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5451454 |
High-molecular materials and processes for manufacturing the same
A blend of high-molecular and a low-molecular organic material contains the high-molecular organic material in a proportion smaller than that of the low-molecular organic material, and has a...
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5444097 |
Porous polymeric structures and a method of making such structures by means of heat-induced phase separation
Porous polymeric structures are provided along with a method to make such structures comprising heat-induced phase separation of a polymeric solution exhibiting a lower critical solution temperature.
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5362761 |
Process for fabricating porous silicone product
A process of fabricating a porous silicone product utilizing a silicone emulsion capable of forming an elastomer by removal of water therefrom. The silicone emulsion comprises a water emulsion of...
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5360827 |
Process for preparation of latex of hollow polymer
A process for preparation of latex of a hollow polymer which comprises adding a base, in the presence of a monomer, to latex containing carboxy-modified copolymer particles to make the pH of the...
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5360828 |
Biofoam II
Biofoam is a rigid, microcellular organic foam made from organic materials derived from natural products and biological organisms. Starting materials include agar, agarose, gelatin, algin,...
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5358822 |
Method of making a liquid toner for electrophotographic imaging
A method of making liquid toner for electrophotographic imaging by forming a mixture of a polyamide polymer, a good solvent therefor and a particulate pigment, heating the polymer/pigment/solvent...
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5358990 |
Aqueous film-forming compositions for controlling the release of active agents
Aqueous coating compositions for forming elastomeric films around active cores (e.g., drugs) comprising a dispersion of pre-crosslinked polyorganosiloxane latex particles, colloidal silica...
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5352711 |
Method for hydrophilizing absorbent foam materials
Normally hydrophobic foams, such as polyurethane foams and polymerized water-in-oil emulsion foams, are rendered hydrophilic by means of treatment with simple surfactants and hydrophilizing agent...
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5306734 |
Use of viscosity as an in-line diagnostic for high internal phase emulsion generation
A lightweight absorbent foam is produced using a high internal phase emulsion (HIPE), the production of which incorporates the use of capillary viscosity measurements as an in-line diagnostic for...
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5306761 |
Hygroscopic polyamide fiber
A polyamide fiber comprised of (A) a thermoplastic aliphatic polyamide having copolymerized therein a polyalkylene oxide unit and having a melting point of at least 160° C., and (B) a...
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5298615 |
Ultra-lightweight, open-pore foamed cellulose materials with large surface areas, having ion-exchangeable functional groups introduced therein
An ultra-lightweight, open-pore foamed cellulose material with an increased surface area, having ion exchangeable functional groups introduced in it. The cellulose material presents a...
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5288763 |
Porous, polymer beads and process of their preparation
Porous, polymer particles comprising a functionalized cross-linked copolymer having microporous regions and macroporous regions in the polymer matrix thereof, wherein the functional groups are...
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5270445 |
Method of forming fine polymer particles and polymer-encapsulated particulates
A polyamide polymer and one of methanol, ethanol and 2-propanol are formed into a solution by heating at 70 degrees Celsius for approximately two hours, the resulting solution is cooled to...
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5264553 |
Method of forming uniform polymer spheres, composite particles and polymer encapsulated particles
A method for forming fine polymer particles, including core/shell polymer composite particles and polymer-encapsulated liposome particles. A polymer solution is formed using a selective solvent...
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5264166 |
Polyimide membrane for separation of solvents from lube oil
An improved asymmetric membrane fashioned from a polyimide for the liquid separation of solvents from lube oil. The membrane is based on a fully imidized polymer based on...
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5252621 |
Supports for active entities
A polymeric bead has now been developed to act as a support for other entities having a volume mean diameter of up to 250 microns and having a surface provided with pores which form at least 10% by...
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5250576 |
Process for preparing emulsions that are polymerizable to absorbent foam materials
Disclosed is a process for the continuous preparation of high internal phase emulsions which are suitable for subsequent polymerization into polymeric foam materials that, upon dewatering, act as...
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5238973 |
Process for the preparation of polyurea elastomers containing urethane groups
A process for the preparation of optionally cellular elastic moldings by the reaction injection molding technique in closed molds, in which isocyanate prepolymers A) based on a) polyisocyanates...
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5225536 |
Particles of gelatin and amino acid to be blended in resins
Fine particles of gelatin and amino acid used in the present invention are particularly suitable for use in combination with resins. Gelatin particles used in the present invention have the...
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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...
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5168104 |
Macroporous particles as biocompatible chromatographic supports
A method to prepare uniform populations of macroscopic beads containing pores of at least 0.1 microns diameter is described. The beads consist essentially of a copolymer of a monoethylenically...
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5155144 |
Polysaccharide-based porous sheets
A microporous sheet comprising a polymeric matrix having a liquid insoluble, particulate, activated polysaccharide media dispersed therein; use of the sheet in affinity chromatography or...
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5130342 |
Particle-filled microporous materials
A microporous particulate-filled thermoplastic polymeric article is provided. The article can be in the form of a film, a fiber, or a tube. The article has a thermoplastic polymeric structure...
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5102917 |
Porous polysulfone media suitable for filtration
A porous polysulfone membrane and process for the preparation of porous polysulfone media suitable for use in filtration comprises blending polysulfone with a particulate solid or with said...
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5081161 |
Process for making shaped articles of a thermoplastic resin having a microcellular structure
A process for producing an article of a synthetic resin material or a thermoplastic resin blend having a microcellular structure comprises dispersing in a solid thermoplastic resin matrix having...
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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 a...
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5071645 |
Process of producing an active agent delivery device
An active agent delivery device comprises (a) microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided...
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5066784 |
Method for using substrate in peptide syntheses
A substrate comprises a porous polymeric material having a porosity of at least 75% and comprising pores having a diameter within the range 1 to 100 μm and being interconnected by a plurality of...
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5059630 |
Methods for manufacture of porous resin moldings, ultrafine fibers and ultrafine fiber nonwoven fabrics
This invention relates to methods for porous resin moldings, for ultrafine fibers for ultrafine fiber nonwoven fabrics. In essence, the invention comprises providing a molding, spun fiber or crude...
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5055494 |
Method of improving the resistance of polyphenylene ether articles to sunlight, and articles improved by this method
The resistance to discoloring of formed articles from polymer mixtures which comprise a polyphenylene ether and at least a second polymer can be improved by treating the surface of the formed...
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5047438 |
Porous rigid resins and process of preparation
Porous, rigid resin particles are prepared having a predetermined particle size distribution, surface area and porosity by polymerizing in the pores of porous inorganic template particles a...
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5035886 |
Active agent delivery device
An active agent delivery device comprises (a) microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided...
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5034422 |
Low density, high temperature resistant polymeric bodies
A low density, open cell polymeric body is formed by coating or filling a reticulated polymeric foam with a liquid-form polymer which is resistant to high temperatures, curing the liquid form...
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5032274 |
Process for producing fluorocarbon membranes and membrane product
Microporous or open ultrafiltration poly (tetrafluoroethylene-co-perfluoro-(alkyl vinyl ether)) (PFA) or poly (tetrafluoroethylene-co-hexafluoropropylene) (FEP) film membrane or hollow fibers...
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5021462 |
Porous material and its preparation
A porous polymeric material has cell sizes within the range 100 to 0.5 μm and total pore volume with respect to the overall volume of the material in the range 75 to 98% and includes cross-linked...
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5013767 |
Asymmetric gas separation membranes having improved strength
A dope for forming membranes and the resulting asymmetric gas separation membranes are disclosed, the membranes having graded density skins which exhibit improved permeability characteristics and...
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4992485 |
Microporous peek membranes and the preparation thereof
A microporous polyetheretherketone (PEEK) membrane in the form of films and hollow fibers formed without sulfonating the PEEK polymer. Solid fibers and articles are also claimed. A method of making...
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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...
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4965289 |
Substrate and process for making a substrate
A substrate comprises a porous polymeric material having a porosity of at least 75% and comprising pores having a diameter within the range 1 to 100 μm and being interconnected by a plurality of...
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4965291 |
Method of manufacturing porous membrane and porous membrane manufactured by the same method
A method of manufacturing a porous membrane by dissolving vinylidene fluoride polymer in a good solvent such as acetone and then causing solidification of the resultant solution in a non-solvent....
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4959396 |
Composition for microporous separators and method for its preparation
The composition comprises polyolefins, fillers and a plasticizer. It contains 0.2 to 20 wt. % etoxysiloxane, 5 to 60 wt. % polyolefin, 10 to 60 wt. % white black filler, and 10 to 75 wt. %...
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4948818 |
Method of making porous hydrophilic-lipophilic copolymeric powders
A precipitation polymerization process for producing a macroporous cross-linked copolymeric lattice, capable of adsorbing hydrophilic and lipophilic fluids, in which process there is copolymerized...
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4939183 |
Elastomeric membrane and its method of manufacture
A vehicle seat suspension has a thin high strength elastomeric membrane. The membrane is formed from block copolymer material by a process in which a sheet is extruded and tensioned to orient...
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4912141 |
Fibrous and cartilaginous tissue replacement
Disclosed is new type of implantable material for replacement of cartilaginous or fibrous tissue. The material has controlled porosity and is biocompatible. A method for making this material is...
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4910229 |
Process for producing hollow polymer latex particles
A process for producing hollow polymer latex particles, which comprises (1) adding a base to a carboxyl-containing polymer latex obtained by emulsion polymerization of a monomeric mixture...
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4906377 |
Fluorocarbon membranes and process for making fluorocarbon membranes
Microporous poly (tetrafluoroethylene-co-perfluoro (alkyl vinyl ether)) (PFA) or poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) membrane or hollow fibers are formed from a melt blend of 10...
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4880002 |
Stretchable porous sutures
Surgical sutures are provided that have an elastomeric and porous structure. The elastomeric porous structure can be formed from a plurality of fibers that are wound onto a stylet or onto an...
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4868222 |
Preparation of asymmetric membranes by the solvent extraction of polymer components from polymer blends
Asymmetric membranes are prepared by selectively treating a major surface of an incompatible polymer blend prepared by melt blending having at least one extractable polymer component and then...
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4859715 |
Microporous poly (arylether ketone) article
This invention provides a method for the preparation of an article from a blend of at least two molecularly compatible polymers by treating the blend with a solvent which is a solvent for one of...
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4845132 |
Hydrophilic porous membrane, method for production thereof, and plasma separator using said membrane
A hydrophilic porous membrane has graft chains of a hydrophilic monomer formed on the surface of a hydrophobic porous membrane so as to impart to the surface perfect hydrophilicity such that the...
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