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| Number | Title | Issue Date |
| 7423070 | Surface-modified base matrices The present invention is a surface-modified base matrix comprised of a porous polymeric base matrix onto which branched hydrophilic polyhydroxy-functional polymers have been covalently attached, wherein the polyhydroxy-functional polymers are hyperbranched polymers ... | 09/09/2008 |
| 7368502 | Hydroxyphenyl cross-linked macromolecular network and applications thereof A dihydroxyphenyl cross-linked macromolecular network is provided that is useful in artificial tissue and tissue engineering applications, such as artificial or synthetic cartilage. The network is made by first providing a polyamine or polycarboxylate macromolecule ... | 05/06/2008 |
| 7282466 | Sulfur-functionalized carbon nanoarchitectures as porous, high-surface-area supports for precious metal catalysts The invention relates to sulfur-functionalized polymer gels and carbon gels, including aerogels, and such carbon gels containing platinum or metal nanoparticles. The platinum-containing gels may be useful as fuel-cell electrodes. ... | 10/16/2007 |
| 7265188 | Biodegradable polyester blend compositions and methods of making the same The present invention relates to tough and ductile biodegradable, aliphatic polyester blend compositions and methods for preparing such compositions. It relates to products made out of such blend compositions, including, but not limited to, films, fibers, nonwovens,... | 09/04/2007 |
| 7173070 | Foam cushion and method of making and using the same The present invention provides a foam cushion, a method of making the foam cushion, and a method of using the foam cushion. The foam cushion is formed from: (a) at least one of rubber and a resin; (b) a blowing agent; (c) a polymeric adhesion modifier; (d) a decompo... | 02/06/2007 |
| 7148264 | Method of producing macroporous cross-linked polymer particles The present invention relates to a method of producing one or more macroporous cross-linked polymer particles, which comprises polymerization and cross-linking of divinyl ether monomers in an inert solvent, in which method the polymerization is free radical initiate... | 12/12/2006 |
| 6924322 | Thio-,amine-,nitro-,and macrocyclic containing organic aerogels & xerogels An organic aerogel or xerogel formed by a sol-gel reaction using starting materials that exhibit similar reactivity to the most commonly used resorcinol starting material. The new starting materials, including thio-, amine- and nitro-containing molecules and functio... | 08/02/2005 |
| 6818676 | Foam cushion and method of making and using the same The present invention provides a foam cushion, a method of making the foam cushion, and a method of using the foam cushion. The foam cushion is formed from: (a) at least one of rubber and a resin; (b) a blowing agent; (c) a polymeric adhesion modifier; (d) a decompo... | 11/16/2004 |
| 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 |
| 6797738 | Open pore biodegradable matrices The invention is directed to a process for preparing porous polymer materials by a combination of gas foaming and particulate leaching steps. The invention is also directed to porous polymer material prepared by the process, particularly having a characteristic inte... | 09/28/2004 |
| 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 |
| 6511650 | Preparing porous hydrogel products This invention is directed to a new approach to form porous hydrogel materials by first creating gas pockets in the gel and then removing this gas. The removal of the gas creates a porous material, and the initial incorporation of sufficient gas allows on... | 01/28/2003 |
| 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 |
| 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 |
| 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 |
| 6369172 | Process for using nitric acid to oxidize polyarylene sulfide to polyarylene sulfoxide The invention relates to a process for using nitric acid to oxidize polyarylene sulfide to polyarylene sulfoxide, oxidizing at least 98% of the sulfide groups of the polyarylene sulfide to sulfoxide groups. According to the invention polyarylene sulfide i... | 04/09/2002 |
| 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 |
| 6281256 | Open pore biodegradable matrices The invention is directed to a process for preparing porous polymer materials by a combination of gas forming and particulate leaching steps. The invention is also directed to porous polymer material prepared by the process, particularly having a characte... | 08/28/2001 |
| 6194478 | Document feeding component and method of manufacture thereof A document feed component is presented comprising a foamed epichlorohydrin elastomer, a curing agent, and a blowing agent, wherein the document feed component has a dynamic coefficient of friction in the range of about 1.0 to about 3.0, a Shore O hardness... | 02/27/2001 |
| 6133330 | Aromatic polyimide foam A mechanically undensified aromatic polyimide foam is made from an aromatic polyimide precursor solid residuum and has the following combination of properties: a density according to ASTM D-3574A of about 0.5 pounds/ft3 to about 20 pounds/ft | 10/17/2000 |
| 6087411 | Document feeding component and method of manufacture thereof A document feed component is presented comprising a foamed epichlorohydrin elastomer, a curing agent, and a blowing agent. The elastomer optionally further includes activators, polymerization accelerators, and a filler material. An important feature of th... | 07/11/2000 |
| 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 |
| 6031069 | Triblock terpolymer, its use in medical products and process for its production A resorbable polymer suitable for producing a medical product, comprising a triblock terpolymer with a structure ABA formed from a biodegradable hard segment A and a biodegradable soft segment B, has as the soft segment a statistical terpolymer with a com... | 02/29/2000 |
| 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 |
| 5993952 | Document feeding component and method of manufacture thereof A document feed component is presented comprising a foamed epichlorohydrin elastomer, a curing agent, and a blowing agent. The elastomer optionally further includes activators, polymerization accelerators, and a filler material. An important feature of th... | 11/30/1999 |
| 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 |
| 5994423 | Urine absorber, method for producing it, urine absorbing method utilizing it and portable toilet A urine absorber superior in smell extinguishing and urine absorption properties and in absorption stability is to be prepared. To this end, a polymer of styrene and/or conjugate diene and acrylonitrile, containing a predetermined amount of a sulfonide an... | 11/30/1999 |
| 5958989 | Highly asymmetric ultrafiltration membranes The present invention relates to highly asymmetric polymer membranes for ultrafiltration (UF), and to a simplified method of their manufacture. Disclosed herein are UF membranes with a high degree of asymmetry between the size of pores at the skin face of... | 09/28/1999 |
| 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 |
| 5886059 | Highly asymmetric polyethersulfone filtration membranes Highly asymmetric polyethersulfone membranes prepared from a stable, clear, homogeneous solution or stable colloidal dispersion of polyethersulfone are described. The membranes have a porous skin possessing a high density of skin pores with an average dia... | 03/23/1999 |
| 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 |
| 5789452 | Polyarylene sulfide foams and a process for their production A foamed polyarylene sulfide according to the invention has a density which is reduced by at least 50% compared with the theoretical density of nonfoamed material, and is expediently produced by subjecting a polyarylene sulfoxide as such or a mixture of o... | 08/04/1998 |
| 5786397 | Foamable molding compositions Molding compositions or mixtures comprising a high-temperature-resistant polymer and at least one polymer containing sulfoxide groups are used for the production of a foam by exposure to heat. The foam is employed for heat-resistant insulating layers.... | 07/28/1998 |
| 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 greater than 19 to 1, is the reaction product made from a... | 07/28/1998 |
| 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 heating the copolymer above the decomposition temperature of... | 07/07/1998 |
