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| Number | Title | Issue Date |
| 7311966 | Porous insulating film and its laminates A porous insulating film comprising a highly heat resistant resin film having a fine porous structure with a mean pore size of 0.01-5 μm in at least the center of the film, and a porosity of 15-80%. A laminate is prepared by forming a heat resistant adhesive layer ... | 12/25/2007 |
| 7303811 | Porous insulating film and its laminates A porous insulating film comprising a highly heat resistant resin film having a fine porous structure with a mean pore size of 0.01-5 μm in at least the center of the film, and a porosity of 15-80%. A laminate is prepared by forming a heat resistant adhesive layer ... | 12/04/2007 |
| 7132473 | Composition for forming porous film, porous film and method for forming the same, interlevel insulator film, and semiconductor device Provided are a composition for forming film which can form porous film excelling in dielectric constant, adhesiveness, uniformity of the film, mechanical strength and having low hygroscopicity; porous film and a method for forming the film; and a high-performing and... | 11/07/2006 |
| 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 produce carbon aerogels derived from polyimide aerogel composed of a ri... | 07/11/2006 |
| 7022377 | Method for producing porous polyimide resin and porous polymide resin A method of producing porous polyimide resin that enables pores to be formed in a precursor of polyimide resin, with its form of microphase-separated structure wherein a dispersive compound is dispersed in the precursor of polyimide resin being kept unchanged, so as... | 04/04/2006 |
| 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 comprising 2,3,3′,4′-biphenyltetracarboxylic dianhydride a po... | 11/09/2004 |
| 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 agents, thermal and oxidative stability aids to improve the properties of t... | 07/27/2004 |
| 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 comprising 2,3,3',4'-biphenyltetracarboxylic dianhydrid... | 06/10/2003 |
| 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 wherein the pores all satisfy the conditions: 1) the differen... | 05/20/2003 |
| 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 material. The rigid foams are highly stable and highly te... | 01/14/2003 |
| 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 -amino groups, which is derived from a natural amino acid, and a foamed article thereof. The water-swellab... | 11/26/2002 |
| 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 for preparing same.... | 10/15/2002 |
| 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 resistance and is low in density and mean pore s... | 06/04/2002 |
| 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 materials. Also disclosed are methods of forming integrated circ... | 05/21/2002 |
| 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 film made from the material; and a process for production of... | 04/30/2002 |
| 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 compound to a polyimide precursor to form a micro-domain stru... | 04/16/2002 |
| 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 composition is prepared by crosslinking a thermally decomposable... | 01/29/2002 |
| 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 backbone comprise a diene and a dienophile. The diene may advanta... | 11/06/2001 |
| 6294588 | 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 for preparing same.... | 09/25/2001 |
| 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 volume change of 1 to about 20% by a pressure ... | 05/22/2001 |
| 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 the ring structures are preferably included in the backbon... | 01/09/2001 |
| 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 functionalities and/or adding thermolabile groups, wherein a... | 12/05/2000 |
| 6140380 | Blowing agent and method for producing foamed polymers and related compositions A silicate-based blowing agent and method for producing foamed polymers provides a blowing agent containing at least one metal silicate, boric acid or a salt thereof, a peroxy compound, a reaction initiator and, optionally, a desiccant. The blowing agent ... | 10/31/2000 |
| 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 volume change of 1 to about 20% by a pressure ... | 07/04/2000 |
| 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 employing linear aliphatic diamine and aromatic diamine con... | 05/02/2000 |
| 5997791 | 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 for preparing same.... | 12/07/1999 |
| 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 crosslinking agent, preferably an organic base containing a... | 12/07/1999 |
| 5998491 | Super-absorbing polymeric networks Super-absorbing polymeric networks of crosslinked polyaspartates are produced from crosslinked polysuccinimide. Super-absorbing polymeric networks are produced in a single reaction vessel by crosslinking polysuccinimide with at least one organic polyamine... | 12/07/1999 |
| 5994418 | 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 volume change of 1 to about 20% by a pressure ... | 11/30/1999 |
| 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 components. The foam matrix for such composites is prepared using N... | 10/19/1999 |
| 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 product made from an organic polyisocyanate having at leas... | 07/06/1999 |
| 5900440 | 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 greater than 19 to 1, is the reaction product made from a... | 05/04/1999 |
| 5898040 | 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 variety of applications. In preparing the foams, an organic... | 04/27/1999 |
| 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 aqueous base wherein the ratio of water to crosslinked poly... | 03/30/1999 |
| 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 with neat or a solution of alkali metal hydroxide to form the... | 01/12/1999 |
| 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 organic crosslinking agent, preferably an organic base conta... | 12/08/1998 |
| 5847012 | 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 variety of applications. In preparing the foams, an organic... | 12/08/1998 |
| 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 epoxy and a suitable solvent such as methyl ethyl ketone. U... | 11/17/1998 |
| 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## --R-- is at least one group selected from the group... | 10/20/1998 |
| 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 precursor and then polymerizing the precursor to entrap uniform... | 09/08/1998 |
