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6451348 |
Method of manufacturing porous matrix-type controlled release systems using emulsion technique
A method of manufacturing a porous matrix-type drug delivery system is provided. It comprises the steps of: dispersing, stirring, and emulsifying an aqueous solution of a drug in an organic solvent...
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6441055 |
Sensor membrane for determining oxygen concentrations and process for the preparation thereof
The invention relates to sensor membranes for determining oxygen concentrations and to a process for the preparation thereof, in which, in a polymer matrix which is permeable to oxygen, an...
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6426372 |
Method of producing porous calcined polyimide
Object: to provide a porous polyimide whose dielectric constant and refractive index are lowered while maintaining intrinsic performances of a polyimide, such as heat resistance, etc., and which is...
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6414043 |
Hydrogel materials with crystalline colloidal array of watervoids for detection and macromolecule separations
A method of making a novel composition of a porous medium comprising volume elements of both voids and pores wherein the voids are much larger than the mean size of the pores. The method includes a...
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6391932 |
Porous materials
Porous polyimide dielectric materials having low dielectric constants useful in electronic component manufacture are disclosed along with methods of preparing the porous polyimide dielectric...
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6387969 |
Porous article and process for producing porous article
A porous article having excellent heat resistance, a finely cellular structure, and a low dielectric constant; and a process for producing the porous article which comprises subjecting a polymer...
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6372808 |
Process for producing porous polyimide and porous polyimide
A porous polyimide having a finely cellular structure and having a low dielectric constant and heat resistance. The porous polyimide can be produced by a process comprising adding a dispersible...
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6355699 |
Process for manufacturing biomedical foams
The present invention provides an improved lyophilization process for forming biocompatible foam structures. The process allows the foam structures to be tailored for specific end uses. The foams...
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6323252 |
Superabsorbent polymers having improved processability
A composition comprising aqueous fluid absorbent polymer particles which have been heat-treated at temperatures greater than 170° C. for more than 10 minutes, wherein the composition has been...
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6255359 |
Permeable compositions and methods for their preparation
The present invention involves compositions having variable permeation and/or porosity and objects made therefrom. The compositions are prepared by dispersing a pore-forming agent in a polymer...
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6231926 |
Poromeric synthetic leathers
A process for producing poromeric synthetic leather comprises I. producing an essentially nonporous impregnate by impregnating a textile sheet material with an aqueous polyurethane dispersion and...
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6232386 |
Polymer composites having an oxyhalo surface and methods for making same
Oxyhalopolymer composites which include an oxyhalopolymer having free volume therein and an inorganic or organic material disposed in the free volume of the oxyhalopolymer are disclosed. Also...
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6136872 |
Freeze-dried polystyrene-polysiloxane foams
The present invention is a freeze-dried polystyrene-polysiloxane foam having a density of 0.05 to 0.8 grams per cubic centimeter and a void volume of 20 to 99 percent. These foams exhibit good...
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6136873 |
Water-absorbing, expanded, crosslinked polymers, the production and use thereof
Water-absorbing, expanded, crosslinked polymers obtainable by (I) foaming a polymerizable aqueous mixture which comprises (a) monoethylenically unsaturated monomers which contain acidic...
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6100306 |
Polymeric microbeads and methods of preparation
The present invention relates to porous crosslinked polymeric microbeads having cavities joined by interconnecting pores wherein at least some of the cavities at the interior of each microbead...
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6080796 |
Dissolving insecticide in monomer
Insecticides, and particularly termiticides, may be dissolved in monomers polymerized to form foamable polymers, such as polystyrene. The resulting monomer and insecticide may then be polymerized...
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6057376 |
Process to prepare low density porous crosslinked polymeric materials
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6048607 |
Porous film of high molecular weight polyolefin and process for producing same
The present invention relates to a porous or microporous film of a high molecular weight polyolefin excellent in strength and air-permeability and suitable for use in filtering materials,...
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6046246 |
Process for making fluorinated polymer adsorbent particles
Chemically resistant, strong fluorinated copolymer adsorbent particles for use in carrying out chromatographic separations are prepared by high shear, anaerobic reaction of a di-unsaturated...
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6040375 |
Composite foams, processes for their preparation and their use
The invention relates to a composite foam comprising from 10 to 90% by volume of SiO 2 aerogel particles and from 90 to 10% by volume of a foam, preferably a polyurethane and/or polyolefin foam, a...
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6010776 |
Microporous materials containing cross-linked oil
Microporous materials formed by thermally induced phase transition from a crosslinkable oil in combination with a thermoplastic polymer providing covalent bonding and immobilization of the oil...
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5994419 |
Preparation of rapidly dissolving/absorbing powders of hydrophilic/super absorbent (CO)polymers
Rapidly dissolving/absorbing free-flowing powders of hydrophilic/superabsorbent (co)polymers, having irregular nonspherical morphology and a particle size distribution ranging from 100 μm to 800...
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5989467 |
Ceramic foam precursor resin composition
The present invention is embodied in a ceramic foam made by mixing a liquid pre-ceramic resin and a liquid phenolic resin, allowing the resultant mixture to chemically foam, curing the mixture for...
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5990184 |
Polyisocyanate based aerogel
Process for making polyisocyanate based aerogels by trimerisation of an organic polyisocyanate in an organic solvent in the presence of a (co)polymer containing an isocyanate-reactive group,...
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5977194 |
High internal phase emusions and porous materials prepared therefrom
High internal phase emulsions having an internal aqueous phase of greater than 70 percent by volume and an external oil phase comprising a vinyl polymerizable monomer contain a surfactant capable...
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5969020 |
Microporous polymeric foams and microtextured surfaces
Highly uniform microporous foam suitable for medical applications and methods for preparing these foams. The highly uniform microporous foams are of controlled pore size that may be utilized in a...
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5962544 |
Microporous materials of ethylene-vinyl alcohol copolymer and methods for making same
A microporous shaped article is provided. The article comprises ethylene-vinyl alcohol copolymer which has an internal structure of a multiplicity of spaced, randomly dispersed, non-uniform shaped...
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5962539 |
Process and equipment for drying a polymeric aerogel in the presence of a supercritical fluid
A process for obtaining an aerogel from a polymeric material that is in the form a sol-gel in an organic solvent, by exchanging the organic solvent for a fluid having a critical temperature below a...
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5939198 |
Porous polytetrafluoro-ethylene and preparation
This invention relates to porous polyfluoroethylene (PTFE), shaped articles prepared therefrom, and to methods of preparing said articles.
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5922259 |
Cord of twisted polybenzazole fibers
There is provided a cord of twisted polybenzazole fibers, which has a tenacity of 35 g/d or higher and an elastic modulus of 800 g/d or higher. The cord has not only remarkably improved fatigue...
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5863957 |
Polymeric microbeads
The present invention relates to porous crosslinked polymeric microbeads having cavities joined by interconnecting pores wherein at least some of the cavities at the interior of each microbead...
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5856409 |
Method of making hydrophobic copolymers hydrophilic
A method for altering a macroporous cross-linked hydrophobic copolymeric lattice produced by precipitation polymerization in a solvent of at least one monounsaturated ester monomer and at least one...
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5840775 |
Porous polytetraflouroethylene and preparation
This invention relates to porous polyfluoroethylene (PTFE), shaped articles prepared therefrom, and to methods of preparing said articles.
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5840774 |
Low density microporous polymers and process
The disclosed invention is a crystalline microporous polymer and process for preparing a low density microporous polymer comprising, providing a mixture of a polymer and a polymer solvent, the...
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5804607 |
Process for making a foamed elastomeric polymer
The present invention relates to a process for forming a foamed elastomeric polymer. The process involves forming a reverse emulsion of liquid droplets in a continuous liquid phase of polymer...
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5760097 |
Methods of preparing polymeric microbeds
The present invention relates to porous crosslinked polymeric microbeads having cavities joined by interconnecting pores wherein at least some of the cavities at the interior of each microbead...
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5726211 |
Process for making a foamed elastometric polymer
The present invention relates to a process for forming a foamed elastomeric polymer. The process involves forming a reverse emulsion of liquid droplets in a continuous liquid phase of polymer...
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5723508 |
Method of fabricating emulsion freeze-dried scaffold bodies and resulting products
Scaffold bodies and methods for their fabrication are disclosed, and, more particularly, fabrication of scaffold bodies by freeze-drying emulsion of polymer solutions are disclosed.
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5721283 |
Porous polytetrafluoroethylene and preparation
This invention relates to porous polyfluoroethylene (PTFE), shaped articles prepared therefrom, and to methods of preparing said articles.
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5716997 |
Polymeric reticulated structure and method for making
A polymeric reticulated structure is prepared by mixing an ethylene-propylene copolymer having an ethylene content of at least 60% by weight or a thermoplastic block copolymer terminated with a...
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5708039 |
Smooth thin film powder coatings
A coating powder consisting essentially of generally spherical particles ranging in size from less than 2 to about 40 microns, 75% of whose volume consists of particles of from about 2 to about 20...
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5696175 |
Preparation of bonded fiber structures for cell implantation
A novel processing technique is reported to bond non-woven fibers and, thus, prepare structural interconnecting fiber networks with different shapes for organ implants. The fibers are physically...
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5677360 |
Hydrophilic polymer alloy, fiber and porous membrane comprising this polymer alloy, and methods for preparing them
A hydrophilic polymer alloy which has a permanent hydrophilic nature, a sufficient mechanical strength and a high safety and which is suitable for the formation of hydrophilic porous membranes...
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5677355 |
Continuous open-cell polymeric foams containing living cells
A polymeric foam with continuous, open-cell pores containing living cells suitable for medical applications and methods for preparing these foams. The microporous foams are of controlled pore size...
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5643512 |
Methods for producing ceramic foams using pre-ceramic resins combined with liquid phenolic resin
The present invention is embodied in a method of producing a ceramic foam. The steps for producing the ceramic foam include first mixing a liquid pre-ceramic resin with a liquid phenolic resin,...
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5571848 |
Method for producing a microcellular foam
The invention provides a method for producing a microcellular foam of a curable material by replicating a dissolvable particle preform and leaching away the dissolvable particle preform to yield...
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5556892 |
Organic aerogels from the sol-gel polymerization of phenolic-furfural mixtures
The sol-gel polymerization of a phenolic-furfural mixture in dilute solution leads to a highly cross-linked network that can be supercritically dried to form a high surface area foam. These porous...
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5525638 |
Process for the preparation of polybenzazole filaments and fibers
Described is a continuous process for removing polyphosphoric acid from a polybenzazole dope filament, which comprises: (a) contacting the dope filament with water or a mixture of water and...
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5508036 |
Devices for preventing tissue adhesion
A device for preventing adhesions or binding of tissue to tissue or of tissue to bone which comprises a composite of a first layer and a second layer, each of which comprises a biodegradable...
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5500451 |
Use of polyglycerol aliphatic ether emulsifiers in making high internal phase emulsions that can be polymerized to provide absorbent foams
A process for preparing high internal phase emulsions (HIPE) that can be polymerized to provide flexible, microporous, open-celled polymeric foam materials capable of absorbing aqueous fluids,...
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