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5342855 Stable dispersions of polyhydrazodicarbonamides useful in the preparation of polyurethane products having improved load-bearing capacity  
This invention relates to a process for the preparation of stable dispersions of hydroxyl-containing polyhydrazodicarbonamides in a hydroxyl-containing compound. The dispersions are prepared by...
5338765 Method of and apparatus for continuously foaming a polyimide powder  
A method of and apparatus for continuously foaming a polyimide prepolymer powder which is not susceptible to heating by microwave energy utilize a preheated conveyor belt to heat the powder in...
5308877 Resins with high surface areas and porosities  
Organic resins with high surface areas and porosities, which are insoluble in organic solvents and contain few or no flexible groups in the resin structure, are disclosed. Also disclosed is a...
5282101 Disc drive gasket and method of forming same  
A gasket for a disc drive system having a recording media within a sealed housing having top and bottom casing members, a read/write head for transferring information between the recording media...
5277943 Thermal bleaching process for non-contaminating fluorocarbon fiber media  
A process for reducing the level of extractables, whitening, and rendering a porous material non-contaminating where the porous material is comprised of bonded fluorocarbon fibers and a...
5262444 Porous plastic film product, useful as a breathable wall covering or filters  
The invention relates to a breathable, plastic film, useful as a wall covering material. A low boiling additive, such as water, is added to a plastisol before extrusion. During extrusion and...
5230832 Galactomannan-agarose binary gel for nucleic acid electrophoresis  
A method for forming an agarose electrophoretic gel by addition of gamma-irradiated clarified galactomannan (γCGM) to optically clarify the gel and improve the electrophoretic fractionation and...
RE34296 Process for the preparation of hydrophilic membranes and such membranes  
This invention relates to a process for the preparation of hydrophilic membranes by coagulation of a solution of at least one hydrophobic polymer and at least one hydrophilic polymer in a suitable...
5173517 Rigid polyurethane foam and heat insulator obtained therefrom  
A rigid polyurethane foam obtained by foaming a special polyol component and an isocyanate component using only water as a blowing agent has balanced excellent properties including a remarkably...
5166182 Thermosetting plastic foams and methods of production thereof using novel blowing agents  
Blowing agents and blowing agent mixtures for preparing a cellular thermosetting plastic foam comprise either (1) a non-chlorinated, partially hydrogenated fluorocarbon with the general formula Hx...
5158721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface  
A porous membrane is formed from an interpenetrating polymer network of a hydrophobic polymer and a polymerized and crosslinked hydrophilic monomeric composition. A solution of the polymer and...
5154853 Unimolecular micelles and method of making the same  
In accordance with the present invention there is provided a method of making a cascade polymer including the steps of alkylating the branches of a multi-branch core alkyne building block...
5128379 Process for rapid cooling of polyurethane foam  
An improved process for rapidly cooling hot freshly polymerized foam is provided by passage of a fluid coolant stream having a water vapor content which initially is in the range from slightly...
5124363 Aqueous air foams of polyhydroxy polymer  
A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble...
5122273 Hydrophilic membrane, process for producing a hydrophilic membrane  
A membrane for membrane filtration is disclosed, comprising a polymer matrix formed by coagulation with a liquid coagulant from a casting syrup, which polymer matrix is linked to hydrophilic...
5112874 Molded polyurethane plastics, a process for their production and their use as shoe soles  
The present invention is directed to optionally cellular, molded polyurethane plastics having a solid surface and characterized by a content of about 0.1 to 8.0% by weight, based on the weight of...
5110842 Electron-beam cured sheet-type foam  
An electron-beam cured sheet-type foam comprises: a polypropylene type resin (A) of 100 parts by weight of which main component is polypropylene; a copolymer resin (B) of 5 to 40 parts by weight...
5110833 Preparation of synthetic enzymes and synthetic antibodies and use of the thus prepared enzymes and antibodies  
A method of preparing synthetic enzymes and synthetic antibodies in which method use is made of the so called molecular imprinting method, is described. As imprinting molecules use is made of...
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...
5096932 Polyimide foam products and methods  
Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH,...
5076925 Process for preparing a microporous membrane and such a membrane  
The invention relates to a process for preparing a microporous membrane, starting from a mixture of at least a hydrophobic polymer and a hydrophilic polymer, by dissolving these polymers first in...
5071809 Tertiary amine catalysts for polyurethanes  
The invention pertains to tertiary amines used as catalysts for the preparation of polyurethane foams prepared via the catalytic reaction of a polyisocyanate with a polyol in the presence of...
5064867 Production of foamed polymer structures  
Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such...
5057252 Method of producing heat-resistant and shape memory formed products  
A method of forming a heat-resistant product, produced from a polymer composition comprising 40-70 weight % of a thermoplastic elastomer containing a repeating unit derived from ethylene and a...
5026735 Treatment of hazardous materials with aqueous air foam of polyhydroxy polymer  
A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble...
5019295 Foamable silicone rubber composition  
A foamable silicone rubber composition comprising: (A) a particular diorganopolysiloxane, (B) a powdery silica filler, (C) a particular conductive metallic oxide powder, (D) a foaming agent, and...
4973608 Process and apparatus for charging a liquid reactant with gas  
The present invention is directed to a novel process and apparatus for charging a liquid reactant with a gas. In the process, the liquid reactant which is as yet uncharged with gas is introduced...
4968733 Process for producing microporous powders and membranes  
A process produces microporous powders or shaped articles, in particular membranes in the form of flat films, tubular films or hollow fibers, which may be used for controlled release of an active...
4948815 Process for charging at least one component with gas in the preparation of cellular plastics  
The present invention is directed to a process for charging a component with a gas. The gas is metered through a hollow stirrer into the component to be charged with gas. The stirrer is operated...
4944902 Polyimide compositions and processes  
A copolyimide foam comprising the reaction product of one or more of an aromatic tetracarboxylic acid and a compound of the formula: ##STR1## where x is an integer from 1 to 12 and R1, R2, R3 and...
4902721 Foamable thermoplastic polymers and a method for foaming  
Foamed products are prepared by subjecting a crosslinked polymer such as an ethylene-carbon monoxide copolymer susceptible to heating by high frequency electromagnetic radiation such as microwave...
4863647 Process for preparation of electrophoresis gel material  
Describes a process for controlling the polymerization and cross-linked density of electrophoretic gel products useful for separation of bioorganic molecules, which process utilizes...
4855327 Process for producing pre-expanded particles of polyolefin resins  
A process for producing pre-expanded particles of a thermoplastic resin, wherein said particles are polyolefin resin particles which are obtained by polymerizing an olefin in the presence of a...
4840756 Radiation process for preparation of electrophoresis gel material  
Describes a process for controlling the polymerization and cross-linked density of electrophoretic gel products useful for separation of bioorganic molecules, which process does not use initiators...
4808637 Superabsorbent composition and process  
The present invention provides an acrylate superabsorbent composition having an improved rate of absorbency, low residual acid content, and a low acrylate monomer content. Acrylic acid, an alkali...
4791142 Method and apparatus for producing a foam from a molten thermoplastic material  
A method and apparatus for creating molten thermoplastic material foam by separately pressurizing the molten thermoplastic material and a gas and by delivering that material and gas sequentially...
4777186 Restricted expansion foaming and the flexible polyurethane foam thereby produced  
Polyurethane foams having improved physical properties are produced by placing a polymerizable polyurethane reaction mixture into a pressurizable chamber, then polymerizing the reaction mixture at...
4771078 Method of producing a foam from a radiation-curable composition  
This invention relates to a process of producing a cured foamed polymer by mechanically frothing a radiation-curable composition and curing the frothed composition with radiation and using such...
4766159 Process for producing polypropylene foam  
The invention relates to the process of the invention provides a radiation-crosslinked polypropylene foam by extrusion at a low temperature (about 170° C.) below the decomposition point of the...
4764536 Process and apparatus for the preparation of a free-flowing mixture made of free-flowing components which reacts to form foam  
The present invention is directed to a process and apparatus for introducing gas into one of at least two free-flowing components which are subsequently mixed to provide a foam-forming...
4746706 Polyolefin particles and process for preparing the same  
Polyolefin particles having a halogenated surface region, which are prepared by irradiating ultraviolet rays to an aqueous dispersion of polyolefin particles in the presence of a halogen gas. The...
4740577 Energy polymerizable polyurethane precursors  
A polymerizable composition of polyurethane precursors is rapidly cured using energy-activated catalysts to provide polyurethanes. The polymerizable composition is comprised of polyisocyanates...
4704198 Porosity gradient electrophoresis gel  
Describes a process for controlling the polymerization and cross-linked density of electrophoretic gel products useful for separation of bioorganic molecules, which process does not use initiators...
4701472 Expandable polyvinyl chloride resin composition and foamed sheet prepared from the same  
A crosslinked polyvinyl chloride resin composition comprising: A: a polyvinyl chloride resin, B: at least one copolymer selected from the group consisting of ethylene/acrylic acid copolymers,...
4681716 Process for the preparation of polybenzimidazole foams  
The present invention is a process for the preparation of polybenzimidazole foams. Polybenzimidazoles containing 10 to 30 percent by weight residual solvent can be heated at a temperature of about...
4594362 Friable foam textile cleaning stick  
A dry-type textile cleaning article is disclosed which comprises a friable hydrophilic polyurethane foam body which incorporates abrasive particles, solvents, surfactants, and adjuvants such as...
4590218 Method and apparatus for forming a chemical composition from cross-linking components and product of the method  
A method and apparatus for forming a chemical composition from two liquid components selected for cross-linking reaction with each other and a product of the method are disclosed, the method...
4585605 Rigid thermoplastic resin foam and process for preparation thereof  
The foam of the present invention, which has a multi-cellular structure including many wrinkles having one end in the boundary portion where at least three cells are adjacent to one another and...
4525297 Electro-conductive thermoplastic resin foam and preparation process thereof  
An electro-conductive foam is prepared by mixing together 100 parts by weight of a resin component consisting of 10 to 90 parts by weight of a crystalline thermoplastic polyolefin type resin and...
4510031 Heat-foamable olefinic resin composition and process for production of olefinic resin foam from said composition  
A heat-foamable olefinic resin composition comprising (a) an ethylenic polymer, (b) a propylene/alpha-olefin copolymer having a melting point of 130° to 160° C., (c) a propylene polymer having a...