| Patent Number |
Title Of Patent |
Date Issued |
| 4999070 |
New articles of manufacture and their production |
March 12, 1991 |
| 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 films, sheets, panels, boards, |
| 4964936 |
Method of making foam-filled cellular structures |
October 23, 1990 |
| A non-flexible, non-resilient recurable cellular material, prepared by exposing cured polyimide foam to an atmosphere of steam at an elevated pressure, is introduced into a honeycomb or like structure so that the cells are at least partially filled with the recurable cellular material. |
| 4943599 |
Recurable and cured cellular materials |
July 24, 1990 |
| Cured polyimide foam is exposed to an atmosphere of steam at elevated temperature and pressure for a period of time sufficient to convert the foam into a non-flexible, non-resilient recurable cellular material. Preferably the process is conducted such that the cellular material is re |
| 4943598 |
Recurable and cured cellular materials |
July 24, 1990 |
| Cured polyimide foam is exposed to an atmosphere of steam at elevated temperature and pressure for a period of time sufficient to convert the foam into a non-flexible, non-resilient recurable cellular material. Preferably the process is conducted such that the cellular material is re |
| 4908265 |
Articles of manufacture and their production |
March 13, 1990 |
| 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 films, sheets, panels, boards, |
| 4900761 |
Production of polyimide foams |
February 13, 1990 |
| A polyimide precursor mixture having a solids content of about 50 to about 77 (preferably about 65 to about 75) weight percent is subjected to a multistaged thermal treatment in which the precursor is heated to one or more temperatures sufficient to obtain a consolidated but friable cell |
| 4898763 |
Cured polyimide foam structures and their production |
February 6, 1990 |
| A body of cured polyimide foam is treated with steam to produce a non-flexible, non-resilient cellular structure. A molding member is impressed into this structure to a depth less than the full thickness of the structure. The structure is then cured to polyimide foam with the molding |
| 4897234 |
Articles of manufacture and their production |
January 30, 1990 |
| 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 films, sheets, panels, boards, |
| 4883827 |
Recurable and cured cellular materials |
November 28, 1989 |
| Cured polyimide foam is exposed to an atmosphere of steam at elevated temperature and pressure for a period of time sufficient to convert the foam into a non-flexible, non-resilient recurable cellular material. Preferably the process is conducted such that the cellular material is re |
| 4874452 |
Articles of manufacture and their production |
October 17, 1989 |
| 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 films, sheets, panels, boards, |
| 4791275 |
High temperature compliant roll particularly adapted for xerography |
December 13, 1988 |
| A heated roll suitable for use as a fuser roll in a xerographic processes is formed from a sheet of flexible, resilient, polyimide foam. An electrical heating circuit is adhesively secured thereto. The circuit is preferably disposed between a pair of polyimide film sheets which, in t |
| 4708972 |
Steam resistant modified polyimide foams |
November 24, 1987 |
| A composition and a process for the preparation of modified polyimide foams possessing outstanding resistance to high humidity environments which comprises the step of preparing a foamable composition by mixing a solution of an ester of benzophenonetetracarboxylic acid dianhydride and |
| 4576862 |
Polyimide laminant and process for the preparation of same |
March 18, 1986 |
| A laminate and a method for its preparation comprising a polyimide foam, a fire-resistant, heat-activated adhesive overlaying a skin on the foam and a polyimide film adhered to the skin, with the laminate being prepared by contacting a foam in contact with the adhesive and film under hea |
| 4562112 |
Polyimide foam and process for the preparation of same |
December 31, 1985 |
| A polyimide and a process for its preparation wherein the polyimide is prepared from reaction of an organic tetracarboxylic acid or derivative thereof with a mixture of an aromatic diamine and an amine-terminated butadiene-nitrile copolymer. The polyimides of the invention are partic |
| 4539342 |
Polyimide foam prepared from amino terminated butadiene acrylonitrile reactant |
September 3, 1985 |
| A polyimide and a process for its preparation wherein the polyimide is prepared from reaction of an organic tetracarboxylic acid or derivative thereof with a mixture of an aromatic diamine and an amine-terminated butadiene-nitrile copolymer. The polyimides of the invention are partic |
| 4535101 |
Polyimide of 2,2-bis(4-(4-aminophenoxy)phenyl)-hexafluoropropane and process for the preparation |
August 13, 1985 |
| A polyimide and a process for its preparation wherein the polyimide is prepared from reaction of an organic tetracarboxylic acid or derivative thereof with a mixture of an aromatic diamine and an amine-terminated fluoroether. The polyimides of the invention are particularly useful in |
| 4535099 |
Polyimide foam from mixture of silicon containing diamine and different aromatic diamine |
August 13, 1985 |
| A polyimide and a process for its preparation wherein the polyimide is prepared from reaction of an organic tetracarboxylic acid or derivative thereof with a mixture of an aromatic diamine and an amine-terminated silicone. The polyimides of the invention are particularly useful in the |
