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8063114 |
Inorganic mesoporous material having chiral twisted structure and process for producing the same
A chiral inorganic mesoporous material characterized by having a chiral twisted structure and being mesoporous; a process for producing the material; and a method of using the material. The process...
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8058321 |
Syntactic foam incorporating vapor-grown carbon fibers
Fibered particles combine microscale spheroid particles and nanoscale fibers in an integrated body. Fibered particles may be combined with a matrix precursor to form syntactic foams incorporating...
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8022110 |
Porous polyimide
A porous polyimide obtained by removing a silica phase from an organic-inorganic polymer hybrid having a molecule structure in which a polyimide phase and the silica phase are held together by...
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7781492 |
Foam/aerogel composite materials for thermal and acoustic insulation and cryogen storage
The invention involves composite materials containing a polymer foam and an aerogel. The composite materials have improved thermal insulation ability, good acoustic insulation, and excellent...
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7745504 |
Process for producing porous spherical polyamide particle
Porous spherical particles of polyamide 11 or polyamide 12 can be produced by an industrially advantageous process which comprises the steps of mixing a polyamide solution of polyamide 11 or...
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7521485 |
Organic, open cell foam materials, their carbonized derivatives, and methods for producing same
Organic, small pore area materials (“SPMs”) are provided comprising open cell foams in unlimited sizes and shapes. These SPMs exhibit minimal shrinkage and cracking. Processes for preparing SPM...
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7074880 |
Polyimide aerogels, carbon aerogels, and metal carbide aerogels and methods of making same
A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to...
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6814910 |
Aromatic polyimide foam
A flexible polyimide foam having an apparent density of 13.5 to 900 kg/m3 and a glass transition temperature of 300° C. or higher can be prepared by mixing an aromatic tetracarboxylic acid ...
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6767930 |
Polyhedral oligomeric silsesquioxane polyimide composites
Performance additives in high performance polymers using polyhedral oligomeric silsesquioxanes (POSS) and polyhedral oligomeric silicates (POS) as nanoscopic reinforcements, porosity control...
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6576683 |
Aromatic polyimide foam
A flexible polyimide foam having an apparent density of 70 kg/m3 or less and a glass transition temperature of 300° C. or higher can be prepared by mixing an aromatic tetracarboxylic acid ...
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6565962 |
Polyimide porous film
A polyimide porous film obtained by drying and imidizing a polyimide precursor porous film which is substantially homogeneous on both sides, the polyimide porous film having pores on both sides...
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6506808 |
Microcellular thermoset foams and method for producing the same
Microcellular rigid foams with a matrix consisting of cross-linked duromers, especially of polytriazine resins, and with an apparent density of 20 to 95 percent of the density of the compact matrix...
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6486285 |
Water-swellable polymer gel and process for preparing the same
A water-swellable polymer gel prepared by reacting an ester of a carboxyl group-containing polysaccharide with a compound having at least two α-amino groups, which is derived from a natural amino ...
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6465536 |
Superabsorbing fibers and films and processes for preparing same
Superabsorbent fiber and film compositions comprising partially acidified, hydrolyzed, internally plasticized, crosslinked, superabsorbing fibers or film derived from polysuccinimide and processes...
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6399669 |
Porous material and a method for producing the same
A porous material made of a dry gel of a polyimide resin having an apparent density of 800 kg/m3 or less and a mean pore size of 1 μm or less is disclosed. The porous material exhibits high heat ...
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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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6380271 |
Material for electrical insulating organic film, electrical insulating organic film and process for the preparation thereof
The present invention provides a material for electrical insulating organic film, superior in electrical properties, thermal properties and low water absorption; an electrical insulating organic...
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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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6342454 |
Electronic devices with dielectric compositions and method for their manufacture
A novel dielectric composition is provided that is useful in the manufacture of electronic devices such as integrated circuit devices and integrated circuit packaging devices. The dielectric...
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6313185 |
Polymers having backbones with reactive groups employed in crosslinking as precursors to nanoporous thin film structures
Nanoporous materials are fabricated from polymers having backbones with reactive groups used in crosslinking. In one aspect of preferred methods and compositions, the reactive groups in the...
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6235803 |
Hollow polymide microspheres
A shaped article composed of an aromatic polyimide has a hollow, essentially spherical structure and a particle size of about 100 to about 1500 μm, a density of about 1 to about 6 pounds/ft3 and a ...
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6172128 |
Nanoporous polymers crosslinked via cyclic structures
Nanoporous polymeric materials are fabricated in which polymeric strands are crosslinked via ring structures. Preferred ring structures are formed de novo during crosslinking, and at least some of...
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6156812 |
Nanoporous material fabricated using polymeric template strands
Compositions and methods are provided in which nanoporous polymeric materials are produced via stable, polymeric template strands having reactive groups that can be used for forming crosslinking...
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6084000 |
Hollow polyimide microspheres
A shaped article composed of an aromatic polyimide has a hollow, essentially spherical structure and a particle size of about 100 to about 1500 μm, a density of about 1 to about 6 pounds/ft3 and a ...
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6057379 |
Method of preparing polyimide foam with excellent flexibility properties
A method of preparing polyimide foam produces a foam with excellent flexibility properties. The method of preparing polyimide foam is performed by foaming polyimide percursor which is prepared by...
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5998492 |
Super-absorbing polymeric networks
Disclosed are methods of producing super-absorbing polymeric networks of polyaspartates from crosslinked polysuccinimide. In one preferred aspect, polysuccinimide is first reacted with an organic...
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5968598 |
PPD-T structural composites
Composite materials made wholly from aromatic polyamides are prepared, which have the advantage of better performance and less delamination than composites composed of chemically distinct...
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5919833 |
Open celled foam and method of making an open celled foam
A lightweight open celled foam, having a density no greater than 6 pounds per cubic foot (pcf) and a ratio of imide to amide groups greater than 1 to 1 and no greater than 19 to 1, is the reaction...
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5889072 |
Process for preparing superabsorbing crosslinked polyaspartate salt
A process for preparing superabsorbing crosslinked polyaspartate salt by reacting crosslinked polysuccinimide having a weight average molecular weight of at least 20,000 Daltons with neat base or...
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5859179 |
Forming superabsorbent polymer
A method of preparing superabsorbent polymer as crosslinked polyaspartate salt by reacting polysuccinimide dissolved in organic solvent with crosslinker and reacting the polysuccinimide in situ...
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5847013 |
Superabsorbing polymeric networks
Disclosed are methods of producing super absorbing polymeric networks of polyaspartates from crosslinked polysuccinimide. In one preferred method aspect, polysuccinimide is first reacted with an...
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5837739 |
Loaded syntactic foam-core material
A syntactic foam-core material and method for its production are disclosed wherein glass microspheres and chopped fiberglass are dispersed within a slurry comprised of a suitable resin such as an...
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5824766 |
Polyamideamic acid resin prepolymers, high heat resistant polyamideimide foams prepared therefrom, and processes for preparing them
A polyamideamic acid resin prepolymer represented by formula A having isophorone diamine as one of monomers, ##STR1## in which k, l, m and n are integer of 1 or more, respectively, and ##EQU1##...
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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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5786404 |
Open celled low density foam and method of making such an open celled foam
A lightweight open celled foam, having a density no greater than 0.5 pounds per cubic foot (pcf), preferably between 0.1 and 0.4 pcf, and a ratio of imide to amide groups greater than 1 to 1 and no...
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5776990 |
Foamed polymer for use as dielectric material
The present invention relates to an insulating foamed polymer having a pore size less than about 1000 Å made from a copolymer comprising a matrix polymer and a thermally decomposable polymer by h...
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5763498 |
Moldable thermoplastic polymer foam beads
A continuous process for making moldable foam beads comprising a non-crosslinked or crosslinked thermoplastic polymer foam are produced by mixing a composition comprising a non-crosslinkable or...
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5739218 |
Radially layered copoly (amidoamine-organosilicon) dendrimers
Radially layered copoly-dendrimers having unusual surface properties and novel applications have been synthesized and characterized. These are the first copolymeric dendrimers composed of a...
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5731359 |
Vibration-absorbing elements
A vibration-absorbing element comprised of a foamed thermoplastic polymer selected from the group consisting of polyamide elastomers, EPDM polymers and SEBS polymers containing conventional...
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5589519 |
Process of extruding lightly crosslinked polyolefin foam
A method and apparatus for producing a lightly crosslinked polyolefin foam and articles made therefrom is disclosed. According to the method, a polyolefin resin is lightly crosslinked, mixed with a...
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5525644 |
Potted electrical components and methods of making the same
This invention relates to an article comprising a potted electrical component in a structure, wherein the electrical component is potted in a polyimide composition. The invention also relates to a...
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5525682 |
Superabsorbent polymer and process for producing same
A process for preparing a novel superabsorbent polymer which is readily hydrolyzed and conform to environment by reacting a polysuccinimide with a diamine in an aqueous solution or an organic...
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5514726 |
Polymer foams with inherent nonflammability and thermal stability and methods of preparation thereof
Polymeric foams with novel chemical compositions are prepared by the condensation of specially-synthesized precursors, which contain (in addition to carbon and hydrogen) one or more of the...
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5510395 |
Film forming solution, porous film obtained therefrom and coated material with the porous film
A film forming solution which does not require aprotic polar solvents, a porous film of poly(4,4'-oxydiphenylenepyromellitimide) obtained from the film forming solution which has excellent heat and...
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5422377 |
Microporous polymer films and methods of their production
A process for producing thin microporous polymeric films for a variety of uses. The process utilizes a dense gas (liquified gas or supercritical fluid) selected to combine with a solvent-containing...
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5393795 |
Polymer blend containing a modified dense star polymer or dendrimer and a matrix polymer
Dense star polymers or dendrimers, modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell, act as molecular nucleating agents in forming a polymer blend.
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5393797 |
Small cell foams containing a modified dense star polymer or dendrimer as a nucleating agent
A small cell foam having a modified dense star polymer or dendrimer is described. This modified dense star polymer or dendrimer has a highly branched interior of one monomeric composition and an...
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5387621 |
Porous membranes based on unstable polymer solutions
Porous, distensible, gel-like membranes which in tubular form are suitable as implants, e.g., vascular prostheses and a process for the preparation thereof is described. The membranes are formed by...
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5387617 |
Small cell foams and blends and a process for their preparation
Dense star polymers or dendrimers, modified by capping with a hydrophobic group capable of providing a hydrophobic outer shell, act as molecular nucleating agents. These modified dense star...
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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...
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