Quotables
"Telephone, n. An invention of the devil which abrogates some of the advantages of making a disagreeable person keep his distance. "
Ambose Bierce
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7160974 | Thermoplastically processable polyurethanes (TPU) with self-extinguishing properties, a process for their preparation and their use The present invention relates to thermoplastically processable polyurethane elastomers (TPU) with tensile strengths of >35 MPa (measured in accordance with EN ISO 527-3), with shrinkages of | 01/09/2007 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 6472443 | Porous polymer media Highly crosslinked monolithic porous polymer materials for chromatographic applications. By using solvent compositions that provide not only for polymerization of acrylate monomers in such a fashion that a porous polymer network is formed prior to phase s... | 10/29/2002 |
| 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 |
| 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 |
| 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 |
| 6172127 | Preparation of polyimide foam The invention herein relates to a process of preparing a novel polyimide foam having superior heat-resistance, flame retardancy, homogeneous size and distribution of cells, and low density, wherein a polyimide precursor in a granular form is prepared by m... | 01/09/2001 |
| 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 |
| 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 |
| 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 |
| 5830987 | Amino-acrylate polymers and method An amino-acrylate polymer is prepared by the reaction of an aliphatic hydroxyl polyacrylate monomer, like pentaerythritol triacrylate, with a polyamine like a hexyldiamine to provide a rigid fast gelling and curing polymer, which polymer may be modified w... | 11/03/1998 |
| 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 |
| 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 additives, the foam structure having a pore size which decreases ... | 03/24/1998 |
| 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 method of potting electrical components comprising the ste... | 06/11/1996 |
| 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 chemical resistances, which is controllable in terms of p... | 04/23/1996 |
| 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 contact with and adjacent the surface of the conveyor belt to ... | 08/16/1994 |
| 5322916 | Method for the preparation of amide oligomers and polybenzazole polymers therefrom A polyamide precursor of a polybenzazole polymer is prepared by reacting an aromatic bis(alkenyl)ester with a ring forming, aromatic diamine. The precursor can be prepared in an organic solvent for the monomers to form a soluble polyamide precursor which ... | 06/21/1994 |
| 5298531 | Process for the preparation of polyimide foam A polyimide foam is prepared by heating a mixture comprising an alkyl ester of 4,4'-oxydiphthalic acid and a diamine at a temperature of 60° to 350° C. This foam is elastic and flame-retardant and has an excellent resistance to acid and alkali.... | 03/29/1994 |
| 5286760 | Process for reducing impurity levels in methylene diphenyamines Disclosed herein is a process for preparing a reaction product containing methylene diphenylamine comprising reacting aniline with an aldehyde, in the presence of a low level of an acid wherein the acid level is reduced before digesting reaction mixture a... | 02/15/1994 |
| 5234966 | Polyimide foam of desired density Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C1 to C12 li... | 08/10/1993 |
| 5225450 | Unfoamed foil suitable as an adhesive The invention is directed to an unfoamed foil of at least one thermoplastic resin, said foil being capable of serving as an adhesive when softened and having included therein at least one blowing agent, and to the use thereof in preparing laminates.... | 07/06/1993 |
| 5198475 | Polyol and utilization thereof A polyurethane resin, rigid polyurethane foam and composite thereof prepared by using a polyol comprising a phenol resin base polyol mixed with an aminophenol base polyol or a polyphenylpolyxylylenepolyamine base polyol or a polymethylenepolyphenylpolyami... | 03/30/1993 |
| 5192810 | Method and apparatus for manufacturing dimpled structures from elastic cloth A method of forming complex polyimide foam shapes by impregnating a low density, open cell, reticulated foam with polyimide foam precursor, placing the combination in a mold, closing the mold, then heating the assembly to the foaming and curing temperatur... | 03/09/1993 |
| 5135959 | Method of impregnating reticulated foam with polymide foam and products thereof A method of forming complex polyimide foam shapes by impregnating a low density, open cell, reticulated form with polymide foam precursor, placing the combination in a mold, closing the mold, then heating the assembly to the foaming and curing temperature... | 08/04/1992 |
| 5122546 | Polyimide foam precursor A slurry is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C1 to C12 linear or branched alkyl or... | 06/16/1992 |
| 5096932 | Polyimide foam products and methods Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C1 to C12 li... | 03/17/1992 |
| 5077318 | Method for producing polyimide foam of desired density Polyimide foam of desired density is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C1 to C12 li... | 12/31/1991 |
| 5064867 | Production of foamed polymer structures Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, prior to the application of the microwave radiation... | 11/12/1991 |
| 5047436 | Method of improving foam fire resistance through the introduction of inorganic particles thereinto A method of improving the flame resistance of foams, such as open cell polyimide foams, through the introduction of finely divided non-metallic inorganic particles which are gel forming and insoluble in water and polar organic liquids into the foam cells.... | 09/10/1991 |
| 5036111 | Expanded materials with nadimide resin base Expanded material obtained by heating a composition comprising at least one hermosetting nadimide resin, said heating being performed at a temperature and during a period which are sufficient to cause the expansion of said composition by release of cyclope... | 07/30/1991 |
| 5009696 | Fertilizer with a degradative coating A fertilizer with a degradative coating wherein the dissolving-out rate of the fertilizer component can be controlled by adjusting the composition of the coating component and the residual capsule after the dissolving out degrades by light is provided, wh... | 04/23/1991 |
| 4999070 | New articles of manufacture and their production By compressing and heat curing a non-resilient, non-flexible recurable material formed by subjecting cured polyimide foam to the action of pressurized steam, a wide variety of useful articles may be produced. These include tough, flame-resistant plastic f... | 03/12/1991 |
| 4994501 | Foaming putty plug repair composition and method A hole repair method and composition suitable for mufflers, and engine exhaust systems, and any situation where high temperature resistance is needed. A putty like mass of polyimide resin and from 28% to 35% of low boiling alcohol is used to fill the hole... | 02/19/1991 |
| 4988739 | Method of improving foam fire resistance through the introduction of metal oxides thereinto A method of improving the flame resistance of foams, such as open cell polyimide foams, through the introduction of finely divided metal oxide particles into the foam cells. A stable water suspension or gel is prepared using particles of metal oxides, suc... | 01/29/1991 |
| 4980004 | Method of manufacturing polyimide foam shapes having improved density and cell size uniformity A method of manufacturing lightweight shapes from polyimide foam in which density discontinuities such as cavities, varying cell size, or swirl marks are substantially eliminated. A block or bun of polyimide foam is prepared in a conventional manner which... | 12/25/1990 |
