the present invention, and the generation of limitations, such as non-uniformity of physical properties and difficulties in product management, may be prevented.

Elastomeric film products with improved chemical resistance

POLYMER BLENDS OF NITRILE BUTADIENE RUBBER AND POLYCHLOROPRENE

ЛАТЕКС ДЛЯ СВЯЗЫВАНИЯ ВОЛОКНИСТЫХ СТРУКТУР

Изобретение относится к полимерному латексам, используемым в качестве связующих при создании волокнистых структур. Предложен полимерный латекс для получения связующего, полученный в результате эмульсионной полимеризации в водной среде смеси из этиленненасыщенных мономеров, содержащей: (а) от более, чем 60 до 75% масс. по меньшей мере одного алифатического сопряженного диена, (b) от 10 до 30% масс. по меньшей мере одного винилароматического соединения; и (с) от 0,5 до 5% масс. по меньшей мере одного этиленненасыщенного силана, содержащего по меньшей мере одну гидролизуемую группу, связанную с кремнием; (d) от 0,1 до 8% масс., по меньшей мере одной этиленненасыщенной кислоты; и (е) от 0 до 20% масс., по меньшей мере одного дополнительного этиленненасыщенного соединения, отличного от любых из соединений от (а) до (d), при этом уровни массового процентного содержания получаются при расчете на совокупное количество мономеров и в сумме составляют 100% масс. Предложены также содержащее указанный ...

КОМПОЗИЦИЯ НА ОСНОВЕ НИТРИЛЬНОГО КАУЧУКА, ЛАТЕКСНАЯ КОМПОЗИЦИЯ ВЫСОКОНАСЫЩЕННОГО НИТРИЛЬНОГО КАУЧУКА И СШИТЫЙ КАУЧУК

Изобретение относится к композиции на основе нитрильного каучука. Композиция на основе нитрильного каучука включает высоконасыщенный нитрильный каучук, содержащий α,β-этиленненасыщенные нитрильные мономерные звенья в количестве от 8 до 60 вес.%, и с йодным числом 120 или менее, и алкилированное фенольное соединение, в котором процентное содержание алкилированного фенольного соединения относительно суммы высоконасыщенного нитрильного каучука и алкилированного фенольного соединения составляет от 0,01 до 1 вес.%, и разность (η2-η1) между показателем пластичности η2 после выдерживания при 70°С в течение 7 дней в форме водной дисперсии при диспергировании в воде и показателем пластичности η1 до выдерживания составляет 12 или менее. Изобретение позволяет улучшить технологические свойства, а также значительно улучшить напряжение при растяжении вулканизатов из композиции. 4 н. и 5 з.п. ф-лы, 2 табл.

БУТАДИЕН-НИТРИЛЬНЫЙ ЛАТЕКС, ЛАТЕКСНАЯ КОМПОЗИЦИЯ ДЛЯ ПОГРУЖНОГО МАКАНИЯ, МАКАНОЕ ИЗДЕЛИЕ

Настоящее изобретение относится к латексу для изготовления изделий методом погружного макания, в частности для получения латексных перчаток промышленного и медицинского назначения, а также к композиции для погружного макания на основе бутадиен-нитрильного латекса, маканому изделию и перчатке, приготовленным на основе композиции латекса по изобретению. Латекс содержит структурные звенья, образованные из, по меньшей мере, одного мономера, который является сопряженным диеном, по меньшей мере, одного мономера, который является нитрилом акриловой кислоты и, по меньшей мере, одного мономера, который является ненасыщенной карбоновой кислотой. Указанный латекс характеризуется значением ионного индекса (I) в диапазоне от 0,5 до 5,5 мас.%⋅моль/г, определенного в соответствии с формулой: (I), где c(Na+), c(K+) и c(P5+) - концентрация ионов натрия, калия и фосфора в латексе, указанная в мас.% в расчете на массу сухой латексной пленки, причем концентрация ионов фосфора c(P5+) составляет не более 0,20 ...

СТОЙКИ К ГИДРОЛИЗУ СМЕСИ ПОЛИАМИД-ЭЛАСТОМЕР, ФОРМОВАННЫЕ ИЗДЕЛИЯ, ПОЛУЧЕННЫЕ ИЗ НИХ, И ИХ ПРИМЕНЕНИЕ

... 1. Смесь полиамид-эластомер, содержащая: ! a) от 30 до 95 мас.%, по меньшей мере, одного частично кристаллического полиамида, характеризующегося вязкостью раствора, большей или равной 1,75 (согласно измерению для раствора в м-крезоле, 0,5 мас.%, 20°С), ! b) от 5 до 50 мас.%, по меньшей мере, одного эластомера, полученного эмульсионной полимеризацией с последующей распылительной сушкой латекса, полученного в ходе эмульсионной полимеризации, ! c) при необходимости от 0 до 20 мас.% одного или нескольких полиамидов, характеризующихся вязкостью раствора, меньшей, чем 1,75 (согласно измерению для раствора в м-крезоле, 0,5 мас.%, 20°С), ! причем вышеупомянутые указания в мас.% относятся к совокупному количеству компонентов от (а) до (с), ! и, при расчете на 100 мас.ч. компонентов от (а) до (с), от 0 до 100 мас.ч. одной или нескольких добавок. ! 2. Смесь полиамид-эластомер по п.1, отличающаяся тем, что эластомер b) получен в результате проведения эмульсионной полимеризации из ! b1) ≥55 мас.%, по ...

ВОДНЫЕ СУСПЕНЗИИ СОДЕРЖАЩИХ КАРБОКСИЛЬНЫЕ ГРУППЫ ПОЛНОСТЬЮ ИЛИ ЧАСТИЧНО ГИДРИРОВАННЫХ НИТРИЛЬНЫХ КАУЧУКОВ, СПОСОБ ИХ ПОЛУЧЕНИЯ И ИХ ПРИМЕНЕНИЕ

... 1. Водная суспензия содержащего карбоксильные группы, полностью или частично гидрированного нитрильного каучука, который имеет содержание эмульгатора максимально 1 вес. ч. в расчете на 100 вес. ч. содержащего карбоксильные группы полностью или частично гидрированного нитрильного каучука, при этом содержащий карбоксильные группы полностью или частично гидрированный нитрильный каучук имеет в суспензии средний диаметр частиц в области от 0,01 до 0,9 мкм, предпочтительно от 0,05 до 0,8 мкм и особенно предпочтительно от 0,08 до 0,5 мкм, измеренный с помощью динамического светорассеяния. ! 2. Водная суспензия по п.1, причем диаметр частиц dso, определенный с помощью лазерной дифракции (по средневзвешенной интенсивности), лежит в области от 0,01 мкм до 0,9 мкм. ! 3. Водная суспензия по п.1, в которой содержащий карбоксильные группы полностью или частично гидрированный нитрильный каучук находится с концентрацией твердого вещества от 5 до 65 вес.%, предпочтительно от 20 до 60 вес.%, особенно предпочтительно ...

ИЗДЕЛИЕ ИЗ НИТРИЛЬНОГО КАУЧУКА, ИМЕЮЩЕЕ ХАРАКТЕРИСТИКИ НАТУРАЛЬНОГО КАУЧУКА

... 1. Эластомерное изделие, образованное из бутадиен-нитрильной каучуковой композиции, содержащее подложку с заданной толщиной до около 0,12 мм, которая имеет ответную реакцию на приложенную силу, аналогичную реакции подложки из натурального латексного каучука с толщиной до около 0,15 мм, отличающееся тем, что имеет разрушающее усилие (F-BE) по меньшей мере около 8 ньютонов (Н) и усилие (F-400), вызывающее 400%-ное удлинение указанного изделия относительно первоначальных размеров, около до 3,5 ньютона (Н). ! 2. Эластомерное изделие по п.1, причем указанная подложка изделия имеет прочность на растяжение от около 30 до 55 МПа. ! 3. Эластомерное изделие по п.2, причем указанная подложка изделия имеет прочность на растяжение от около 40 до 50 МПа. ! 4. Эластомерное изделие по п.1, причем указанное усилие, вызывающее 300%-ное удлинение, составляет до около 1,5 Н. ! 5. Эластомерное изделие по п.1, причем указанная подложка изделия выполнена так, что она выдерживает разрушающую силу по меньшей мере ...

Способ получения искусственной кожи

Состав для склеивания волокон с каучуком

СОСТАВ ДЛЯ СКЛЕИВАНИЯ ВОЛОКОН С КАУЧУКОМ включающий сополи- , мёр на основе бутадиена, акрилонитркла н метакриловой кислоты в соотношении 65 ...

Beschichtete Textilerzeugnisse

GUMMI LATEX ZUSAMMENSETZUNGEN, DIE EINEN HYDROGENIERTEN GUMMILATEX ENTHALTEN

A carboxylated acrylonitrile butadiene latex seamless bladder and a process for manufacturing thereof

Elastomeric films

Water based coal tar emulsions

A method for preparing latex composition for dip-forming

An exemplary embodiment of the present invention provides a method for preparing a latex composition for dip forming, the method including: (a) preparing a monomer mixture including a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer; (b) introducing an additive including an inorganic solvent, an emulsifier and starch into the monomer mixture; and (c) preparing a copolymer latex by polymerizing the monomer mixture, wherein a content of the starch is 0.1 to 4.9 parts by weight with respect to 100 parts by weight of the monomer mixture.

SURFACE-MODIFIED FUELLSTOFFE.

ALKENYL NITRILE AND CONJUGATED DIOLEFIN POLYMER LATEX

Running tread for tyre

THREAD WOUND GOLF BALL

SULFUR-VULCANIZABLE ELASTOMER MIXTURE AND OXIDATION-RESISTANT VULCANIZATES THEREOF

PROCESS FOR PREPARING A RUBBER-ASPHALT COMPOSITION

NITRILE RUBBER COMPOSITION, LATEX COMPOSITION OF HIGHLY SATURATED NITRILE RUBBER, AND CROSS-LINKED RUBBER

A nitrile rubber composition comprising a highly saturated nitrile rubber (A) containing .alpha.,.beta.-ethylenically unsaturated nitrile monomer units in a ratio of 8 to 60 wt% and having an iodine value of 120 or less and an alkylated phenol compound (B), wherein a ratio of content of the alkylated phenol compound (B) with respect to a total of the highly saturated nitrile rubber (A) and the alkylated phenol compound (B) is 0.01 to 1 wt%, and a difference (.eta.2-.eta.1) between a plasticity number n2 after storage at 70°C for 7 days in a state of an aqueous dispersion by being dispersed in water and a plasticity number .eta.1 before the storage is 12 or less is provided.

THIN, SMOOTH NITRILE RUBBER GLOVES

ARTICLE MADE FROM NITRILE RUBBER

PROCEDE DE PREPARATION D'UNE COMPOSITION DE CAOUTCHOUC ET D'ASPHALTE

L'INVENTION A POUR OBJET UN PROCEDE DE PREPARATION D'UNE COMPOSITION DE CAOUTCHOUC ET D'ASPHALTE. IL CONSISTE A MELANGER UNE COMPOSITION DE CAOUTCHOUC PARTICULAIRE OU PULVERULENT COMPRENANT 100PARTIES EN POIDS D'UN CAOUTCHOUC PARTICULAIRE OU PULVERULENT AYANT UNE GROSSEUR DE PARTICULES NE DEPASSANT PAS 2MM ET DE 0,1 A 50PARTIES EN POIDS D'UN AGENT GONFLANT PARTICULAIRE OU PULVERULENT AYANT UNE GROSSEUR DE PARTICULES NE DEPASSANT PAS 1MM, AVEC UN ASPHALTE CONTENANT DE 0,1 A 30PARTIES EN POIDS D'UNE BASE ORGANIQUE POUR 100PARTIES EN POIDS DE L'ASPHALTE. PAVAGE DE ROUTES, REVETEMENT DE DIVERSES STRUCTURES MECANIQUES ET RECOUVREMENT DE TOITURES.

Process of formation of the mixtures of rubber

Composição adesiva e método para aderir um elemento de reforço de fibra têxtil a uma borracha de epdm

Fine-particle, stable suspensions of functionalized, completely or partially hydrogenated nitrile rubbers

Novel stable aqueous suspensions of a functionalized, completely or partially hydrogenated nitrile rubber are provided with very low emulsifier content and small particle diameter, as also is a process for production thereof and the use thereof for producing composite materials via coating of substrate materials with the suspension.

Fine-particle, stable suspensions of functionalized, completely or partially hydrogenated nitrile rubbers

Novel stable aqueous suspensions of a functionalized, completely or partially hydrogenated nitrile rubber are provided with very low emulsifier content and small particle diameter, furtheron a process for production thereof and the use thereof for producing composite materials via coating of substrate materials with the suspension.

Nitrile rubber glove with stretch modifier

An improved nitrile rubber formulation and process for making elastomeric nitrile rubber articles from the nitrile rubber formulation are disclosed. In particular, the nitrile rubber formulation can produce nitrile rubber based articles which exhibit force-strain characteristics that are comparable to those of natural rubber latex articles, while maintaining the tensile strength properties of nitrile rubber. The process includes adding a stretch modifier during the compounding of the nitrile rubber formulation. The invention also includes an elastomeric nitrile rubber product made by the process, such as examination glove, surgical glove, etc.

AQUEOUS IMPREGNATION CEMENT

ВОДНЫЕ СУСПЕНЗИИ СОДЕРЖАЩИХ КАРБОКСИЛЬНЫЕ ГРУППЫ, ПОЛНОСТЬЮ ИЛИ ЧАСТИЧНО ГИДРИРОВАННЫХ НИТРИЛЬНЫХ КАУЧУКОВ, СПОСОБ ИХ ПОЛУЧЕНИЯ И ИХ ПРИМЕНЕНИЕ

Изобретение относится к нитрильным каучукам, к водной суспензии содержащего карбоксильные группы, полностью или частично гидрированного нитрильного каучука. Водная суспензия содержащего карбоксильные группы, полностью или частично гидрированного нитрильного каучука включает максимально 1 вес.ч. эмульгатора, в расчете на 100 вес.ч. нитрильного каучука. При этом содержащий карбоксильные группы, полностью или частично гидрированный нитрильный каучук имеет в суспензии средний диаметр частиц в области от 0,01 до 0,9 мкм, измеренный с помощью динамического светорассеяния, или диаметр частиц d, определенный с помощью лазерной дифракции по средневзвешенной интенсивности в области от 0,01 мкм до 0,9 мкм. Изобретение позволяет повысить стабильность водной суспензии нитрильного каучука. 7 н. и 10 з.п. ф-лы, 7 табл., 37 пр.

ЭЛАСТОМЕРНАЯ РЕЗИНА И РЕЗИНОВЫЕ ИЗДЕЛИЯ, ПРОИЗВЕДЕННЫЕ БЕЗ ИСПОЛЬЗОВАНИЯ СЕРЫ И УСКОРИТЕЛЕЙ ВУЛКАНИЗАЦИИ

FIELD: chemistry. SUBSTANCE: invention refers to an elastomeric rubber glove made of a cross-linked elastomeric rubber film, which is formed of a layer deposited on a latex cast or ingot with vulcanising the deposited layer with no sulphur or vulcanising accelerators used. A film formulation contains carboxylate acrylonitrile butadiene latex mixed with metacrylic acid, or self-cross-linked carboxylate acrylonitrilebutadiene latex, metal oxide and pH adjuster for reducing pH from 9 to 10; the total solid phase concentration in the formulation falls within the range of 18 to 30%, whereas the total solid phase concentration is changed by water. EFFECT: formulation is vulcanised with no conventional sulphur and accelerators used that reduces a probability of the contact type 1 immediate hypersensitivity and type IV delayed hypersensitivity. 20 cl, 8 tbl, 6 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C08L 13/02 C08J 5/02 C08L 9/04 B29C 41/14 C08K 3/22 (13) 2 558 587 C2 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012127247/05, 01.12.2009 (24) Дата начала отсчета срока действия патента: 01.12.2009 (43) Дата публикации заявки: 10.01.2014 Бюл. № 1 (73) Патентообладатель(и): КОССАН Эс-Ди-Эн Би-Эйч-Ди (MY) R U Приоритет(ы): (22) Дата подачи заявки: 01.12.2009 (72) Автор(ы): ХУ Сион Хуи (MY), ЛИМ Лоуренс Сиау Тян (MY), ЛИ Сэк Пхин (MY), ОН Ен Лон (MY) (45) Опубликовано: 10.08.2015 Бюл. № 22 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 02.07.2012 (86) Заявка PCT: 2 5 5 8 5 8 7 (56) Список документов, цитированных в отчете о поиске: US 20060057320 А1, 16.03.2006. US 20030017286 A1, 21.01.2003. WO 2004044037 A1, 27.05.2004. RU 2007108352 A1, 20.10.2008. RU 2358626 C2, 20.06.2009 2 5 5 8 5 8 7 R U (87) Публикация заявки PCT: WO 2011/068394 (09.06.2011) Адрес для переписки: 190013, Санкт-Петербург, а/я 186, Можайскому М.А. (54) ЭЛАСТОМЕРНАЯ РЕЗИНА И ...

ЛАТЕКС И ФРИКЦИОННЫЙ МАТЕРИАЛ

УСТОЙЧИВЫЕ ПРИ ХРАНЕНИИ НИТРИЛЬНЫЕ КАУЧУКИ И СПОСОБ ИХ ПОЛУЧЕНИЯ

ВОДНЫЕ СУСПЕНЗИИ СОДЕРЖАЩИХ КАРБОКСИЛЬНЫЕ ГРУППЫ, ПОЛНОСТЬЮ ИЛИ ЧАСТИЧНО ГИДРИРОВАННЫХ НИТРИЛЬНЫХ КАУЧУКОВ, СПОСОБ ИХ ПОЛУЧЕНИЯ И ИХ ПРИМЕНЕНИЕ

Изобретение относится к нитрильным каучукам, к водной суспензии содержащего карбоксильные группы, полностью или частично гидрированного нитрильного каучука. Водная суспензия содержащего карбоксильные группы, полностью или частично гидрированного нитрильного каучука включает максимально 1 вес.ч. эмульгатора, в расчете на 100 вес.ч. нитрильного каучука. При этом содержащий карбоксильные группы, полностью или частично гидрированный нитрильный каучук имеет в суспензии средний диаметр частиц в области от 0,01 до 0,9 мкм, измеренный с помощью динамического светорассеяния, или диаметр частиц d, определенный с помощью лазерной дифракции по средневзвешенной интенсивности в области от 0,01 мкм до 0,9 мкм. Изобретение позволяет повысить стабильность водной суспензии нитрильного каучука. 7 н. и 10 з.п. ф-лы, 7 табл., 37 пр.

КОМПОЗИЦИЯ ДЛЯ ФОРМОВАНИЯ МЕТОДОМ ОКУНАНИЯ, СПОСОБ ИЗГОТОВЛЕНИЯ ПЕРЧАТКИ И ПЕРЧАТКА

Группа изобретений относится к композициям для формования методом окунания, способу изготовления перчатки и перчатке. Композиция для формования методом окунания содержит по меньшей мере следующие компоненты: эластомер, который содержит структурное звено, полученное из (мет)акрилонитрила, структурное звено, полученное из ненасыщенной карбоновой кислоты, и структурное звено, полученное из бутадиена, в основной цепи полимера, поликарбодиимид, гидроксид щелочного металла и воду. При этом гидроксид щелочного металла представляет собой гидроксид калия, эластомер содержит структурное звено, полученное из (мет)акрилонитрила, в количестве от 20 до 40% по массе, структурное звено, полученное из ненасыщенной карбоновой кислоты, в количестве от 1 до 10% по массе и структурное звено, полученное из бутадиена, в количестве от 50 до 75% по массе. Поликарбодиимид содержит по меньшей мере один поликарбодиимид, содержащий гидрофильный сегмент в своей молекулярной структуре, и добавлен в количестве, превышающем ...

VERBUNDWERKSTOFFE AUS VORBEHANDELTEM FASERMATERIAL UND VULKANISATEN AUS HNBR

A carboxylated acrylonitrile butadiene latex seamless bladder and a process for manufacturing thereof

Method of making a polymer article and resulting article

IONOMER IMPREGNATED THREAD-WOUND GOLF BALL

Improvements in or relating to sheet materials containing fibers, cork particles anda rubber-like binder and method of making same

... 692,326. Fibrous sheets containing cork &c. ARMSTRONG CORK CO. April 11, 1951. [June 16, 1950 ; Jan. 26, 1951] No. 8391/51. Class 96. Material for low cost gaskets, underlays for rugs, or cushioning for windows &c. in motor cars &c. is made from fibrous pulp e.g. of kraft, sulphite, cotton linters, asbestos, or glass or nylon filaments to which is added e.g. nearly an equal weight (on the fibre) of very small cork particles or cork dust, and a dilute solution of aluminium chloride, ferric chloride, or stannic chloride &c. which is reacted with ammonium hydroxide &c. to form the polyvalent metal hydroxide, which is of limited solubility, adding synthetic rubber latex e.g. a butadiene-styrene co-polymer, butadiene-acrylonitrile, neoprene, or homo-polymers of butadiene, acid e.g. acetic being then added slowly to coagulate the synthetic rubber, and release aluminium ions to precipitate it and the cork on to the fibres which are then felted, as on a paper-making machine. Anti-oxidant and dye ...

PROCEDURE FOR THE PRODUCTION OF INCREASED LATEXTEILCHEN

POLYMERLATEX TO THE PRODUCTION OF DIP-FORMED ARTICLES

ADHESIVE COMPOSITION AND METHOD FOR ADHERING TEXTILES TO EPDM RUBBER

Thin, smooth nitrile rubber gloves

A nitrile-rubber medical exam glove composed of a glove body which is a flexible layer of nitrile-butadiene rubber. The glove body has a chlorinated first surface forming a donning side of the glove body and an un-chlorinated second surface forming a grip side of the glove body. The elastomeric glove also includes a substantially uniform distribution of a release agent distributed over the un-chlorinated second surface of the glove body. The elastomeric glove has: (a) an average thickness of between about 0.03 to 0.12 mm in a palm region of the glove body as measured in accordance with ASTM D3767, procedure A; (b) an un-chlorinated second surface of the glove body characterized by a Surface Root Mean Square Roughness of from about 3.00 μm to about 6.55 μm; and (c) a failure rate of less than about 1 percent when the elastomeric glove is subjected to pinhole leak testing generally in accordance with ASTM D5151-06.

Thin, smooth nitrile rubber gloves

Elastomeric film-forming compositions and articles made from the elastomeric film

The invention relates to an elastomeric film-forming composition comprising a carboxylic acid- or ester-grafted polychlorobutadiene, and one or more cross-linking agents. The invention also relates to dipped articles, gloves, methods of manufacture and uses involving the composition.

SULFUR-VULCANIZABLE ELASTOMER MIXTURE AND OXIDATION-RESISTANT VULCANIZATES THEREOF

RUBBER PRODUCTS BASED ON IMPROVED NBR MASTERBATCH

Processes for dispersing nanocarbon into NBR rubber in a substantially uniform manner, nanocarbon-reinforced NBR produced by the process, and articles of manufacture produced from the nanocarbon-reinforced NBR are disclosed. The process involves preparing a nanocarbon dispersion, which optionally includes a surfactant, stabilizing agent and/or dispersant, ensuring that the nanocarbon does not include agglomerates, and mixing the dispersion with an NBR latex. The resulting composition is coagulated and dried to form an NBR-CNT (or CNT-NBR) masterbatch. After adding an appropriate additives package, the masterbatch can be formed into desired products, for example, using compression molding.

ELASTOMERIC FILM-FORMING COMPOSITIONS AND ARTICLES MADE FROM THE ELASTOMERIC FILM

The invention relates to an elastomeric film-forming composition comprising a carboxylic acid- or ester-grafted polychlorobutadiene, and one or more cross-linking agents. The invention also relates to dipped articles, gloves, methods of manufacture and uses involving the composition.

THIN, SMOOTH NITRILE RUBBER GLOVES

A nitrile-rubber medical exam glove composed of a glove body which is a flexible layer of nitrile-butadiene rubber. The glove body has a chlorinated first surface forming a donning side of the glove body and an un-chlorinated second surface form-ing a grip side of the glove body. The elastomeric glove also in-cludes a substantially uniform distribution of a release agent dis-tributed over the un-chlorinated second surface of the glove body. The elastomeric glove has: (a) an average thickness of between about 0.03 to 0.12 mm in a palm region of the glove body as mea-sured in accordance with ASTM D3767, procedure A; (b) an un-chlorinated second surface of the glove body characterized by a Surface Root Mean Square Roughness of from about 3.00 ~1/4m to about 6.55 ~1/4m; and (c) a failure rate of less than about 1 percent when the elastomeric glove is subjected to pinhole leak testing generally in accordance with ASTM D5151-06.

BLEND OF RUBBER LATICES CONTAINING A HYDROGENATED RUBBER LATEX

The present invention relates to a blend of rubber latices comprising, based on dry weight, (A) from about 80 to about 50 phr of a latex selected from the group consisting of polybutadiene latex, natural rubber or polyisoprene latex, styrene-butadiene copolymer latex, acrylonitrile-butadiene copolymer latex, butadiene-isoprene copolymer latex, isoprene-isobutylene copolymer latex, styrene-isoprene-butadiene copolymer latex and mixtures thereof; and (B) from about 20 to about 50 phr of a hydrogenated rubber latex that is prepared in accordance with a process comprising: (l) combining an unsaturated polymer in latex form, which is derived from 5 to 100 percent by weight of a conjugated diene monomer and 95 to 0 percent by weight of an ethylenically unsaturated monomer, with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from hydrazine and hydrates thereof; and (c) a metal ion activator; (2) heating the mixture to a temperature ...

Nitrile rubber composition, latex composition, and cross-linked rubber of high saturated nitrile rubber

SULPHUR-VALCANIZABLE ELASTOMER MIXTURE AND OXIDATION-RESISTANT VULCANIZATES THEREOF

A RUBBER COMPOSITION COMPRISING AN EPOXY RESIN AND A SPECIFIC AMINE HARDENER

PACKAGING MATERIAL

borracha estabilizada, processo para preparar as borrachas estabilizadas, mistura vulcanizável, processo para a preparação da mistura vulcanizável, processo para preparar vulcanizados da mistura vulcanizável, e, vulcanizado

POWDERED POLYSACCHARIDE-REINFORCED ELASTOMER MASTERBATCHES, COMPOUNDS, AND RESULTING VULCANIZED RUBBERS

CROSSLINKING POLYMER COMPOSITION

A polymer composition containing components A and B provides a crosslinked network to form an elastomeric film. Component A comprises A1 a high molecular weight polymer containing units having carboxyl and/or hyroxyl groups, and A2 a relatively low molecular weight coreactant polyelectrolyte containing units having carboxyl and/or hydroxyl groups. Component B comprises a polyfunctional crosslinking agent capable of crosslinking with carboxyl and/or hydroxyl groups at ambient temperatures or higher. Crosslinker B may polymerize into higher molecular weight polymers, form covalent cross links between polymer A1 and polyelectrolyte A2, and/or entrap or entangle polymers A1, A2, and B. The crosslinking reaction may be enhanced by using an acid or acid-forming catalyst.

Latex composition for dip molding, manufacturing method therefor, and molded product molded therefrom

A latex composition for dip molding includes a carboxylic acid-modified nitrile-based copolymer latex and a cholate-based emulsifier, wherein the cholate-based emulsifier is included in an amount of 0.02 to 3 parts by weight based on a solid content with respect to a solid content of 100 parts by weight of the carboxylic acid-modified nitrile-based copolymer latex. A method of preparing the latex composition for dip molding and a molded article produced using the same are also provided.

加水分解耐性ポリアミド-エラストマー混合物、それから製造される成形品及びそれらの使用

... 本発明は改良された加水分解耐性を有するポリアミド-エラストマー混合物に関する。この目的を達成するために、エラストマーは特にミクロゲルの形態で存在する。本発明のポリアミド-エラストマー混合物は、自動車産業において、例えば特に媒体を伝達する配管として使用される成形品に加工することができる。 ...

ИЗДЕЛИЕ ИЗ НИТРИЛЬНОГО КАУЧУКА, ИМЕЮЩЕЕ ХАРАКТЕРИСТИКИ НАТУРАЛЬНОГО КАУЧУКА

Изобретение относится к способу и материалу для изготовления эластомерных изделий из нитрильного каучука. Эластомерное изделие изготавливают из карбоксилированной бутадиен-нитрильной каучуковой композиции в латексной форме. Каучуковая композиция состоит из двух акрило-нитрильных композиций - первой и второй, взятых в соотношении от 60:40 до 40:60. Каучуковая композиция имеет температуру стеклования Tg в интервале от -15 до -30°С. Композиция содержит пропорциональное количество щелочного металла и оксида металла, где количество гидроксида металла составляет 0-1,5 частей, и количество оксида металла больше чем 0,5, но меньше или равно 1,5 частей на 100 сухих частей каучука. При этом изделие имеет заданную толщину до 0,12 мм. Изобретение позволяет получать изделия на основе нитрильного каучука, такие как эластомерные перчатки, имеющие свойства, характеризующие взаимозависимость силы и деформации, сравнимые с характеристиками изделий из натурального каучукового латекса, и сохраняющие при этом ...

Полимерный композиционный материал, содержащий стимуляторы биоразложения, для производства маканых изделий

Изобретение относится к созданию полимерного композиционного материала, содержащего стимуляторы биоразложения, для изготовления маканых изделий медицинского, бытового назначения методом коагулянтного отложения с регулируемым сроком эксплуатации. Полимерный композиционный материал, содержащий стимуляторы биоразложения, для производства маканых изделий, содержит латекс карбоксилатный бутадиен-нитрильного сополимера, вулканизующую систему, стимулятор биоразложения, при этом он содержит в своем составе латекс карбоксилатный бутадиен-нитрильного сополимера Ярлат БНК марки А, в качестве вулканизующей системы содержит: дисперсию серы в качестве агента вулканизации, дисперсию оксида цинка в качестве активатора вулканизации, дисперсию диэтилдитиокарбамат цинка в качестве ускорителя вулканизации, дисперсию стимулятора биоразложения, в качестве основы которой применяют отходы деревообрабатывающей и пищевой промышленности, представляющие собой древесную муку, кофейный жмых или крахмал картофельный, ...

METHOD FOR PRODUCING RUBBER COMPOSITION AND RUBBER COMPOSITION

A method for producing a rubber composition include a mixing step, a drying step, and a dispersion step. In the mixing step, an aqueous solution that includes at least one of oxycellulose fibers and cellulose nanofibers is mixed with rubber latex to obtain a first mixture. In the drying step, the first mixture is dried to obtain a second mixture. In the dispersion step, the second mixture is tight-milled using an open roll to obtain a rubber composition. The rubber composition does not include an aggregate that includes at least one of the oxycellulose fibers and the cellulose nanofibers, and has a diameter of 0.1 mm or more. 1. A rubber composition , comprising:at least one of oxycellulose fibers and cellulose nanofibers that are dispersed in the rubber composition in an untangled state,the rubber composition obtained by a method comprising:a mixing step that mixes an aqueous solution that includes the at least one of oxycellulose fibers and cellulose nanofibers with rubber latex to obtain a first mixture;a drying step that dries the first mixture to obtain a second mixture; anda dispersion step that tight-mills the second mixture using an open roll to obtain the rubber composition.2. A rubber composition comprising rubber , and at least one of oxycellulose fibers and cellulose nanofibers that are dispersed in the rubber in an untangled state , the rubber composition not including an aggregate that includes at least one of the oxycellulose fibers and the cellulose nanofibers , and has a diameter of 0.1 mm or more.3. The rubber composition as defined in claim 2 , comprising at least one of the oxycellulose fibers and the cellulose nanofibers in an amount of 0.1 to 60 parts by mass based on 100 parts by mass of the rubber. This is a divisional application of U.S. Patent Application Publication No. 2015/0111998, filed on Oct. 16, 2014, which in turn claims priority to Japanese Patent Application No. 2013-216804 filed on Oct. 17, 2013, and Japanese Patent Application ...

LATEX OF THE HIGHLY SATURATED NITRILE RUBBER AND ADHESIVE COMPOSITION

A latex of a highly saturated nitrile rubber wherein the highly saturated nitrile rubber contains α,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt %, has an iodine value of 120 or less, and has a weight average molecular weight of solubles in chloroform of 100,000 or less, and when removing volatiles contained in the latex and making a film of the highly saturated nitrile rubber, a loss tangent tan δat 50° C. of the film is 0.3 to 0.6 and a complex torque S* at the time of 100% shear strain at 100° C. of the film is 20 dNm or less, and an adhesive composition containing the latex are provided. 1. An adhesive composition comprising a latex of a highly saturated nitrile rubber wherein the highly saturated nitrile rubber contains α ,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt % has an iodine value of 120 or less , and has a weight average molecular weight of solubles in chloroform of 100 ,000 or less , and{'sub': '(50° C.)', 'when removing volatiles contained in the latex and making a film of the highly saturated nitrile rubber, a loss tangent tan δat 50° C. of the film is 0.3 to 0.6 and a complex torque S* at the time of 100% shear strain at 100° C. of the film is 20 dNm or less'}2. The adhesive composition according to further comprising a resorcinol formaldehyde resin.3. The adhesive composition according to wherein a content of the resorcinol formaldehyde resin is 5 to 30 parts by weight with respect to 100 parts by weight of a solid content of the latex of a highly saturated nitrile rubber.4. The adhesive composition according to wherein the highly saturated nitrile rubber further contains at least one of d ene monomer units and α-olefin monomer units in a ratio of 40 to 89.9 wt %.5. A fiber base material-highly saturated nitrile rubber composite obtained by bonding a fiber base material and a highly saturated nitrile rubber using the adhesive composition according to . This application is a Divisional ...

A COMPOSITION FOR MAKING HYDROPHOBIC ELASTOMERIC ARTICLE

The present invention relates to a composition for making a hydrophobic elastomeric article comprising a liquid polymer; 0.01 to 1.5 phr of carbon black; and 1 to 15 phr of hydrophobic dispersion comprises activated charcoal, a dispersing agent and a stabilizer. 19.-. (canceled)10. A composition for making a hydrophobic elastomeric article comprising:a liquid polymer;0.01 to 1.5 phr of carbon black;1 to 15 phr of a hydrophobic dispersion that includes activated charcoal, wherein the activated charcoal is present in an amount ranging from 20 to 40 wt % of a total weight of the hydrophobic dispersion;a dispersing agent; anda stabilizer.11. The composition according to claim 10 , wherein the dispersing agent is selected from the group consisting of sodium salts of polyacrylic acid claim 10 , maleic acid-acrylic copolymers or salt derivatives thereof claim 10 , sodium salts of naphthalene sulfonic acid claim 10 , and combinations thereof.12. The composition according to claim 10 , wherein the stabilizer is selected from the group consisting of polyethylene glycol claim 10 , dipropylene glycol claim 10 , propylene glycol claim 10 , and combinations thereof.13. The composition according to claim 10 , wherein the liquid polymer is selected from the group consisting of natural rubber latex claim 10 , nitrile latex claim 10 , polyisoprene claim 10 , polychloroprene claim 10 , polyurethane claim 10 , and combination thereof.14. The composition according to claim 10 , wherein the hydrophobic dispersion further comprises a thickening agent claim 10 , wherein the thickening agent is selected from the group consisting of china clay claim 10 , acrylic copolymers claim 10 , polysaccharides or their derivatives claim 10 , and combination thereof.15. The composition according to claim 10 , wherein at least 50% of the activated charcoal in the hydrophobic dispersion has a particle size of less than or equal to 10 μm.16. The composition according to claim 10 , further comprising:a ...

Biodegradable elastomeric film composition and method for producing the same

The invention relates to a method to manufacture an elastomeric article includes preparing a former for shaping the elastomeric article; dipping the former into a coagulant solution which including one or more one or more polyvalent metal salt, surfactant, wetting agents, anti-tack materials, non-settling agents, and biocide; dipping the coagulant-coated former into a synthetic latex composition from 20° C. to 40° C. at least once to create the elastomeric article; pre-leaching the elastomeric article for not more than 10 times; vulcanizing the elastomeric article to enable effective crosslinking; surface treating the vulcanized elastomeric article form 60° C. to 140° C.; post-leaching the elastomeric article at temperature of 30° C. to 95° C.; applying donning aid to the elastomeric article; drying the elastomeric article; and stripping the elastomeric article from the former. The elastomeric article has a thickness of 0.001 to 5 mm, a minimum tensile strength of 7 MPa, and an elongation above 300%. 1. A method to manufacture an elastomeric article comprising:preparing a former for shaping the elastomeric article;dipping the former into a coagulant solution, wherein the coagulant solution comprising one or more polyvalent metal salt, surfactant, wetting agents, anti-tack materials, non-settling agents, and biocide;dipping the coagulant-coated former into a synthetic latex composition comprising one or more elastomeric polymer, curatives, fillers, surfactants, non-settling agents and biocides, from 20° C. to 40° C. at least once to create the elastomeric article;pre-leaching the elastomeric article for not more than 10 times;vulcanizing the elastomeric article to enable effective crosslinking;vulcanization temperature of the elastomeric article ranges from 60° C. to 140° C.;post-leaching the elastomeric article at temperature of 30° C. to 95° C.;applying donning aid to the elastomeric article;drying the elastomeric article; andstripping the elastomeric article from ...

LATEX AND COMPOSITE

A latex including: a nitrile rubber containing an α,β-ethylenically unsaturated nitrile monomer unit in a content of 8 to 50 wt % and an α,β-ethylenically unsaturated dicarboxylic acid monoester monomer unit in a content of 1 to 10 wt %, and having an iodine value of 120 g/100 g or less; and a benzisothiazoline-based compound represented by the following general formula (1), wherein the content of the benzisothiazoline-based compound is 50 ppm by weight or more, with respect to the nitrile rubber, and a redox potential of the latex is 80 to 800 mV. 2. The latex according to claim 1 , wherein the benzisothiazoline-based compound is 1 claim 1 ,2-benzisothiazolin-3-one.3. The latex according to claim 1 , further comprising a thermosetting resin.4. A composite comprising a fiber base material and a rubber member claim 1 , wherein the fiber base material and the rubber member adhere by a bonding layer formed with the latex according to .5. A composite comprising a fiber base material and a rubber member claim 2 , wherein the fiber base material and the rubber member adhere by a bonding layer formed with the latex according to .6. A composite comprising a fiber base material and a rubber member claim 3 , wherein the fiber base material and the rubber member adhere by a bonding layer formed with the latex according to . The present invention relates to a latex that is not easy to rot or easy to yellow, and a composite obtained by using the latex.Latexes of nitrile rubbers containing a nitrile monomer unit have hitherto been used in a wide variety of applications. For example, such latexes have been used in a wide variety of fields: raw materials of nonwoven fabrics widely used as clothing, industrial materials such as filters and heat insulators, hygienic goods such as masks and white coats, automobile interior materials and air conditioning filters, and the like; compositions for dip forming of nipple, glove, and the like; adhesives between the woven-fabric base-material ...

GLOVE AND GLOVE COMPOSITION

An emulsion composition includes (1) a carboxylated acrylonitrile butadiene elastomer containing an acrylonitrile residue in an amount of 23 to 30 wt % and an unsaturated carboxylic acid residue in an amount of 3 to 8 wt %, and (2) a polyacrylonitrile butadiene elastomer containing an acrylonitrile residue in an amount of 20 to 50 wt % and having a weight average molecular weight (in terms of styrene) of 7,000 to 50,000. The weight ratio of the component (1)/the component (2) is from 70/30 to 90/10. 1. An emulsion composition comprising:(1) a carboxylated acrylonitrile butadiene elastomer containing an acrylonitrile residue in an amount of 23 to 30 wt % and{'sub': '(1+4)', 'an unsaturated carboxylic acid residue in an amount of 3 to 8 wt %, containing a sulfur element in a combustion product of the elastomer detected by a neutralization titration method in an amount of 1 wt % or less of the weight of the elastomer, and having Mooney density (ML(100° C.)) of 100 to 220; and'}(2) a polyacrylonitrile butadiene elastomer containing an acrylonitrile residue in an amount of 20 to 50 wt % and having a weight average molecular weight (in terms of styrene) of 7,000 to 50,000,wherein a weight ratio of the component (1)/the component (2) is from 70/30 to 90/10.2. The emulsion composition according to claim 1 , wherein the Mooney density (ML(100° C.)) of the component (1) is from 100 to 190.3. The emulsion composition according to claim 1 , wherein the weight average molecular weight of the component (2) is from 9 claim 1 ,000 to 30 claim 1 ,000.4. The emulsion composition according to claim 1 , wherein the weight ratio of the component (1)/the component (2) is from 70/30 to 85/15.5. The emulsion composition according to claim 1 , further comprising:(3) a divalent metal oxide in an amount of 0.5 to 4.0 parts by weight; and(4) a dispersant in an amount of 0.5 to 2.0 parts by weight,with respect to the total 100 parts by weight of the component (1) and the component (2).6. The ...

Polymer latex and layered product

A polymer latex including a polymer and at least one polysaccharide selected from the group consisting of tamarind gum, xanthan gum, cationized xanthan gum, gellan gum, guar gum and cationized guar gum.

LATEX COMPOSITION FOR DIP MOLDING AND DIP-MOLDED ARTICLE

A latex composition for dip-molding obtained by mixing a latex of conjugated diene polymer (A) having a glass transition temperature of 10° C. or less and a latex of polymer (B) having a glass transition temperature above 10° C. A latex composition for dip-molding capable of providing a dip-molded article excellent in wear resistance, as well as wet grip when water and oil are deposited thereon can be provided. 1. A latex composition for dip-molding obtained by mixing a latex of conjugated diene polymer (A) having a glass transition temperature of 10° C. or less and a latex of polymer (B) having a glass transition temperature above 10° C.2. The latex composition for dip-molding according to claim 1 , wherein the conjugated diene polymer (A) is a nitrile group-containing conjugated diene polymer.3. The latex composition for dip-molding according to claim 1 , wherein a content of the conjugated diene polymer (A) is 40 parts by weight or more based on 100 parts by weight of a polymer component.4. The latex composition for dip-molding according to claim 1 , wherein the glass transition temperature of the polymer (B) is 30° C. or more.5. The latex composition for dip-molding according to claim 4 , wherein the glass transition temperature of the polymer (B) is 50° C. or more.6. The latex composition for dip-molding according to claim 1 , wherein the polymer (B) contains a monomer unit having a halogen atom.7. The latex composition for dip-molding according to claim 6 , wherein the polymer (B) is vinyl chloride resin.8. The latex composition for dip-molding according to claim 7 , wherein the vinyl chloride resin does not contain a plasticizer.9. The latex composition for dip-molding according to claim 7 , wherein the vinyl chloride resin is a copolymer of vinyl chloride and a monomer copolymerizable with the vinyl chloride.10. The latex composition for dip-molding according to claim 1 , further comprising a sulfur cross-linking agent.11. The latex composition for dip- ...

METHOD FOR PRODUCING LAMINATE

A method of producing a laminated body, the method including a coagulant solution deposition step of depositing a coagulant solution on a fiber substrate, and a coagulation step of forming a polymer layer on the fiber substrate by bringing a polymer latex into contact with the fiber substrate having the coagulant solution deposited thereon to cause a polymer to coagulate. As the coagulant solution, a solution obtained by dissolving or dispersing 0.2 to 7.0% by weight of a metal salt as a coagulant and 0.1 to 7.0% by weight of an organic acid in a solvent is used. In the method of producing a laminated body, the metal salt is a polyvalent metal salt. In the method of producing a laminated body, the organic acid is an organic acid having at least one group selected from a carboxyl group, a sulfo group, a hydroxy group, and a thiol group. 1. A method of producing a laminated body , the method comprising:a coagulant solution deposition step of depositing a coagulant solution on a fiber substrate; anda coagulation step of forming a polymer layer on the fiber substrate by bringing a polymer latex into contact with the fiber substrate having the coagulant solution deposited thereon to cause a polymer to coagulate,wherein as the coagulant solution, a solution obtained by dissolving or dispersing 0.2 to 7.0% by weight of a metal salt as a coagulant and 0.1 to 7.0% by weight of an organic acid in a solvent is used.2. The method of producing a laminated body according to claim 1 , wherein the metal salt is a polyvalent metal salt.3. The method of producing a laminated body according to claim 1 , wherein the organic acid is an organic acid having at least one group selected from a carboxyl group claim 1 , a sulfo group claim 1 , a hydroxy group claim 1 , and a thiol group.4. The method of producing a laminated body according to claim 1 , wherein a polymer constituting the polymer latex is a nitrile rubber.5. The method of producing a laminated body according to claim 1 , ...

METHOD FOR PRODUCING CARBOXYL-GROUP-CONTAINING NITRILE RUBBER

A method of producing a carboxyl group-containing nitrile rubber including a coagulation step of coagulating a carboxyl group-containing nitrile rubber component by mixing a monovalent metal salt and a polymer flocculating agent into a carboxyl group-containing nitrile rubber latex having an iodine value of 120 or less, wherein the monovalent metal salt is compounded in an amount of 3 to 25 parts by weight and the polymer flocculating agent is compounded in an amount of 0.01 to 10 parts by weight relative to 100 parts by weight of a rubber solid content in the latex, and a weight ratio of the monovalent metal salt/the polymer flocculating agent is in the range of 10 to 500 1. A method of producing a carboxyl group-containing nitrile rubber , the method comprising a coagulation step of coagulating a carboxyl group-containing nitrile rubber component by mixing a monovalent metal salt and a polymer flocculating agent into a carboxyl group-containing nitrile rubber latex , wherein the monovalent metal salt is compounded in an amount of 3 to 25 parts by weight and the polymer flocculating agent is compounded in an amount of 0.01 to 10 parts by weight relative to 100 parts by weight of a rubber solid content in the latex , and a weight ratio of the monovalent metal salt/the polymer flocculating agent is in the range of 10 to 500.2. The method of producing a carboxyl group-containing nitrile rubber according to claim 1 , wherein the polymer flocculating agent is a cationic polymer flocculating agent.4. The method of producing a carboxyl group-containing nitrile rubber according to claim 1 , wherein the carboxyl group-containing nitrile rubber contains an α claim 1 ,β-ethylenically unsaturated carboxylate ester monomer unit.5. A method of producing a crosslinkable rubber composition claim 1 , the method comprising a step of compounding a crosslinking agent to a carboxyl group-containing nitrile rubber obtained through the production method according to .6. A method of ...

Nitrile rubber article

A latex formulation for preparing an accelerator-free nitrile rubber article comprising a mixture of at least one base polymer, a crosslinker, and a pH adjuster, wherein the crosslinker is an admixture of metal-based compound, wherein the metal-based compound is a trivalent metal-based compound, polyethylene glycol or derivatives of polyethylene glycol, wherein the polyethylene glycol or derivatives of polyethylene glycol have molecular weight ranging in between 200 Da to 20 000 Da, hydroxide salts, wherein the hydroxide salt is selected from the group consisting of potassium hydroxide, sodium hydroxide, ammonium hydroxide or mixtures thereof, and water, where the latex formulation includes polyethylene oxide, wherein the polyethylene oxide having molecular weight ranging in between 20 kDa to 1000 kDa.

Carboxylic Acid Modified Nitrile Based Copolymer Latex, Method for Preparing the Copolymer Latex, Latex Composition for Dip-Forming Comprising the Copolymer Latex and Article Formed by the Composition

Provided is a carboxylic acid-modified nitrile-based copolymer latex, and more particularly, provided are a carboxylic acid-modified nitrile-based copolymer latex which includes a carboxylic acid-modified nitrile-based copolymer including a main monomer-derived repeating unit; and a repeating unit derived from a monomer represented by Chemical Formula 1 below, the main monomer-derived repeating unit including a conjugated diene-based monomer-derived repeating unit, an ethylenically unsaturated nitrile-based monomer-derived repeating unit, and an ethylenically unsaturated acid monomer-derived repeating unit (see description of the present invention), a method for preparing a carboxylic acid-modified nitrile-based copolymer latex, a latex composition for dip-forming including the copolymer latex, and an article formed by the composition. 2. The carboxylic acid-modified nitrile-based copolymer latex of claim 1 , wherein Ris a hydroxyl group claim 1 , Ris a C1-C5 alkylene group claim 1 , A is a (meth)acrylamide group claim 1 , an allyl amide group claim 1 , an α-amino acid group or a β-amino acid group claim 1 , and n is an integer selected from 2 to 3.4. The carboxylic acid-modified nitrile-based copolymer latex of claim 1 , wherein the monomer represented by Chemical Formula 1 comprises dopamine (meth)acrylamide claim 1 , 3 claim 1 ,4-dihydroxyphenylalanine claim 1 , N-acetyldopamine claim 1 , N-(3 claim 1 ,4-dihydroxyphenethyl)acrylamide claim 1 , dopamine allylamide claim 1 , or tyrosine.5. The carboxylic acid-modified nitrile-based copolymer latex of claim 1 , wherein an amount of the repeating unit derived from the monomer represented by Chemical Formula 1 is 0.5 to 5 parts by weight based on 100 parts by weight of a total amount of the main monomer-derived repeating unit.710. The method of claim 6 , wherein at the time of the polymerization of step (S) claim 6 , an entire amount of each of the conjugated diene-based monomer claim 6 , the ethylenically unsaturated ...

BINDER COMPOSITION FOR SECONDARY BATTERY ELECTRODE, CONDUCTIVE MATERIAL PASTE COMPOSITION FOR SECONDARY BATTERY ELECTRODE, SLURRY COMPOSITION FOR SECONDARY BATTERY ELECTRODE, ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY

A binder composition for a secondary battery electrode contains a polymer that includes a nitrile group-containing monomer unit, an aromatic vinyl monomer unit, and a linear alkylene structural unit and that has a residual mercaptan content, by mass, of not less than 1 ppm and not more than 50 ppm. 1. A binder composition for a secondary battery electrode comprising a polymer , whereinthe polymer includes a nitrile group-containing monomer unit, an aromatic vinyl monomer unit, and a linear alkylene structural unit, andresidual mercaptan content in the polymer is not less than 1 ppm and not more than 50 ppm based on mass of the polymer.2. The binder composition for a secondary battery electrode according to claim 1 , wherein a proportion of insoluble content when the polymer is dissolved in N-methylpyrrolidone is 1 mass % or less.3. The binder composition for a secondary battery electrode according to claim 1 , wherein the polymer has a weight-average molecular weight of not less than 10 claim 1 ,000 and not more than 2 claim 1 ,000 claim 1 ,000.4. A conductive material paste composition for a secondary battery electrode comprising: a conductive material; and the binder composition for a secondary battery electrode according to .5. The conductive material paste composition for a secondary battery electrode according to claim 4 , wherein the conductive material includes carbon nanotubes.6. A slurry composition for a secondary battery electrode comprising: an electrode active material; a solvent; and the binder composition for a secondary battery electrode according to .7. An electrode for a secondary battery comprising an electrode mixed material layer formed using the slurry composition for a secondary battery electrode according to .8. A secondary battery comprising a positive electrode claim 6 , a negative electrode claim 6 , an electrolyte solution claim 6 , and a separator claim 6 , wherein{'claim-ref': {'@idref': 'CLM-00007', 'claim 7'}, 'at least one of the ...

Nitrile Rubber Article having Natural Rubber Characteristics

An carboxylated nitrile-butadiene rubber latex formulation composed of a blend of a first acrylonitrile terpolymer and a second acrylonitrile terpolymer, wherein: the acrylonitrile content of the blended terpolymers is between 17 and 45% by weight, the methacrylic acid content of the blended termpolymers is less than 15% by weight, and the remaining balance of the terpolymers being butadiene. The invention also includes an elastomeric nitrile rubber article made from the formulation. 1. A carboxylated nitrile-butadiene rubber latex formulation comprising a blend of a first acrylonitrile terpolymer and a second acrylonitrile terpolymer , wherein:the acrylonitrile content of the blended terpolymers is between 17 and 45% by weight,the methacrylic acid content of the blended termpolymers is less than 15% by weight, andthe remaining balance of the terpolymers being butadiene.2. The formulation of claim 1 , wherein the first and second acrylonitrile terpolymer are in a compositional ratio ranging from 60:40 to 40:60.3. The formulation of claim 1 , wherein the first acrylonitrile terpolymer has a lower modulus relative to the second acrylonitrile terpolymer claim 1 , and the second terpolymer has better film forming properties than the first acrylonitrile terpolymer.4. The formulation of claim 1 , wherein carboxylated nitrile-butadiene terpolymer latex formulation further comprises claim 1 , in terms of parts per 100 dry parts of rubber consisting of the carboxylated nitrile-butadiene terpolymer claim 1 , between 0-1.5 parts of an alkali agent that provides monovalent ions and 0.5-1.5 parts of a metallic oxide wherein the total combined amount of the alkali agent and metallic oxide is greater than 1.0 part per 100 dry parts of rubber.5. The formulation of claim 4 , further comprising in terms of parts per 100 dry parts of rubber consisting of the carboxylated nitrile-butadiene terpolymer claim 4 , from 0.5-1.5 parts sulfur and 0.5-1.5 parts rubber accelerator.6. The ...

AROMATIC ENOL ETHER PAINT ADDITIVES

Disclosed are aromatic enol ethers that have utility as film-hardening additives for coating formulations. The aromatic enol ethers have particular utility as film-hardening additives for water-based coating formulations. The aromatic enol ethers provide improvements in hardness and hardness related properties such as block resistance without contributing to the volatile organic content of the composition. 2. The aromatic enol ether of wherein A is 1 claim 1 ,2- claim 1 , 1 claim 1 ,3- claim 1 , or 1 claim 1 ,4-disubstituted phenyl.3. The aromatic enol ether of wherein Ris hydrogen or an ethyl group.4. The aromatic enol ether of wherein claim 1 , n is an integer from 1 to 4.5. The aromatic enol ether of wherein the composition has a volatile organic content of less than 50 wt % according to ASTM D6886.6. The coating composition of wherein said latex compound is an acrylic polymer claim 1 , a vinyl acrylic polymer claim 1 , a styrene butadiene polymer or a styrene acrylic latex polymer claim 1 , or a mixture thereof.7. The coating composition of wherein said latex compound has a Tg in the range of from about −20° C. to about 100° C.8. The coating composition of wherein said latex compound is a styrene claim 1 , methyl acrylate claim 1 , methyl methacrylate claim 1 , ethyl acrylate claim 1 , ethyl methacrylate claim 1 , butyl acrylate claim 1 , butyl methacrylate claim 1 , isobutyl acrylate claim 1 , isobutyl methacrylate claim 1 , ethylhexyl acrylate claim 1 , 2-ethylhexyl methacrylate claim 1 , 2-ethylhexyl acrylate claim 1 , isoprene claim 1 , octyl acrylate claim 1 , octyl methacrylate claim 1 , iso-octyl acrylate claim 1 , iso-octyl methacrylate claim 1 , acrylic acid claim 1 , methacrylic acid claim 1 , itaconic acid claim 1 , crotonic acid claim 1 , O-methyl styrene claim 1 , vinyl naphthalene claim 1 , vinyl toluene claim 1 , chloromethyl styrene claim 1 , hydroxyethyl (meth)acrylate claim 1 , hydroxypropyl (meth)acrylate claim 1 , acrylonitrile claim 1 , ...

LATEX COMPOSITION, PRODUCTION METHOD THEREFOR, COMPOSITE MATERIAL, AND CONDUCTIVE FORMED PRODUCT

Provided is a latex composition consists of a latex including a polymer having a tetrahydrofuran-insoluble component content of at least 5 mass % and no greater than 75 mass %; carbon nanotubes having an average diameter Av and a diameter distribution 3σ satisfying a relationship 0.60>3σ/Av>0.20; and an additive selected from the group consisting of a dispersant, a cross-linking agent, a plasticizer, an antioxidant, a heat stabilizer, a light stabilizer, an ultraviolet absorber, a pigment, a colorant, a foaming agent, a flame retardant, a lubricant, a softener, a tackifier, a mold release agent, a deodorant, and a perfume. The carbon nanotubes have a specific surface area of at least 600 m/g, and in a Raman spectrum of the carbon nanotubes, a ratio of G band peak intensity relative to D band peak intensity (G/D ratio) is at least 1 and no greater than 20. 1. A latex composition consisting of:a latex including a polymer having a tetrahydrofuran-insoluble component content of at least 5 mass % and no greater than 75 mass %;carbon nanotubes having an average diameter Av and a diameter distribution 3σ satisfying a relationship 0.60 >3σ/Av>0.20; andan additive selected from the group consisting of a dispersant, a cross-linking agent, a plasticizer, an antioxidant, a heat stabilizer, a light stabilizer, an ultraviolet absorber, a pigment, a colorant, a foaming agent, a flame retardant, a lubricant, a softener, a tackifier, a mold release agent, a deodorant, and a perfume, wherein{'sup': '2', 'the carbon nanotubes have a specific surface area of at least 600 m/g, and'}in a Raman spectrum of the carbon nanotubes, a ratio of G band peak intensity relative to D band peak intensity (G/D ratio) is at least 1 and no greater than 20.2. The latex composition of claim 1 , whereinthe carbon nanotubes constitute no greater than 10 parts by mass per 100 parts by mass of the polymer.3. The latex composition of claim 1 , whereinthe polymer is a conjugated diene rubber.4. A latex ...

Latex Composition for Dip Molding, a Method of Preparing the Same, and Molded Article Therefrom

Provided is a latex composition for dip molding. The latex composition for dip molding includes a carboxylic acid-modified nitrile-based copolymer latex and a hydrophobically modified alkali-soluble emulsion thickener, wherein the hydrophobically modified alkali-soluble emulsion thickener includes a copolymer including an associative portion and a non-associative portion, and the associative portion includes a monomer-derived repeating unit substituted by one or more first hydrophobic groups selected from the group consisting of alkyl, alkenyl, perfluoroalkyl, and carbosilyl having 8 to 15 carbon atoms, and aryl, arylalkyl, arylalkenyl, alicyclic alkyl, and polycyclic alkyl having 6 to 15 carbon atoms. A method of preparing the latex composition for dip molding, and a molded article manufactured therefrom are also provided. 1. A latex composition for dip molding , comprising:a carboxylic acid-modified nitrile-based copolymer latex, anda hydrophobically modified alkali-soluble emulsion thickener, whereinthe hydrophobically modified alkali-soluble emulsion thickener includes a copolymer including an associative portion and a non-associative portion, andthe associative portion includes a monomer-derived repeating unit substituted by one or more first hydrophobic groups selected from the group consisting of alkyl, alkenyl, perfluoroalkyl, and carbosilyl having 8 to 15 carbon atoms, and aryl, arylalkyl, arylalkenyl, alicyclic alkyl, and polycyclic alkyl having 6 to 15 carbon atoms.2. The latex composition for dip molding of claim 1 , wherein the associative portion includes a monomer-derived repeating unit substituted by one or more hydrophobic groups selected from the group consisting of alkyl claim 1 , alkenyl claim 1 , perfluoroalkyl claim 1 , and carbosilyl having 12 to 14 carbon atoms claim 1 , and aryl claim 1 , arylalkyl claim 1 , arylalkenyl claim 1 , alicyclic alkyl claim 1 , and polycyclic alkyl having 10 to 15 carbon atoms.3. The latex composition for dip ...

Latex Composition For Dip Molding, And Molded Product Manufactured Therefrom

The present invention relates to a latex composition for dip-molding comprising a mixture of latex pigment and carboxylic acid-modified nitrile based copolymer latex which are two types of latex having Tg different to each other, and a dip-molded article produced therefrom. 1. A latex composition for dip-molding comprisinga) a latex pigment including a modified-nitrile based copolymer copolymerized from a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated monomer, plasticizer and a reactive compound with a reactive group in the molecular structure; andb) a carboxylic acid-modified nitrile based copolymer latex copolymerized from a conjugated diene-based monomer, an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer.2. The latex composition for dip-molding according to claim 1 , characterized in that the latex pigment has a glass transition temperature of 30 to 80° C. and a particle diameter of 100 to 300 nm.3. The latex composition for dip-molding according to claim 1 , characterized in that the carboxylic acid-modified nitrile based copolymer latex has a glass transition temperature of −40 to −15° C. and a particle diameter of 100 to 200 nm.4. The latex composition for dip-molding according to claim 1 , characterized in that the composition for dip-molding includes a) the latex pigment and b) the carboxylic acid-modified nitrile based copolymer latex in a weight ratio of 5:95 to 50:50 claim 1 , as calculated as the solid content.5. The latex composition for dip-molding according to claim 1 , characterized in that the modified-nitrile based copolymer is copolymerized from 5 to 30 wt. % of the conjugated diene-based monomer claim 1 , 10 to 50 wt. % of ethylenically unsaturated nitrile monomer and 40 to 80 wt. % of ethylenically unsaturated monomer claim 1 , based on the total of 100 wt. % of the monomers.6. The latex composition for dip-molding according to claim 1 , ...

Softer Blended Nitrile Elastomeric Article

An elastomeric article is formed from a blend of nitrile rubber and polychloroprene rubber. The elastomeric article can be a glove, such as a medical exam glove. The elastomeric article is softer than a conventional nitrile elastomeric article. The elastomeric article is formed from a blended rubber latex emulsion of nitrile and polychloroprene. The blended rubber latex emulsion may be free of sulfur and vulcanization accelerators.

Elastomeric composition for an elastomeric article

The present invention relates to an elastomeric composition, wherein the elastomeric composition comprises an additive selected from any one or a combination of fluorine and silicone compounds in the production of a hypoallergenic elastomeric article.

ARTICLE CONTAINING BOTH THERMOPLASTIC AND ELASTOMER

A latex formulation comprising elastomer, thermoplastic, accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant, filler, pH adjuster and dispersing medium, wherein the latex formulation has a total solid content ranging between 5% by weight to 40% by weight. Further, the present invention discloses a method of preparing a latex formulation to manufacture a glove containing both thermoplastic and elastomer, wherein the method comprises the steps of blending elastomer with thermoplastic to produce a dispersion containing both thermoplastic and elastomer and stirring the dispersion containing both thermoplastic and elastomer, adding while stirring accelerator, antifoaming agent, antioxidant, crosslinker, colouring agent, surfactant and filler one after another with no particular order and followed by pH adjuster into the dispersion containing both thermoplastic and elastomer to produce latex formulation and stirring the latex formulation continuously and allowing the latex formulation to mature, wherein total solid content of the latex formulation is adjusted to be between 5% by weight to 40% by weight by way of addition of dispersing medium into the latex formulation and wherein pH range of the latex formulation is adjusted to be between 9 to 11. 1. Latex formulation comprising elastomer , thermoplastic , accelerator , antifoaming agent , antioxidant , crosslinker , colouring agent , surfactant , filler , pH adjuster and dispersing medium , wherein the elastomer is any one selected from the group consisting of carboxylated acrylonitrile butadiene rubber (XNBR) , acrylonitrile butadiene rubber (NBR) or mixtures therefrom , wherein the thermoplastic is any one selected from the group consisting of polyvinyl chloride (PVC) , chlorinated polyvinyl chloride , poly(vinyl chloride/vinyl acetate) copolymer or mixtures therefrom , wherein the elastomer is used in an amount ranging between 50 phr to 99 phr and wherein the thermoplastic is used in ...

LATEX COMPOSITION AND FRICTION MATERIAL

A latex composition including a latex containing rubber particles composed of a carboxyl group-containing nitrile rubber containing an α,β-ethylenically unsaturated nitrile monomer unit in a content of 8-60 wt %, and having an iodine value 120 or less, an isothiazoline-based compound represented by formula (1) in a content of 26 ppm by weight or more, and a benzisothiazoline-based compound represented by formula (2) in a content of 26 ppm by weight or more, both with respect to the carboxyl group-containing nitrile rubber, and a pH of less than 12. 2. The latex composition according to claim 1 , wherein the isothiazoline-based compound represented by the general formula (1) is 2-methyl-4-isothiazolin-3-one.3. The latex composition according to claim 1 , wherein the benzisothiazoline-based compound represented by the general formula (2) is 1 claim 1 ,2-benzisothiazolin-3-one.4. The latex composition according to claim 1 , wherein the ratio of the content of the isothiazoline-based compound represented by the general formula (1) to the content of the benzisothiazoline-based compound represented by the general formula (2) is 1:10 to 10:1 in terms of the ratio of (weight of the isothiazoline-based compound represented by general formula (1)/weight of the benzisothiazoline-based compound represented by general formula (2)).5. The latex composition according to claim 1 , further comprising a thermosetting resin.6. The latex composition according to claim 5 , wherein the thermosetting resin is a phenolic resin.7. A friction material prepared by making the latex composition according to attached to or mixed with a base material.8. A friction material prepared by making the latex composition according to attached to or mixed with a base material. The present invention relates to a latex composition excellent in rotting resistance, and additionally excellent in heat resistance and friction properties, and a friction material obtained by using the aforementioned latex ...

METHOD FOR PRODUCING LATEX COMPOSITION

A method for producing a composition containing a latex of a nitrile rubber of α,β-ethylenically unsaturated nitrile monomer unit of 8 to 60 wt % content, and an iodine value of 120 or less, an isothiazoline-based compound represented by formula (1), and a benzisothiazoline-based compound represented by formula (2), both in a content of 26 ppm by weight or more to the rubber, wherein adding both compounds to the latex at 2,000 ppm by weight/min or less, at 50° C. or lower, and the compounds in an aqueous state having 0.1 to 40 wt % concentration. 2. The method for producing a latex composition according to claim 1 , wherein in the addition step claim 1 , the isothiazoline-based compound and the benzisothiazoline-based compound are added in a state of a composite aqueous solution having a total concentration of the isothiazoline-based compound and the benzisothiazoline-based compound of 0.1 to 40 wt % to the latex of the nitrile rubber.3. The method for producing a latex composition according to claim 1 , wherein the pH of the latex of the nitrile rubber is less than 12.4. The method for producing a latex composition according to claim 1 , wherein the nitrile rubber contains a carboxyl group-containing monomer unit.5. A method for producing a nitrile rubber composition claim 1 , comprising a step of coagulating the latex composition obtained by the method according to .6. A method for producing a resin-containing latex composition claim 1 , comprising a step of mixing the latex composition obtained by the method according to claim 1 , and a thermosetting resin with each other.7. A method for producing a friction material claim 6 , comprising a step of making the resin-containing latex composition obtained by the method according to attached to or mixed with a base material. The present invention relates to a latex composition effectively suppressed in the generation of aggregates and excellent in rotting resistance.Latexes of nitrile rubbers containing nitrile ...

LATEX OF THE HIGHLY SATURATED NITRILE RUBBER AND ADHESIVE COMPOSITION

A latex of a highly saturated nitrile rubber wherein the highly saturated nitrile rubber contains α,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt %, has an iodine value of 120 or less, and has a weight average molecular weight of solubles in chloroform of 100,000 or less, and when removing volatiles contained in the latex and making a film of the highly saturated nitrile rubber, a loss tangent tan δat 50° C. of the film is 0.3 to 0.6 and a complex torque S* at the time of 100% shear strain at 100° C. of the film is 20 dNm or less, and an adhesive composition containing the latex are provided. 1. A latex of a highly saturated nitrile rubber whereinthe highly saturated nitrile rubber contains α,β-ethylenically unsaturated nitrile monomer units in a ratio of 10 to 60 wt %, has an iodine value of 120 or less, and has a weight average molecular weight of solubles in chloroform of 100,000 or less, and{'sub': '(50° C.)', 'when removing volatiles contained in the latex and making a film of the highly saturated nitrile rubber, a loss tangent tan δat 50° C. of the film is 0.3 to 0.6 and a complex torque S* at the time of 100% shear strain at 100° C. of the film is 20 dNm or less.'}2. The latex of a highly saturated nitrile rubber according to claim 1 , wherein when removing volatiles contained in the latex and making a film of the highly saturated nitrile rubber claim 1 , a difference Δ tan δ=tan δ−tan δ claim 1 , which is a difference of the loss tangent tan δat 50° C. and a loss tangent tan δat 150° C. of the film claim 1 , is 0.35 or less.3. The latex of a highly saturated nitrile rubber according to claim 1 , wherein when removing volatiles contained in the latex and making a film of the highly saturated nitrile rubber claim 1 , a storage modulus G′at 100° C. of the film is 200 kPa or less.4. The latex of a highly saturated nitrile rubber according to claim 1 , wherein the highly saturated nitrile rubber contains 10 to 60 wt % of α claim 1 ...

A biodegradable elastomeric film composition and method for producing the same

The invention relates to an elastomeric article made from a cured product of synthetic latex composition, characterized by a base polymer; a solubilized polyvalent metal hydroxide having a pH above 9.0 at a range of 0.0001 to 0.20 phr; a milled polyvalent metal oxide; an alkali solution for solubilizing the polyvalent metal hydroxide; and fillers at 0.5 phr minimum for manufacturing the elastomeric article with biodegradable properties; wherein said elastomeric article having thickness of 0.001 to 5 mm; tensile strength of 7 MPa; and elongation of 300% minimum. The invention also relates to the method to manufacture the elastomeric article, comprising preparing a former for shaping the elastomeric article; dipping the former into a coagulant solution; drying the coagulant-coated former; dipping the dried coagulant-coated former into a synthetic latex composition to create the elastomeric article; followed by pre-leaching; vulcanizing; surface treating; post-leaching; applying donning aid; drying and stripping the elastomeric article from the former. 1. An elastomeric article made from a cured product of synthetic latex composition , characterized by:a base polymer;a solubilized polyvalent metal hydroxide having a pH above 9.0 at a range of 0.0001 to 0.20 phr;a milled polyvalent metal oxide at a range of 0-0.45 phr;an alkali solution for solubilizing the polyvalent metal hydroxide; andfillers at 0.5 phr minimum for manufacturing an elastomeric article with biodegradable properties; wherein said elastomeric article having thickness of 0.001 to 5 mm, tensile strength of 7 MPa, and elongation of 300% minimum.2. The elastomeric article according to claim 1 , wherein the base polymer is selected from the group of carboxylated synthetic polymer consisting one or a combination of:carboxylated acrylonitrile butadiene;styrene butadiene;carboxylated styrene butadiene;polychlorobutadiene;polydichlorobutadiene;butyl rubber;polyisoprene;polyvinyl chloride;polybutadiene; ...

Latex Composition For Dip-Molding, And Molded Article Prepared From Same

The present invention relates to a latex composition for dip-molding and a molded article produced therefrom. More specifically, the above composition can be used to prepare the dip-molded articles having gentle syneresis, no stickiness, and excellent chemical resistance by using monoglyceride. 1. A latex composition for dip-molding characterized by comprising a carboxylic acid-modified nitrile based copolymer latex copolymerized from conjugated diene-based monomers , ethylenically unsaturated nitrile monomers and ethylenically unsaturated acid monomers; and monoglyceride.2. The latex composition for dip-molding according to claim 1 , characterized in that the latex composition for dip-molding contains 0.01 to 5 parts by weight of the monoglyceride based on 100 parts by weight of carboxylic acid-modified nitrile based copolymer.3. The latex composition for dip-molding according to claim 1 , characterized in that the monoglyceride is at least one selected from the group consisting of glycerol monolaurate claim 1 , glycerol monostearate claim 1 , glycerol monobehenate claim 1 , glycerol monocaprylate claim 1 , and glycerol monocaprate.4. The latex composition for dip-molding according to claim 1 , characterized in that the carboxylic acid-modified nitrile-based copolymer is copolymerized from 40 to 89 wt. % of the conjugated diene-based monomer claim 1 , 10 to 50 wt. % of ethylenically unsaturated nitrile monomer and 0.1 to 10 wt. % of ethylenically unsaturated acid monomer based on the total sum of 100% by weight of the monomers.5. The latex composition for dip-molding according to claim 1 , characterized in that the conjugated diene-based monomer is at least one selected from the group consisting of 1 claim 1 ,3-butadiene claim 1 , 2 claim 1 ,3-dimethyl-1 claim 1 ,3-butadiene claim 1 , 2-ethyl-1 claim 1 ,3-butadiene claim 1 , 1 claim 1 ,3-pentadiene and isoprene.6. The latex composition for dip-molding according to claim 1 , characterized in that the ethylenically ...

LATEX FORMULATION FOR MAKING ELASTOMERIC PRODUCTS

A latex formulation for making an elastomeric product, more particularly an elastomeric glove. The formulation comprises a mixture of at least one base polymer, a cross-linker; and a pH adjuster, where the pH adjuster provides a pH range of 9.5 to 10.5 to the latex composition. Still further, the present invention discloses a method for preparing a latex formulation for making elastomeric products, such as an elastomeric glove, without using accelerators, zinc oxide or sulphur. 2. The latex formulation as recited in wherein the elastomeric product is an elastomeric glove.3. The latex formulation as recited in wherein the base polymer is synthetic latex.4. The latex formulation as claimed in wherein the synthetic latex comprises at least one of carboxylated polyacrylonitrile butadiene claim 3 , neoprene claim 3 , or polyisoprene.5. The latex formulation as recited in wherein the synthetic latex comprises carboxylated polyacrylonitrile butadiene.6. The latex formulation as recited in wherein the trivalent metal comprises at least one of aluminium claim 1 , iron claim 1 , or chromium.7. The latex formulation as recited in wherein the trivalent metal-based compound comprises at least one of an aluminium based compound claim 1 , an iron (III) based compound claim 1 , or a chromium (III) based compound.8. The latex formulation as recited in wherein the trivalent metal-based compound comprises at least one of aluminium oxide claim 1 , aluminium sulphate claim 1 , aluminium chloride claim 1 , aluminium hydroxide claim 1 , aluminium phosphate claim 1 , or sodium aluminate.9. The latex formulation as recited in wherein the trivalent metal-based compound comprises aluminium hydroxide.10. The latex formulation as recited in wherein the cross-linker includes about 1% to about 20% by weight of the trivalent metal or trivalent metal-based compound.11. The latex formulation as recited in wherein the cross-linker contains about 3% by weight of the trivalent metal or trivalent metal- ...

SEMI TRANSPARENT NITRILE GLOVE

A semi transparent nitrile glove comprising nitrile latex, caustic alkali accelerators, vulcanizing agents, stabilizer and antifoaming agent, wherein the nitrile latex is any one selected from either acrylonitrile butadiene copolymer or carboxylated acrylonitrile butadiene copolymer, wherein the caustic alkali is a combination of either potassium hydroxide and ammonia or sodium hydroxide and ammonia, wherein the accelerators are chemical compounds of dithiocarbamates, wherein the vulcanizing agents are selected from both ionic and covalent vulcanizing agents, wherein the stabilizer is any one of either sodium dodecylbenzene sulfonate or sodium dodecyl sulfate and wherein the antifoaming agent is any one from a group consisting of silicone based antifoam, non-silicone based antifoam, oil based antifoam and water based antifoam wherein the semi transparent glove is without pigment and without titanium dioxide. 1. A semi transparent nitrile glove comprising nitrile latex , caustic alkali , accelerators , vulcanizing agents , stabilizer and antifoaming agent , wherein the nitrile latex is any one selected from either acrylonitrile butadiene copolymer or carboxylated acrylonitrile butadiene copolymer , wherein the caustic alkali is a combination of either potassium hydroxide and ammonia or sodium hydroxide and ammonia , wherein the accelerators are chemical compounds of dithiocarbamates , wherein the vulcanizing agents are selected from both ionic and covalent vulcanizing agents , wherein the stabilizer is any one of either sodium dodecylbenzene sulfonate or sodium dodecyl sulfate and wherein the antifoaming agent is any one from a group consisting of silicone based antifoam , non-silicone based antifoam , oil based antifoam and water based antifoam , wherein the semi transparent glove is without pigment and without titanium dioxide , wherein the acrylonitrile butadiene copolymer is an admixture of 25 to 35% by weight of acrylonitrile and 65 to 75% by weight of butadiene ...

Latex for bonding fiber structures

The present invention relates to a polymer latex obtained from the emulsion polymerization in aqueous medium of a mixture of ethylenically unsaturated monomers comprising: (a) more than 60 wt. % to 75 wt. % of at least one aliphatic conjugated diene (b) 10 wt. % to 30 wt. % of at least one vinyl aromatic compound; and (c) 0.5 to 5 wt. % of at least one ethylenically unsaturated silane bearing at least one silicon bonded hydrolysable group; (d) 0.1 to 8 wt. % of at least one ethylenically unsaturated acid; and (e) 0 to 20 wt. % of at least one further ethylenically unsaturated compound different from any of compounds (a) to (d), the weight percentages being based on the total amount of monomers and add up to 100 wt. %, to a binder comprising said polymer latex and to a fiber structure fortified by said binder.

LATEX AND FRICTION MATERIAL

A latex of a carboxyl group-containing nitrile rubber contains an α,β-ethylenically unsaturated nitrile monomer unit in a content of 8 to 60 wt % and having an iodine value of 120 or less, wherein the total content of potassium and sodium contained in the latex is 2,300 to 10,000 ppm by weight with respect to the whole latex. 1. A latex of a carboxyl group-containing nitrile rubber containing an α ,β-ethylenically unsaturated nitrile monomer unit in a content of 8 to 60 wt % , and having an iodine value of 120 or less ,wherein the total content of potassium and sodium contained in the latex is 2,300 to 10,000 ppm by weight with respect to the whole latex.2. The latex according to claim 1 , wherein the total content of potassium and sodium is 4 claim 1 ,500 to 33 claim 1 ,000 ppm by weight with respect to the carboxyl group-containing nitrile rubber.3. The latex according to claim 1 , wherein the pH is less than 12.4. A latex composition comprising the latex according to and a thermosetting resin.5. The latex composition according to claim 4 , wherein the thermosetting resin is a phenolic resin.6. A friction material prepared by making the latex composition according to attached to or mixed with a base material.7. A friction material prepared by making the latex composition according to attached to or mixed with a base material. The present invention relates to a latex excellent in chemical stability and thermal stability, and additionally, excellent in heat resistance and friction properties, and a friction material obtained by using the aforementioned latex.Latexes of nitrile rubbers containing nitrile monomer units have hitherto been used in a wide variety of applications. For example, such latexes have been used in a wide variety of fields: raw materials of nonwoven fabrics widely used as clothing, industrial materials such as filters and heat insulators, hygienic goods such as masks and white coats, automobile interior materials and air conditioning filters, and ...

METHOD FOR PREPARING CARBOXYLIC ACID MODIFIED-NITRILE BASED COPOLYMER LATEX

Disclosed is a method of preparing a carboxylic acid modified-nitrile based copolymer latex including: initiating emulsion polymerization of a monomer mixture including a conjugated diene-based monomer, ethylenic unsaturated nitrile-based monomer, ethylenic unsaturated acid monomer, and water-soluble monomer in the presence of water and 0.01 to 0.1 parts by weight of a lipid-soluble initiator based on 100 parts by weight of total of monomer mixture, and at a weight ratio (M/W) of the monomer mixture to water of 1.1 to 1.4 (S10); adding water when the polymerization conversion rate is 30 to 40% at a weight ratio (M/W) of 0.8 to 1.0 (S20); and adding water when the polymerization conversion rate is 60 to 70% at a weight ratio (M/W) of 0.6 to 0.7 (S30), when the polymerization conversion rate is between ≥10% and <60%, 0.1 to 2.0 parts by weight of sodium naphthalene sulfonate formaldehyde condensate based on 100 parts by weight of the total monomer mixture is introduced. 1. A method of preparing a carboxylic acid modified-nitrile based copolymer latex , the method comprising:initiating emulsion polymerization of a monomer mixture comprising a conjugated diene-based monomer, an ethylenic unsaturated nitrile-based monomer, an ethylenic unsaturated acid monomer, and a water-soluble monomer in the presence of water and 0.01 to 0.1 parts by weight of a lipid-soluble initiator based on 100 parts by weight of the total of monomer mixture, and at a weight ratio (M/W) of the monomer mixture to water of 1.1 to 1.4, in a reactor (S10);adding water when a polymerization conversion rate of the polymerization is 30 to 40% to control the weight ratio (M/W) to 0.8 to 1.0 (S20); andadding water when the polymerization conversion rate of the polymerization is 60 to 70% to control the weight ratio (M/W) to 0.6 to 0.7 (S30),wherein when the polymerization conversion rate of the polymerization is between 10% or more and less than 60%, 0.1 to 2.0 parts by weight of a sodium naphthalene ...

ELASTOMERIC FILM-FORMING COMPOSITIONS AND ARTICLES MADE FROM THE ELASTOMERIC FILM

The invention relates to an elastomeric film-forming composition comprising (a) a copolymer formed from monomers consisting of chlorobutadiene and an ethylenically unsaturated carboxylic acid or ester, and (b) one or more cross-linking agents. The invention also relates to dipped articles, gloves, methods of manufacture and uses involving the composition. 1. A dipped article made from an elastomeric film-forming composition comprising: [{'br': None, 'sup': 1', '2', '3, 'CRH═CR—C(O)—OR'}, {'br': None, 'or'}, {'br': None, 'sup': 1', '2', '3, 'CRH═CR—O—C(O)—R'}], '(a) a copolymer formed from monomers consisting of chlorobutadiene and an ethylenically unsaturated carboxylic acid or ester in which the ethylenically unsaturated carboxylic acid or ester has the formulawherein{'sup': 1', '4', '5', '4', '5, 'Ris hydrogen, an alkyl radical containing 1 to 4 carbon atoms, —C(O)—ORor —R—C(O)—OH, wherein Ris hydrogen or an alkyl radical containing 1 to 4 carbon atoms and Ris an alkyl radical containing 1 to 4 carbon atoms;'}{'sup': '2', 'Ris hydrogen, an alkyl radical containing 1 to 4 carbon atoms, or a carboxymethyl radical;'}{'sup': 3', '6', '7', '8', '6', '7', '8, 'Ris hydrogen, an alkyl radical containing 1 to 4 carbon atoms, or —RO—C(O)—CR═CR, wherein Ris an alkyl radical containing 1 to 4 carbon atoms, and Rand Rare each independently hydrogen or an alkyl radical containing 1 to 4 carbon atoms; and'}cis or trans isomers thereof, and(b) one or more cross-linking agents,wherein the composition has a pH within the range of from 8.5 to 13.5.2. The dipped article of claim 1 , wherein the copolymer of chlorobutadiene and an ethylenically unsaturated carboxylic acid or ester contains the carboxylic acid or ester in an amount of from 0.01% to 8% by weight of the chlorobutadiene units present in the polymer.3. The dipped article of claim 1 , wherein the copolymer of chlorobutadiene and an ethylenically unsaturated carboxylic acid or ester comprises from 10 to 60% chlorine by ...

Carboxylic Acid-modified Nitrile-based Copolymer Latex And Latex Composition For Dip Molding Comprising Same

The present invention relates to a carboxylic acid-modified nitrile-based copolymer latex, a preparation method for producing the same, a latex composition for dip-molding comprising the same, and a molding product prepared therefrom, more particularly to a carboxylic acid-modified nitrile-based copolymer latex capable of ensuring physical properties equivalent to or better than those using sulfur and vulcanization accelerators or cross-linking agents such as zinc oxide without using them by preparing the latex so that a large amount of anionic compound is present on the surface of the latex particles, a preparation method for producing the same, a latex composition for dip-molding comprising the same, and a molding product prepared therefrom.

CARBOXYLIC ACID-MODIFIED NITRILE-BASED COPOLYMER LATEX, METHOD FOR PREPARING SAME, LATEX COMPOSITION FOR DIP MOLDING CONTAINING SAME, AND DIP-MOLDED ARTICLE

The present invention relates to a carbonic acid-modified nitrile-based copolymer latex, a process for producing the same, a latex composition for dip-molding comprising the latex composition and a molded article produced therefrom. More specifically, modified nitrile-based copolymer latex, which can improve the stability of latex even with the use of inorganic pigments by making the inherently modified nitrile-based copolymer latex, enables the production of a dip-molded article having a smoothness of syneresis, less stickiness, and excellent tensile strength, a process for producing the same, a latex composition for dip-molding comprising the same, and a molded article made therefrom. 1. A carbonic acid-modified nitrile-based copolymer latex which is produced adding starch during copolymerization and has a glass transition temperature of −50 to −15° C. and an average particle diameter of 50 to 500 nm.2. The latex of claim 1 , wherein the starch has a weight-average molecular weight of 300 to 30 claim 1 ,000 g/mol.3. The latex of claim 1 , wherein the starch is added in an amount of 1 to 30 parts by weight based on 100 parts by weight of the total amount of the monomers.4. The latex of claim 1 , wherein the starch includes one selected from the group consisting of rice starch claim 1 , barley starch claim 1 , corn starch claim 1 , waxy corn starch claim 1 , tapioca starch claim 1 , potato starch claim 1 , sweet potato starch claim 1 , wheat starch and modified starch thereof.5. The latex of claim 4 , wherein the modified starch includes one selected from the group consisting of oxidized starch claim 4 , acid-treated starch claim 4 , ester starch claim 4 , ether starch claim 4 , phosphoric acid bridged starch claim 4 , acetyl adipate acid starch claim 4 , and combinations thereof.6. The latex of claim 1 , wherein the carbonic acid-modified nitrile-based copolymer is by copolymerization of monomers comprising 40 to 89% by weight of a conjugated diene monomer claim 1 ...

CARBOXYLIC ACID MODIFIED-NITRILE BASED COPOLYMER LATEX FOR DIP-FORMING, LATEX COMPOSITION FOR DIP-FORMING COMPRISING THE SAME AND PRODUCT THEREOF

Disclosed are a carboxylic acid-modified nitrile copolymer latex for dip molding comprising a combination of a carboxylic acid-modified nitrile copolymer latex and a carboxylic acid-modified styrene copolymer latex, a latex composition for dip molding comprising the same and a molded article prepared therefrom. Molded articles with superior tensile strength are produced by respectively preparing a carboxylic acid-modified nitrile latex having a low glass transition temperature and an average particle diameter of 90 nm or higher, and a carboxylic acid-modified styrene latex having a glass transition temperature of 80° C. or higher and an average particle diameter less than 90 nm and then mixing the two latexes. 1. A carboxylic acid-modified nitrile copolymer latex for dip molding comprising:a carboxylic acid-modified nitrile copolymer latex having a glass transition temperature of −50° C. to −15° C. and an average particle diameter not less than 90 nm and not more than 200 nm; anda carboxylic acid-modified styrene copolymer latex having a glass transition temperature of 80° C. or higher and an average particle diameter not less than 15 nm and less than 90 nm.2. The carboxylic acid-modified nitrile copolymer latex for dip molding according to claim 1 , wherein the carboxylic acid-modified nitrile copolymer latex having a glass transition temperature of −50° C. to −15° C. or higher and an average particle diameter not less than 90 nm and less than 200 nm and the carboxylic acid-modified styrene copolymer latex having a glass transition temperature of 80° C. or higher and an average particle diameter not less than 15 nm and less than 90 nm are present at a weight ratio of 97:3 to 85:15.3. The carboxylic acid-modified nitrile copolymer latex for dip molding according to claim 1 , wherein the carboxylic acid-modified nitrile copolymer latex having a glass transition temperature of −50° C. to −15° C. or higher and an average particle diameter not less than 90 nm and less ...

Latex dipped article with a modified polyvinyl alcohol layer which resist to water, solvents and diluted solvents

A glove is provided that includes an outer layer and an inner layer. The outer layer includes a polyvinyl alcohol (PVA) composite including PVA chemically modified with nano cellulose and pre cross linked nitrile latex. The inner layer includes nitrile latex.

Method for preparing graphene oxide/white carbon black/rubber nanocomposite material

A method for preparing a graphene oxide/white carbon black/rubber nanocomposite material is described. The prepared graphene oxide/white carbon black/rubber nanocomposite material contains nanoscale graphene oxide and white carbon black that are highly dispersed. The nanocomposite material has a relatively high modulus, excellent wear resistance and tear resistance, a relatively low rolling resistance, and at the same time has a low air-permeability and excellent self-healing capability.

Latex composition for dip-forming

Disclosed are a latex composition for dip-forming and a dip-formed nitrile glove produced therefrom which comprise nanoparticulate zinc oxide in a latex for dip-forming, thus advantageously exhibiting superior workability during glove production, having excellent wear sensation due to low modulus at 300%, and not readily tearing in spite of small thickness due to high tensile strength. In addition, the latex composition stably maintains a pH in spite of using a small amount of pH adjuster and thus improves glove production process efficiency.

LATEX COMPOSITION FOR DIP MOLDING AND MOLDED ARTICLE MANUFACTURED THEREFROM

Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, by using a water-soluble polymer such as poly(N-isopropylacrylamide) or a copolymer thereof in combination with a carbonic acid-modified nitrile-based copolymer latex, the stability of the latex is improved through crosslinking by hydrogen bonding, it is possible to manufacture a molded article which has a slow syneresis and is excellent in workability and does not tear even at a thin thickness due to high tensile strength. 1. A latex composition for dip-molding comprising: a carbonic acid-modified nitrile-based copolymer latex; and an poly(N-isopropylacrylamide) or a copolymer thereof.2. The composition according to claim 1 , wherein the carbonic acid-modified nitrile-based copolymer latex has a glass transition temperature of −50 to −15° C. and an average particle diameter of 90 to 200 nm.3. The composition according to claim 1 , the poly(N-isopropylacrylamide) or copolymer thereof has a number average molecular weight of 5 claim 1 ,000 to 80 claim 1 ,000 g/mol.4. The composition according to claim 1 , the poly(N-isopropylacrylamide) or copolymer thereof is used as an aqueous solution having a concentration of 0.5 to 15% by weight.5. The composition according to claim 1 , wherein the poly(N-isopropylacrylamide) copolymer is copolymerized with an N-isopropylacrylamide monomer and one ethylenically unsaturated carbonic acid monomer selected from the group consisting of acrylic acid claim 1 , methacrylic acid claim 1 , itaconic acid claim 1 , maleic acid claim 1 , fumaric acid and combinations thereof.6. The composition according to claim 5 , wherein the poly(N-isopropylacrylamide) copolymer is copolymerized with 80 or more and less than 100 mol % of N-isopropylacrylamide monomer and more than 0 and not more than 20 mole % of ethylenically unsaturated carbonic acid monomer.7. The composition according to claim 1 , wherein the latex composition for dip- ...

Latex for dip molding, composition for dip molding, preparation method of dip molded product, and dip molded product prepared thereby

Provided are a latex for dip molding, a composition for dip molding, a preparation method of a dip molded product, and a dip molded product prepared thereby. The latex for dip molding includes a conjugated diene monomer, an ethylenically unsaturated nitrile monomer, and an ethylenically unsaturated acid monomer, wherein the latex further includes sodium methallyl sulfonate as a copolymerizable ionic monomer. A dip molded product having excellent tensile strength, elongation, and touch may be obtained from a composition using the latex according to the present invention, and the generation of limitations, such as non-uniformity of physical properties and difficulties in product management, may be prevented.

CARBOXYLIC ACID MODIFIED-NITRILE BASED COPOLYMER COMPOSITION AND DIP-FORM ARTICLE THEREOF

Disclosed are a carboxylic acid modified-nitrile based copolymer composition and a dip-formed article produced therefrom. More specifically, disclosed are a copolymer composition comprising a carboxylic acid modified-nitrile copolymer latex having a glass transition temperature of a −60 to −10° C. and a carboxylic acid modified-styrene copolymer latex having a glass transition temperature of 30 to 110° C., and a dip-formed article produced therefrom. 1. A copolymer composition comprising:a carboxylic acid modified-nitrile copolymer latex (A) having a glass transition temperature of a −60 to −10° C. and a carboxylic acid modified-styrene copolymer latex (B) having a glass transition temperature of 30 to 110° C.,wherein the carboxylic acid modified-nitrile copolymer latex (A) has an average particle diameter of 100 to 160 nm and the carboxylic acid modified-styrene copolymer latex (B) has an average particle diameter of 160 to 260 nm.2. The copolymer composition according to claim 1 , wherein the carboxylic acid modified-nitrile copolymer and the carboxylic acid modified-styrene copolymer (A:B) are present in a weight ratio of A:B of 98:2 to 76:24.3. The copolymer composition according to claim 1 , wherein the carboxylic acid modified-nitrile copolymer latex having a glass transition temperature of −60 to −10° C. and the carboxylic acid modified-styrene copolymer latex having a glass transition temperature of 30 to 110° C. are present in an amount of 80 to 99% by weight with respect to the weight of the copolymer composition.4. The copolymer composition according to claim 1 , wherein the carboxylic acid modified-nitrile copolymer latex comprises a conjugated diene monomer claim 1 , an ethylenically unsaturated nitrile monomer and an ethylenically unsaturated acid monomer.5. The copolymer composition according to claim 1 , wherein the carboxylic acid modified-styrene copolymer latex comprises a conjugated diene monomer claim 1 , an aromatic vinyl monomer claim 1 , an ...

Polymer Latex for Dip-Molding Applications

The present invention relates to a polymer latex for dip-molding applications including: particles of a carboxylated conjugated diene nitrile latex polymer in combination or association with particles of a latex polymer including at least one oxirane-functional group, to the use of said polymer latex for the production of dip-molded articles or for coating or impregnating a substrate, to compounded compositions including said polymer latex, to a method for making dip-molded articles and to articles made by using said polymer latex. 1. A polymer latex for dip-molding applications comprising:(a) particles of a carboxylated conjugated diene nitrile latex polymer (a) obtainable by free-radical emulsion polymerization of a mixture of ethylenically unsaturated monomers comprising:15 to 99 wt.-% of conjugated dienes;1 to 80 wt.-% of monomers selected from ethylenically unsaturated nitrile compounds;0.05 to 10 wt.-% of ethylenically unsaturated acids and/or salts thereof;0 to 50 wt.-% of vinyl aromatic monomers; and0 to 65 wt.-% of alkyl esters of ethylenically unsaturated acids,the weight percentages being based on the total monomers in the mixture,in combination or association with(b) particles of a latex polymer (b) comprising at least one oxirane-functional group; whereinthe monomer composition of the latex polymer (a) is different from the monomer composition of the latex polymer (b).2. The polymer latex of claim 1 , whereinthe conjugated dienes are selected from butadiene, isoprene, 2,3-dimethyl-1,3-butadiene, 2-ethyl-1,3-butadiene, 1,3-pentadiene or combinations thereof;the ethylenically unsaturated nitrile compounds are selected from (meth)acrylonitrile, alpha-cyanoethyl acrylonitrile, fumaronitrile, alpha-chloronitrile or combinations thereof;the ethylenically unsaturated acids and salts thereof are selected from (meth)acrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid, ethylenically unsaturated sulfonic acids, ethylenically unsaturated ...

SYNTHETIC RUBBER LATEX COMPOSITIONS WITH IONIC LIQUID FOR ELASTOMERIC GLOVES

Provided are compositions and associated methods for producing elastomeric rubber gloves with improved strength and flexibility at desirable glove palm thicknesses. An example elastomeric rubber glove comprises a substrate formed from a composition comprising a synthetic rubber latex, and an ionic liquid. The ionic liquid may comprise a combination of one or more alkyl imidazole ionic salts. The composition may comprise one or more metal oxides, including at least one of zinc oxide, magnesium oxide, cadmium oxide, and aluminum oxide. The synthetic rubber latex compositions were found to yield a material with strength and flexibility characteristics comparable to natural latex gloves of a greater thickness. The described gloves may also be cured without the addition of Sulphur and other vulcanization or rubber accelerators, further reducing the risk of allergies and costs of production. 1. An elastomeric rubber glove comprising: a synthetic rubber latex, and', 'an ionic liquid., 'a substrate formed from a composition comprising2. The elastomeric rubber glove of claim 1 , wherein the ionic liquid is present in the composition between 0.05 to 1.5 parts per hundred rubber.3. The elastomeric rubber glove of claim 1 , wherein the ionic liquid comprises a combination of one or more alkyl imidazole ionic salts selected from the group consisting of:1-Butylimidazole, 1-Methylimidazole, 1-Hexylimidazole, and Bromo-1-imidazole.4. The elastomeric rubber glove of claim 1 , wherein the composition further comprises one or more metal oxides claim 1 , wherein the one or more metal oxides includes at least one of zinc oxide claim 1 , magnesium oxide claim 1 , cadmium oxide claim 1 , and aluminum oxide.5. The elastomeric rubber glove of claim 4 , wherein the one or more metal oxides are present in the composition between 0 to 1.5 parts per hundred rubber.6. The elastomeric rubber glove of claim 4 , wherein the composition further comprises one or more functional materials claim 4 , ...

LATEX COMPOSITION FOR DIP-FORMING INCLUDING CARBOXYLIC ACID MODIFIED-NITRILE BASED COPOLYMER LATEX AND DIP-FORMED ARTICLE PEREPARED THEREFROM

The present invention relates to a latex composition for dip-forming including two different types of carboxylic acid modified-nitrile based copolymer latex, and a dip-formed article prepared therefrom having excellent durability for sweat, and having high tensile strength and elongation percentage. Accordingly, the latex composition for dip-forming has excellent tensile strength, elongation percentage, stress and durability, and is useful in industries requiring these, for example, a rubber glove industry and the like. 1. A latex composition for dip-forming comprising:a) carboxylic acid modified-nitrile based copolymer latex having a glass transition temperature of −30° C. to −5° C. and an average particle diameter of 100 nm to 200 nm, and including a reactive compound; andb) carboxylic acid modified-nitrile based copolymer latex having a glass transition temperature of −30° C. to −15° C. and an average particle diameter of 100 nm to 200 nm.2. The latex composition for dip-forming of claim 1 , wherein the composition includes the a) carboxylic acid modified-nitrile based copolymer latex and the b) carboxylic acid modified-nitrile based copolymer latex in a weight ratio of 3:7 to 8:2.3. The latex composition for dip-forming of claim 1 , wherein the a) carboxylic acid modified-nitrile based copolymer latex includes 0.1 parts by weight to 5 parts by weight of the reactive compound with respect to 100 parts by weight of a monomer mixture claim 1 , and the monomer mixture includes 40% by weight to 89% by weight of a conjugated diene-based monomer; 10% by weight to 50% by weight of an ethylenically unsaturated nitrile-based monomer; and 0.1% by weight to 10% by weight of an ethylenically unsaturated acid monomer claim 1 , andwherein the b) carboxylic acid modified-nitrile based copolymer latex includes 40% by weight to 89% by weight of a conjugated diene-based monomer; 10% by weight to 50% by weight of an ethylenically unsaturated nitrile-based monomer; and 0.1% by ...

LATEX COMPOSITION FOR DIP FORMING AND DIP-FORMED ARTICLE PREPARED THEREFROM

Provided is a latex composition for dip forming which includes 100 parts by weight of a nitrile-based hybrid latex including a first latex and a second latex which have different glass transition temperatures, and 2 parts by weight to 8 parts by weight of an ion-conductive polymer having a weight-average molecular weight of 400 to 1,000. The latex composition for dip forming has excellent low-temperature stability and a dip-formed article prepared using the composition has excellent tensile strength and elongation. Since wearing comfort is improved due to a decrease in modulus, the dip-formed article may be suitable for industries requiring such properties. 1. A latex composition for dip forming , the latex composition comprising:100 parts by weight of a nitrile-based hybrid latex including a first latex and a second latex which have different glass transition temperatures; and1 to 8 parts by weight of an ion-conductive polymer having a weight-average molecular weight of 400 to 1,000.2. The latex composition for dip forming of claim 1 , wherein the first latex has a glass transition temperature of −50° C. to −25° C. claim 1 , and the second latex has a glass transition temperature of −25° C. to −15° C.3. The latex composition for dip forming of claim 1 , wherein the first latex has an average particle diameter of 90 nm to 200 nm claim 1 , and the second latex has an average particle diameter of 100 nm to 200 nm.4. The latex composition for dip forming of claim 1 , wherein the hybrid latex comprises 30 wt % to 80 wt % of the first latex and 20 wt % to 70 wt % of the second latex.5. The latex composition for dip forming of claim 1 , wherein the ion-conductive polymer has a weight-average molecular weight of 550 to 650.6. The latex composition for dip forming of claim 1 , wherein the ion-conductive polymer comprises at least one selected from the group consisting of polyethylene glycol claim 1 , polyethylene oxide claim 1 , polypropylene glycol claim 1 , and ...

Nitrile Rubber Glove with Stretch Modifier

An improved nitrile rubber formulation and process for making elastomeric nitrile rubber articles from the nitrile rubber formulation are disclosed. In particular, the nitrile rubber formulation can produce nitrile rubber based articles which exhibit force-strain characteristics that are comparable to those of natural rubber latex articles, while maintaining the tensile strength properties of nitrile rubber. The process includes adding a stretch modifier during the compounding of the nitrile rubber formulation. The invention also includes an elastomeric nitrile rubber product made by the process, such as examination glove, surgical glove, etc. 1. An elastomeric article comprising a compounded nitrile rubber formulation , the compounded nitrile rubber formulation comprising a nitrile rubber , an alkali agent , a metal oxide , sulfur crosslinking agent , a vulcanization accelerator , and a stretch modifier.23-. (canceled)4. The elastomeric article of claim 1 , wherein the alkali agent is present in the compounded rubber nitrile formulation in an amount ranging from about 0.1 parts to about 0.99 parts based on 100 dry parts of the nitrile rubber.5. (canceled)6. The elastomeric article of claim 1 , wherein the metal oxide is present in the compounded rubber nitrile formulation in an amount ranging from about 0.01 parts to about 0.5 parts based on 100 dry parts of the nitrile rubber.7. The elastomeric article of claim 1 , wherein the combined amount of the alkali agent and the metal oxide present in the compounded rubber nitrile formulation is less than or equal to 1 claim 1 , based on 100 dry parts of the nitrile rubber.810-. (canceled)11. The elastomeric article of claim 1 , wherein the stretch modifier is a wax emulsion.12. The elastomeric article of claim 11 , wherein the wax emulsion comprises a micronized wax.13. The elastomeric article of claim 12 , wherein the micronized wax has a mean particle size ranging from about 0.1 micrometers to about 50 micrometers.14. ...

Polymer Latex Composition for Dip-Molding Applications

A polymer latex composition for dip-molding applications includes the reaction product obtained by free-radical emulsion polymerization in aqueous medium of ethylenically unsaturated monomers including; (a) 19.9 to 90 wt.-% of at least one aliphatic conjugated diene; (b) 9.9 to 80 wt.-% of at least one unsaturated nitrile; (c) 0.1 to 10 wt.-% of at least one ethylenically unsaturated acid; (d) 0 to 19 wt.-% of at least one aromatic vinyl compound, and (e) 0 to 20 wt.-% of at least one further ethylenically unsaturated compound different from any of compounds (a) to (d), the weight percentages being based on the total amount of monomers, wherein the emulsion polymerization is conducted in presence of a degraded polysaccharide having a DE of 2 to 90 measured according to ISO 5377 (1981-12-15) to a method for making said polymer latex composition, to a curable polymer latex compound including said polymer latex composition, to a method for making dip molded latex films employing said curable polymer latex compound, to a film made from said polymer latex composition and to articles including said film or being coated with said polymer latex composition. 1. A polymer latex composition for dip-molding applications comprising the reaction product obtained by free-radical emulsion polymerization in aqueous medium of ethylenically unsaturated monomers comprising(a) 19.9 to 90 wt.-% of at least one aliphatic conjugated diene;(b) 9.9 to 80 wt.-% of at least one unsaturated nitrile;(c) 0.1 to 10 wt.-% of at least one ethylenically unsaturated acid;(d) 0 to 19 wt.-% of at least one aromatic vinyl compound, and(e) 0 to 20 wt.-% of at least one further ethylenically unsaturated compound different from any of compounds (a) to (d),the weight percentages being based on the total amount of monomers,wherein the emulsion polymerization is conducted in presence of a degraded polysaccharide having a DE of 2 to 90 measured according to ISO 5377 (1981-12-15).2. The polymer latex composition ...

Nitrile rubber composition, latex composition of highly saturated nitrile rubber, and cross-linked rubber

A nitrile rubber composition comprising a highly saturated nitrile rubber (A) containing α,β-ethylenically unsaturated nitrile monomer units in a ratio of 8 to 60 wt % and having an iodine value of 120 or less and an alkylated phenol compound (B), wherein a ratio of content of the alkylated phenol compound (B) with respect to a total of the highly saturated nitrile rubber (A) and the alkylated phenol compound (B) is 0.01 to 1 wt %, and a difference (η2−η1) between a plasticity number η2 after storage at 70° C. for 7 days in a state of an aqueous dispersion by being dispersed in water and a plasticity number η1 before the storage is 12 or less is provided.

VAPOR MITIGATION BARRIERS

Compositions for forming an improved vapor mitigation barrier are contemplated, such compositions being formed as an aqueous mixture of an asphalt component and a latex component, with the latex component including a chemically resistant latex, the chemically resistant latex being an acrylonitrile butadiene copolymer, an elastomeric fluoropolymer, or both. Such compositions, when cured and formed into a vapor mitigation barrier, may be seen to substantially mitigate diffusion of chlorinated hydrocarbons across the barriers. Also contemplated are methods for forming such vapor mitigation barriers, as well as vapor mitigation barrier products formed via the application of such compositions to various substrates. 1. A composition for mitigating diffusion of chlorinated hydrocarbons , the composition comprising from 30-80% by weight of an asphalt component , from 3% to 25% by weight of a latex component , and from 10% to 67% by weight of water;wherein the latex component comprises at least one chemically resistant latex selected from: an acrylonitrile butadiene copolymer, an elastomeric fluoropolymer, or combinations thereof.2. The composition of claim 1 , wherein the asphalt component has a particle size distribution D90 value of less than 25 microns.3. The composition of claim 1 , wherein the ratio of the asphalt component to the latex component is from 1:0.05 to 1:0.4 by weight.4. The composition of claim 1 , wherein in the latex component claim 1 , the selected chemically resistant latex comprises at least 5% of the latex component by weight.5. The composition of claim 1 , wherein in the latex component claim 1 , the selected chemically resistant latex comprises at least 25% of the latex component by weight.6. The composition of claim 1 , wherein in the latex component claim 1 , the selected chemically resistant latex comprises at least 50% of the latex component by weight.7. The composition of claim 1 , wherein the asphalt component comprises asphaltic bitumens.8. ...

PRIMER COMPOSITIONS

The present disclosure is drawn to primer compositions, which can include a binder including polyvinyl alcohol, starch nanoparticles, and a crosslinkable polyurethane dispersion. The primer competitions can also include a cationic salt and water. 1. A primer composition , comprising:5 wt % to 70 wt % of a binder including polyvinyl alcohol, starch nanoparticles, and a crosslinkable polyurethane dispersion;a cationic salt; andwater.2. The primer composition of claim 1 , wherein the primer composition is substantially devoid of crosslinking agent.3. The primer composition of claim 1 , wherein the cationic salt is present in an amount from 10 wt % to 40 wt % of all dry components of the primer composition.4. The primer composition of claim 1 , further comprising latex particles present in an amount from 10 wt % to 70 wt % of all dry components of the primer composition.5. The primer composition of claim 4 , wherein the polyvinyl alcohol claim 4 , the starch nanoparticles claim 4 , the crosslinkable polyurethane dispersion claim 4 , the latex particles claim 4 , and the cationic salt make up at least 80 wt % of all of dry components of the primer composition.6. The primer composition of claim 1 , wherein the polyvinyl alcohol is a mixture of two different polyvinyl alcohols with different weight-average molecular weights.7. The primer composition of claim 1 , wherein the primer composition is substantially devoid of inorganic pigments.8. The primer composition of claim 1 , wherein the primer composition further comprises an inorganic pigment in an amount of about 5 wt % or less of all dry components of the primer composition.9. The primer composition of claim 1 , wherein the polyvinyl alcohol has a degree of hydrolysis ranging from 75 mol % to 100 mol % claim 1 , and wherein hydroxyl groups on the polyvinyl alcohol interact with the cationic salt to form a complex.10. The primer composition of claim 1 , wherein the polyurethane dispersion is present in an amount from 1 ...

DIP-FORMING LATEX COMPOSITION AND DIP-FORMED ARTICLE

A latex for dip forming and a sulfur-based crosslinking agent, and has a pH of 9.5-11, the latex containing a copolymer having 40-80% by weight of conjugated diene monomer units (A) that contain a butadiene unit and an isoprene unit, 10-45% by weight of ethylenically unsaturated nitrile monomer units (B), and 2-15% by weight of ethylenically unsaturated acid monomer units (C), the ratio between the butadiene unit content and the isoprene unit content being 40:60 to 95:5 expressed in terms of weight. 1. A dip-forming latex composition comprising:a dip-forming latex containing a copolymer containing 40 to 80% by weight of conjugated diene monomer units (A) containing a butadiene unit and an isoprene unit, 10 to 45% by weight of ethylenically unsaturated nitrile monomer units (B), and 2 to 15% by weight of ethylenically unsaturated acid monomer units (C), the conjugated diene monomer units (A) containing the butadiene unit and the isoprene unit at a weight ratio of 40:60 to 95:5 (butadiene unit:isoprene unit); anda sulfur crosslinking agent, whereinthe dip-forming latex composition has a pH of 9.5 to 11.2. The dip-forming latex composition according to claim 1 , wherein the conjugated diene monomer units (A) are formed only of a butadiene unit and an isoprene unit.3. The dip-forming latex composition according to claim 1 , wherein the ethylenically unsaturated nitrile monomer units (B) are acrylonitrile units.4. The dip-forming latex composition according to claim 1 , wherein the ethylenically unsaturated acid monomer units (C) are ethylenically unsaturated monocarboxylic acid monomer units.5. The dip-forming latex composition according to claim 1 , wherein the ethylenically unsaturated acid monomer units (C) are methacrylic acid units.6. The dip-forming latex composition according to claim 1 , wherein the copolymer contains other monomer units (D) other than the conjugated diene monomer units (A) claim 1 , the ethylenically unsaturated nitrile monomer units (B) claim ...

Dip-formed article

Disclosed is a dip-formed article obtained by dip-molding a latex composition for dip-forming, which contains a crosslinking agent and a latex for dip-forming containing a copolymer composed of 40-80% by weight of conjugated diene monomer units (A) containing an isoprene unit, 20-45% by weight of ethylenically unsaturated nitrile monomer units (B), and 2-15% by weight of ethylenically unsaturated acid monomer units (C), and having a weight ratio of butadiene unit content to isoprene unit content that falls within the range of 60:40 to 100:0. Tear strength is at least 50 N/mm, tensile strength is at least 25 MPa, and oil swelling rate does not exceed 5%.

COLOR-STABLE NITRILE RUBBERS

What are provided are colour-stable, low-salt nitrile rubbers and a process for production thereof under specific conditions for the coagulation and/or washing of the nitrite rubber. Additionally obtainable are the corresponding volcanizable mixtures based on this nitrile rubber, a process for producing vulcanizates from these mixtures and the resultant vulcanizates having excellent processing properties. 2. The nitrile rubber according to claim 1 , wherein the aluminium index E is 3 ppm/MU to not more than 35 ppm/MU claim 1 , based on the nitrile rubber.3. The nitrile rubber according to claim 1 , additionally comprising repeat units of one or more further copolymerizable monomers.4. The nitrile rubber according to claim 1 , wherein the nitrile rubber is a copolymer of acrylonitrile and 1 claim 1 ,3-butadiene.5. The nitrile rubber according claim 1 , wherein the proportions of claim 1 , or the sum total of the conjugated dienes is in 20% to 95% by weight claim 1 , based on the nitrile rubber claim 1 , and the proportion of claim 1 , or the sum total of the α claim 1 ,β-unsaturated nitriles is 5% to 80% by weight claim 1 , based on the nitrile rubber claim 1 , where the proportions of all the monomers add up to 100% by weight in each case.6. A process for producing the nitrile rubbers according to claim 1 , by emulsion polymerization of at least one α claim 1 ,β-unsaturated nitrile monomer and at least one conjugated diene monomer claim 1 , the process comprising:(i) after the polymerization, coagulating the latex which contains the nitrile rubber using at least one salt, wherein the at least one salt comprises at least one aluminum salt, and the coagulation is effected at a pH of 1 to 4.5, preferably from 1 to 4, more preferably from 1 to 3.75 and especially from 1 to 3.5, and(ii) subsequently washing the nitrile rubber at a pH 6 to 12, preferably from 6.25 to 11, more preferably from 6.5 to 10.5 and especially from 6.75 to 10.57. The process for producing nitrile ...

METHOD FOR PRODUCING RUBBER WET MASTERBATCH AND METHOD FOR PRODUCING RUBBER COMPOSITION

A method for producing a rubber wet master batch is disclosed including: producing a carbon black-containing rubber latex solution by mixing carbon black, a dispersion solvent and a rubber latex solution; producing a carbon black-containing rubber coagulum by coagulating the thus-obtained carbon black-containing rubber latex solution; and producing a rubber wet master batch by dehydrating and drying the thus-obtained carbon black-containing rubber coagulum. With respect to this method for producing a rubber wet master batch, the carbon black satisfies conditions such that: the DBP oil absorption is 105-230 mL/100 g; STSA is 90-205 m/g; and the value obtained by subtracting the value of STSA from the value of DBP oil absorption is 15 or more. This method for producing a rubber wet master batch enables the achievement of a vulcanized rubber that has wear resistance and low heat generation properties. 1. A method for producing a rubber wet masterbatch which is yielded using at least carbon black , a dispersing solvent , and a rubber latex solution as raw materials ,the method comprising:a step (I) of producing a carbon black-containing rubber latex solution by mixing the carbon black, the dispersing solvent, and the rubber latex solution;a step (II) of producing a carbon black-containing rubber coagulated product by coagulating the resultant carbon black-containing rubber latex solution; anda step (III) of producing a rubber wet masterbatch by dehydrating and drying the resultant carbon black-containing rubber coagulated product,wherein the carbon black satisfies conditions in which:a dibutyl phthalate oil absorption is 105 mL/100 g or more and 230 mL/100 g or less;{'sup': 2', '2, 'a statistical thickness specific surface area is 90 m/g or more and 205 m/g or less; and'}a value obtained by subtracting a value of the statistical thickness specific surface area from a value of the dibutyl phthalate oil absorption is 15 or more.2. The method according to claim 1 , wherein ...

TIRE RUBBER COMPOSITION

Provide is a rubber composition for a tire that improves mechanical properties beyond conventional levels. The rubber composition for a tire according to an embodiment of the present invention contains from 1 to 50 parts by mass of oxidized cellulose nanofibers blended in 100 parts by mass of diene rubber containing 5% by mass or greater of modified diene rubber having 0.1% by mol or greater of a polar group. 1. A rubber composition for a tire comprising:from 1 to 50 parts by mass of oxidized cellulose nanofibers blended in 100 parts by mass of diene rubber containing 5% by mass or greater of modified diene rubber having 0.1% by mol or greater of a polar group.2. The rubber composition for a tire according to claim 1 , wherein the oxidized cellulose nanofibers contain from 0.5 to 3.0 mmol/g of a carboxy group.3. The rubber composition for a tire according to claim 1 , wherein the polar group is at least one selected from a carboxy group claim 1 , an acid anhydride group claim 1 , and an epoxy group.4. The rubber composition for a tire according to claim 1 , wherein when an interface between the diene rubber and the oxidized cellulose nanofibers is measured by a pulse NMR claim 1 , a relaxation time T2m of an intermediate component is from 50 to 100 μs when a relaxation time T2 component measured at 60° C. by a solid echo method is divided into three types.5. The rubber composition for a tire according to claim 2 , wherein the polar group is at least one selected from a carboxy group claim 2 , an acid anhydride group claim 2 , and an epoxy group.6. The rubber composition for a tire according to claim 2 , wherein when an interface between the diene rubber and the oxidized cellulose nanofibers is measured by a pulse NMR claim 2 , a relaxation time T2m of an intermediate component is from 50 to 100 μs when a relaxation time T2 component measured at 60° C. by a solid echo method is divided into three types.7. The rubber composition for a tire according to claim 3 , ...

RUBBER COMPOSITION, PNEUMATIC TIRE, METHOD FOR PRODUCING RUBBER WET MASTERBATCH, AND METHOD FOR PRODUCING RUBBER COMPOSITION

A rubber composition which contains carbon black, wherein the carbon black satisfies the following requirements: the 90-vol % particle diameter (D90) is 35 μm or smaller; and the degree of particle surface ruggedness expressed by the ratio of the area (μm) (A) of a projected image of a carbon black particle to the area (μm) (B) of a contour formed by surrounding the projected image of the carbon black particle by one line having a minimum length, (A)/(B), is 0.9 or less. The rubber composition of the present invention gives a vulcanized rubber having low heat build-up properties. 1. A rubber composition comprising carbon black , wherein the carbon black satisfies conditions in which:a 90-vol % particle diameter (D90) is 35 μm or less; and{'sup': 2', '2, 'a particle surface roughness degree represented by a ratio (A)/(B) of an area (μm) (A) of a projected image of a carbon black particle to an area (μm) (B) of a contour formed by surrounding the projected image of the carbon black particle by one line having a minimum length is 0.9 or less.'}2. The rubber composition according to claim 1 , wherein an amount of the carbon black is 10 to 120 parts by weight based on 100 parts by weight of a rubber component in the rubber composition.3. A pneumatic tire comprising the rubber composition according to .4. A method for producing a rubber wet masterbatch which is yielded using at least carbon black claim 1 , a dispersing solvent claim 1 , and a rubber latex solution as raw materials claim 1 ,the method comprising:a step (I) of producing a carbon black-containing rubber latex solution by mixing the carbon black, the dispersing solvent, and the rubber latex solution;a step (II) of producing a carbon black-containing rubber coagulated product by coagulating the resultant carbon black-containing rubber latex solution; anda step (III) of producing a rubber wet masterbatch by dehydrating and drying the resultant carbon black-containing rubber coagulated product,wherein the carbon ...

Crosslinkable rubber composition and crosslinked rubber product

A crosslinkable rubber composition includes a carboxyl group-containing highly saturated nitrile copolymer rubber, and silica treated with silicone oil.

AN ELASTOMERIC COMPOSITION

The present application relates to a crosslinked composition. The composition comprises an elastomer, a silane compound, a liquid fluorocarbon and a crosslinker, preferably an epoxy silane. The crosslinked composition may be used in the production of any elastomeric article manufactured through a dipping process, such as a glove. 2. The composition according to claim 1 , comprising 0.5 to 10% weight of the crosslinker.3. The composition according to claim 1 , wherein the crosslinker is an epoxy silane.4. The composition according to claim 3 , wherein the epoxy silane is [3-(2 claim 3 ,3-epoxypropoxy)propyl]trimethoxysilane or β(3 claim 3 ,4-epoxycyclohexyl)-ethyltriethoxysilane.5. The composition according to claim 4 , wherein [3-(2 claim 4 ,3-epoxypropoxy)propyl]trimethoxysilane comprises 0.3 to 1% weight of methanol.6. The composition according to claim 1 , comprising 1 to 5% weight of the silane compound.7. The composition according to claim 1 , wherein the silane compound comprises silicon dioxide and 2-amino-2 methylpropanol claim 1 , surfactant and dispersant claim 1 , and water.8. The composition according to claim 7 , comprising 10 to 30% weight of silicon dioxide claim 7 , 1 to 3% weight of 2-amino-2-methylpropanol claim 7 , 2 to 5% weight of liquid surfactant claim 7 , and 62 to 87% weight of water.9. The composition according to claim 1 , comprising 0.5 to 15% weight of liquid fluorocarbon.10. The composition according to claim 1 , wherein the liquid fluorocarbon comprises liquid fluorocarbon claim 1 , liquid emulsifier claim 1 , dipropylene glycol claim 1 , acetic acid claim 1 , and water.11. The composition according to claim 10 , wherein the liquid fluorocarbon comprises 25 to 30% weight of liquid fluorocarbon and liquid emulsifier claim 10 , 8 to 12% weight of dipropylene glycol claim 10 , 0.1 to 0.2% weight of acetic acid claim 10 , and 57.8 to 66.9% weight of water.12. The composition according to claim 1 , wherein the liquid fluorocarbon is ...

Electrode Binder Composition for Secondary Battery Electrode and Electrode Mixture Including the Same

Provided are a binder composition for a secondary battery electrode, and an electrode mixture including the same, and more particularly, a binder composition for a secondary battery electrode capable of providing excellent binding strength for an active material and an electrode while having excellent latex stability, thereby improving performance of a secondary battery, and an electrode mixture including the same.

Elastomeric film-forming compositions and articles made from the elastomeric film

The invention relates to an elastomeric film-forming composition comprising (a) a copolymer formed from monomers consisting of chlorobutadiene and an ethylenically unsaturated carboxylic acid or ester, and (b) one or more cross-linking agents. The invention also relates to dipped articles, gloves, methods of manufacture and uses involving the composition.

Elastomeric film-forming compositions and articles made from the elastomeric film

The invention relates to an elastomeric film-forming composition comprising a carboxylic acid- or ester-grafted polychlorobutadiene, and one or more cross-linking agents. The invention also relates to dipped articles, gloves, methods of manufacture and uses involving the composition.

Crosslinking agent, polymer composition containing crosslinking agent, and crosslinked product of same

A crosslinking agent which is based on an aluminate complex salt of a hydroxyl group-containing organic compound, which crosslinks a carboxy group and a nitrile group. When the crosslinking agent is added to a carboxy group-denatured NBR latex, gloves having flexibility and a strength comparable to those of natural rubber gloves can be manufactured. Furthermore, the excellent creep resistance is a big characteristic. Moreover, unlike normal sulfur vulcanization gloves, the gloves do not contain sulfur and a vulcanization accelerator, and do not necessarily require addition of zinc oxide.

丁腈橡胶胶乳的氢化

本发明涉及一种用于在乳化剂的存在下使用氢化催化剂氢化丁腈橡胶中的碳‑碳双键的方法，该丁腈橡胶以胶乳形式存在，这意味着作为丁腈橡胶颗粒在水性介质中的悬浮液。

Latex composition for dip-forming

본 발명에 의한 딥 성형용 라텍스 조성물 및 이로부터 제조된 딥 성형 니트릴 장갑은 딥 성형용 라텍스에 나노 입자의 산화아연을 포함함으로써 장갑 제작 작업성이 좋으면서 300% 모듈러스가 낮아 착용감이 우수하고 인장강도는 높아 얇아도 잘 찢어지지 않는 효과를 가진다. 또한 pH 조절제의 양을 적게 사용하면서도 딥 성형용 조성물의 pH를 안정적으로 유지할 수 있어 장갑 제작 공정의 효율을 높일 수 있다. The latex composition for dip molding according to the present invention and the dip-molded nitrile glove produced therefrom are excellent in wearing workability due to the incorporation of nanoparticles of zinc oxide in the latex for deep molding and have a low modulus of 300% Has a high tearing effect even if it is thin. In addition, since the pH of the composition for dip molding can be stably maintained while the amount of the pH adjusting agent is reduced, the efficiency of the glove making process can be increased.

Nitrile rubber latex composites

본 발명은 중합 반응중 개시제에 의한 pH 변화가 적고 열안정성 및 광안정성이 우수하며 재현성 있는 입자 크기를 가진 니트릴 고무 라텍스를 제조하기 위한 조성물 및 이로부터 니트릴 고무 라텍스를 제조하는 방법에 관한 것으로, 니트릴계 단량체와 디엔 단량체를 주성분으로 하는 니트릴계 고무 라텍스 조성물에 있어서, 총 단량체에 대해 α-알킬 방향족 화합물 또는 알킬아크릴레이트 화합물의 이합체로 이루어진 반응조절제 0.01-5 중량%, 염화나트륨, 탄산수소나트륨, 인산나트륨, 염화칼륨, 탄산수소칼륨, 탄산칼륨 및 인산칼륨으로부터 선택된 적어도 2종의 전해질로 이루어진 pH 안정제 0.3-2 중량% 및 중합억제제 0.2 중량% 이하를 포함하는 것을 특징으로 한다. The present invention relates to a composition for producing a nitrile rubber latex having a small pH change by the initiator during the polymerization reaction, excellent thermal stability, light stability, and reproducible particle size, and a method for producing a nitrile rubber latex therefrom. In a nitrile rubber latex composition containing a monomer based on a diene monomer and a diene monomer, 0.01-5% by weight of a reaction regulator composed of a dimer of an α-alkyl aromatic compound or an alkylacrylate compound, sodium chloride, sodium bicarbonate, and phosphoric acid, based on the total monomers. It is characterized by comprising a pH stabilizer 0.3-2% by weight and at least 0.2% by weight of a polymerization inhibitor consisting of at least two electrolytes selected from sodium, potassium chloride, potassium hydrogen carbonate, potassium carbonate and potassium phosphate.

A latex composition for dip-forming comprising carboxylated nitrile based copolymer latex

본 발명은 딥 성형용 라텍스 조성물에 관한 것으로서, 구체적으로는 카르본산 변성 니트릴계 공중합체 라텍스에 황 및 가황촉진제 대신에 스티렌 함량이 25 ~ 40 중량%인 스티렌 부타디엔 스티렌 블록 폴리머 유화액을 특정 함량으로 첨가한 딥 성형용 라텍스 조성물에 관한 것이다. 따라서 상기 라텍스 조성물을 통해 얻은 딥 성형물은 황 및 가황촉진제를 포함하지 않아 인체에 무해하면서도, 기계적 물성이 종래와 동등 또는 그 이상이고 촉감이 부드러운 특징이 있다. More specifically, the present invention relates to a latex composition for dip molding, and more particularly to a latex composition for dip molding, which is obtained by adding a styrene-butadiene styrene block polymer emulsion having a styrene content of 25 to 40% by weight to a carboxylic acid-modified nitrile- To a latex composition for deep molding. Therefore, the dip molding obtained through the latex composition does not contain sulfur and a vulcanization accelerator, and is harmless to the human body, but has mechanical properties equal to or more than those of conventional ones, and soft touch.

딥 성형용 라텍스 조성물 및 이로부터 제조된 딥 성형품

본 발명은 2종의 서로 상이한 카르본산 변성 니트릴계 공중합체 라텍스를 포함하는 딥 성형용 라텍스 조성물 및 이로부터 제조된 땀에 대한 내구성이 우수하며 인장강도 및 신장율이 높은 딥 성형품에 관한 것이다. 이에 따른, 딥 성형용 라텍스 조성물은 인장강도, 신장율, 응력 및 내구성이 모두 우수할 수 있어 이를 필요로 하는 산업, 예컨대 고무장갑산업 등에 용이하게 적용할 수 있다.

Nitrile rubber gloves containing extensibility regulator

Hydrolysis-resistant polyamide-elastomer mixtures, articles moulded therefrom and use thereof

FIELD: chemistry.SUBSTANCE: invention relates to polyamide-elastomer mixtures for making moulded articles. The polyamide-elastomer mixture contains components in the following ratios, wt %: a) 30 to 95 of at least one partially crystalline polyamide having a solution viscosity greater than or equal to 1.75 (measured in m-cresol solution, 0.5 wt %, 20°C.), b) 5 to 50 of at least one elastomer produced by emulsion polymerisation of at least one conjugated diene, at least one ?,?-unsaturated nitrile and, optionally, one or more additional copolymerisable monomers and subsequent spray drying of the latex obtained during emulsion polymerisation, c) optionally, 0 to 20 of one or more polyamides having a solution viscosity of less than 1.75 (measured in m-cresol solution, 0.5 wt %, 20°C.), relative to the total amount of components (a) to (c), and relative to 100 parts by weight of components (a) to (c), from 0 to 100 parts by weight of one or more additives. The disclosed polyamide-elastomer mixtures can be processed into moulded articles which are used, for example, in the motor car industry, particularly as channel conducting media.EFFECT: good flexibility of polyamide-based materials and improved resistance to hydrolysis and oil swell.33 cl, 4 dwg, 2 tbl, 1 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 485 149 (13) C2 (51) МПК C08L C08L C08L C08L C08L C08L C08J ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ 77/00 (2006.01) 77/02 (2006.01) 9/02 (2006.01) 9/04 (2006.01) 21/00 (2006.01) 13/02 (2006.01) 3/12 (2006.01) ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010137320/05, 06.02.2009 (24) Дата начала отсчета срока действия патента: 06.02.2009 Приоритет(ы): (30) Конвенционный приоритет: 08.02.2008 DE 102008008098.5 25.09.2008 DE 102008042368.8 (43) Дата публикации заявки: 20.03.2012 Бюл. № 8 (45) Опубликовано: 20.06.2013 Бюл. № 17 2 4 8 5 1 4 9 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 08.09.2010 C 2 C 2 (56) Список документов, ...

Latex composition for dip-forming and the product prepared thereby

본 발명은 딥 성형용 라텍스 조성물 및 이로부터 제조된 성형품에 관한 것으로, 보다 구체적으로 카르본산 변성 니트릴계 공중합체 라텍스와 함께 황 및 가황촉진제 대신 알칼리 가교제를 혼합 사용함으로써 가교화를 통해 딥 성형품의 내구성, 내화학성 및 인장강도를 향상시킨다. The present invention relates to a latex composition for dip molding and a molded article prepared therefrom. More specifically, durability of the dip molded article through crosslinking is achieved by using an alkali crosslinking agent instead of sulfur and a vulcanization accelerator together with a carboxylic acid-modified nitrile copolymer latex. Improve chemical resistance and tensile strength.

Semi transparent nitrile glove

A semi transparent nitrile glove without pigment and/or without titanium dioxide comprising of nitrile latex, aqueous alkaline solutions, accelerators, vulcanizing agents, stabilizer and antifoaming agent, wherein the nitrile latex is any one selected from either acrylonitrile butadiene copolymer or carboxylated acrylonitrile butadiene copolymer, wherein the aqueous alkaline solutions are combination of either potassium hydroxide and ammonia or sodium hydroxide and ammonia, wherein the accelerators are chemical compounds of dithiocarbamates, wherein the vulcanizing agents are selected from both ionic and covalent vulcanizing agents, wherein the stabilizer is any one of either sodium dodecylbenzene sulfonate or sodium dodecyl sulfate and wherein the antifoaming agent is any one from a group consisting of silicone based antifoam, non-silicone based antifoam, oil based antifoam and water based antifoam.

공액디엔계 공중합체 조성물, 이의 제조방법 및 이를 포함하는 고무 조성물

본 발명은 공액디엔계 공중합체 조성물에 관한 것으로, 보다 상세하게는 공액디엔계 공중합체 조성물, 이의 제조방법 및 이를 포함하는 고무 조성물에 관한 것으로, 각각 방향족 비닐 단량체 유래 반복단위, 공액디엔계 단량체 유래 반복단위, 및 히드록시 알킬 (메트)아크릴레이트 단량체 유래 반복단위를 포함하는 제1 공액디엔계 공중합체 및 제2 공액디엔계 공중합체를 포함하고, 상기 제1 공액디엔계 공중합체는 히드록시 알킬 (메트)아크릴레이트 단량체 유래 반복단위를 0.01 중량% 내지 1 중량%로 포함하고, 상기 제2 공액디엔계 공중합체는 히드록시 알킬 (메트)아크릴레이트 단량체 유래 반복단위를 4.5 중량% 내지 6.5 중량%로 포함하는 것인 공액디엔계 공중합체 조성물을 제공한다.

Conjugated diene-based copolymer composition, method for producing the same, and rubber composition containing the same

Nano-sized hydrogenated diene-based latex particles

The present invention relates to hydrogenated nano-sizcd diene-based latex particles, a method for their production and their use.

Nano-sized diene-based polymer latex particles

The present invention refers to diene-based unsaturated polymer latex particles having a particle size measured as d 90 -value of less than 60nm and a method for their production.

카르본산 변성 니트릴계 공중합체 라텍스 조성물 및 이를 포함하는 딥 성형용 조성물

본 발명은 인장강도, 신장율, 응력 및 내구성이 우수한, 불포화 실란 화합물 및 산화억제제를 포함하는 카르본산 변성 니트릴계 공중합체 라텍스 조성물, 이로부터 제조된 카르본산 변성 니트릴계 공중합체 라텍스 및 이를 포함하는 딥 성형용 라텍스 조성물에 관한 것이다. 이에 따른, 카르본산 변성 니트릴계 공중합체 라텍스 조성물은 인장강도, 신장율, 응력 및 내구성이 모두 우수할 수 있으며, 이에 상기 카르본산 변성 니트릴계 공중합체 라텍스 조성물로부터 제조된 카르본산 변성 니트릴계 공중합체 라텍스 및 이를 이용한 딥 성형품은 이를 필요로 하는 산업, 예컨대 고무장갑산업 등에 용이하게 적용할 수 있다.

합성고무 라텍스 수지 조성물 및 이것이 코팅된 면장갑

본 발명은 합성고무 라텍스 수지 조성물 및 이것이 코팅된 면장갑에 대한 것으로, 특히 합성고무 라텍스를 주성분으로 하고, 점증제로서 아크릴 에멀젼과, 폴리아크릴산나트륨을 포함하는 라텍스 수지 조성물이다. 이러한 본 발명은 점성이 높은 아크릴 에멀젼이 폴리아크릴산나트륨에 의해 입자 크기가 커지고 분자길이도 길어짐으로써, 면 장갑에 코팅하는 경우 면 직물 사이로 합성고무 라텍스가 스며들지 않도록 해 주고, 별도의 방수제나 발수제(응고제)에 의한 전처리 코팅 없이도, 우수한 땀 흡수성과, 내유성, 그립성, 굴곡성 등을 고르게 만족시킬 수 있는 라텍스 코팅 면 장갑을 간단하고 용이하게 제조할 수 있다.

Method for preparing compositions for dipforming dipforming product and mehtod for preparing thereof

본 발명은 딥 성형용 조성물의 제조방법, 딥 성형품 및 그 제조 방법에 관한 것으로서, 본 발명에 따르면, 황 및 가황 촉진제를 미사용하면서 딥 성형품을 제조할 수 있는 조성물을 제공함과 동시에 딥 성형품 제조 공정 중의 긴 교반 숙성 공정을 생략하여 생산성을 높이고, 종래의 황 및 가황 촉진제가 유발하는 부작용에 의한 문제점을 해결할 수 있다. According to the present invention, there is provided a composition capable of producing a dip-molded article while the sulfur and the vulcanization accelerator are not used, and at the same time, it is possible to provide a composition for dip- It is possible to omit the long stirring aging step to increase the productivity and solve the problems caused by the side effects caused by the conventional sulfur and vulcanization accelerator.

Preparation method of butyronitrile wig bubble anti-slip gloves

本发明涉及一种丁腈假发泡防滑手套的制备方法，通过向丁腈胶乳中加入与丁腈胶乳相容性很差的石蜡油增塑剂，石蜡油增塑剂的添加量为2.4％～12.2％的丁腈胶乳质量。本方案一方面运用增塑剂所具备的能增加橡胶制品柔软度、耐油性和耐磨性的特点，另一方面利用与丁腈相容性差的特点，使石蜡油增塑剂在丁腈胶浆中形成一定占位的作用，并在加热预硫化离析或渗出，在手套胶面形成不同程度的小坑状结构，一定程度上增加手套胶面的粗糙度，增强其抓握防滑性。由于这些小坑状结构虽然也具有增加丁腈手套柔软度的特点，但其不同于发泡胶浆形成的连通的发泡孔，因此在耐水性和耐油性上不会被削弱，是一种近似发泡但实质并未发泡的“假发泡”丁基橡胶手套。

纳米尺寸的基于二烯的聚合物胶乳粒子

本发明涉及具有以d 90 ‑值测量的粒径小于60nm的基于二烯的不饱和聚合物胶乳粒子及其生产方法。还公开了在减少凝胶形成的情况下用于将基于二烯的胶乳用作橡胶的方法以及用于转化为氢化聚合物的方法。

Rubberized coal tar pitch emulsion

Improved rubberized coal tar emulsion compositions especially suitable for sealing bituminous pavement compositions, such as asphalt pavement compositions. A composition according to the invention comprises a major portion of a prepared coal tar pitch emulsion and water, having admixed therewith a small amount of an acrylonitrile/butadiene copolymer latex having an extraordinarily small particle size. Preferred compositions additionally include a silicone resin. The compositions further include an appropriate aggregate filler material such as sand. Compositions according to the invention are characterized by a thixotropic nature and the ability to maintain an aggregate in matrix like suspension. A film cast from such compositions applied as a sealing coat to an asphalt pavement is characterized by long life, uniform filler distribution, and excellent bonding characteristics.

Water based coal tar emulsions

Water-based coal tar emulsions are described which are prepared from a blend comprising coal tar, water, acrylonitrile-butadiene copolymer powders and clay. After the emulsion is prepared from the blend, a rubber latex may be added to the emulsion. Films obtained from the emulsions exhibit desirable elongation and tensile properties.

Stable fine-particle suspensions of functionalised, wholly or partially hydrated nitrile rubbers

Aqueous suspension of a carboxyl group containing, completely or partially hydrogenated nitrile rubber with an emulsifier content of maximum 1 part by weight, is claimed, where the nitrile rubber in the suspension has an average particle diameter of 0.01-0.9 (preferably 0.08-0.5) mu m, as measured by dynamic light scattering. Independent claims are included for: (1) a process for preparing the aqueous suspension of the nitrile rubber, comprising dissolving the nitrile rubber in an organic solvent to form an organic phase, contacting the organic phase with an aqueous phase having a pH of at least 6, preferably 9-13, where the water in the organic solvent is completely or partially dissolved, and the nitrile rubber is precipitated to form a suspension, and completely or partially removing the organic solvent; (2) a process for coating substrates, preferably plastics, metals or fibers, such as glass fibers, metal fibers or organic synthetic fibers, fibers from polyesters, aliphatic and/or aromatic polyamides or polyvinyl alcohol, comprising contacting the aqueous suspension with the substrates; (3) a binder composition comprising the aqueous suspension, a mixture containing resin and/or curing agent, preferably resorcinol-formaldehyde, resorcinol-chlorophenol/formaldehyde, isocyanates, blocked isocyanates and/or urea derivatives, and optionally one or more other rubber additives, preferably crosslinking agents, crosslinking accelerators and fillers, such as carbon black or mineral filler; (4) the coated substrate, obtained by the above process; (5) a process for producing composite materials, comprising embedding and vulcanizing the coated substrate in a mixture of one or more further rubbers and auxiliary agents, where the rubber is natural rubber, butadiene rubber, styrene-butadiene rubber, ethylene propylene monomer rubber, ethylene propylene diene monomer rubber, epichlorohydrin rubber, ethylene vinylacetate monomer rubber, chlorosulfonated polyethylene synthetic ...

Carbonic acid modified nitrile based copolymer latex composition and composition for dip molding

본 발명은 가교성 작용기로 아자이드기가 첨가된 화합물을 포함함으로써 교반 숙성 공정이 필요 없고, 알레르기 반응도 일으키지 않으면서도, 최종 제조된 성형품은 종래와 동등하거나 유사한 정도의 내유성과 기계적 강도, 사람의 땀에 대한 내구성 및 부드러운 촉감을 가지는 딥 성형용 카르본산 변성 니트릴계 공중합체 라텍스 및 이를 포함하는 딥 성형용 라텍스 조성물에 관한 것이다. The present invention includes a compound having an azide group added thereto as a crosslinkable functional group, thereby eliminating the need for a stirring and aging step, and even when an allergic reaction is not caused, the final molded article has oil resistance and mechanical strength equivalent to or similar to conventional ones, And a latex composition for dip molding comprising the carboxylic acid-modified nitrile-based copolymer latex for dip-molding.

Article containing both thermoplastic and elastomer

본 발명은 탄성중합체, 열가소성 물질, 촉진제, 소포제, 항산화제, 가교제, 착색제, 계면활성제, 충전제, pH 조정제 및 분산 매질을 포함하는 라텍스 제제에 관한 것이며, 여기서, 라텍스 제제는 5 중량% 내지 40 중량% 범위의 총 고형분 함량을 가진다. 나아가, 본 발명은 열가소성 물질과 탄성중합체를 모두 포함하는 장갑을 제조하기 위한 라텍스 제제의 제조 방법을 개시하며, 상기 방법은 탄성중합체를 열가소성 물질과 배합하여, 열가소성 물질과 탄성중합체를 모두 포함하는 분산액을 생성하고, 상기 열가소성 물질과 탄성중합체를 모두 포함하는 분산액을 교반하는 단계, 특정한 순서 없이 하나씩 교반하면서 촉진제, 소포제, 항산화제, 가교제, 착색제, 계면활성제 및 충전제, 뒤이어 pH 조정제를 상기 열가소성 물질과 탄성중합체를 모두 포함하는 분산액에 첨가하여, 라텍스 제제를 생성하는 단계, 및 상기 라텍스 제제를 계속 교반하고 상기 라텍스 제제를 숙성시키는 단계로서, 여기서, 라텍스 제제의 총 고형분 함량은 상기 라텍스 제제로의 분산 매질의 첨가에 의해 5 중량% 내지 40 중량%로 조정되고 라텍스 제제의 pH 범위는 9 내지 11로 조정되는, 단계를 포함한다.

High elastic polyvinyl chloride composition and objects prepared by the same

본 발명은 복수개의 폴리염화비닐 1차 입자가 결합하여 형성된 폴리염화비닐 2차 입자 및 고무 입자를 포함하는 폴리염화비닐-고무 입자를 포함하며, 상기 폴리염화비닐-고무 입자에서 상기 고무 입자가 상기 폴리염화비닐 2차 입자를 형성하는 폴리염화비닐 1차 입자들 사이의 공극에 충진되어 있는 것을 특징으로 하는 고탄성 폴리염화비닐 조성물을 제공한다. The present invention includes polyvinyl chloride-rubber particles including polyvinyl chloride secondary particles and rubber particles formed by combining a plurality of polyvinyl chloride primary particles, wherein the rubber particles in the polyvinyl chloride-rubber particles are Provided is a high elastic polyvinyl chloride composition, characterized in that it is filled in the voids between the polyvinyl chloride primary particles forming the polyvinyl chloride secondary particles. 본 발명의 폴리염화비닐 조성물을 이용하여 제조된 필름은 탄성이 매우 우수하고, 필름 내의 고무 입자의 균일도가 뛰어나다. 본 발명의 폴리염화비닐 조성물은 또한 상기 고무 입자에 가교 전처리를 함으로서 연신율이 우수하면서도 동시에 인장강도가 크며, 필름을 성형할 때 가소제 사용량을 증량하지 않아도 점도 증가가 없어 가공성이 우수하다. The film produced using the polyvinyl chloride composition of the present invention has excellent elasticity and excellent uniformity of rubber particles in the film. The polyvinyl chloride composition of the present invention is also excellent in elongation and high tensile strength by crosslinking pretreatment to the rubber particles, and excellent in workability because there is no increase in viscosity without increasing the amount of plasticizer used when forming a film. 폴리염화비닐, 고무 입자, 가교 처리, 고탄성, 가공 점도 Polyvinyl chloride, rubber particles, crosslinking treatment, high elasticity, processing viscosity

Process for producing enlarged latex

응집에 의해 라텍스를 확대함으로써 확대 라텍스를 제조하는 방법으로, 하기를 특징으로 하는 방법: A process for producing an expanded latex by expanding the latex by agglomeration, characterized by the following: (1) (a) 음이온성 계면활성제 및 (1) (a) anionic surfactants and (b) 양이온성 계면활성제 및 양쪽성 계면활성제로 구성된 군으로부터 선택된 하나 이상의 계면활성제를 라텍스 중에 존재하게 하고,     (b) at least one surfactant selected from the group consisting of cationic surfactants and amphoteric surfactants is present in the latex, (2) 응집 및 확대제로서, 하기로 구성된 군으로부터 선택된 하나 이상을 상기 계면활성제 존재하에서 라텍스에 첨가하고, (2) adding at least one selected from the group consisting of to the latex in the presence of the surfactant as a flocculating and expanding agent, (ⅰ) 무기산, (Iii) inorganic acids, (ⅱ) 유기산, (Ii) organic acids, (ⅲ) 물 중에서 산을 형성하는 물질, (Iii) substances that form acids in water, (ⅳ) 서로 반응하여 산을 형성하는 둘 이상의 물질의 조합, 및 (Iii) a combination of two or more substances that react with each other to form an acid, and (ⅴ) 활성 방사선에의 노출에 의해 산을 형성하는 물질, (Iii) a substance that forms an acid by exposure to actinic radiation, (3) 응집 및 확대제로부터 유래된 산을 라텍스상에서 작용하게 하고, 그로 인해 라텍스의 입자 직경을 확대시킴; 수득되는 확대 라텍스; 중합될 수 있는 단량체와 확대 라텍스를 중합하여 수득되는 그래프트 공중합체; 그래프트 공중합체 및 열가소성 수지를 함유하는 수지 조성물. (3) the acid derived from the flocculating and expanding agent acts on the latex, thereby expanding the particle diameter of the latex; Expanded latex obtained; Graft copolymers obtained by polymerizing monomers that can be polymerized with expanded latex; Resin composition containing a graft copolymer and a thermoplastic resin.

Latex composition for dip-forming and dip-formed article produced therefrom

본 발명은 카르본산 변성 니트릴계 공중합체 라텍스; 및 스티렌계 고분자 유화제;를 포함하는 딥 성형용 라텍스 조성물 및 이로부터 제조된 딥 성형품에 관한 것으로서, 카르본산 변성 니트릴계 공중합체 라텍스와 스티렌계 고분자 유화제를 혼합하여 사용함으로써 시너리시스(syneresis) 시간을 늘릴 뿐만 아니라 계면활성제를 첨가하는 기존의 라텍스 조성물 보다 거품발생을 감소시켜 공정 작업성이 우수한 효과가 있다. The present invention relates to a carboxylic acid-modified nitrile-based copolymer latex; And a styrenic polymer emulsifier and a dip molded product produced therefrom, wherein a syneresis time is obtained by mixing a carboxylic acid modified nitrile-based copolymer latex with a styrenic polymer emulsifier There is an effect of reducing the generation of foams as compared with the conventional latex composition in which a surfactant is added, and thus the processability is excellent.

Glove and glove composition

Nitrile rubber article having natural rubber characteristics

탄성 니트릴 고무 물품의 제조를 위한 개선된 방법 및 재료가 개시되어 있다. 특히, 상기 방법 및 재료 제형물은, 니트릴 고무의 인장 강도 특성을 유지하면서, 천연 고무 라텍스 물품과 비슷한 힘-변형 특성을 나타내는 니트릴 고무계 물품을 생성할 수 있다. 상기 방법은 예비 경화 단계에서 디티오카르바메이트, 티아졸, 및 구아니딘 화합물을 갖는 촉진제 조성물을 포함한다. 또한, 본 발명은 상기 방법에 의해 제조된 탄성 니트릴 고무 제품, 예컨대 실험용, 수술용, 또는 작업용 장갑을 포함한다. Improved methods and materials for the production of elastic nitrile rubber articles are disclosed. In particular, the method and the material formulation can produce a nitrile rubber-based article exhibiting a force-strain characteristic similar to that of a natural rubber latex article, while maintaining the tensile strength characteristics of the nitrile rubber. The process comprises an accelerator composition having a dithiocarbamate, a thiazole, and a guanidine compound in a pre-curing step. The present invention also encompasses elastic nitrile rubber articles produced by the method, such as laboratory, surgical, or work gloves.

Latex composition for dip-forming, method for preparing the composition and article formed by the composition

본 발명은 딥 성형용 라텍스 조성물에 관한 것으로, 보다 상세하게는 카르본산 변성 니트릴계 공중합체 라텍스 및 소수성으로 개질된 알칼리 용해성 에멀젼 증점제를 포함하는 딥 성형용 라텍스 조성물에 있어서, 상기 소수성으로 개질된 알칼리 용해성 에멀젼 증점제는 회합부 및 비회합부를 포함하는 공중합체를 포함하고, 상기 회합부는 탄소수 8 내지 탄소수 15의 알킬, 알케닐, 퍼플루오로알킬 및 카르보실릴과, 탄소수 6 내지 탄소수 15의 아릴, 아릴알킬, 아릴알케닐, 지환족 알킬 및 다환족 알킬로 이루어진 군으로부터 선택된 1종 이상의 제1 소수성기가 치환된 단량체 유래 반복단위를 포함하는 것인 딥 성형용 라텍스 조성물, 이의 제조방법 및 이로부터 제조된 성형품을 제공한다. The present invention relates to a latex composition for dip molding, and more particularly, in the latex composition for dip molding comprising a carboxylic acid-modified nitrile-based copolymer latex and a hydrophobically modified alkali-soluble emulsion thickener, the hydrophobically modified alkali The soluble emulsion thickener comprises a copolymer comprising an associative and non-associated moiety, wherein the associative moiety comprises an alkyl, alkenyl, perfluoroalkyl and carbosilyl having 8 to 15 carbon atoms, an aryl having 6 to 15 carbon atoms, A latex composition for dip molding comprising a repeating unit derived from a monomer substituted with at least one first hydrophobic group selected from the group consisting of arylalkyl, arylalkenyl, alicyclic alkyl and polycyclic alkyl, method for preparing the same, and preparation thereof molded products are provided.

High impact polyamide resin composition and method thereof

본 발명은 충격강도가 뛰어난 폴리아마이드 수지 조성물 및 이의 제조방법에 관한 것으로, 보다 상세하게는 a) 폴리아마이드 50 내지 85 중량%; b) 충격 보강제 5 내지 20 중량%; c) 계면 접착력 강화용 첨가제 0.05 내지 10 중량%; 및 d) 유리섬유 10 내지 30 중량%;를 포함하여 이루어지는 것을 특징으로 하는 폴리아마이드 수지 조성물 및 이의 제조방법에 관한 것이다. 본 발명에 따르면, 유리섬유 및 계면 접착력 강화용 첨가제를 포함하여 기계적 강도, 내열성 및 가공성이 우수하고, 특히 상온 및 저온에서의 충격강도가 뛰어나 자동차, 전기/전자, 산업재 및 레저용품의 부품 소재로 적합한 폴리아마이드 수지 조성물 및 이의 제조방법을 제공하는 효과가 있다. 열가소성 수지, 충격강도, 내열성, 충격 보강제, 유리섬유, 계면 접착력 강화용 첨가제

A tyre having a running tread

본 발명은 적어도 부분적으로, (i) 디엔 탄성중합체, (ii) 강화 충전제로서의 무기 충전제 50phr 이상, (iii) 2 내지 15phr의 커플링제(무기 충전제/디엔 탄성중합체), (iv) 1 내지 10phr의 메틸렌 수용체 및 (v) 0.5 내지 5phr의 메틸렌 공여체를 기본으로 하는 고무 조성물(여기서, phr은 탄성중합체 100부당 중량부이다)로 이루어진 타이어 주행 트레드에 관한 것이다. 당해 주행 트레드는 타이어에 예정되어 있는 기계적인 파괴[자동-적응(auto-accommodation)] 후에, 주행 트레드의 표면으로부터 내부로 방사상으로 증가하는 강성 구배를 갖는다. 또한, 본 발명은 이러한 주행 트레드의 타이어 제조용 또는 타이어 재생용으로서의 용도에 관한 것이기도 하다. 추가로, 본 발명은 이러한 주행 트레드를 포함하는 타이어, 특히 동절기용 또는 빙판용(겨울용 타이어) 타이어에 관한 것이다. The present invention, at least in part, includes (i) diene elastomer, (ii) at least 50 phr of inorganic filler as reinforcing filler, (iii) 2 to 15 phr coupling agent (inorganic filler / diene elastomer), (iv) 1 to 10 phr A tire running tread consisting of a methylene acceptor and (v) a rubber composition based on a methylene donor of 0.5 to 5 phr, where phr is parts by weight per 100 parts of elastomer. The running tread has a stiffness gradient radially increasing inward from the surface of the running tread after mechanical breakdown (auto-accommodation) that is intended for the tire. The invention also relates to the use of such a running tread for tire production or tire regeneration. In addition, the present invention relates to a tire comprising such a running tread, in particular a tire for winter or ice (winter tires). 트레드, 고무 조성물, 강화 충전제, 메틸렌 수용체, 메틸렌 공여체, 커플링제, 승용차, 동절기용 타이어. Treads, rubber compositions, reinforcing fillers, methylene acceptors, methylene donors, coupling agents, passenger cars, winter tires.

Golf ball and its preparation

Latex resin composition for dip forming and a method for preparing dip formed articles using therof

본 발명은 딥 성형용 라텍스 수지 조성물 및 이를 이용한 딥 성형물 제조 방법에 관한 것으로, 황 및 가황 촉진제를 사용하지 않고도 케토-하이드라자이드 반응을 일으킬 수 있는 3종의 화합물을 투입시기를 조절하면서 사용하여 자기가교가 가능한 고무장갑용 라텍스 수지 조성물을 제공하고, 이로부터 딥 성형물을 제공할 수 있다. 본 발명에 따르면, 황 및 가황 촉진제를 사용하여 수반되는 생산성 저하를 방지할 뿐 아니라 황 및 가황 촉진제에 의해 유발되는 부작용에 의한 문제점도 해결할 수 있는 이점을 갖는다. The present invention relates to a latex resin composition for dip molding and a method of producing a dip molding using the latex resin composition, wherein three kinds of compounds capable of causing a keto-hydrazide reaction without using sulfur and a vulcanization accelerator are used It is possible to provide a self-crosslinkable latex resin composition for a rubber glove from which a dip molding can be provided. According to the present invention, not only a productivity deterioration accompanied by the use of sulfur and a vulcanization accelerator can be prevented but also a problem caused by side effects caused by sulfur and a vulcanization accelerator can be solved.

Composition for dip molding and dip-molded article

본 발명의 딥 성형용 조성물은, α,β-에틸렌성 불포화 니트릴 단량체 단위, 및 공액 디엔 단량체 단위를 갖고, 상기 공액 디엔 단량체 단위의 적어도 일부를 수소화하여 이루어지는 니트릴기 함유 고포화 공중합체 고무 (a) 의 라텍스 (A) 를 포함한다. 본 발명의 딥 성형품은 상기 딥 성형용 조성물을 딥 성형하여 이루어진다. The composition for dip molding of the present invention has an α,β-ethylenically unsaturated nitrile monomer unit and a conjugated diene monomer unit, and a nitrile group-containing highly saturated copolymer rubber (a ) Of latex (A). The dip-molded article of the present invention is formed by dip-molding the dip-molding composition.

Method of obtaining latex

FIELD: textile and paper.SUBSTANCE: invention relates to latex used in the paper industry and to a method for its preparation. Method is carried out by carrying out the emulsion polymerization of a mixture of the following components: 1) at least two basic monomers, one of which is selected from the group of ethylenically unsaturated esters, and the other from the group of vinyl aromatic monomers, or at least two basic monomers selected from the group of ethylenically unsaturated esters, moreover, the homopolymer of one of the esters has a glass transition temperature of 100 °C and higher, and the homopolymer of the other ether has a glass transition temperature below 0 °C; 2) carboxylation agent selected from the group of ethylenically unsaturated carboxylic acids; 3) crosslinking agent selected from the group of nitrogen-containing polar monomers of the vinyl series; 4) functional monomer selected from the group of vinylsilanes; 5) mixtures of emulsifiers based on sulfonic ethers with degrees of ethoxylation of 2 and 30; 6) silicon-containing antifoam, and 7) molecular weight regulator, radical initiator and water.EFFECT: absence of coagulum in the process of synthesis of latex, as well as in obtaining latex with low foaming ability, which eliminates the likelihood of defects in the latex film.23 cl, 4 tbl, 9 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 676 609 C1 (51) МПК C08L 9/04 (2006.01) C08F 236/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК C08L 9/04 (2018.08); C08F 236/10 (2018.08) (21)(22) Заявка: 2017143330, 12.12.2017 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Публичное акционерное общество "СИБУР Холдинг" (RU) Дата регистрации: 09.01.2019 (45) Опубликовано: 09.01.2019 Бюл. № 1 2 6 7 6 6 0 9 R U (54) СПОСОБ ПОЛУЧЕНИЯ ЛАТЕКСА (57) Реферат: Изобретение относится к латексу, применяемому в бумажной промышленности, и к способу его получения. Способ осуществляется ...

Rubber composition for tire

提供将机械特性提高到现有水平以上的轮胎用橡胶组合物。本发明的轮胎用橡胶组合物，其特征在于，在包含5质量％以上的改性二烯系橡胶的二烯系橡胶100质量份中，配合氧化纤维素纳米纤维1～50质量份，所述改性二烯系橡胶具有0.1摩尔％以上的极性基。

Process for producing carbon nanotube composition and carbon nanotube composition

본 발명에 따른 카본 나노튜브의 제조 방법은, 평균 직경(Av)과 직경 분포(3σ)가 0.60>3σ/Av>0.20을 만족시키는 카본 나노튜브를, 캐비테이션 효과가 얻어지는 분산 처리에 의해서 용매에 분산시키는 분산 공정과, 상기 분산 공정에 의해서 얻어지는 카본 나노튜브 슬러리와 라텍스를 혼합하는 혼합 공정을 포함한다. The method for producing a carbon nanotube according to the present invention is characterized in that carbon nanotubes having an average diameter (Av) and a diameter distribution (3σ) satisfying 0.60> 3σ / Av> 0.20 are dispersed in a solvent by a dispersion treatment to obtain a cavitation effect And a mixing step of mixing the carbon nanotube slurry obtained by the dispersion step with the latex.