ВОДНАЯ КОМПОЗИЦИЯ ДЛЯ ПРОИЗВОДСТВА БУМАГИ И СПОСОБ ЕЕ ПОЛУЧЕНИЯ

Изобретение относится к водной композиции для производства бумаги. Водная композиция включает от 0,01 мас.% до 45 мас.% от общей массы водной композиции анионных органических полимерных частиц и коллоидных анионных частиц на основе диоксида кремния, массовое соотношение между которыми находится в пределах от 20:1 до 1:50. В качестве коллоидных анионных частиц используют диоксид кремния, модифицированный алюминием или амином диоксид кремния. Анионные органические полимерные частицы получают полимеризацией этилен-ненасыщенных мономеров с полифункциональными агентами разветвления и/или полифункциональными агентами сшивания. Способ получения водной композиции включает смешивание коллоидных анионных частиц на основе диоксида кремния с анионными органическими полимерными частицами. Способ получения бумаги из водной суспензии включает добавление к суспензии из волокон катионного полимера и водной композиции. Изобретение обеспечивает улучшение осушающих и удерживающих свойств водных композиций ...

ВОДОРАСТВОРИМЫЕ КОМПЛЕКСЫ ФУЛЛЕРЕНА C70 С ПОЛИ-N-ВИНИЛАМИДАМИ И СПОСОБ ПОЛУЧЕНИЯ ЭТИХ КОМПЛЕКСОВ

Описаны водорастворимые комплексы фуллерена C70 с поли-N-виниламидами общей формулы: Am-Bn, где А - звенья N-винилпирролидона, В - звенья N-винилкапролактама; при m=0-100 моль%, n=0-100 моль%, то есть в ряду, включающем соединения из ряда, содержащего поли-N-винилпирролидон, поли-N-винилкапролактам и сополимеры N-винилпирролидона с N-винилкапролактамом с характеристической вязкостью [η]=0,22-0,73 дл/г, при содержании фуллерена C70 2,2-3,3 мас.%, а также способ получения водорастворимых комплексов поли-N-виниламидов с фуллереном C70 смешением раствора поли-N-виниламида в хлороформе с раствором фуллерена C70 в органическом растворителе, с последующим удалением растворителей и выделением комплекса из водного экстракта, причем в качестве поли-N-виниламида берут вещества общей формулы Аm-Вn, где А - звенья N-винилпирролидона, В - звенья N-винилкапролактама; при m=0-100 моль%, n=0-100 моль%, то есть поли-N-винилпирролидон, поли-N-винилкапролактам и сополимеры N-винилпирролидона с N-винилкапролактамом ...

МЕДИЦИНСКИЙ КЛЕЙ ДЛЯ БЕСШОВНОГО СОЕДИНЕНИЯ КРАЕВ РАНЫ НА ОСНОВЕ РЕАКЦИИ ПОЛИМЕРИЗАЦИИ

Изобретение относится к технологии получения медицинских клеев для склеивания биологических тканей. Препарат предназначен для местного применения на коже при проведении операций в хирургии и комбустиологии. Медицинский клей для бесшовного соединения биологических тканей, образующий адгезионный слой на основе реакции полимеризации в присутствии железа крови и перекиси водорода, содержит акриловую кислоту и поливинилпирролидон, являющийся матрицей для прививочной полимеризации при образовании адгезионного слоя. Медицинский клей по изобретению характеризуется высокими адгезионными, антисептическими, дезинтоксикационными свойствами.

Verfahren zur Herstellung von inversen Mikrolatices und deren Verwendungen

Kompatibilisierungsmittel für wenigstens zwei unversträgliche thermoplastische Polymere und so erhaltene thermoplastische Legierungen

Kompatibilisierungsmittel und seine Verwendung zur Herstellung von Legierungen von thermoplastischen Polymeren.

COPOLYMERISATE VON N-VINYLPYRROLIDON, VERFAHREN ZU IHRER HERSTELLUNG UND KOSMETISCHE MITTEL

COPOLYMERS WITH ETHYLENICALLY UNSATURATED MONOMERS AS BASIC ELEMENTS AND SEVERAL FUNCTIONAL GROUPS

Hydrogel copolymers

An optically transparent hydrogel forming material comprising a copolymer of an optically transparent polyester having a molecular weight of 1,000 to 100,000 and at least one of polymerizable group in its molecule and N-vinyllactam. The hydrogel forming material has an excellent optical property, high gas-permeability and excellent mechanical property.

HYDROGEL FUNDAMENTAL MATERIAL

COPOLYMERS OF N-VINYLPYRROLIDONE AND A VINYL ALLYL OR METHALLYL ESTER OF AN OR-CYCLIC CARBOXYLIC ACID AND THEIR USE IN COSMETICS

AQUEOUS COMPOSITION

KOSMETISCHE EMULSIONEN VOM WASSER-IN-OL-TYP

PROCEDURE FOR THE PRODUCTION OF NEW OF FLUORIDATED KOPOLYMERE AS WELL AS THEIR SALTS AND QUATERNAEREN CONNECTIONS

PROCEDURE FOR THE PRODUCTION OF NEW POLYMERS WITH ANTIINFLAMMATORI EFFECT

PROCEDURE FOR THE PRODUCTION OF AQUEOUS POLYVINYLLACTAM DISPERSIONS

Polyvinylpyrrolidone hybrid polymer having a backbone grafted with polyvinylpyrrolidone

Um ein Polyvinylpyrrolidon-Hybridpolymer mit einem mit Polyvinylpyrrolidon gepfropften Rückgrat zu erhalten, wird vorgeschlagen, dass das Polyvinylpyrrolidon an ein Polyphosphazen gemäß der Strukturformel gepfropft wird.

CONTACT LENS MATERIAL

PRESSURE-SENSITIVE ADHESIVE COMPOSITION FROM POLY (N-VINYL LACTAM), PROCEDURES FOR YOUR PRODUCTION AND USE

POLYMERE ONE AND OLIGOMERE OF BILE ACID DERIVATIVES, PROCEDURE FOR YOUR PRODUCTION AND YOUR USE AS DRUGS

HYDROPHILIC POLYMERS AND CONTACT CONTACTS.

BONDING AGENT FOR THE TRANSFER PRINTING.

PROCEDURE FOR THE INTERMITTENT PRODUCTION OF INTERLACED ONE, PURIFY-HASTY POLYMERS.

LIQUID RADIATION-HARDENABLE COMPOSITION, IN PARTICULAR FOR THE STEREOLITHOGRAPHIE

WATER-SOLUBLE COPOLYMERS, A PROCEDURE FOR YOUR PRODUCTION AND YOUR USE AS FLOW MATERIALS IN SOLID SUSPENSIONS.

PROCEDURE FOR THE PRODUCTION OF WATER-SOURCECASH PRODUCTS USING PURIFYING PORTIONS OF WATER-SOURCECASH OF POLYMERE ONES.

HYDROPHILIC ONE, SWITCH AND OXYGEN PERMEABLE ONE COPOLYMER COMPOSITIONS.

PROCEDURE FOR THE PRODUCTION OF NEW POLYMERS WITH ANTIINFLAMMATORI EFFECT

HYDROLYSIS RESISTANT VINYL LACTAM AMINO ACRYLAMIDE OF POLYMERS.

POLYMERE ONE FOR COSMETIC FORMULATIONS

POLYETHYLENGLYCOLDERIVATE WITH NEIGHBOURING REACTIVE GROUPS

ASSOCIATIVE REACTIVE BLEND-CONTAINING COMPOSITIONS

Implant filling material and method

Compositions of cross-linked polyvinylpyrrolidone (PVP) are disclosed that are generally in the form of an elastic, hydrophilic, water-insoluble viscous cohesive mass of material that has many important medical uses including uses as a filler for implants. The present invention also involves a process for producing such compositions.

Uv-absorbing benzotriazoles having a styrene group

Antimicrobial quaternary ammonium group-containing polymers, compositions thereof, and monomers used to produce said polymers

FILM-FORMING COMPOSITION.

Polymers for separation of biomolecules by capillary electrophoresis

Polymeric networks from water-soluble prepolymers

HIGH ION AND METABOLITE FLUX LENSES AND MATERIALS

An exemplary embodiment provides a biocompatible polymer composition suitable for making intraocular lenses, especially posterior chamber phakic lenses, that includes a hydrogel having an equilibrium water content of less than about 55 wt. %. The hydrogel has a refractive index greater than about 1.41 and a sodium ion flux between about 16 to about 20 µeq-mm/hr/cm2.

HYDROPHILIC POLYMER COMPOUND HAVING ANTICOAGULATION EFFECT

An object of the present invention is to provide a hydrophilic polymer compound which can inhibit both of the blood coagulation reactions in the primary hemostasis stage in which platelets are involved and in the coagulation thrombus formation stage in which blood coagulation factors are involved, which hydrophilic polymer compound can be firmly immobilized on the surface of medical devices or medical materials, in the state retaining the anticoagulant activity. The present invention provides a hydrophilic polymer compound comprising a polymer compound which inhibits platelet adhesion, and a compound that inhibits blood coagulation reaction, bound to said polymer compound.

PLIABLE FILMS OF POLYMERIC HALOGEN COMPLEXES

PLIABLE FILMS OF POLYMERIC HALOGEN COMPLEXES Iodine and/or bromide complexes with non-crosslinked vinylpyrrolidone/vinyl acetate copolymer containing up to 50% vinylpyrrolidone to provide a pliable antimicrobial film.

THERMOSETTING COMPOSITIONS CONTAINING A PREPOLYMER WITH AN IMIDE GROUP, AND AN EPOXY RESIN

La présente invention a pour objet des compositions thermodurcissables stables au stockage. Elles comprennent un prépolymère à groupement imides obtenu par réaction d'un polyimide d'acide carboxylique insaturé avec le N-vinylpyrro-lidone-2 et éventuellement un polyester insaturé et une résine époxy. Ces compositions entrent dans la fabrication d'objets moulés et articles composites.

PREPARATION OF POLYVINYLPYRROLIDONE OR VINYLPYRROLIDONE/VINYL ACETATE COPOLYMERS OF VARIOUS MOLECULAR WEIGHTS USING A SINGLE INITIATOR SYSTEM

FDN-1383/1399 PREPARATION OF POLYVINYLPYRROLIDONE OR VINYLPYRROLIDONE/VINYL ACETATE COPOLYMERS OF VARIOUS MOLECULAR WEIGHTS USING A SINGLE INITIATOR SYSTEM Vinylpyrrolidone or vinylpyrrolidone and vinyl acetate monomers are polymerized using free radical initiator consisting of t-Butylperoxypivalate and preferably in solvent consisting essentially of water, isopropyl alcohol, sec. butyl alcohol or mixtures thereof to produce polyvinylpyrrolidone or vinylpyrrolidone/vinyl acetate copolymer.

POLYMERES GREFFES AVEC DES MOLECULES ANTI-INFLAMMATOIRES

CONTACT LENSES AND MATERIALS AND METHODS OF MAKING SAME

An interpenetrating network copolymer, method of producing same, and method of producing optical lens blanks and finished lenses therefrom. The method broadly involves the preparation of first and second mixtures of polymerizable vinyl monomers and interrupting the polymerization of the first mixture at a relative viscosity of from about 1.05 to about 10 by admixing the partially polymerized first mixture with the second mixture to create a casting solution and thereafter, when desired, polymerizing molded casting solution in heat to create a solid lens material.

TACKIFIED ACRYLIC PRESSURE-SENSITIVE ADHESIVE

A pressure-sensitive adhesive that has high cohesive strength and adheres permanently to high-solids automotive paint systems preferably comprises a mixture of (1) a crosslinked acrylic copolymer of acrylic acid ester and N-vinyl-2-pyrrolidone, and (2) certain tackifier resins. Useful tackifier resins are poly(isobornylmethacrylate), pentaerythritol ester of rosin, and mixedaliphatic/aromatic polymeric tackifier resins such as a t-butylated styrene. The tackifier resin preferably has a Tg of at least 30.degree.C, Mn from 300 to 3000, and a solubility parameter from 8 to 9. The novel pressure-sensitive adhesive is particularly useful as a dense surface layer of a composite tape having a foamlike core.

TEMPORARY WET STRENGTH RESINS WITH NITROGEN HETEROCYCLIC NONNUCLEOPHILIC FUNCTIONALITIES AND PAPER PRODUCTS CONTAINING SAME

Temporary wet strength resins, and paper products containing same, having a molecular weight of from about 20,000 to about 200,000, most preferably from about 30,000 to about 95,000, having the formula: wherein: A is or and X is -O-, -NH-, or -NCH3-, and R is a substituted or unsubstituted aliphatic group; Y1 and Y2 are independently -H, -CH3, or a halogen; W is a nonnucleophilic, water-soluble nitrogen heterocyclic moiety; and Q is a cationic monomeric unit. The mole percent of "a" ranges from about 30% to about 70%, preferably from about 45% to about 55%; the mole percent of "b" ranges from about 30% to about 70%, preferably from about 45% to about 55%; and the mole percent of "c" ranges from about 1% to about 40%, most preferably from about 2% to about 8%.

PREPARATION OF INSOLUBLE POLYMER POWDERS WHICH ARE ONLY SLIGHTLY SWELLABLE

HYDROXYL-CONTAINING LIQUID POLYMERS AND PRESSURE- SENSITIVE ADHESIVES PREPARED THEREFROM

PREPARATION OF POLYVINYLPYRROLIDONE OR VINYLPYRROLIDONE/VINYL ACETATE COPOLYMERS OF VARIOUS MOLECULAR WEIGHTS USING A SINGLE INITIATOR SYSTEM

THERMOSETTING COMPOSITIONS CONTAINING A PREPOLYMER WITH AN IMIDE GROUP, AND AN EPOXY RESIN

HIGH MOLECULAR WEIGHT POLYVINYLPYRROLIDONES AND MEHIGH MOLECULAR WEIGHT POLYVINYLPYRROLIDONES AND METHOD FOR THEIR PREPARATION THOD FOR THEIR PREPARATION

... 2079911 9115522 PCTABS00007 An uncrosslinked, water-soluble polyvinylpyrrolidone having a K-value in excess of 120 and containing less than about 0.1 percent by weight of residual monomer. A method for preparing the high molecular weight polyvinylpyrrolidone is also disclosed.

PREPARATION OF DISCRETE MICRODROPLETS OF AN OIL IN WATER STABILIZED BY IN SITU POLYMERIZATION OF A WATER-SOLUBLE VINYL MONOMER

What is provided herein is a method for preparing a product which comprises discrete microdroplets of an oil in water stabilized by in situ polymerization of a water-soluble vinyl monomer. The method comprises dispersing the oil in water, option- ally with a surfactant, adding the water-soluble vinyl monomer, preferably vinylpyrrolidone, optionally with a comonomer, and polymerizing the monomer or comonomers in situ such that the oil is stabiliz ed in the resulting polymer solution as discrete mic- rodroplets. The product is used in conditioning hair care compositions and hair and skin care compositions, including those con- taining a water-soluble acryl comonomer.

WETTABLE SILICONE HYDROGEL COMPOSITIONS AND METHODS FOR THEIR MANUFACTURE

WATER-SOLUBLE COPOLYMERS, A PROCESS FOR THEIR PREPARATION AND THEIR USE AS FLUIDIZERS IN SUSPENSIONS OF SOLID MATTERS

POLYMERS FOR SEPARATION OF BIOMOLECULES BY CAPILLARY ELECTROPHORESIS

The invention provides uncharged water-soluble silica-adsorbing polymers for suppressing electroendoosmotic flow and to reduce analyte-wall interactions in capillary electrophoresis. In one aspect of the invention, one or more of such polymers are employed as components of a separation medium for the separation of biomolecules, such as polynucleotides, polysaccharides, proteins, and the like, by capillary electrophoresis. Generally, such polymers are characterized by (i)water solubility over the temperature range between about 20.degree.C to about 50.degree.C, (ii) concentration in a separation medium in the range between about 0.001 % toabout 10 % (weight/volume), (iii) molecular weight in the range of about 5 x 103to about 1 x 106 daltons, and (iv) absence of charged groups in an aqueous medium having pH in the range of about 6 to about 9. In one embodiment, polymers of the invention are selected from the group consisting of polylactams,such as polyvinylpyrrolidone; N_N disubstituted ...

TARGETED POLYMERIC CONJUGATES OF CYCLOSPORIN AND MTARGETED POLYMERIC CONJUGATES OF CYCLOSPORIN AND METHOD FOR THEIR PREPARATION ETHOD FOR THEIR PREPARATION

... 2079590 9213569 PCTABS00014 The structure and the manner of manufacture of polymeric conjugates of cyclosporin, characterized in that they as polymeric carriers contain 40-700 polymerized monomeric units composed from 20-99 % mol. biologically inert hydrophilic units, such as N-(2-hydroxypropyl)methacrylamide, N-vinylpyrrolidone, or acrylic and methacrylic acid in the form of sodium salts, 0.1-25 % mol. units of methacryloylated amino acids or methacryloylated oligopeptides with terminally bound cyclosporin and 0-10 % mol. units of methacryloylated amino acids or oligopeptides, with an antibody bound to them as the determinant of transport to the targeted cells.

BIOADHESIVE PHARMACEUTICAL COMPOSITION FOR THE CONTROLLED RELEASE OF ACTIVE INGREDIENTS

La présente invention concerne une nouvelle composition pharmaceutique bioad hésive permettant la libération prolongée de principes actifs dans la cavité buccal e ou par voie transmucosale.

Process for preparing polyvinylpyrrolidone

COPOLYMERS OF N-VINYL PYRROLIDONE AND VINYL ESTER, ALLYL OR METHALLYLIQUE CARBOXYLIC ACID ALPHA OR BETA-CYCLIC, AND THEIR USE IN COSMETICS.

COMPOSITION FOR SOFT CONTACT LENSES EXHIBITING INCREASED OXYGEN PERMEABILITY, AND CORRESPONDING LENSES.

Водорастворимые биологически активные сополимеры

Изобретение относится к биологически активным соединениям, в частности к водорастворимым сополимерам со свойствами регуляторов роста растений. Сополимеры, согласно изобретению, состоят из структурных единиц N-винилпироллидона и метакрилата калия или аммония в молярном соотношении 84:16, со свойствами регуляторов роста растений. Результат изобретения заключается в том что, заявляемые сополимеры позволяют повысить урожайность на 7…10% в сравнении с наиболее близким решением. П. формулы: 1 ...

Способ получения сополимера винилкетофталоцианин цинка с N-винилпирролидоном

Изобретение относится к области химии, биофизики и медицины, в частности, к способу получения металлофталоцианинового фотоактивного полимерного материала из сополимеров N-винилпирролидона, который можно использовать в качестве препарата с фототерапевтическими свойствами. Способ получения сополимера винилкетофталоцианин цинка с N-винилпирролидоном включает синтез винилкетофталоцианинового мономера цинка путем обработки фталоцианина цинка акрилоилхлоридом при температуре 0-5°С, получение сополимера винилкетофалоцианина цинка с N-винилпирролидоном путем полимеризации в присутствии 2 моль% инициатора азобисизобутиронитрила при температуре 80°С в течение 8 часов. Полученный сополимер содержит от 10 до 30 моль% винилкетофалоцианина цинка. Технический результат изобретения состоит в повышении в 3 раза содержания винилкетофталоцианина цинка в составе сополимера, что обеспечивает повышение фототерапевтических и фотоэлектрических свойств полученного сополимера. П. формулы: 1 Фиг.: 2 ...

Способ получения нанокомпозита CdSe/ZnS/PVP

Изобретение относится к нанотехнологиям, а именно к способам получения слоев нанокомпозитов, и может быть использовано в медицине и оптоэлектронике. Способ получения нанокомпозита CdSe/ZnS/PVP включает отдельное приготовление коллоидального раствора наночастиц или наносуспензии CdSe/ZnS и раствора поливинилпирролидона с использованием гидрофильных растворителей: ацетон, ацетилацетон, их смешивание, где соотношение между CdSe/ZnS и поливинилпирролидоном равняется 1…10, диспергирование полученной смеси в ультразвуковой ванне в течение 5…30 мин, помещение диспергированной смеси, для электрофоретического нанесения, в ячейку с двумя электродами, расположенными на расстоянии 10 мм один от другого, один из которых выполнен из стекла и покрыт In2O3-SnO2 (1TO), а второй - из титана, подачу на электроды постоянного напряжения в 700 В в течение 3…30 мин до формирования пленочного нанокомпозита на стеклянном электроде. П. формулы: 2 Фиг.: 3 ...

Method for stabilizing polymers

MATIERE POLYMERE PERMETTANT DE FORMER DES HYDROGELS TRANSPARENTS, A HAUTE PERMEABILITE POUR LES GAZ ET A BONNES PROPRIETES MECANIQUES

MATIERE CONSTITUANTE POUR HYDROGELS TRANSPARENTS. CETTE MATIERE CONSISTE EN UN COPOLYMERE D'UN POLYESTER TRANSPARENT DE POIDS MOLECULAIRE 1000 A 100000 QUI CONTIENT AU MOINS UN GROUPE POLYMERISABLE DANS SA MOLECULE ET D'UN N-VINYL-LACTAME. PAR ADDITION D'EAU A CETTE MATIERE, ON OBTIENT DES HYDROGELS POSSEDANT D'EXCELLENTES PROPRIETES OPTIQUES, UNE HAUTE PERMEABILITE POUR LES GAZ ET D'EXCELLENTES PROPRIETES MECANIQUES, PERMETTANT EN PARTICULIER LEUR UTILISATION DANS LA FABRICATION DE LENTILLES DE CONTACT.

THREE DIMENSIONAL POLYMERIC HYDROPHILIC AND METHOD FOR PREPARATION THEREOF

Procédé de fabrication d'une lentille en polymère transparent à indice de réfraction module.

La présente invention concerne un procédé de fabrication d'une lentille optique à modulation d'indice de réfraction, caractérisé en ce que, partant d'une lentille de polymère hydrophile transparent de type hydrogel, préalablement mise en forme, on imprègne cette lentille d'une composition photopolymérisable comportant au moins un monomère et un photo-initiateur en solution dans l'eau, on soumet la lentille imprégnée à une irradiation modulée localement en intensité et/ou temps d'irradiation, provoquant une polymérisation sélective locale du monomère, puis on élimine l'excédent de photo-initiateur et monomère non polymérisable par extraction à l'eau.

COPOLYMERES FLUORES ET LEUR APPLICATION AU TRAITEMENT HYDROFUGE ET OLEOFUGE DE SUBSTRATS DIVERS

L'INVENTION A POUR OBJET DES COPOLYMERES FLUORES ET LEUR APPLICATION AU TRAITEMENT HYDROFUGE ET OLEOFUGE DE SUBSTRATS DIVERS. CES COPOLYMERES COMPRENNENT EN POIDS: A.35 A 98 D'UN OU DE MONOMERE(S) DE FORMULE: (CF DESSIN DANS BOPI) DANS LAQUELLE RF EST UN RADICAL PERFLUORE, Q EST UN ATOME D'OXYGENE OU DE SOUFRE, B EST UN ENCHAINEMENT BIVALENT LIE A Q PAR UN CARBONE, L'UN DES SYMBOLES R EST UN ATOME D'HYDROGENE ET L'AUTRE UN ATOME D'HYDROGENE OU UN RADICAL ALKYLE; B.1 A 15 D'UN OU DE MONOMERE(S) DE FORMULE: (CF DESSIN DANS BOPI) DANS LAQUELLE B EST UN RADICAL ALKYLENE, R EST UN ATOME D'HYDROGENE OU UN RADICAL ALKYLE, R ET R SONT DES RADICAUX ALKYLE, HYDROXYETHYLE OU BENZYLE OU, ENSEMBLE AVEC L'ATOME D'AZOTE, FORMENT UN RADICAL HETEROCYCLIQUE; C.1 A 50 D'UN OU DE MONOMERE(S) DE FORMULE: (CF DESSIN DANS BOPI) DANS LAQUELLE R, R, R ET R SONT DES ATOMES D'HYDROGENE OU DES RADICAUX ALKYLE; ET EVENTUELLEMENT D.JUSQU'A 10 D'UN AUTRE MONOMERE QUELCONQUE. CES COPOLYMERES SONT PARTICULIEREMENT BIEN ...

COSMETIC EMULSIONS OF TYPE EAU-DANS-L' OILS CONTAINING COPOLYMERS OF THE N-VINYLPYRROLIDONE

COMPATABILIZING AGENT FOR AT LEAST TWO INCOMPATIBLE THERMOPLASTIC POLYMERS, METHOD OF MANUFACTURE, ITS APPLICATION FOR MAKING THERMOPLASTIC ALLOYS, THERMOPLASTIC ALLOYS OBTAINED

POLYMERIZABLE EMULSIFYING AGENT

METHOD OF PREPARATION OF MICROLATEX OPPOSITE AND THE MICROLATEX OPPOSITE OBTAINED

RIDICALIZING POLYMERIZATION CONTROLEE OF N-VINYL LACTAMS IN AQUEOUS MEDIUM

PROCESS IMPROVES CASTING FOR POLYMER STEMS

HYDROGELS AND CONTACT LENSES FORMED THEREFROM

METHOD FOR DRYING VINYL PYRROLIDONE-BASED POLYMER, WHICH USES IRON-MADE AND NICKEL/CHROME-PLATED COMPRESSION ROLL

PURPOSE: Provided is a method for drying a vinyl pyrrolidone-based polymer, which avoids a need for shut down of a drying process for removing rust, permits continuous drying of the polymer, and is cost-efficient. CONSTITUTION: The method for drying a vinyl pyrrolidone-based polymer comprises the steps of: applying a solution containing a vinyl pyrrolidone-based polymer and water onto an electrically heated surface(1a) of a heating surface contact type drier by using a compression roll(3,4) and drying the solution; and removing the dried vinyl pyrrolidone-based polymer from the heated surface by using a removing member, wherein the compression roll is made of iron, and is treated by nickel plating and then chrome plating. © KIPO 2006 ...

Catalyst composition for use in [...]

terpolìmeros to condition/shape and cosmetic composition.

USE OF VINYLPYRROLIDONE AND VINYLIMIDAZOLE COPOLYMERS AS WASHING AGENT ADDITIVES AND PROCESS FOR PRODUCING THE SAME

Copolymers may be produced by radical-initiated copolymerisation of monomer mixtures composed of (a) 60 to 99 % by weight 1-vinylpyrrolidone, 1-vinylimidazole or their mixtures; (b) 1 to 40 % by weight nitrogenated, basic, ethylenically unsaturated monomers as free bases, salts or in quaternary form and if required (c) up to 20 % by weight of other monoethylenically unsaturated monomers. These copolymers are used as additives for washing agents to inhibit fading during washing. Also disclosed are washing agents containing such polymers, as well as polymers which may be produced by radical-initiated polymerisation of (a) 1-vinylpyrrolidone, 1-vinylimidazole, 1-vinylimidazolium compounds or their mixtures and if required (b) other nitrogenated, basic, ethylenically unsaturated monomers as free bases, salts or in quaternary form, and/or (c) other monoethylenically unsaturated monomers, in an aqueous medium in the presence of water-soluble proteins. A process is disclosed for preparing these ...

Hydrogel contact lenses for permanent wear

A process is disclosed for the preparation of hydrogel contact lenses having improved mechanical properties, said process comprising polymerizing, in the presence of an azo type initiator, a monomer mixture comprising from 25% to 50% by weight of N-vinyl pyrrolidone, up to 5% by weight of methacrylic or acrylic acid, 0.1 to 1% by weight of 1,3,5-tris(propenoxy)-2,4,6-triazine (TPT), or perhydro-2,4,6,-triketo-1,3,5,-tris (propene-2)- 1,3,5 - triazine (T.T.P.T.), as a cross-linking monomer, the balance being essentially hydroxy alkyl acrylate or methacrylate, wherein the alkyl group is ethyl or propyl.

Controlled-release, drug-delivery composition

A controlled-release, drug-delivery, emulsion composition for topical application comprising (a) the reaction product of the non-aqueous, heterogeneous polymerization of a reaction mixture of about 5-70%, preferably 10-30%, by weight, of a vinyl monomer in an oil as solvent, and a free radical initiator, optionally in the presence of a crosslinking agent and/or a surfactant, wherein the oil solvent is present in an amount sufficient to keep the resultant polymer in a stirrable state throughout the polymerization, (b) water, (c) a surfactant and (d) a pharmaceutical medicament.

Contact lens composition having increased oxygen permeability

Acrylic siloxanes having the formula: where R1 is selected from the class of hydrogen or methyl groups, "a" is an integer from one to five, "b" is an integer from zero to seven, "c" is an integer from zero to two, "d" is an integer from zero to one, A is selected from the class of methyl or phenyl groups, R2 is selected from the class of methyl or phenyl groups, R3 and R4 represent either no group (cyclic ring from "c" to "d") or methyl or phenyl groups, act synergistically with vinyl pyrrolidone and hydroxy ethyl methacrylate to provide optically clear moderate water containing contact lenses of substantially increased oxygen permeability.

Post-treatment of a polymeric composition

A post-treatment product and process for making a water-resistant polymeric coating or a strongly-swellable polymeric gel includes providing a stable, aqueous two-phase polymeric composition by the steps of forming a reaction mixture in a reaction vessel which includes a water-soluble vinyl monomer, optionally with one or more water-soluble comonomers, a first amount of a crosslinking agent, and water, heating the mixture, then periodically adding a predetermined amount of an initiator, and polymerizing at about 30-130° C., optionally removing the resultant two-phase composition from the reaction vessel, adding a predetermined amount of additional crosslinker or proteinaceous compound thereto, optionally coating the mixture onto a support, and optionally heating to further polymerize or process the mixture.

PROCESS FOR PREPARING VINYLPYRROLIDONE POLYMER

A vinylpyrrolidone polymer which is little colored, gives off a bad smell little, and contains extremely little impurities is provided. The polymerization is performed by adding a water-soluble organic peroxide and a sulfite to a vinylpyrrolidone aqueous solution.

Process for the distillation of a mixture comprising a cyclic N-vinylamide

A process for the distillation of a mixture which consists to at least 90% by weight of a cyclic N-vinylamide and which comprises a stabilizer, wherein a polyether is added to the mixture before or during distillation and a product is obtained which consists to at least 99.5% by weight of the cyclic N-vinylamide.

HIGH PERFORMANCE PRESSURE-SENSITIVE ADHESIVE POLYMERS

Pressure-sensitive copolymers based on acrylic monomers are provided with high adhesive performance characteristics by the inclusion of a synergistic amount of an N-vinyl lactam monomer and a glycidyl monomer with the bulk of the monomers being an alkyl acrylate and/or methacrylate esters.

POLYMERS OF ALKYL-1-VINYLIMIDAZOLES

Polymers of alkyl-1-vinylimidazoles and processes for the production thereof by the radical polymerisation of monomer mixtures comprising: (a) 10 to 100 wt. % at least one alkyl-1-vinylimidazole and (b) 0 to 90 wt. % 1-vinylpyrrolidone, 1-vinylcaprolactam, 1-vinyltriazole, 1-vinylimidazole, 1-vinyloxazolidinone or mixtures thereof, (c) 0 to 30 wt. % other monoethylenically unsaturated monomers and (d) 0 to 10 wt. % a monomer containing at least 2 monoethylenically unsaturated double bonds, in water, and at least one C1-C4 alcohol or mixtures thereof in the presence of polymerisation regulators. Also disclosed is the use of polymers, at least 10 wt. % of which is an alkyl-1-vinylimidazole incorporated in the polymer, as an additive to detergents to prevent colour transfer during the wash.

PREPARATION OF DISCRETE MICRODROPLETS OF AN OIL IN WATER STABILIZED BY IN SITU POLYMERIZATION OF A WATER-SOLUBLE VINYL MONOMER

What is provided herein is a method for preparing a product which comprises discrete microdroplets of an oil in water stabilized by in situ polymerization of a water-soluble vinyl monomer. The method comprises dispersing the oil in water, optionally with a surfactant, adding the water-soluble vinyl monomer, preferably vinylpyrrolidone, optionally with a comonomer, and polymerizing the monomer or comonomers in situ such that the oil is stabilized in the resulting polymer solution as discrete microdroplets. The product is used in conditioning hair care compositions and hair and skin care compositions, including those containing a water-soluble acryl comonomer.

QUATERIZED COPOLYMER SUITABLE AS ACTIVE INGREDIENT IN COSMETIC FORMULATION, AND HAIR COSMETIC AND SKIN COSMETIC CONTAINING THE SAME

PROBLEM TO BE SOLVED: To obtain a quanternized copolymer useful as an ingredient in hair styling compositions, which has good setting and caring characteristics with superior skin characteristics by free-radical copolymerization of a specific monomeric mixture. SOLUTION: The objective quaternized copolymer is obtained from free- radical copolymerization of a monomeric mixture comprising (A) 5-50 (wt.)% 1-vinylimidazole or a quaternized 1-vinylimidazole, (B) 20-80% N- vinylcaprolactam, (C) 10-60% N-vinylpyrrolidone, and (D) 0-30% other free- radically polymerizable monomer which has a glass transition temperature over 20°C as a homopolymer, preferably such as t-butyl acrylate. If non- quaternizd 1-vinylimidazole in component (A) is used, the objective copolymer is obtained by quaternization of the polymer later. Further, the component (A) is preferably 3-ethyl-1-vinylimidazolium chloride or its methylsulfate. COPYRIGHT: (C)1996,JPO ...

FILM-FORMING POLYMER AND HAIR CARE PRODUCT CONTAINING SAME

PURPOSE: To obtain a film-forming polymer improved in an ability to set the hair under high humidity and its persistence by copolymerizing a specified vinylpyrrolidone with a silicone macromer. CONSTITUTION: 20-99wt.% vinylpyrrolidone of formula I (wherein R1 is H or 1-20 C alkyl) is copolymerized with 1-80wt.% silicone macromer of formula II [wherein X is a radical-polymerizable group; R2 to R6 are each methyl, alkoxy, (substituted) phenyl or (substituted) phenoxy; m is 1-0; and n is 50-150] at 30-100°C for 1-10hr in the presence of 0.001-2.0mol%, based on the monomer mixture, radical polymerization initiator (e.g. 2,2'-azobisisobutyronitrile) to obtain a silicone/vinylpyrrolidone copolymer. 0.01-15wt.% this copolymer is mixed with 5099.8wt.% solvent such as a lower alcohol, a polyol or water and 0.1-20wt.% oil such as a hydrocarbon or an ester oil to obtain a hair care product. COPYRIGHT: (C)1992,JPO&Japio ...

THICKENING AGENT

PURPOSE: To prevent gelation and a decrease in viscosity in a high-temperature environment and to improve the solubility and thickening ability in an aqueous electrolyte solution of high concentration by using a copolymer composed of a cationic vinyl monomer and a specified vinyl monomer. CONSTITUTION: A thickening agent comprising a copolymer having a weight- average molecular weight of 100,000 to 10,000,000 is obtained by copolymerizing a cationic vinyl monomer (A) preferably comprising a quaternary salt or betaine monomer (e.g. N-methacryloxyethyltrimethylammonium chloride) with a vinyl monomer (B) of formula I or II (wherein R1 and R2 are each 1-4C alkyl; R3 is trimethylene or pentamethylene) (e.g. N-vinylpyrrolidone) at a weight ratio of A to B of (90 to 10):(10 to 90), and if necessary, a monomer copolymerizable therewith in an aqueous medium in the presence of a polymerization initiator. COPYRIGHT: (C)1992,JPO&Japio ...

HYDROPHILIC COPOLYMER AND ITS PRODUCTION

PURPOSE: To provide a hydrophilic copolymer having high swelling performance and satisfactory mechanical properties and suitable for manufacture of intraocular lens because of its extremely low water-soluble extraction content by radically copolymerizing a specified monomer with vinyl-pyrolidone. CONSTITUTION: Under the presence of 0.01-50 (wt.)% cross-linking agent to the total weight of monomers [suitably, 3,3'-ethylidene-bis-(1-vinyl-pyrolidone) or the like], 95-5% alkyleneglycolacetate (meth)acrylate of the formula [R is CH2=CH-, CH2=C(CH3)-; (n) is 1-3] and 5-95% 1-vinyl-2-pyrolidone are radically copolymerized by use of a radical initiator (suitably, persulfate-disulfide or the like) to provide the objective copolymer. When this copolymerization is performed in the presence of a solvent, glycerol, glycol, water or the like is preferably used as the solvent. COPYRIGHT: (C)1990,JPO ...