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7214724 |
Method for cross-linking a foamable plastic
A plastic is converted from an initial condition with a higher density into a foamed condition with a lower density using a blowing agent, wherein the plastic is cross-linked prior to foaming by...
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6426127 |
Electron beam modification of perhydrosilazane spin-on glass
The invention pertains to dielectric films for the production of microelectronic devices. A spin-on glass film is produced by depositing a silazane polymer containing composition film onto a...
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6410610 |
Method for producing cationic polyelectrolytes
A process for producing water-soluble, cationic polyelectrolytes is described, wherein the polymerization of the water-soluble monomers is initiated at low temperatures using a combination of UV...
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6258910 |
Polymerizing vinyl chloride in carbon dioxide
Disclosed is a method of polymerizing vinyl chloride or vinylidene chloride monomer. A mixture is prepared of (1) a monomer selected from the group consisting of vinyl chloride, vinylidene...
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6204301 |
Fluoroplastic composites and a process for producing the same
Fibers as a reinforcing substrate are impregnated with the particles of polytetrafluoroethylene and pressed into a shape at the melting point of polytetrafluoroethylene. Alternatively, the...
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5985949 |
Product having reduced friction and improved abrasion resistance
A product having reduced friction and improved abrasion resistance comprises a formed resin containing at least one fluorine-containing polymer which is exposed to an ionizing radiation. The formed...
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5872157 |
Method for olefin oxidation
A process for making oxidized olefins is disclosed. Specifically, the process comprises providing an olefin and oxygen in combination in a reaction medium comprising carbon dioxide, and then...
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5753783 |
Process for haloalkylation of high performance polymers
Disclosed is a process which comprises reacting a polymer of the general formula ##STR1## wherein x is an integer of 0 or 1, A is one of several specified groups, such as ##STR2## B is one of...
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5719260 |
Thermoset resin
A process is provided comprising crosslinking of a derivative of a linear alternating copolymer of carbon monoxide and one or more olefinically unsaturated compounds, which copolymer has a ratio of...
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5688838 |
Process for preparing hydrogen-containing fluoropolymers by suspension (co)polymerization
Process for preparing hydrogen-containing fluoropolymers, wherein the corresponding olefinic monomers are (co) polymerized in an organic suspending medium in the presence of a radical...
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5444103 |
Modified polytetrafluoroethylene and process for its production by irradiation
Modified PTFE is produced by exposing a starting PTFE to an ionizing radiation for a total dose of at least 100 kGy in the absence of oxygen at a temperature not lower than the crystal melting...
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5106876 |
Water-insoluble hydrogel and method for production thereof by using radiation, freezing and thawing
A water-isoluble hydrogel, obtained by cross-linking a polyvinyl alcohol by itself, a polyvinyl pyrrolidone by itself, and a polyvinyl alcohol and a polyvinyl pyrrolidone as a pair by exposure to...
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5084203 |
Light transmissive liquid crystalline composite exhibiting a high Kerr effect
In one embodiment this invention provides an optical medium which consists of a microdispersion of liquid crystal droplets in a synthetic resin matrix. A preferred invention optical medium exhibits...
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5034428 |
Immobilized biomolecules and method of making same
A method of biomolecule immobilization is described in which the biomolecule itself or, alternatively, a monomer-conjugated biomolecule, is grafted with free monomer onto a hydrophilic,...
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4981625 |
Monodisperse, polymeric microspheres produced by irradiation of slowly thawing frozen drops
Monodisperse, polymeric microspheres are formed by injecting uniformly shaped droplets of radiation polymerizable monomers, preferably a biocompatible monomer, having covalent binding sites such as...
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4904708 |
Method of manufacturing soft contact lens material
Hydrophilic monomers in a supercooled, transparent state, are polymerized in the presence of water. The polymers have low levels of residual monomers and exhibit good mechanical strength. The...
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4839109 |
Process for producing a contact lens
A mixture of a specified siloxanylalkyl ester monomer and a specified vinyl monomer is polymerized by exposure to an ionizing radiation at low temperatures and the resulting polymer is worked with...
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4713290 |
High strength and modulus polyvinyl alcohol fibers and method of their preparation
Polyvinyl alcohol of molecular weight over 500,000 (i.e. 1,500,000 to 2,500,000) is spun as a dilute solution (2-15%) in a relatively non-volatile solvent such as glycerin. The resultant gel fiber...
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4598128 |
Polymer composition and preparation method
An ethylene polymer composition is provided, the composition being a blend of a first ethylene polymer and a second ethylene polymer, the second ethylene polymer characterized by molecules having...
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4586995 |
Polymer and irradiation treatment method
A novel polymer and polymer treatment method are provided. The method involves irradiation of a polymer under non-gelling conditions at a temperature above the polymer melting temperature and in...
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4486280 |
Self-curing modified epoxy resin composition and aqueous dispersion thereof
A self-curing epoxy resin composition is, herein, disclosed produced by irradiating with an electron beam a mixture of 85 to 97 wt % of an epoxy resin and 3 to 15 wt % of a quaternary alkyl...
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4463138 |
High molecular weight poly(vinyl acetate) and poly(vinyl alcohol) and processes for their production
An improved poly(vinyl acetate) which on hydrolysis and reacetylation has an intrinsic viscosity of at least about 5 dL/g and an improved poly(vinyl alcohol) which on acetylation yields poly(vinyl...
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4459387 |
Chlorination of poly(vinyl chloride) in liquid chlorine, and chlorinated poly(vinyl chloride) composition
A process is disclosed for photochlorinating poly(vinyl chloride), ("PVC"), suspended in liquid chlorine ("Cl 2 ") which swells the PVC and permits chlorination to occur in a gel phase. PVC...
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4379038 |
Process for preparing a physiologically active substance controlled release composite composition
A physiologically active substance controlled release composite composition is prepared by a process which comprises the steps of: adding a physiologically active substance to a physiologically...
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4377459 |
Process for chlorination of poly(vinyl chloride) with liquid chlorine, and chlorinated poly(vinyl chloride) composition
A process is disclosed for the preparation of chlorinated poly(vinyl chloride), (hereinafter "CPVC" for brevity), in the form of free-flowing macrogranules which are derived from solid free-flowing...
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4332657 |
Emulsion composition for use in baking paint
An emulsion composition for use in baking paint prepared by emulsion polymerization with ionizing radiation of a monomer mixture comprising (1) at least one acrylamide selected from the group...
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4175017 |
Sulfur vulcanizable interpolymers
Sulfur vulcanizable elastomers comprise interpolymers of a major proportion of (a) one or more olefinic or haloolefinic hydrocarbons; (b) one or more esters of acrylic acid in which the acyclic or...
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4144155 |
Radiation process for producing a reactive aqueous emulsion
A process for producing a reactive aqueous emulsion comprising dispersing a monomer mixture of (a) 65.0 - 98.8% by weight of radical polymerizable hydrophobic ethylenic unsaturated monomer having...
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4138538 |
Process for producing a transparent shaped polymeric product
This invention provides a process for preparing a transparent polymeric product free from strain and bubbles and having improved physical and chemical properties. The product can be produced from a...
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4121986 |
Process for the polymerization of polyallylamines in the presence of a mineral acid solution
A process of polymerizing a monomer mixture containing from 3 to 100% of amines containing two or more allyl groups which method comprises reacting a solution of the monomer mixture in a...
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4069125 |
Method for controlled radiation polymerization of olefinic monomors
Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a mono-olefinic monomer such as isobutylene and the copolymerization thereof...
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4066522 |
Process for the production of high molecular weight acrylamide polymers
High molecular weight water-soluble acrylamide polymers can be produced in good yield by irradiating a solution comprising acetone, water and acrylamide with an ionizing radiation in the presence...
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4052281 |
Method for production of sulfhydryl compounds
An improved process is disclosed for production of sulfhydryl-terminated compounds by reaction of an allene and hydrogen sulfide initiated with ultraviolet light of wavelength above about 2600...
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4052283 |
Sensitized production of sulfhydryl compounds using ultraviolet radiation
An improved process for production of sulfhydryl-terminated compounds by reaction of an allene compound and hydrogen sulfide is disclosed wherein the reaction is carried out in the presence of...
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4049518 |
Multi-step radiation process of producing polyoxymethylenes
A multi-step process of producing polyoxymethylenes by solid state polymerization of trioxane is disclosed. Trioxane is irradiated with ionizing radiation within a temperature range in which no...
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4025403 |
Method of radiation polymerization and copolymerization of isobutylene by a cationic mechanism
Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a mono-olefinic monomer such as isobutylene and the copolymerization thereof...
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4025391 |
Preparation of bead-shaped immobilized enzyme
Bead-shaped immobilized enzymes are obtained by adding a solution containing an enzyme and at least one water-soluble monomer or polymer to a water insoluble or slightly soluble fluid to form a...
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4010088 |
Process for preparing highly-cured transparent resin molded products
A process for the production of molded product composed of transparent resin having highly cured cross-linked structure comprises the following three steps: 1. the step incorporating a...
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4004996 |
Fluorination of organic compounds
Organic amines, amino acids, polyamides and vinylpolymers are fluorinated by the action of fluorine in liquid hydrogen fluoride optionally containing boron trifluoride or antimony pentafluoride at...
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3998713 |
Process for controlled radiation polymerization and copolymerization of monoolefinic and diolefinic monomers using metallic catalysts
The invention is for a process for the controlled polymerization and copolymerization of monoolefinic and diolefinic monomers, which are able to polymerize by a cationic mechanism and particularly...
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3997417 |
Process for radiation polymerization and copolymerization of monomers with olefinic double bonds using metal halide catalysts
Process for polymerization and copolymerization of momo-olefinic monomers, such as isobutylene, either with one another or with dienes, catalyzed by tetravalent metal halides, and initiated or...
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3990958 |
Radiation polymerization of triallylamines using a non-polar, non-hydroxylic solvent
A method of polymerizing a composition comprising a mixture of monomers said monomer mixture containing from 3 to 100% of amines containing two or more allyl groups which method comprises...
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3962038 |
Preparation of water-insoluble enzymes
Water-insoluble enzymes are prepared by mixing an enzyme with at least one water soluble monomer selected from the group consisting of acrylamide, bisacrylamide, acrylic acid, sodium acrylate,...
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3912693 |
Process for producing polyamines
Polymers or copolymers of diallylamine derivatives of the formula, ##EQU1## wherein R 1 is hydrogen or methyl: R 2 and R 3 are independently hydrogen, allyl, methallyl, straight-chain or...
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3900380 |
Preparation of fluorinated cyclobutenyl alkyl ether copolymers
Disclosed are highly fluorinated polymers of the formula: ##EQU1## In the above formula, R f and R f ' are straight or branched chain perfluoroalkyl groups or perfluoroalkyl ethers having a...
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3897322 |
Radiation polymerization of olefinic monomers in the presence of metal containing catalysts
Method for the cationic polymerization of at least one olefinic monomer and more particularly the homopolymerization of a mono-olefinic monomer such as isobutylene and the copolymerization thereof...
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3896084 |
Copolymers of acetone with unsaturated compounds of aliphatic series and a method for preparing same
The invention relates to copolymers of acetone with acrylic acid or its derivatives, and also to the method for preparing them. The method consists in that a mixture of acetone and acrylic acid or...
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3876446 |
Manufacture of poromeric materials
Poromeric web materials are continuously manufactured by applying to a thin layer of ice crystals a textile fibrous structure and an aqueous solution or dispersion of A. polyethylenically...
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3870620 |
Photopolymerization process for the manufacture of copolymer of butadiene and acrylonitrile
An alternating copolymer of butadiene and acrylonitrile is effectively manufactured without using expensive catalysts which are often dangerous and difficult to be completely removed so as to...
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3867270 |
UV curing of conjugated diene-containing butyl rubber
Conjugated diene-containing butyl rubber is cured with ultra violet radiation, with the aid of certain photosensitizers. Provides for new class of sealants and mastic compounds based on butyl rubber.
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