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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 33199. Отображено 100.
05-01-2012 дата публикации

Oil-In-Water Silicone Emulsion Composition

Номер: US20120004354A1
Принадлежит: Dow Corning Toray Co Ltd

An oil-in-water silicone emulsion composition comprising (A) 100 mass parts of a polyorganosiloxane that contains in each molecule at least two silicon-bonded hydroxyl or hydrolyzable groups, (B) 0.1 to 200 mass parts of a colloidal silica, (C) 1 to 100 mass parts of an ionic emulsifying agent, (D) 0.1 to 50 mass parts of a polyoxyethylene-polyoxypropylene copolymer-type nonionic emulsifying agent, and (E) 10 to 200 mass parts water. Such oil-in-water silicone emulsion composition exhibits an excellent storage stability, contains little low molecular weight silicone, and can form, even without the use of a tin catalyst, a cured film that exhibits a satisfactory elasticity, through the removal of the water fraction.

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26-01-2012 дата публикации

Organopolysiloxane Emulsions and Their Production

Номер: US20120020909A1
Принадлежит: Dow Corning Corp

This invention relates to aqueous emulsions comprising a polyorganosiloxane and a wax, and to methods of production of such emulsions. The emulsions are of the type oil-in-water. An organopolysiloxane is polymerized in admixture with a molten wax, thereby forming a blend of the wax with an organopolysiloxane of increased molecular weight, and the said blend of polymer and molten wax is emulsified in water in the presence of a surfactant. The emulsions are useful in personal care applications such as on hair, skin, mucous membrane or teeth. The emulsions are also useful in applications such as paints, water based coatings, textile fibre treatment, leather lubrication, fabric softening, fabric care in laundry applications, homecare, release agents and oil drag reduction.

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26-01-2012 дата публикации

Vinyl ester/ethylene-based binders for paper and paperboard coatings

Номер: US20120021237A1
Принадлежит: Celanese International Corp

Disclosed are surfactant-stabilized latex emulsions which can be used as binders in paper coating compositions. Such latex emulsions comprise an interpolymer formed by emulsion polymerizing monomers selected from vinyl esters, e.g., vineyl acetate; ethylene; certain unsaturated mono- and di-carboxylic acid materials such as acrylic acid or maleic anhydride; and certain polyethylenically unsaturated cross-linking co-monomers such as diallyl phthalate. These latex emulsions are stabilized with surfactants which are substantially free of environmentally suspect alkyl phenol ethoxylates (APEs). The paper coating compositions containing latex emulsion binders of this type exhibit especially desirable coating strength as quantified by the Dry Pick Values (as defined herein) which such compositions provide.

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02-02-2012 дата публикации

Aqueous dispersion, its production method, and its use

Номер: US20120029132A1
Принадлежит: Dow Global Technologies LLC

Aqueous dispersions including at least one thermoplastic resin; at least one dispersing agent; and water; wherein the dispersion has a pH of less than 12 are disclosed along with dispersions including at least one thermoplastic resin; at least one dispersing agent; and water wherein the dispersion has a volume average particle size of less than about 5 μm. Some dispersions include less than about 4 percent by weight of the dispersing agent based on the weight of the thermoplastic resin. Other dispersions include at least one propylene-rich alpha-olefin interpolymer; at least one dispersing agent; and water. Methods of making such dispersions are also described.

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01-03-2012 дата публикации

Continuous Process For Preparing Nanodispersions Using An Ultrasonic Flow-Through Heat Exchanger

Номер: US20120049163A1
Принадлежит: Xerox Corp

Described is a continuous process for preparing nanodispersions including providing a composition comprising a liquid and a solute; heating the composition to dissolution of the solute to form a solution comprising the solute dissolved in the liquid; directing the heated solution through a continuous tube wherein the continuous tube has a first end for receiving the solution, a continuous flow-through passageway disposed in an ultrasonic heat exchanger, and a second end for discharging a product stream; treating the heated solution as the solution passes through the continuous flow-through passageway disposed in the ultrasonic heat exchanger to form the product stream comprising nanometer size particles in the liquid; optionally, collecting the product stream in a product receiving vessel; and optionally, filtering the product stream.

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01-03-2012 дата публикации

Low cost process for manufacture of form-stable phase change material

Номер: US20120049402A1
Автор: Ramin Abhari
Принадлежит: Syntroleum Corp

The present invention generally relates to a method for manufacturing phase change material (PCM) pellets. The method includes providing a melt composition including paraffin and a polymer. The paraffin has a melt point between about 10° C. and about 50° C., and more preferably between about 18° C. and about 28° C. In one embodiment, the melt composition includes various additives, such as a flame retardant. The method further includes forming the melt composition into PCM pellets. The method further may include the step of cooling the melt to increase the melt viscosity before pelletizing.

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22-03-2012 дата публикации

Flavonoid hydrogel

Номер: US20120070433A1

There is provided methods for producing a hydrogel comprising conjugates of a hydrogel forming agent and a flavonoid including a method for producing a hydrogel that is capable of adhesion of cells and which comprises enzymatically cross-linked conjugates of a hydrogel forming agent and a flavonoid. There is also provided a method for producing a hydrogel comprising conjugates of a hydrogel forming agent and a flavonoid without the addition of an exogenous peroxide or peroxidase or without the addition of an exogenous peroxide. Hydrogels produced by such methods and methods of using the hydrogels are also described herein.

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29-03-2012 дата публикации

Apparatus and method for producing thermoplastic elastomer, elastomers produced thereby and articles produced from the elastomers

Номер: US20120077889A1
Автор: Neal A. Evans
Принадлежит: Individual

A method for producing thermoplastic elastomer is disclosed and comprises the step of: blending a mixture including particles of vulcanized rubber material and a molten thermoplastic material such that the rubber material is subjected to mechanical shearing forces and the surfaces of the rubber particles undergo homolytic bond scission to form chains of free radicals which cross-link with the thermoplastic material. Apparatus for carrying out the method, elastomers produced by the method and articles produced from the elastomers are also disclosed.

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12-04-2012 дата публикации

Method and apparatus to condition polymers utilizing multiple processing systems

Номер: US20120084993A1
Принадлежит: Gala Industries Inc

A continuous process wherein polymers or polymeric materials can be subjected to multiple sequential processing systems of differing temperatures and process conditions to synergistically enhance the pelletization and conditioning of those polymers and polymeric formulations, dispersions, and solutions. The multiple sequential processing systems include the processes and equipment for mixing/extrusion, pelletization, multiple transportation processes, conditioning, multiple defluidizing processes, and optional post-processing manipulations of pellets formed. Multiple serial and/or parallel conditioning processing systems are disclosed.

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26-04-2012 дата публикации

Compositions and articles comprising polymerizable ionic liquid mixture, and methods of curing

Номер: US20120101184A1
Принадлежит: 3M Innovative Properties Co

Presently described are curable compositions comprising a mixture of at least one (e.g. free-radically) polymerizable ionic liquid and at least one other ethylenically unsaturated monomer, oligomer, or polymer. The polymerizable ionic liquid is characterized as having an air to nitrogen curing exotherm ratio of at least 0.70. Also described are articles and methods of making articles from such curable compositions. A monofunctional polymerizable ionic liquid is also described comprising a non-polymerizable substituted imidazolium cationic group and a polymerizable sulfonate anion.

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03-05-2012 дата публикации

Polymers and Hydrogels

Номер: US20120107369A1
Принадлежит: nanoDERM LLC

Methods and compositions related polymers and hydrogels. In some cases to biodegradable hydrogels for use in medical applications are disclosed. The polymers and hydrogels may be produced from cross-linked dextran and poly(epoxides). The poly(epoxides) may be poloxamers.

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03-05-2012 дата публикации

Immuno-compatible hydrogel system

Номер: US20120107394A1
Принадлежит: Individual

An immuno-compatible hydrogel system is provided that is resistant to protein binding. The hydrogel system is prepared by contacting a hydrogel solution with a cross-linking agent to form a gel, exposing the gel to an aqueous solution comprising a first polyelectrolyte to form a polyelectrolyte-coated hydrogel, exposing the polyelectrolyte-coated hydrogel to a second polyelectrolyte to form a crosslinked matrix and exposing the matrix to conditions which eliminates, or at least reduces, protein binding sites on the matrix.

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17-05-2012 дата публикации

Organosol composition of fluorine-containing polymer

Номер: US20120123031A1
Принадлежит: Daikin Industries Ltd

The present invention provides an organosol composition that is stable even in the case that the PTFE particle content is high. The present invention relates to an organosol composition of PTFE particles, comprising PTFE particles (A), a polymer (B), and an organic solvent (S), wherein (1) the polymer (B) is soluble in the organic solvent (S), (2) the amount of the PTFE particles (A) is not lower than 50% by mass of the total amount of the PTFE particles (A) and the polymer (B), and (3) the precipitation ratio of the PTFE particles after 48 hours is not higher than 60% when the total solids concentration of the PTFE particles (A) and the polymer (B) is 5% by mass.

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24-05-2012 дата публикации

Modified hyaluronic acid polymer compositions and related methods

Номер: US20120128741A1
Принадлежит: Carbylan Biosurgery Inc

The present application provides compositions comprising hyaluronic acid having low levels of functional group modification, mixtures formed by controlled reaction of such lightly modified hyaluronic acid with suitable difunctional or multi-functional crosslinkers, and hydrogel precursor compositions and the resulting hydrogels. The compositions are lightly cross-linked and possess low pro-inflammatory properties when injected in vivo, and can be used as, for example, medical devices, biomedical adhesives and sealants, and for localized delivery of bioactive agents, among other uses.

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24-05-2012 дата публикации

Poly(Ester Amide)s and Poly(Ester Ether Amide)s With Pendant Crosslinkable Functional Groups

Номер: US20120130020A1
Автор: Chih-Chang Chu, Xuan Pang
Принадлежит: CORNELL UNIVERSITY

Amino-acid based poly(ester amide) (PEA) or poly(ester ether amide) (PEEA) polymers having pendant cross-linkable functional groups. The polymers can be cross-linked to form a hydrogel. These polymers can be used in biomedical applications.

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31-05-2012 дата публикации

Carbon nanotube dispersion and method of preparing transparent electrode using the carbon nanotube dispersion

Номер: US20120132862A1
Принадлежит: SAMSUNG ELECTRONICS CO LTD

Provided is a carbon nanotube dispersion including: carbon nanotubes, a solvent, and a dispersant, in which a mutifunctional ethylene oxide-propylene oxide block copolymer acts as the dispersant. The carbon nanotube dispersion provides excellent dispersion stability in aqueous and organic systems. Therefore, the carbon nanotube dispersion is suitable for a transparent electrode.

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07-06-2012 дата публикации

Process of Producing Thermoplastic Starch/Polymer Blends

Номер: US20120139154A1
Автор: Hongbo Li, Michel Huneault
Принадлежит: NATIONAL RESEARCH COUNCIL OF CANADA

A process of producing a thermoplastic starch/polymer blend involves introducing dry starch into a twin-screw extruder at a first location along the extruder, introducing a plasticizer into the twin-screw extruder at a second location along the extruder downstream of the first location to form a starch paste and then gelatinizing the starch paste in the extruder to form thermoplastic starch, and, introducing dry polymer at ambient temperature into the twin-screw extruder at a third location along the extruder downstream of the second location to form a blend with the thermoplastic starch in the extruder.

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19-07-2012 дата публикации

Polyolefin dispersion technology used for resin coated sand

Номер: US20120183705A1
Принадлежит: Dow Global Technologies LLC

A polymer-coated particulate material having: a particulate substrate; and an applied compound, wherein the applied compound coats at least 50% of the surface of the particulate substrate, and wherein, at the time of application, the applied compound includes a dispersion including: a thermoplastic polymer; and a stabilizing compound. In another aspect, embodiments disclosed herein relate to a method of forming a polymer-coated particulate material, the method including the steps of: incorporating a particulate substrate and a dispersion, the dispersion comprising: a thermoplastic polymer; a stabilizing compound; and a dispersion medium selected from the group consisting of an organic solvent, water, and combinations thereof; removing at least a portion of the dispersion medium.

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26-07-2012 дата публикации

Novel injectable chitosan mixtures forming hydrogels

Номер: US20120189704A1
Принадлежит: Chi2Gel Ltd

A chitosan composition which forms a hydrogel at near physiological pH and 37° C., comprising at least one type of chitosan having a degree of acetylation in the range of from about 30% to about 60%, and at least one type of chitosan having a degree of deacetylation of at least about 70% is disclosed. Further disclosed is a chitosan composition which forms a hydrogel at near physiological pH and 37° C., comprising at least one type of chitosan having a degree of deacetylation of at least about 70% and a molecular weight of from 10-4000 kDa, and at least one type of a chitosan having a molecular weight of from 200-20000 Da. Further disclosed are methods of preparation and uses of the chitosan compositions.

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26-07-2012 дата публикации

Viscoelastic gels as novel fillers

Номер: US20120190644A1
Принадлежит: Fidia Farmaceutici SpA

Biomaterials obtainable by mixing the autocrosslinked derivative of hyaluronic acid (ACP) with the derivative (HBC) of hyaluronic acid crosslinked with 1,4-butanediol diglycidyl ether (BDDE) in the weight ratio of between 10:90 and 90:10 as novel fillers.

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02-08-2012 дата публикации

Fluoropolymer emulsion coatings

Номер: US20120196042A1
Автор: Jurgen Hofmans
Принадлежит: EI Du Pont de Nemours and Co

The present invention relates to an aqueous/oil emulsion containing fluoropolymer that is capable of forming thick coatings in a single pass, which coatings after drying and baking are free of cracks.

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09-08-2012 дата публикации

Homogenous dispensing process for an epoxy-composition with high filler content

Номер: US20120202922A1
Автор: Yoke Ai Gan
Принадлежит: Henkel AG and Co KGaA

The present invention relates to a process for the production of a ready-to-use epoxy composition having a filler content of at least 55 vol.-%, relative to the complete ready-to-use epoxy composition, which comprises: providing a liquid A, which comprises at least one epoxy resin, providing a liquid B, which comprises at least one curing agent, providing a solid component C, which comprises at least one filler, wherein in a first step one of the liquids A or B is filled in a mixing container, in a second step the solid component C is deposited on top of the liquid in the mixing container, in a third step the remaining liquid A or B is deposited on top of the solid component C, and in a fourth step the components are mixed to obtain the ready-to-use epoxy composition.

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16-08-2012 дата публикации

Method and device for providing a raw material for the production of pet containers

Номер: US20120208908A1
Автор: Kaj Führer
Принадлежит: KRONES AG

A method and a device for providing a raw material for the production of PET containers, the raw material being mixed from recycled PET (r-PET) and virgin PET (v-PET), where in order to optimize both the plant and the method, v-PET is added in a quantitatively controlled manner to the r-PET prior to the last heating of the r-PET or to the heated r-PET.

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23-08-2012 дата публикации

Polyolefin polylactic acid in-situ blends

Номер: US20120214944A1
Автор: Fengkui Li, John Ashbaugh
Принадлежит: Fina Technology Inc

Polymeric compositions and methods of forming the same are described herein. The methods generally include contacting a polyolefin and a lactide in the presence of a catalyst within an extruder under conditions sufficient to polymerize the lactide and form a polymeric composition including polyolefin and polylactic acid.

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30-08-2012 дата публикации

Process for producing hydrolyzable silyl group-containing fluoropolymer, and composition containing hydrolyzable silyl group-containing fluoropolymer

Номер: US20120220712A1
Принадлежит: Asahi Glass Co Ltd

The present invention has an object to provide a process for producing a hydrolyzable silyl group-containing fluoropolymer which is excellent in storage stability and has a sufficient pot life. At the time of producing a hydrolyzable silyl group-containing fluoropolymer by reacting an isocyanate group of an isocyanate group-containing alkoxysilane to a hydroxy group of a hydroxy group-containing fluoropolymer, the reaction is carried out in the presence a compound containing a specific metal atom at a certain concentration.

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13-09-2012 дата публикации

Aqueous paste for electrochemical cell, electrode plate for electrochemical cell obtained by applying the aqueous paste, and battery comprising the electrode plate

Номер: US20120231337A1
Принадлежит: Individual

The aqueous paste for an electrochemical cell of the present invention comprises an aqueous dispersion for an electrochemical cell that comprises an olefin copolymer (a); an active material; and a conductive assistant, wherein the olefin copolymer (a) has a weight average molecular weight of not less than 50,000 and is at least one kind selected from a random propylene copolymer (a-1) containing 50% by weight to less than 85% by weight of a structural unit derived from propylene; an acid-modified random propylene copolymer (a-2) obtained by modifying the copolymer (a-1) with an acid; and an ethylene-(meth) acrylic acid copolymer (a-3) containing 5% by weight to less than 25% by weight of a structural unit derived from (meth) acrylic acid.

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13-09-2012 дата публикации

Fluorine-containing resin particle dispersion, method for preparing fluorine-containing resin particle dispersion, coating liquid which contains fluorine-containing resin particles, method for preparing coating film which contains fluorine-containing resin particles, coating film which contains fluorine-containing resin particles, molded body, electrophotographic photoreceptor, method for preparing electrophotographic photoreceptor, image forming apparatus, and process cartridge

Номер: US20120231379A1
Принадлежит: Fuji Xerox Co Ltd

Provided is a fluorine-containing resin particle dispersion including: fluorine-containing resin particles, a resin which is not dissolved in at least one solvent in a group of hydroxyl group-containing solvents including an alcohol-based solvent having 1 to 10 carbon atoms, containing no aromatic ring in the molecule structure, and a water-based medium, and which is adhered on the surface of the fluorine-containing resin particles, and at least one solvent, in which the resin is not dissolved, in the group of hydroxyl group-containing solvents, in which the fluorine-containing resin particles having the resin adhered on the surface thereof are dispersed.

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27-09-2012 дата публикации

Alkyd dispersion, and a process for producing the same

Номер: US20120244288A1

The instant invention provides a high-solid, solvent-free alkyd dispersion, and a continuous process for producing the same. The aqueous alkyd dispersion, according to the present invention comprises (a) from 40 to 70 percent by weight of one or more alkyds based on the total weight of the dispersion, wherein each one or more alkyds has an acid value of less than 20 and a molecular weight (Mn) in the range of greater than 1000 Dalton; (b) from less than 10 percent by weight of one or more surfactants, based on the total weight of the dispersion; and (c) from 30 to 55 percent by weight of water, based on the total weight of the dispersion; and the dispersion has an average particle size diameter in the range of 0.05 to 5 μm.

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27-09-2012 дата публикации

Process of preparing an emulsion containing core-sheath-shell polymer particles

Номер: US20120245240A1
Принадлежит: ORGANIK KIMYA SANAYI VE TIC AS

The disclosure relates to processes for preparing an emulsion containing core-sheath-shell polymer particles which, when dried, contain a microvoid which causes opacity in compositions in which they are contained. The particles can serve as binding or opacifying agents in paints, coating, impregnating, and molding compositions primarily, also extended to paper coatings and to some extent in leather, textiles and water based construction materials.

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04-10-2012 дата публикации

Methods of Modifying Agricultural Co-Products and Products Made Therefrom

Номер: US20120252935A1
Принадлежит: Battelle Memorial Institute Inc

In a method of producing a polymer composite, a polymer is provided in a liquid state such as a molten state. A plant material, such as soymeal, is provided that includes protein and carbohydrate. A reactive protein denaturant is also provided. A dispersion of the plant material and the reactive protein denaturant is formed in a matrix of the liquid polymer. The plant material is reacted to bond with the reactive protein denaturant, and the reactive protein denaturant is reacted to bond with the polymer. The polymer is solidified to produce the polymer composite.

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18-10-2012 дата публикации

Polyphosphonate and copolyphosphonate additive mixtures

Номер: US20120264844A1
Принадлежит: FRX Polymers Inc

Disclosed are polymer compositions including polycarbonates, polyphosphonates, copoly(phosphonate carbonate)s, and organic salts and/or silicone containing compounds that exhibit a superior combination of properties compared to prior art.

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18-10-2012 дата публикации

Polymeric materials including a glycosaminoglycan networked with a polyolefin-containing polymer

Номер: US20120264852A1

The present invention relates to polymeric materials including a glycosaminoglycan networked with a polyolefin-containing polymer. The present invention also relates to hydrogels containing the polymeric materials. The present invention further relates to methods of synthesizing the polymeric materials and hydrogels of the present invention.

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08-11-2012 дата публикации

Surgical training aids and methods of fabrication thereof

Номер: US20120282584A1
Принадлежит: University of Western Ontario

The present invention provides surgical training aids formed from hydrogels and adapted to exhibit realistic mechanical properties mimicking those of real organs. Surgical training aids are preferably fabricated by subjecting a concentration of polyvinyl alcohol to freeze-thaw cycles in a mold designed to approximate the shape of an organ, and process parameters are selected to tailor the mechanical properties of the formed hydrogel to those of the organ simulated by the surgical aid. The mechanical properties of the hydrogel forming the surgical training aid may be tailored by incorporating bacterial cellulose and by applying strain during hydrogel formation, thereby producing controlled anisotropy.

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29-11-2012 дата публикации

Silicone oil emulsion, method of producing same, and silicone oil composition

Номер: US20120301524A1
Принадлежит: Dow Corning Toray Co Ltd

To provide a silicone oil emulsion that can improve the properties of cosmetic materials and that contains crosslinked silicone particles in water-dispersed silicone oil droplets; a method of producing this silicone oil emulsion; and a silicone oil composition thereof. This invention is a silicone oil emulsion comprising crosslinked silicone particles having an average particle size of 0.05 to 100 μm in silicone oil droplets that are dispersed in water and that have an average particle size of 0.1 to 500 μm wherein the silicone oil is an alkyl-modified silicone oil that has a silicon-bonded alkyl group having at least 4 carbons and the crosslinked silicone particles preferably have a silicon-bonded alkyl group having at least 4 carbons. Also, a silicone oil composition as provided by removing the water from this silicone oil emulsion.

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29-11-2012 дата публикации

Polymers for Contact Lenses

Номер: US20120302656A1

The present invention relates to a thermoplastic polyurethane contact lens prepared from a mixture comprising: (a) at least one polyethylene glycol; (b) at least one di-isocyanate; and (c) at least one diol of formula (I): wherein n is an integer from 1 to 25; wherein the polyethylene glycol, di-isocyanate and diol are reacted under substantially anhydrous conditions. Further aspects of the invention relate to a process for preparing a contact lens. The invention also relates to a process for preparing a polyurethane xerogel in the form of a molded article, said process comprising the steps of: (i) preparing a reaction mixture comprising at least one polyethylene glycol, at least one di-isocyanate and at least one diol of formula I as described above; (ii) reacting the reaction mixture formed in step (i) under substantially anhydrous conditions to form a polyurethane xerogel; (iii) injection molding the polyurethane xerogel to form a molded article, (iv) hydrating the xerogel molded article to form a contact lens.

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06-12-2012 дата публикации

Porous, low density nanoclay composite

Номер: US20120309245A1
Принадлежит: Individual

Disclosed are porous, low density nanoclay composites that exhibit highly homogeneous microcellular morphology and methods for forming the nanocomposites. The nanocomposites include a three-dimensional matrix having a non-lamellar, generally isotropic cellular structure with little or no macroscopic pores. The nanocomposites also include a gel that may be a noncovalently cross-linked, thermoreversible gel. The nanocomposites may include a binder and/or fibrous reinforcement materials. The nanocomposites may be formed according to a freeze-drying process in which ice crystal growth is controlled to prevent formation of macroscopic pores in the composite materials.

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20-12-2012 дата публикации

Crosslinked Hydrogels and Related Method of Preparation

Номер: US20120321585A1

The present invention provides a method of manufacturing a hydrogel comprising the step of crosslinking a biopolymer using a carbodiimide crosslinker of Formula I wherein at least one of R 1 and R 2 is a functional group that is a bulky organic functional group. R 1 and R 2 can each independently be an optionally substituted saturated or unsaturated functional group selected from the group consisting of an alkyl, a cycloalkyl, a heterocyclic, and an aryl. The bulky organic functional group will slow down the crosslinking reaction of carbodiimide due to the steric effects and/or electronic effects, in comparison to a crosslinking reaction using EDC. Also provided are the hydrogels and ophthalmic devices prepared using the method of the invention and uses thereof.

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10-01-2013 дата публикации

Transparent bacterial cellulose nanocomposite hydrogels

Номер: US20130011385A1
Принадлежит: Axcelon Biopolymers Corp

A transparent polymeric nanocomposite hydrogel is provided, wherein the polymeric nanocomposite hydrogel is made from a water insoluble polymer, i.e. poly(2-hydroxyethyl methacrylate) (PHEMA) or/and crosslinked PHEMA and a water insoluble nanofiber, i.e., bacterial cellulose (BC). Disclosed is a synthetic route for polymeric nanocomposites hydrogels. The preferred polymeric nanocompositions are produced through free radical polymerization of HEMA monomer in the presence of bacterial cellulose with an assistance of ultrasound to enhance the mixing of bacterial cellulose, initiator, and the monomers. The polymeric nanocomposite hydrogel is then formed by immersion of the dry polymeric nanocomposite in water. Disclosed is a high transmittance polymer nanocomposite hydrogel with a preferred BC loading less than 0.1%, water content of about 40% in weight, good mechanical integrity and strength. The disclosed polymer nanocomposite hydrogel and compositions pertain to hydrogel applications, particularly contact lenses and optic components for biosensor.

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17-01-2013 дата публикации

Hydrogel synthesis

Номер: US20130018110A1
Принадлежит: University Of Reading

The invention provides a method for preparing a hydrogel from a hydrophilic polymer having one or more functional groups which are capable of co-reacting in a condensation reaction which method comprises the steps of: (i) preparing a solution of the polymer; (ii) heating the solution to a temperature sufficient for the condensation reaction to take place for a period of time sufficient for the hydrogel to cross-link wherein where the hydrophilic polymer comprises a first and a second hydrophilic polymer, step (i) comprises a step of mixing the hydrophilic polymers to prepare a homogeneous intimate mixture of the polymers; and wherein the heating step (ii) is carried out at a pressure greater than atmospheric pressure. The method of the invention is advantageous because it is relatively low cost, it is a safer procedure with less health & safety concerns, it is carried out in a liquid state and is not limited by film thickness.

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31-01-2013 дата публикации

Process for production of microfibrillated cellulose fiber dispersion

Номер: US20130025920A1
Принадлежит: Mitsubishi Chemical Corp

The invention relates to a method for producing a microfibrillated cellulose fiber dispersion containing microfibrillated cellulose fibers, at least one of a resin and a resin precursor, and an organic solvent, and the method comprises a fibrillation step of fibrillating cellulose fibers in a starting material dispersion containing cellulose fibers, at least one of a resin and a resin precursor, and an organic solvent, to obtain microfibrillated cellulose fibers.

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14-02-2013 дата публикации

Phase separated composite

Номер: US20130041044A1

A composite is disclosed. The composite comprises a first conjugate of a polymer and a first phenol-containing moiety, and a second conjugate of a gelatin or collagen and a second phenol-containing moiety, wherein the polymer is selected so that the first conjugate is less cell-adhesive than the second conjugate, at least one of the first and second conjugates is crosslinked to form a matrix, and the composite comprises discrete regions that are rich in one of said first and second conjugates. A method of forming such composite is also disclosed. The method comprises mixing precursors for the first and second conjugates in a solution for forming said composite, and dispersing a catalyst in the solution to catalyze crosslinking of at least one of the first and second conjugates to form the matrix. The composite may be used to grow cells.

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21-02-2013 дата публикации

Polysaccharide Based Hydrogels

Номер: US20130045182A1
Принадлежит: Individual

Polysaccharide based hydrogel compositions and methods of making and using the same are provided. The subject polysaccharide based hydrogel compositions are prepared by combining a polysaccharide component with a hydrophilic polymer and a cross-linking agent. Also provided are kits and systems for use in preparing the subject compositions.

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07-03-2013 дата публикации

Method to form an aqueous dispersion of an ionomer

Номер: US20130059972A1
Принадлежит: EI Du Pont de Nemours and Co

Disclosed is a method for forming an aqueous dispersion of an ionomer composition comprising mixing a solid ionomer composition with water heated to a temperature from about 80 to about 90° C., the solid ionomer composition comprising an ethylene acid copolymer comprising about 18 to about 30 weight % of copolymerized units of acrylic acid or methacrylic acid, based on the total weight of the parent acid copolymer, the acid copolymer having a melt flow rate from about 200 to about 1000 g/10 min., wherein about 50% to about 70% of the total carboxylic acid groups of the copolymer are neutralized to carboxylic acid salts comprising sodium cations.

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21-03-2013 дата публикации

Superabsorbent polymers and methods of making the same

Номер: US20130072645A1
Принадлежит: Evonik Stockhausen GmbH

The invention relates to producing a superabsorbent polymer comprising (I) producing a (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers and/or (meth)acrylic acid oligomers; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising a low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase by forming crystals to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.

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28-03-2013 дата публикации

COLOURED POLYMER PARTICLES

Номер: US20130075664A1
Принадлежит: Merck Patent GmBH

This invention relates to coloured polymer particles prepared by a reverse emulsion solvent removal process, electrophoretic fluids comprising such particles, and electrophoretic display devices comprising such fluids. 118-. (canceled)19. A process for the preparation of coloured polymer particles for use in electrophoretic devices , comprising the steps ofa) forming a reverse emulsion comprising optionally at least one polymer, at least one, optionally pre-polymerised, dye, at least one polar solvent, at least one non-polar solvent, and at least one optionally charged surfactant,b) removing the polar solvent or polar solvents by evaporative methods andc) optionally removing the non-polar solvent or non-polar solvents.20. The process according to claim 19 , wherein the reverse emulsion of step a) is prepared by al) forming a polar phase by mixing optionally at least one polymer claim 19 , at least one claim 19 , optionally pre-polymerised claim 19 , dye claim 19 , and at least one polar solvent claim 19 , a2) forming a non-polar phase by mixing at least one non-polar solvent claim 19 , and at least one surfactant claim 19 , a3) combining the polar phase and the non-polar phase claim 19 , and a4) homogenising the combined phases to form the reverse emulsion.21. The process according to claim 19 , wherein the dye is water-soluble or water-dispersible.22. The process according to claim 19 , wherein the dye comprises a chromophoric group and optional groups to modify physical properties and/or optionally charged groups and/or optionally linker groups and/or optionally polymerisable groups.23. The process according to claim 19 , wherein amaranth claim 19 , basic blue 41 methacrylate claim 19 , and/or acid yellow 9 are used as dyes.24. The process according to claim 19 , wherein the polymer of step a) is hydrophilic and/or charged.25. The process according to claim 19 , wherein the polar solvent used in step a) is water claim 19 , low molecular weight alcohol claim 19 , ...

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11-04-2013 дата публикации

Hydrophilic gels from polyurethane-based photoinitiators

Номер: US20130089582A1
Принадлежит: Coloplast AS

The present invention relates to the use of polymeric photoinitiators based on polyalkyletherurethane backbones in the production of hydrophilic gels, in particular hydrogels. The invention relates to methods for manufacturing hydrophilic gels using said polymeric photoinitiators, and the hydrophilic gels thus obtained.

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02-05-2013 дата публикации

Methods and compositions for textile layers and coatings

Номер: US20130109773A1

A method for preparing a solid composite material comprising a structural polymer matrix and a thermo-responsive hydrogel involves forming a substantially homogeneous blend of a cross-linkable compound and monomer, oligomer or polymer particles in a blended aqueous liquid, inducing the cross-linkable compound to cross-link to form the thermo-responsive hydrogel and forming the structural polymer matrix from the structural polymer by a further induction means.

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23-05-2013 дата публикации

Water-absorbing resin

Номер: US20130130017A1
Принадлежит: Sumitomo Seika Chemicals Co Ltd

Object: The main object of the present invention is to provide a water-absorbent resin that has an appropriate absorption capacity and excellent flow-through properties and that is suitably used in an absorbent article applied to a hygienic material, etc. Means for Achieving the Object: A water-absorbent resin formed by agglomerating primary particles according to a reversed-phase suspension polymerization method, the primary particles being obtained by polymerizing at least one water-soluble ethylenically unsaturated monomer in the presence of a dispersion stabilizer according to a reversed-phase suspension polymerization method, the primary particles having a median particle size of 100 to 250 μm, and the water-absorbent resin having a water-retention capacity of saline solution of 30 g/g or less.

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06-06-2013 дата публикации

Crosslinked cellulosic polymers

Номер: US20130142763A1
Принадлежит: EMPIRE TECHNOLOGY DEVELOPMENT LLC

Crosslinked cellulosic polymers, crosslinked cellulosic polymer hydro-gels, and methods for their synthesis and use are described. The crosslinked cellulosic polymers include one or more cellulosic polymers and a one or more crosslinkers that crosslinks the one or more cellulosic polymers together. The crosslinking can be facilitated with a crosslinking agent capable of linking with a monomer the cellulosic polymer and crosslinking the cellulosic polymer intermoleculerly and/or intramolecularly. Crosslinked cellulosic polymers are well adapted for use in cell and tissue growth in vivo and in vitro. The crosslinked cellulose polymers may also be used as wound care devices.

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06-06-2013 дата публикации

Asphalt composition containing ground tire rubber

Номер: US20130143985A1
Принадлежит: Blacklidge Emulsions Inc

We disclose a method of making an asphalt composition containing large quantities of ground tire rubber. Over 20% GTR by weight can be used in the asphalt composition without the GTR settling out. The method comprises a series of heating and blending and using a GTR stabilizer.

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20-06-2013 дата публикации

Process for producing cellulose shaped articles

Номер: US20130154139A1
Принадлежит: Innovia Films Ltd

The present invention provides a process for producing cellulose shaped articles in which a) cellulose is at least partly dissolved at a temperature of about 100° C. or lower in a dope comprising an ionic liquid and a cosolvent to form a cellulose solution, wherein said cosolvent comprises a polar aprotic component, and b) cellulose shaped articles are cast from the cellulose solution.

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20-06-2013 дата публикации

METHOD FOR PRODUCING THERMOPLASTIC RESIN COMPOSITION

Номер: US20130156982A1
Принадлежит: THE YOKOHAMA RUBBER CO., LTD.

A method for producing a thermoplastic resin composition, comprising the steps of: (I) melt-kneading (A) acid anhydride-modified or epoxy-modified rubber with (B) ethylene-vinylalcohol copolymer resin to prepare a first resin composition in which (A) acid anhydride-modified or epoxy-modified rubber is dispersed in (B) ethylene-vinylalcohol copolymer resin, (II) crosslinking (C) crosslinkable elastomer while melt-kneading the crosslinkable elastomer with (D) polyamide resin to prepare a second resin composition in which crosslinked elastomer particles are dispersed in (D) polyamide resin, and (III) melt-mixing together the first resin composition with the second resin composition. The thermoplastic resin composition has excellent gas barrier properties, low-temperature durability, and fatigue resistance. 1. A method for producing a thermoplastic resin composition , comprising the steps of:(I) melt-kneading (A) acid anhydride-modified or epoxy-modified rubber with (B) ethylene-vinylalcohol copolymer resin to prepare a first resin composition in which (A) acid anhydride-modified or epoxy-modified rubber is dispersed in (B) ethylene-vinylalcohol copolymer resin,(II) crosslinking (C) crosslinkable elastomer while melt-kneading the crosslinkable elastomer with (D) polyamide resin to prepare a second resin composition in which crosslinked elastomer particles are dispersed in (D) polyamide resin, and(III) melt-mixing together the first resin composition with the second resin composition.2. The method for producing a thermoplastic resin composition according to claim 1 , in which (A) acid anhydride-modified or epoxy-modified rubber is selected from the group consisting of ethylene-α-olefin copolymers and the acid anhydride-modified products and epoxy-modified products of their derivatives claim 1 , ethylene-unsaturated carboxylic acid copolymers and acid anhydride-modified products and epoxy-modified products of their derivatives claim 1 , and combinations thereof.3. The ...

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04-07-2013 дата публикации

Process for superabsorbent polymer and crosslinker composition

Номер: US20130172180A1
Принадлежит: Evonik Stockhausen LLC

The present invention further relates to a process to make a superabsorbent polymer comprising the steps of a) preparing a neutralized monomer solution comprising a polymerizable monomer selected from unsaturated acid groups-containing monomers, ethylenically unsaturated carboxylic acid anhydride, salts, or derivatives thereof and a caustic agent selection from an alkali agent, wherein the polymerizable monomer is neutralized to from about 50 mol % to about 85 mol %; b) forming a crosslinker monomer mixture by adding an internal crosslinker composition to the neutralized monomer solution wherein the internal crosslinking composition is the reaction product of a stoichiometric excess of amine with a glycidyl compound, wherein the internal crosslinker composition has a residual amount of glycidyl compounds of less than about 500 ppm based on the mass of the internal crosslinker composition; and c) polymerizing the crosslinker monomer mixture to make a superabsorbent polymer.

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04-07-2013 дата публикации

WATER-BASED RESIN COMPOSITION AND ARTICLES MADE THEREFROM

Номер: US20130172445A1
Принадлежит: ALLEGIANCE CORPORATION

An aqueous elastomer dispersion includes a dispersed phase and an aqueous phase. The dispersed phase includes an elastomer including curable aliphatic conjugated-diene elastomers, such as polyisoprene, and a minor amount of at least one additive. The aqueous phase includes water and other optional components in either a soluble state or a dispersion state. The aqueous elastomer dispersion may be prepared by dissolving an elastomer, such as rubber, and additives in a solvent mixture and then converting the resulting solution into an aqueous emulsion. The aqueous emulsion is concentrated and the solvent is stripped from it to yield a dilute latex. The dilute latex that is obtained is concentrated again. Articles made from the aqueous elastomer dispersion include medical gloves, condoms, probe covers, dental dams, finger cots, catheters and the like. 119-. (canceled)20. A method of preparing an aqueous elastomer dispersion , comprising the steps of:preparing an elastomer/accelerator solution comprising an elastomer, an accelerator, and a solvent system;emulsifying the elastomer/accelerator solution to form an emulsion;concentrating the emulsion to form a concentrated emulsion;removing substantially all of the solvent system from the concentrated emulsion to form a substantially solvent-free dispersion; andoptionally concentrating the substantially solvent-free dispersion.21. The method of claim 20 , wherein the elastomer is selected from the group consisting of polyisoprene claim 20 , polychloroprene claim 20 , styrene-butadiene copolymers claim 20 , acrylonitrile-butadiene copolymers claim 20 , styrene block copolymers claim 20 , and butyl rubber.22. The method of claim 21 , wherein the elastomer has a molecular weight of about 100 claim 21 ,000 to about 3 claim 21 ,000 claim 21 ,000.23. The method of claim 20 , wherein the solvent system includes a first solvent and second solvent.24. The method of claim 23 , wherein the elastomer is soluble in the first solvent ...

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08-08-2013 дата публикации

Filler composition for tissue reinforcement

Номер: US20130203856A1

The present invention relates to a filler composition for tissue reinforcement, including hyaluronic acid and alkylene diamine crosslinked hydrogel. The filler composition exhibits the positive physical properties required for tissue reinforcement, such as biocompatibility and swelling ability, as well as useful effects in that the same can remain in vivo for a long time.

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29-08-2013 дата публикации

Method for producing slurry composition

Номер: US20130225741A1
Автор: Kenichi Ootsuki
Принадлежит: Sekisui Chemical Co Ltd

The present invention provides a method for producing a slurry composition which realizes excellent dispersibility through simple steps and can maintain high dispersibility over a long term. In addition, the present invention provides a slurry composition produced using this method. The present invention provides s method for producing a slurry composition containing an inorganic powder, a polyvinyl acetal resin, and an organic solvent, the method comprising the steps of: mixing an inorganic powder, a mixed polyvinyl acetal resin (A) and an organic solvent for inorganic dispersion to prepare an inorganic dispersion; mixing a polyvinyl acetal resin (B) and an organic solvent for resin solution to prepare a resin solution; and adding the resin solution to the inorganic dispersion, the mixed polyvinyl acetal resin (A) including a polyvinyl acetal resin (a1) having a hydroxy group content of 20 to 40 mol % and a polyvinyl acetal resin (a1) having a hydroxy group content of 28 to 60 mol %, the polyvinyl acetal resin (a1) and the polyvinyl acetal resin (a2) being in a relation represented by the following formula (1): Y−X ≧5   (1) wherein X represents the hydroxy group content (mol %) in the polyvinyl acetal resin (a1), and Y represents the hydroxy group content (mol %) in the polyvinyl acetal resin (a2), the polyvinyl acetal resin (B) having a polymerization degree of 800 to 4200, and an amount of the mixed polyvinyl acetal resin (A) used in the step of preparation of the inorganic dispersion being 0.1 to 20 parts by weight relative to 100 parts by weight of the inorganic powder.

Подробнее
05-09-2013 дата публикации

Controlling Morphology of Block Copolymers

Номер: US20130231438A1
Автор: Ginam Kim, Steven Swier
Принадлежит: Dow Corning Corp

A method for controlling morphology of a silicone organic block copolymer includes adding an MQ resin to the silicone organic block copolymer and annealing. The method is useful for forming thin films, which are useful in electronic device fabrication. The method is also useful for forming adhesives, release coatings, and reversible elastomers.

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12-09-2013 дата публикации

Methods and materials for removing metals in block copolymers

Номер: US20130233827A1
Принадлежит: AZ Electronic Materials Luxembourg SARL

The present invention relates to a method for treating a block copolymer solution, wherein the method comprises: providing a solution comprising a block copolymer in a non aqueous solvent; and, treating the solution to remove metals using an ion exchange resin. The invention also relates to a method of forming patterns using the treated block copolymer.

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19-09-2013 дата публикации

Injectable chitosan mixtures forming hydrogels

Номер: US20130244972A1
Принадлежит: MOR RESEARCH APPLICATIONS LTD

A chitosan composition which forms a hydrogel at near physiological pH and 37° C., comprising at least one type of chitosan having a degree of acetylation in the range of from about 30% to about 60%, and at least one type of chitosan having a degree of deacetylation of at least about 70% is disclosed. Further disclosed is a chitosan composition which forms a hydrogel at near physiological pH and 37° C., that includes at least one type of chitosan having a degree of deacetylation of at least about 70% and a molecular weight of from 10-4000 kDa, and at least one type of a chitosan having a molecular weight of from 200-20000 Da. Further disclosed are methods of preparation and uses of the chitosan compositions.

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24-10-2013 дата публикации

Method for the Continuous Production of Water Absorbent Polymer Particles

Номер: US20130276325A1
Принадлежит: BASF SE

A process for continuously preparing water-absorbing polymer beads, comprising the drying of a polymer gel on a forced-air belt dryer, the water content of the polymer gel being used to control the forced-air belt dryer during or after the drying.

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14-11-2013 дата публикации

Resin blend for melting process

Номер: US20130302615A1
Принадлежит: LG Chem Ltd

The present invention relates to a resin blend for a melting process, to a method for preparing same, and to a resin-molded article having a specific layer separation structure, the resin blend comprising a first resin and a second resin, wherein the second resin comprises a polymer resin having an organic functional group containing one or more oxygen atoms, and has a melt viscosity difference of 0.1 to 3,000 pa*s with respect to the first resin at a shear rate of 100 to 1,000 s −1 and a processing temperature of the resin blend. The resin blend allows a resin-molded article to have enhanced mechanical properties and surface hardness, and exhibits the effects of reducing a processing time, increasing productivity and reducing production cost by eliminating an additional surface coating step.

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21-11-2013 дата публикации

Glucans

Номер: US20130310338A1
Автор: Rolf Engstad, Thor Nokland
Принадлежит: BIOTEC PHARMACON ASA

The present invention relates to a glucan having a weight average molar mass of 15,000 to 50,000 g/mol on a single chain basis and a weight average molar mass in aqueous solution on an aggregate basis of 4 to 20×10 5 g/mol and existing in gel form in aqueous solution at a concentration ≧1% at 25° C. and neutral pH and having a melting temperature (gel to sol) of 30 to 44° C. when the glucan is dissolved in water at a concentration of 2 %, methods for the production thereof, medical uses thereof, physical supports having the glucan applied thereto or impregnated thereon and in vitro methods of proliferation of skin cells which comprise contacting a population of skin cells with the glucan.

Подробнее
28-11-2013 дата публикации

Electrospinning of ptfe with high viscosity materials

Номер: US20130316103A1
Принадлежит: Zeus Industrial Products Inc

An improved process for forming a PTFE mat is described. The process includes providing a dispersion with PTFE, a fiberizing polymer and a solvent wherein said dispersion has a viscosity of at least 50,000 cP. An apparatus is provided which comprises a charge source and a target a distance from the charge source. A voltage source is provided which creates a first charge at the charge source and an opposing charge at the target. The dispersion is electrostatically charged by contact with the charge source. The electrostatically charged dispersion is collected on the target to form a mat precursor which is heated to remove the solvent and the fiberizing polymer thereby forming the PTFE mat.

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28-11-2013 дата публикации

Perfluoroelastomer gels

Номер: US20130317162A1
Принадлежит: SOLVAY SA

Perfluoroelastomeric gel having the following properties: appearance: transparent gelatinous solid; water content between 10% and 90% by weight; density between 1.1 and 2.1 g/cm 3 ; said gel satisfies the following test: dried in a stove at 90° C. until a constant weight gives curable perfluoroelastomers.

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26-12-2013 дата публикации

Plant derived cell culture material

Номер: US20130344036A1
Принадлежит: UPM Kymmene Oy

The present invention relates material that is useful in culturing and transferring cells as well as delivering cells. The material comprises plant derived cellulose nanofibers or derivatives thereof, wherein the cellulose nanofibers are in a form of a hydrogel or membrane. The invention also provides methods for producing these materials and compositions and uses thereof.

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26-12-2013 дата публикации

Methods for preparation of novel graft copolymers

Номер: US20130345367A1
Принадлежит: University of Western Ontario

The present invention relates to novel graft copolymers of functionalized poly(isoolefin-co-conjugated diolefin, and a process of preparing such graft copolymers. The present invention also relates to a method of preparing functionalized copolymers of isoolefins and conjugated diolefins.

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26-12-2013 дата публикации

Carboxylation of poly-/oligothiophenes

Номер: US20130345440A1
Принадлежит: Bayer Intellectual Property GmbH

The present invention relates to a process for carboxylation of poly/oligothiophenes using CO 2 .

Подробнее
02-01-2014 дата публикации

MODIFIED SILICA PARTICLES

Номер: US20140000152A1
Принадлежит: AKZO NOBEL CHEMICALS INTERNATIONAL B.V.

The present invention relates to modified colloidal silica particles covalently linked to at least one polyalkyleneoxy moiety having at least about 3 alkyleneoxy units. The invention also relates to an aqueous dispersion thereof, and a method of producing such modified silica particles. The invention further relates to use of the modified colloidal silica particles as emulsifiers for paper sizing agents, agriculturally active ingredients and asphalts, as well as dispersant for oil spills. 1. A modified colloidal silica particle covalently linked to at least one polyalkyleneoxy moiety having at least 3 alkyleneoxy units , wherein said polyalkyleneoxy moiety is terminated by an alkyl group.2. The modified silica particle according to claim 1 , wherein said modified colloidal silica particle is covalently linked by an alkoxy silane to said at least one polyalkyleneoxy moiety.3. The modified silica particle according to claim 1 , wherein said modified colloidal silica particle is covalently linked by a siloxane bond formed by condensation of a silane to said at least one polyalkyleneoxy moiety.4. The modified silica particle according to claim 3 , wherein said modified colloidal silica particle is covalently linked by a siloxane bond formed by condensation of a silane containing at least one polyalkyleneoxy moiety.5. The modified silica particle according to claim 1 , wherein said particle is not modified by an ethylenically unsaturated group or attached to a photosensitive lithographic printing plate.6. The modified silica particle according to claim 1 , wherein said polyalkyleneoxy moiety is polypropylene glycol or polyethylene glycol or copolymers thereof.7. The modified silica particle according to claim 1 , wherein said polyalkyleneoxy moiety is terminated by a methyl group.8. The modified silica particle according to claim 1 , wherein the surface density of polyalkyleneoxy moiety to silica particle is from 0.1 to 4 μmoles/msilica surface.9. The modified silica ...

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09-01-2014 дата публикации

Methods and devices for continuous production of polymeric dispersions

Номер: US20140011914A1
Принадлежит: Solutia Inc

The present invention is directed to the use of continuous extrusion devices to form high quality polymer dispersions. Screw extruder devices of the present invention inject water into a zone of high pressure, temperature, and shear to cause the rapid inversion of a weld in less than, for example, one minute, which compares very favorably with conventional batch methods, which can take, for example, two or more hours to complete an inversion. This rapid inversion—a surprising result given the extended time inversion requires in batch processes—allows for the continuous production of polymer dispersions.

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23-01-2014 дата публикации

Electric conductive polymer aqueous suspension and method for producing the same, electric conductive organic material, and solid electrolytic capacitor and method for producing the same

Номер: US20140022706A1
Принадлежит: NEC Tokin Corp

An electric conductive polymer aqueous suspension is prepared by dispersing an electric conductive polymer powder whose surface is doped with a polyacid in which the number of anion groups is 50% or more and 99% or less with respect to the number of repeating units of the polyacid. By using the electric conductive polymer aqueous suspension, an organic material excellent in adhesiveness to a substrate and humidity resistance, and high in conductivity, as well as a solid electrolytic capacitor low in ESR and excellent in reliability in a high humidity atmosphere, and a method for producing the same can be provided.

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23-01-2014 дата публикации

System and Method for High Throughput Preparation of Rubber-Modified Asphalt Cement

Номер: US20140024747A1
Автор: Theodore P. Flanigan
Принадлежит: Wright Asphalt Products Co

This invention encompasses rubber modified asphalt cement compositions, as well as systems, apparatuses, methods for preparing, as well as methods for using rubber-modified asphalt cement compositions.

Подробнее
30-01-2014 дата публикации

Coating composition and articles made therefrom

Номер: US20140030535A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides an aqueous dispersion, a coating composition, coating layers and coated article made therefrom. The coating composition according to the present invention comprises: (1) the inventive aqueous dispersion comprising the melt blending product of: (a) from 50 to 99 percent by weight of one or more polyethylene terephthalate resins, based on the total solid content of the dispersion; (b) from 1 to 50 percent by weight of one or more stabilizing agents comprising at least one second polyester, based on the total solid content of the dispersion, wherein said second polyester (i) has a carboxylic acid group and an acid number equal to or greater than 15, based on the solid content of the second polyester; or (ii) is a self-dispersing sulfopolyester; (c) one or more neutralizing agents; and (d) from 15 to 90 percent by weight of water, based on the total weight of the dispersion; wherein said dispersion has a solid content of 10 to 85 percent, based on the total weight of the dispersion; and (2) optionally one or more cross-linking agents.

Подробнее
06-02-2014 дата публикации

Hybrid matrix for fiber composite materials

Номер: US20140039118A1
Принадлежит: Henkel AG and Co KGaA

A fiber composite material obtainable by (a) mixing the components of a multi-component agent immediately before use, wherein component A of the multi-component agent contains at least one compound having two or more isocyanate groups, component B of the multi-component agent contains at least one compound which has at least two reactive groups selected from hydroxyl groups, thiol groups, primary amino groups and secondary amino groups and is simultaneously free from epoxy groups, and at least one of the components of the multi-component agent contains at least one epoxide prepolymer, (b) introducing the resulting application preparation into a mold in which fibers and optionally further additives are present, the resulting mixture containing at least one latent hardener for epoxide prepolymers, (c) pre-curing the resulting mixture at a temperature from 5° C. to 90° C., and (d) then finally curing the pre-cured fiber composite material at temperatures from 100° C. to 240° C., wherein the fiber composite material being removed from the mold after step (c) or step (d).

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13-02-2014 дата публикации

BUTYL IONOMER LATEX

Номер: US20140045986A1
Принадлежит: LANXESS INC.

The invention relates to a latex composition wherein the latex composition comprises a butyl ionomer or partially halogenated butyl rubber ionomer. The latex composition is formed by dissolving the butyl ionomer in a suitable solvent, emulsifying the polymer in the solvent, adding water and optionally a minor amount of a suitable surfactant system to the emulsion and concentrating the emulsion to remove the water. The advantages of butyl ionomer latex include lower emulsifier levels, increased latex stability, improved interaction and adhesion to polar substrates and surfaces. Through the judicious choice of emulsifiers and/or washing to remove excess emulsifier a film with enhanced non-extractable polymeric antimicrobial function can be created. These properties of ionomer latex are useful in coatings, dipped goods and sponge applications. 1. A butyl rubber latex composition comprising a butyl rubber ionomer made from a halogenated butyl rubber reacted with a nitrogen or phosphorous based nucleophile emulsified in water.2. The composition according to claim 1 , wherein the composition further comprises a surfactant concentration in the range of from 1 to 30 wt %.3. The composition according to claim 2 , wherein the ionomeric content of the ionomer is greater than 0.1 mol %.4. The composition according to claim 2 , wherein the emulsion is stable at room temperature.5. The composition according to claim 2 , wherein the emulsion has a solids content in the range of from 7 to 80 wt %.6. A butyl rubber latex composition comprising a butyl rubber ionomer made from a halogenated butyl rubber reacted with a nitrogen or phosphorous based nucleophile having an ionomeric content of greater than 0.1 mol % emulsified in water to form a stable emulsion at room temperature having a solids content in the range of from 7 to 80 wt %.7. The composition according to claim 6 , wherein the surfactant concentration of the ionomer is in the range of from 1 to 30 wt %.8. A process for ...

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27-02-2014 дата публикации

Aqueous Epoxy and Organo-Substituted Branched Organopolysiloxane Emulsions

Номер: US20140058012A1
Принадлежит: Wacker Chemical Corp

Aqueous emulsions of epoxy- and organo-substituted, branched organopolysiloxanes are prepared by emulsifying the latter in water with the aid of a dispersing agent. The emulsions are storage stable and are useful in multi-component coating, adhesive, and binder systems.

Подробнее
27-02-2014 дата публикации

Preparation method of superabsorbent polymer

Номер: US20140058048A1
Принадлежит: LG Chem Ltd

The present invention relates to a method of preparing a superabsorbent polymer, including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; adding a surface cross-linking agent to the milled polymer; and elevating the temperature of the polymer including the surface cross-linking agent at a speed of 3° C./min to 15° C./min, and carrying out a surface cross-linking reaction at 100° C. to 250° C.

Подробнее
13-03-2014 дата публикации

Method for Obtaining an Emulsion Containing an Internal Hydrophobic Phase Dispersed in a Continuous Hydrophilic Phase

Номер: US20140073706A1

The invention relates to a method for producing an emulsion including a hydrophobic internal phase dispersed in a hydrophilic continuous phase, of the medium internal phase (MIPE) or high internal phase (HIPE) type, which has an internal phase percentage higher than 55%, comprising the following steps: a) producing an oil-in-water emulsion composition that has a hydrophobic phase/hydrophilic phase volume ratio of at least 5/95, including a step for incorporating cellulose nanocrystals into said hydrophilic phase, and a step for forming the emulsion by dispersing said hydrophobic phase in said hydrophilic phase, and b) producing an emulsion that has an internal phase percentage higher than 55%, including: b.1) a step for adding a volume of hydrophobic phase to the emulsion composition produced in Step a), and stirring the mixture thereby produced, and/or b.2) a step for concentrating the emulsion composition produced in Step a), by removing at least part of said hydrophilic phase.

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27-03-2014 дата публикации

Nanotube dispersants and dispersant free nanotube films therefrom

Номер: US20140083752A1

A degradable polymeric nanotube (NT) dispersant comprises a multiplicity of NT associative groups that are connected to a polymer backbone by a linking group where there are cleavable groups within the polymer backbone and/or the linking groups such that on a directed change of conditions, bond breaking of the cleavable groups results in residues from the degradable polymeric NT dispersant in a manner where the associative groups are uncoupled from other associative groups, rendering the associative groups monomelic in nature. The degradable polymeric nanotube (NT) dispersant can be combined with carbon NTs to form a NT dispersion that can be deposited to form a NT film, or other structure, by air brushing, electrostatic spraying, ultrasonic spraying, ink-jet printing, roll-to-roll coating, or dip coating. The deposition can render a NT film that is of a uniform thickness or is patterned with various thicknesses. Upon deposition of the film, the degradable polymeric nanotube (NT) dispersant can be cleaved and the cleavage residues removed from the film to yield a film where contact between NTs is unencumbered by dispersants, resulting in highly conductive NT films.

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03-04-2014 дата публикации

Emulsion Polymerisation Method

Номер: US20140093547A1
Принадлежит:

The invention relates to a method for the production of silicone in water emulsions by emulsion polymerisation. The emulsion contains particles of an organopolysiloxane polymer having an average particle diameter of less than 1 μm. The method comprises: —combining a silanol end-blocked organosiloxane starting polymer, water, and a surfactant; said starting polymer having a viscosity of at least 2 Pa·s preferably at least 2.5 Pa·s preferably at least 3.5 Pa·s preferably at least 4 Pa·s and up to 150 Pa·s; —emulsifying the starting polymer by agitating or shearing the ingredients; —polymerizing the starting polymer to form a longer chain silanol end-blocked organopolysiloxane polymer; wherein at least a portion of said polymerising step is performed at a temperature of less than or equal to 16° C. preferably less than or equal to 15° C. 2. A method as claimed in claim 1 , wherein the viscosity of the starting polymer is up to 100 Pa·s.3. A method as claimed in claim 1 , wherein the surfactant is an anionic surfactant.4. A method as claimed in claim 1 , wherein the polymerizing step is started at a temperature of at least 18° C. and then lowered to said temperature of less than or equal to 16° C.5. A method as claimed in claim 1 , wherein the portion of the polymerizing step performed at the temperature of less than or equal to 16° C. is also performed at a temperature more than 2° C.6. A method as claimed in claim 1 , wherein the portion of the polymerizing step performed at less than or equal to 16° C. is at least 30% of the total polymerization time.7. A method as claimed in claim 1 , wherein the polymerizing step takes place for 1 to 24 hours.8. A method as claimed in claim 1 , wherein the average particle diameter is less than 0.8 μm.9. A method as claimed in claim 1 , wherein the method is a continuous process and the starting polymer claim 1 , surfactant and water are continuously fed to a high shear mixer in such proportions so as to form a viscous oil in water ...

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10-04-2014 дата публикации

Fluorinated surfactants and stabilization of polytetrafluoroethylene (ptfe) particles in hollow fiber spin solutions

Номер: US20140096682A1
Принадлежит: Phillips 66 Co

Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide. The liquid sorbent contacts the gas mixture for transfer of the carbon dioxide from the gas mixture to the liquid sorbent. Contacting of the sorbent with the gas mixture and/or desorption of the carbon dioxide from the liquid sorbent utilize hollow fiber contactors that have permeable walls and incorporate particles distinct from a remainder of the walls to influence wetting properties of the contactors. Polytetrafluoroethylene particles may be homogenously disposed throughout hollow fiber contactors to influence wetting properties of the contactors.

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06-01-2022 дата публикации

Bioadhesive for Soft Tissue Repair

Номер: US20220001074A1

The present invention provides compositions and methods for repair and reconstruction of defects and injuries to soft tissues. Some aspects of the invention provide tissue adhesives comprising a hybrid hydrogel by using a naturally derived polymer, gelatin and a synthetic polymer, polyethylene glycol, wherein the hydrogel is biocompatible, biodegradable, transparent, strongly adhesive to corneal tissue, and have a smooth surface and biomechanical properties similar to the cornea.

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04-01-2018 дата публикации

DENSE HYDROGELS

Номер: US20180000989A1
Принадлежит:

There is provided a method for preparing a dense hydrogel comprising an at least partially gelled hydrogel, placing the at least partially gelled hydrogel in fluid communication with an end of a capillary, and driving the at least partially gelled hydrogel into the capillary to form a dense hydrogel. There is also provided a system for preparing the dense hydrogel comprising a capillary having a bore; and a driver in communication with an end of the capillary for driving an at least partially gelled hydrogel into the bore of the capillary to form a dense hydrogel. 196-. (canceled)97. A system for preparing a dense hydrogel , the system comprising:a capillary having a first open end, a second open end and a bore defined therebetween;a driver in communication with the second open end of the capillary, the driver arranged to selectively exert:a negative pressure to drive a hydrogel into the capillary to form a dense hydrogel in the capillary, anda positive pressure to drive the dense hydrogel out of the capillary.98. The system of claim 97 , wherein the driver is a manual or an automatic pump.99. The system of claim 97 , further comprising the hydrogel claim 97 , the hydrogel being a biocompatible material.100. The system of claim 99 , wherein the hydrogel is selected from collagen claim 99 , hyaluronan claim 99 , chitosan claim 99 , fibrin claim 99 , gelatin claim 99 , alginate claim 99 , agarose claim 99 , polyacrylamide claim 99 , poly(ethylene glycol) claim 99 , poly(vinyl alcohol) claim 99 , polyacrylic acid claim 99 , hydroxyl ethyl methacrylate claim 99 , polyanhydrides claim 99 , poly(propylene fumarate) claim 99 , and mixtures of the same.101. The system of claim 99 , wherein the hydrogel is collagen type I.102. The system of claim 99 , wherein the first open end of the capillary can be brought into contact with the hydrogel.103. The system of claim 99 , wherein the hydrogel includes at least one bioactive agent.104. The system of claim 102 , wherein the at ...

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02-01-2020 дата публикации

INTERPENETRATING NETWORKS WITH COVALENT AND IONIC CROSSLINKS

Номер: US20200000967A1
Принадлежит:

The invention features a composition comprising a self-healing interpenetrating network hydrogel comprising a first network and a second network. The first network comprises covalent crosslinks and the second network comprises ionic or physical crosslinks. For example, the first network comprises a polyacrylamide polymer and second network comprises an alginate polymer. 136.-. (canceled)37. An interpenetrating networks hydrogel comprising a first network and a second network , wherein:the first network comprises a covalently crosslinked polymer selected from the group consisting of polyacrylamide, poly(vinyl alcohol), poly(ethylene oxide) and its copolymers, polyethylene glycol (PEG), methacrylated PEG, and polyphosphazene; andthe second network comprises an ionically crosslinked polymer selected from the group consisting of alginate, chitosan, and agarose; andthe covalently crosslinked polymer has a crosslinking density that is derived from a weight ratio between a covalent crosslinking agent and a monomer of the covalently crosslinked polymer of between about 0.031 wt. % and 0.124 wt. % based on the monomer weight.38. The hydrogel of claim 37 , wherein the first network and the second network are covalently coupled.39. The hydrogel of claim 37 , wherein the first network comprises polyacrylamide or polyethylene glycol (PEG) and wherein the second network comprises alginate.40. The hydrogel of claim 37 , wherein the covalent crosslinking agent is selected from the group consisting of N claim 37 ,N-methylenebisacrylamide (MBAA) claim 37 , a methacrylate crosslinker claim 37 , N claim 37 ,N′-dicyclohexylcarbodiimide (DCC) claim 37 , 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (ECC) claim 37 , N-hydroxysuccinimide claim 37 , N-hydroxysulfosuccinimide claim 37 , glutaraldehyde claim 37 , and a transglutaminase.41. The hydrogel of claim 37 , wherein the covalently crosslinked polymer has a crosslinking density that is derived from a weight ratio between a covalent ...

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05-01-2017 дата публикации

CRYSTALLINE CELLULOSE GEL-BASED CRYPTANDS, SURFACE ACTIVE AGENTS, EMULSIONS AND VESICLES

Номер: US20170000903A1
Принадлежит: UNIVERSITY OF SASKATCHEWAN

Crystalline cellulose gels useful in the stabilization of emulsions, including nanoemulsions, and for acting as cryptands or clathrates, and methods for their use and production are provided. In some embodiments, the emulsion is an oil-in-water emulsion. In some embodiments, such emulsions and/or vesicles produced in such emulsions, and/or the crystalline cellulose gel itself 15 are useful in the fields of drug delivery, pharmaceuticals, cosmetics, feed and food, paints and coatings, mining, or oil and gas recovery. 2. An emulsion as defined in claim 1 , comprising:between 45% and 98% v/v aqueous phase;between 1% and 50% v/v oily phase; andbetween 0.1% and 5% w/v crystalline cellulose gel.3. An emulsion as defined in claim 1 , wherein the oily phase comprises a plant-based oil claim 1 , wherein the plant-based oil optionally comprises flax oil claim 1 , hemp oil claim 1 , canola oil claim 1 , corn oil claim 1 , sunflower oil claim 1 , safflower oil claim 1 , soy oil claim 1 , coconut oil claim 1 , palm oil claim 1 , sesame oil claim 1 , or olive oil; and/or wherein the oily phase comprises an animal-based oil claim 1 , wherein the animal-based oil optionally comprises fish oil or milk fat; and/or wherein the oily phase comprises a combination of two or more of the foregoing oils.4. An emulsion as defined in claim 1 , wherein the crystalline cellulose gel is obtained from agricultural biomass or forestry by-products claim 1 , or from bacterial cellulose.5. An emulsion as defined in claim 4 , wherein the agricultural biomass or forestry by-products comprise wood claim 4 , cotton claim 4 , cereal straw claim 4 , grass straw claim 4 , flax straw claim 4 , or hemp straw; wherein the cereal straw optionally comprises wheat claim 4 , oat claim 4 , barley or rice straw; and wherein the flax straw or hemp straw optionally comprises shives (hurd) claim 4 , bast fiber claim 4 , or whole straw.6. (canceled)7. An emulsion as defined in claim 1 , comprising an active agent or ...

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05-01-2017 дата публикации

E-POLYLYSINE HYDROGEL AND PREPARATION METHOD AND APPLICATION THEREOF

Номер: US20170000924A1
Принадлежит: NANJING TECH UNIVERSITY

The present invention discloses a ε-polylysine hydrogel and the preparation method and application of the as-described ε-polylysine hydrogel. The polylysine hydrogel is non-toxic to a recipient, and has biodegradability and biocompatibility. The wound tissue healing material prepared by the present invention can be used in wound tissue adhesion in an efficient, stable, safe manner. 2. A process for preparing the ε-polylysine hydrogel as described in claim 1 , comprises the following steps:(1) adding a polyethylene glycol into dichlormethane, adding 4-dimethylaminopyridine and triethylamine reacting for 20-150 min at room temperature; then adding dropwisely the reaction mixture into a solution of p-nitrophenylchloroformate in dichlormethane under inert gas shielding condition at room temperature, reacting for 12 to 72 hours; evaporating and then adding dropwisely into a cold diethyl ether solution; removing precipitates from mixed solution by filtration and vacuum freeze-drying to obtain a p-nitrophenylchloroformate-polyethylene glycol-p-nitrophenylchloroformate copolymer;(2) dissolving the p-nitrophenylchloroformate-polyethylene glycol-p-nitrophenylchloroformate copolymer into a phosphate buffer; then adding a tyramine dissolved in the phosphate buffer, reacting for 5 to 72 hours at room temperature to obtain a solution of p-nitrophenylchloroformate-polyethylene glycol-tyramine copolymer;(3) dissolving a ε-polylysine into the phosphate buffer, then adding the p-nitrophenylchloroformate-polyethylene glycol-tyramine copolymer solution from step (2), and reacting at room temperature for 12 to 72 hours; removing the p-nitrophenylchloroformate precipitate by filtration, following by dialyzing the filtrate in purified water for 4 to 8 days; freeze-drying the filtrate to obtain a E-polylysine grafted with polyethylene glycol and tyramine;(4) dissolving the ε-polylysine-polyethylene glycol-tyramine from step (3) into the water or phosphate buffer; adding a mixed aqueous ...

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06-01-2022 дата публикации

CALIBRATION SLIDES FOR DIGITAL PATHOLOGY

Номер: US20220003639A1
Автор: Roessler Christian
Принадлежит:

In some embodiments, the present disclosure is directed to coatings or thin films comprising a dye or stain embedded within a matrix, e.g. a polymer matrix. 1. A calibration system comprising:(a) an optically transparent substrate;(b) a film having a substantially uniform thickness disposed on at least a portion of the optically transparent substrate, the film comprising a chromogenic precipitate embedded within a polymer, wherein the chromogenic precipitate is uniformly dispersed within the polymer.2. The calibration system of claim 1 , wherein the polymer is a hydrogel.3. The calibration system of claim 2 , wherein the hydrogel comprises crosslinked gelatin.4. The calibration system of claim 3 , wherein the crosslinked gelatin is derived from gelatin and an aldehyde.5. The calibration system of claim 2 , wherein the hydrogel is derived from a gelling agent and a crosslinking agent.6. The calibration system of claim 1 , wherein the polymer is an acrylate.7. The calibration system of claim 1 , wherein the chromogenic precipitate is a reaction product of a chromogen and an enzyme.8. The calibration system of claim 7 , wherein the chromogen is selected from the group consisting of 5-Bromo-4-Chloro-3-Indolyl Phosphate; 4-Chloro-2-methyl benzenediazonium; 3 claim 7 ,3′-Diaminobenzidine; 3 claim 7 ,3′ claim 7 ,5 claim 7 ,5;-tetramethylbenzidine; 4-chloro-1-naphthol; 2 claim 7 ,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid); o-phenylenediamine dihydrochloride; p-Nitrophenyl Phosphate; 5-Bromo-4-Chloro-3-indolyl-B-D-Galactopyranoside; and 2 claim 7 ,2 claim 7 ,5-5-tetra-p-nitrophenyl-3 claim 7 ,3 -(3 claim 7 ,3 -dimethoxy-4 claim 7 ,4-biphenylene)-di tetrazolium chloride.9. The calibration system of claim 8 , wherein the chromogen is 3 claim 8 ,3′-Diaminobenzidine.10. The calibration system of claim 8 , wherein the enzyme is selected from the group consisting of alkaline phosphatase claim 8 , horseradish peroxidase claim 8 , glycosylases claim 8 , and glucose ...

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03-01-2019 дата публикации

METHOD FOR PRODUCING WATER ABSORBENT RESIN

Номер: US20190001302A1
Принадлежит:

[Object] To provide a method for producing a water-absorbent resin in powder form or particle form, which has excellent physical properties such as water absorption performance and the like, at high productivity. 1. A method for producing a water-absorbent resin comprising:a polymerization step of polymerizing a monomer, which is a raw material of the water-absorbent resin, to obtain a hydrous gel crosslinked polymer dispersed in an organic solvent; anda separation step of separating the organic solvent and the hydrous gel crosslinked polymer from each other, whereinthe separation step includes transfer, compression, and discharge of the hydrous gel crosslinked polymer.2. The method according to claim 1 , wherein claim 1 , in the separation step claim 1 , the hydrous gel crosslinked polymer is squeezed while being transferred.3. The method according to claim 1 , wherein claim 1 , in the separation step claim 1 , the organic solvent is transferred in a direction opposite to a direction in which the hydrous gel crosslinked polymer is transferred.4. The method according to claim 1 , wherein the compression in the separation step is to apply a pressure of not less than 0.1 MPa to the hydrous gel crosslinked polymer.5. The method according to claim 1 , wherein claim 1 , in the separation step claim 1 , a screw extruder including a screw having a compression ratio of not less than 1.5 is used.6. The method according to claim 1 , wherein the hydrous gel crosslinked polymer discharged in the separation step has a residual liquid ratio of not greater than 10% by mass.7. The method according to claim 1 , wherein the organic solvent contains a surfactant and/or a polymeric dispersing agent.8. The method according to claim 1 , wherein the organic solvent separated in the separation step is reused in the polymerization step.9. A reaction device for polymerizing a monomer claim 1 , which is a raw material of a water-absorbent resin claim 1 , by reverse phase suspension ...

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05-01-2017 дата публикации

Methods for Purifying Polysaccharides and Pharmaceutical Compositions and Medical Devices Containing the Same

Номер: US20170002099A1
Принадлежит:

Methods for removing endotoxin from naturally occurring materials, such as polysaccharides (e.g., agarose and/or carrageenan) are described herein. Polysaccharides that are substantially free of endotoxins and uses thereof are also described. The polysaccharide materials can be isolated from microorganisms, multicellular organisms, such as, algae, plants, seaweed, etc. The method involves the use of acidic and basic solutions to hydrolyze the lipid-polysaccharide bond in endotoxins. Cleaving the fatty acid from the polysaccharide reduces the water-solubility of the fatty acid and enables its removal with an organic solvent such as ethanol. The polysaccharide component can also undergo acidic or basic hydrolysis due to the weak glycosidic bond between the sugar rings. 1. A method for isolating and purifying a naturally occurring agarose or derivative thereof produced from a biological source , the method comprising:(i) dispersing the agarose in one or more aliphatic alcohols to disrupt the bacterial wall to solubilize the lipid portion of endotoxins;(ii) removing the aliphatic alcohol to remove the lipid portion of the endotoxins and obtain the agarose or derivative thereof in solid form;(iii) dispersing the solid agarose or derivative thereof in a basic solution to hydrolyze lipid-inner core bonds of the endotoxins and solubilize the polysaccharide component of the endotoxins;(iv) washing the solution from step (iii) with an aliphatic alcohol to remove free lipids;(v) removing the basic solution in step (iii) to obtain the agarose or derivative thereof in solid form;(vi) dispersing the solid agarose or derivative thereof in an acidic solution to hydrolyze lipid-inner core bonds of the endotoxins not cleaved in step (iii);(vii) removing the acidic solution in step (vi) to obtain the agarose or derivative thereof in solid form;(viii) dispersing the solid agarose or derivative thereof from step (vii) in a second basic solution to further cleave lipid-inner core bonds ...

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07-01-2016 дата публикации

Electrospinning of ptfe with high viscosity materials

Номер: US20160002430A1
Принадлежит: Zeus Industrial Products Inc

An improved process for forming a PTFE mat is described. The process includes providing a dispersion with PTFE, a fiberizing polymer and a solvent wherein said dispersion has a viscosity of at least 50,000 cP. An apparatus is provided which comprises a charge source and a target a distance from the charge source. A voltage source is provided which creates a first charge at the charge source and an opposing charge at the target. The dispersion is electrostatically charged by contact with the charge source. The electrostatically charged dispersion is collected on the target to form a mat precursor which is heated to remove the solvent and the fiberizing polymer thereby forming the PTFE mat.

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03-01-2019 дата публикации

HYDROXYPHENYL NAPHTHOTRIAZOLES AS POLYMERIZABLE BLOCKERS OF HIGH ENERGY LIGHT

Номер: US20190002415A1
Принадлежит:

Described are high energy light blocking compounds and ophthalmic devices containing the compounds. In particular, described are hydroxyphenyl naphthotriazole structures with polymerizable functionality that block high energy light and are visibly transparent. The hydroxyphenyl naphthotriazole structures can be incorporated into ophthalmic devices, such as hydrogel contact lenses, to protect eyes from high energy light radiation. 2. The compound of wherein Ris at each occurrence is independently H claim 1 , chloro claim 1 , C-Calkyl claim 1 , phenyl claim 1 , or benzyl.3. The compound of wherein Rat each occurrence is independently H claim 1 , C-Calkyl claim 1 , phenyl claim 1 , benzyl claim 1 , or Rg-L.4. The compound of wherein Rg comprises styryl claim 1 , vinyl carbonate claim 1 , vinyl ether claim 1 , vinyl carbamate claim 1 , N-vinyl lactam claim 1 , N-vinylamide claim 1 , (meth)acrylate claim 1 , or (meth)acrylamide.5. The compound of wherein the linking group comprises C-Coxaalkylene claim 1 , C-Cthiaalkylene claim 1 , C-Calkylene-carboxylate-C-Calkylene claim 1 , C-Calkylene-amide-C-Calkylene claim 1 , or C-Calkylene-amine-C-Calkylene.6. The compound of that is selected from: 2-((3-(4-hydroxy-3-(2H-naphtho[2 claim 1 ,3-d][1 claim 1 ,2 claim 1 ,3]triazol-2-yl)phenyl)propanoyl)oxy)ethyl methacrylate claim 1 , and 2-(3-(4-hydroxy-3-(2H-naphtho[2 claim 1 ,3-d][1 claim 1 ,2 claim 1 ,3]triazol-2-yl)phenyl)propanamido)ethyl methacrylate.7. An ophthalmic device comprising a free radical reaction product of the compound of and one or more monomers suitable for making the ophthalmic device.8. The ophthalmic device of wherein the monomer suitable for making the ophthalmic device comprises a hydrophilic monomer claim 7 , a silicone-containing component claim 7 , or mixtures thereof.9. The ophthalmic device of that is a contact lens claim 7 , a corneal onlay claim 7 , a corneal inlay claim 7 , an intraocular lens claim 7 , or an overlay lens.10. A hydrogel formed from a ...

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03-01-2019 дата публикации

HYDROXYPHENYL PHENANTHROLINES AS POLYMERIZABLE BLOCKERS OF HIGH ENERGY LIGHT

Номер: US20190002459A1
Принадлежит:

Described are high energy light blocking compounds and ophthalmic devices containing the compounds. In particular, described are hydroxyphenyl phenanthroline structures with polymerizable functionality that block high energy light and are visibly transparent. The hydroxyphenyl phenanthroline structures can be incorporated into ophthalmic devices, such as hydrogel contact lenses, to protect eyes from high energy light radiation. 2. The compound of wherein Ris at each occurrence is independently H or halo.3. The compound of wherein one Ris H and remaining Rare independently H claim 1 , C-Calkyl claim 1 , or Rg-L.4. The compound of wherein Rg comprises styryl claim 1 , vinyl carbonate claim 1 , vinyl ether claim 1 , vinyl carbamate claim 1 , N-vinyl lactam claim 1 , N-vinylamide claim 1 , (meth)acrylate claim 1 , or (meth)acrylamide.5. The compound of wherein the linking group comprises C-Calkylene claim 1 , C-Coxaalkylene claim 1 , C-Cthiaalkylene claim 1 , C-Calkylene-carboxylate-C-Calkylene claim 1 , C-Calkylene-amide-C-Calkylene claim 1 , or C-Calkylene-amine-C-Calkylene.6. The compound of that is selected from: 2-(2-(3-(tert-butyl)-4-hydroxy-5-(1 claim 1 ,10-phenanthrolin-2-yl)phenyl)acetoxy)ethyl methacrylate; 2-(2-(4-hydroxy-3-(1 claim 1 ,10-phenanthrolin-2-yl)phenyl)acetoxy)ethyl methacrylate; 2-(2-(3-(tert-butyl)-4-hydroxy-5-(1 claim 1 ,10-phenanthrolin-2-yl)phenyl)acetamido)ethyl methacrylate; and 2-(2-(4-hydroxy-3-(1 claim 1 ,10-phenanthrolin-2-yl)phenyl)acetamido)ethyl methacrylate.7. An ophthalmic device comprising a free radical reaction product of the compound of and one or more monomers suitable for making the ophthalmic device.8. The ophthalmic device of wherein the monomer suitable for making the ophthalmic device comprises a hydrophilic monomer claim 7 , a silicone-containing component claim 7 , or mixtures thereof.9. The ophthalmic device of that is a contact lens claim 7 , a corneal onlay claim 7 , a corneal inlay claim 7 , an intraocular lens ...

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05-01-2017 дата публикации

ULTRA PURE RUBBER

Номер: US20170002121A1
Автор: Thompson David
Принадлежит:

The invention relates to an efficient process for the preparation and isolation of rubber particles formed in aqueous media and highly pure rubbers obtained thereby. The invention further relates to copolymer products comprising the same or derived therefrom. 182.-. (canceled)83. A process for the preparation of an aqueous slurry comprising a plurality of copolymer particles suspended therein , the process comprising:a) providing a reaction medium comprising an organic diluent, and at least two monomers whereby at least one monomer is an isoolefin and at least one monomer is a multiolefin;b) polymerizing the monomers within the reaction medium in the presence of an initiator system to form a medium comprising the copolymer, the organic diluent and optionally residual monomers;c) contacting the medium obtained in step b) with an aqueous medium comprising at least one LCST compound having a cloud point of 0 to 100° C. and removing at least partially the organic diluent and to the extent present in the medium removing at least partially the residual monomers to obtain the aqueous slurry comprising the copolymer particles selected from the group consisting of Ionic or non-Ionic surfactants, emulsifiers, and antiagglomerants or are in another embodiment', 'salts of (mono- or multivalent) metal ions or are in another embodiment', 'carboxylic acid salts of multivalent metal ions or are in another embodiment', 'stearates or palmitates of mono- or multivalent metal ions., 'whereby the aqueous medium contains 20,000 ppm or less of non-LCST compounds whereby the non-LCST compounds are'}84. The process according to claim 83 , wherein the aqueous medium comprises alternatively or additionally 500 ppm or less of the non-LCST compounds.85. The process according to claim 83 , wherein the aqueous medium comprises alternatively or additionally 550 ppm or less of salts of metal ions calculated on their metal content and with respect to the amount of copolymer present in the medium ...

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05-01-2017 дата публикации

Polymer Substrates Formed From Carboxy Functional Acrylamide

Номер: US20170002152A1
Принадлежит:

A polymer substrate, such as a polymer particle, is formed from a carboxyl functional monomer. In an example, the carboxyl functional monomer has a protection group in place of the OH of the carboxyl group. Once the monomer is polymerized, such a protection group can be removed, providing a polymer network with carboxyl functional sites. Such sites can be used to attach other functionality to the polymer substrate. 2. The method of claim 1 , wherein the hydrophilic particle is a hydrogel particle.3. The method of claim 1 , further comprising a hydrophilic monomer in the dispersed phase claim 1 , wherein the hydrophilic monomer includes an acrylamide monomer.4. The method of claim 1 , wherein the dispersed phase further includes a diacrylamide crosslinker having a hydrophobic protection group.5. The method of claim 1 , wherein converting the polymeric particle includes removing at least a portion of the plurality of the Rgroups from the polymeric particle.6. The method of claim 5 , wherein removing at least a portion of the plurality of the Rgroups includes acid cleaving at least a portion of the plurality of the Rgroups from the polymeric particle.7. The method of claim 1 , further comprising promoting a seed particle in the aqueous suspension to form the dispersed phase.8. The method of claim 7 , wherein the seed particle includes a seed polymer.9. The method of claim 8 , further comprising extracting the seed polymer after converting the polymeric particle.10. The method of claim 8 , wherein the seed polymer is hydrophobic.11. The method of claim 8 , wherein the seed polymer includes a styrenic polymer claim 8 , an acrylic polymer claim 8 , an acrylamide claim 8 , another vinyl polymer claim 8 , or a combination thereof.12. The method of claim 7 , wherein promoting the seed particle includes mixing a solvent and a promoting agent with the seed particle.13. The method of claim 12 , wherein the promoting agent includes dioctanoyl peroxide or dioctyladipate or ...

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02-01-2020 дата публикации

Composite and production method thereof

Номер: US20200002455A1

A composite including a plurality of block copolymer chains dispersed in a base polymer, the block copolymer chains including a polymer block (A) and a polymer block (B) having lower affinity for the base polymer than that of the polymer block (A), wherein each of the block copolymer chains has the polymer block (A) at two or more locations of the block copolymer chain, and in at least some of the block copolymer chains, the polymer blocks (A) are at least partially located in the base polymer and the polymer blocks (B) are at least partially exposed from the base polymer.

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04-01-2018 дата публикации

POLY(ETHYLENE GLYCOL) METHACRYLATE MICROGELS, PREPARATION METHOD AND USES

Номер: US20180002493A1
Принадлежит:

The invention relates to poly(oligo(ethylene glycol) methacrylate) microgels, to the process for preparing same and the uses thereof in various fields of application such as optics, electronics, pharmacy and cosmetics. 113-. (canceled)14. Microgels obtainable via precipitation polymerization of at least three monomers in an aqueous phase , in the presence of a crosslinking agent , said monomers being:{'sub': '2', 'di(ethylene glycol) methyl ether methacrylate (M(EO)MA),'}{'sub': 'n', 'an oligo(ethylene glycol) methyl ether methacrylate (M(EO)MA) n being an integer ranging from 3 to 12,'}{'sub': 1', '2', '3', '4', '1', '2', '3', '4, 'sup': −', '+', '+, 'a monomer of formula CRR═CRRin which R, R, Rand Rrepresent a hydrogen, a halogen or a hydrocarbon group, on condition that at least one of the four groups comprises a —COOH or —COOMgroup, Mrepresenting a cation.'}15. The microgels according to claim 14 , wherein M(EO)MA represents 50 mol % to 90 mol % of the total number of moles of the three monomers claim 14 , M(EO)MA represents 10 mol % to 50 mol % of the total number of moles of the three monomers and the monomer of formula CRR═CRRrepresents 0.1 mol % to 20 mol % of the total number of moles of the three monomers.16. The microgels according to claim 14 , wherein the monomer of formula CRR═CRRis methacrylic acid.17. The microgels according to claim 14 , wherein the crosslinking agent is an oligo(ethylene glycol) diacrylate (OEGDA) comprising from 1 to 10 ethylene glycol units.18. The microgels according to claim 14 , wherein said microgels comprise metal or metal oxide nanoparticles.19. The microgels according to claim 14 , wherein said microgels comprise magnetic nanoparticles.20. The microgels according to claim 14 , wherein said microgels comprise a compound selected in the group consisting of pigments claim 14 , dyes and sunscreens.21. A process for preparing hybrid microgels claim 14 , said process comprising the steps of:preparing a first aqueous colloidal ...

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04-01-2018 дата публикации

ELASTOMERIC COMPOSITIONS COMPRISING VINYL ACETAL POLYMERS

Номер: US20180002497A1
Принадлежит: EASTMAN CHEMICAL COMPANY

An elastomeric composition is provided comprising at least one vulcanizable unsaturated hydrocarbon elastomeric compound, at least one non-fibril, water insoluble vinyl acetal polymer, at least one filler, and optionally at least one coupling agent. A process of making the elastomeric composition is also provided as well as articles comprising the elastomeric composition. In particular, tires comprising the elastomeric composition are provided wherein the handling and processing characteristics are improved while other performance characteristics are retained. 1. A process for producing an elastomeric composition , said process comprising mixing at least one vulcanizable unsaturated hydrocarbon elastomer , at least one non-fibril , water insoluble vinyl acetal polymer , at least one filler , and optionally at least one coupling agent.2. The process according to wherein said elastomer is selected from the group consisting of natural rubber (NR) claim 1 , styrene-butadiene rubber (SBR) claim 1 , butadiene rubber (BR) claim 1 , nitrile rubber (NBR) claim 1 , 1 claim 1 ,4-cis polybutadiene claim 1 , polychloroprene claim 1 , 1 claim 1 ,4-cis polyisoprene claim 1 , halogenated or non-halogenated isoprene-isobutene copolymers claim 1 , butadiene-acrylonitrile claim 1 , styrene-butadiene-isoprene terpolymers and derivatives and mixtures thereof.4. The process according to wherein said non-fibril claim 3 , water insoluble vinyl acetal polymer has about 25 wt % to about 95 wt % of vinyl acetal monomer units claim 3 , from about 2 wt % to about 40 wt % vinyl alcohol monomer units claim 3 , and 0 wt % to 40 wt % vinyl acetate monomer units.5. The process according to wherein said non-fibril claim 1 , water insoluble vinyl acetal polymer is polyvinyl formal and wherein said polyvinyl formal has about 25 wt % to about 95 wt % of vinyl acetal monomer units claim 1 , from about 2 wt % to about 40 wt % vinyl alcohol monomer units claim 1 , and 0 wt % to 40 wt % vinyl acetate ...

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07-01-2021 дата публикации

CROSSLINKED POLYVINYL MATRIX FOR WATER TREATMENT

Номер: US20210002395A1
Принадлежит: Imam Abdulrahman Bin Faisal University

Cross-linked polyvinyl polymers comprising charged groups and methods of making are disclosed. The polymers are effective and durable adsorbent of dyes from aqueous solutions. Also, a method of removal of dyes from contaminated water is disclosed. 2. The cross linked polyvinyl polymer of claim 1 , wherein the vinyl compound of formula I is at least one selected from the group consisting of vinylphosphonic acid (VPA) claim 1 , and vinylsulfonic acid.3. The cross linked polyvinyl polymer of claim 1 , wherein the vinyl compound of formula I is VPA.4. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is at least one selected from the group consisting of bis[2-(methyacryloyloxy)ethyl] phosphate (BMEP) and bis[2-(methyacryloyloxy)ethyl] sulfate.5. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is BMEP.6. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is present in the crosslinked polyvinyl polymer in an amount in the range of 10 mole % to 50 mole % based on the total molar amount of the vinyl compound of formula I and the cross-linking compound of formula II.7. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is present in the crosslinked polyvinyl polymer in an amount of about 40 mol. % based on the total molar amount of the vinyl compound of formula I and the cross-linking compound of formula II.8. The cross linked polyvinyl polymer of claim 1 , wherein the vinyl compound of formula I is VPA and the cross linking compound of formula II is BMEP.9. The cross linked polyvinyl polymer of claim 8 , wherein the cross linking compound of BMEP is present in the crosslinked polyvinyl polymer in an amount in the range of 10 mole % to 50 mol. % of the total molar amount of VPA and BMEP.10. The cross linked polyvinyl polymer of claim 8 , wherein the cross linking compound of BMEP is present ...

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04-01-2018 дата публикации

COMPOSITION COMPRISING A MULTISTAGE POLYMER, ITS METHOD OF PREPARATION AND ITS USE

Номер: US20180002520A1
Принадлежит:

The present invention relates to a polymer composition comprising a (meth)acrylic polymer and a multistage polymer. In particular the present invention it relates to polymer composition comprising a (meth)acrylic polymer and a multistage polymer that can be used as a masterbatch. More particularly the present invention relates also to a process for preparing a polymer composition comprising a (meth)acrylic polymer and a multistage polymer by spray drying or coagulation. 2. The polymer composition according to claim 1 , wherein (meth) acrylic polymer (P1) has a mass average molecular weight Mw of less than 100 000 g/mol.3. The polymer composition according to claim 1 , wherein (meth) acrylic polymer (P1) has a mass average molecular weight Mw of less than 60 000 g/mol.4. The polymer composition according to claim 1 , wherein (meth) acrylic polymer (P1) has a mass average molecular weight Mw between 5000 g/mol and 60 000 g/mol.5. The polymer composition according to wherein the composition comprises at least 30% of multistage polymer.6. The polymer composition according to wherein the multi stage polymer comprisesa) one stage (A) comprising a polymer (A1) having a glass transition temperature of less than 10° C.b), one stage (B) comprising a polymer (B1) having a glass transition temperature of at least 30° C.7. The polymer composition according to claim 6 , wherein stage (A) is the first stage and wherein stage (B) comprising polymer (B1) is grafted on stage (A) comprising polymer (A1).8. The polymer composition according to wherein polymers (A1) and (B1) are acrylic or methacrylic polymers.9. The polymer composition according to wherein polymer (A1) comprises at least 50 wt % of polymeric units coming from isoprene or butadiene.10. The polymer composition according to wherein polymer (A1) is a silicone rubber based polymer.11. The polymer composition according to wherein (meth) acrylic polymer (P1) comprises (meth)acrylic monomers that make up 50 wt % or more of the ...

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04-01-2018 дата публикации

Acid-containing polymers as coalescing agents for latexes

Номер: US20180002563A1
Автор: James W. Taylor
Принадлежит: BASF SE

Provided herein are aqueous dispersions. The aqueous dispersions can comprise a first copolymer derived from one or more ethylenically unsaturated monomers, and a second carboxy-functional copolymer derived from one or more carboxylic acid-containing monomers. The aqueous dispersions can be used to prepare low- or zero-VOC aqueous coating compositions that possess desirable properties, including good block resistance and scrub resistance. Coatings and coating formulations comprising the aqueous dispersion, as well as methods of making and using the same are also provided.

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07-01-2021 дата публикации

BIOCOMPATIBLE HYDROGEL CAPSULES AND PROCESS FOR PREPARING SAME

Номер: US20210002433A1
Принадлежит:

Described herein are compositions and methods for preparing hydrogel capsules using a cross-linking solution comprising a process additive. The process additive improves the quality of the resulting hydrogel capsules, such as increasing the number of defect-free capsules. 117-. (canceled)18. A process for preparing a hydrogel capsule composition from a polymer solution which comprises at least one afibrotic hydrogel-forming polymer and optionally an unmodified hydrogel-forming polymer , the process comprising contacting a plurality of droplets of the polymer solution with an aqueous cross-linking solution for a period of time sufficient to produce hydrogel capsules , wherein the cross-linking solution comprises a cross-linking agent , a buffer , an osmolarity-adjusting agent and a process additive , wherein the process additive is an amphiphilic compound.19. The process of claim 18 , wherein the polymer solution further comprises a cell suspension comprising a plurality of cells.20. The process of claim 19 , wherein the process additive reduces the surface tension of the cross-linking solution by about 1% claim 19 , about 2% claim 19 , about 5% claim 19 , about 10% claim 19 , about 15% claim 19 , about 20% claim 19 , about 25% claim 19 , about 30% claim 19 , about 35% claim 19 , about 40% claim 19 , about 45% claim 19 , about 50% claim 19 , or more.21. The process of claim 19 , wherein at least 95% of the hydrogel capsules in the hydrogel capsule composition are spherical capsules.22. The process of claim 19 , wherein the process additive is a surfactant or a non-ionic surfactant claim 19 , and the process additive is present in the cross-linking solution at a concentration of 0.001% to about 0.1% claim 19 , about 0.005% to about 0.05% claim 19 , about 0.005% to about 0.01% claim 19 , or about 0.01% to about 0.05%.23. The process of claim 22 , wherein the process additive is a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock ...

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