| Patent Number |
Title Of Patent |
Date Issued |
| 5268193 |
Low dielectric constant, low moisture uptake polyimides and copolyimides for interlevel dielectr |
December 7, 1993 |
| A group of polyimides and copolyimides made from 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride (6FDA) or 2,2-bis(3,4-dicarboxyphenyl)propane dianhydride (IPAN) their acid or ester forms and selected aromatic diamines are disclosed which are useful for substrate coatings a |
| 5206091 |
Low dielectric constant, low moisture uptake polyimides and copolyimides for interlevel dielectr |
April 27, 1993 |
| A group of polyimides and copolyimides made from 6FDA, IPAN, or their acid or ester forms, and selected aromatic diamines are disclosed which are useful for substrate coatings and interlevel dielectrics in on-chip and multi-chip package applications. In such applications these polymers |
| 5089593 |
Polyimide containing 4,4'-bis(4-amino-2-trifluoromethylphenoxy)-biphenyl moieties |
February 18, 1992 |
| Polyimides useful in multilayer electronic devices containing the 4,4'-bis(4-amino-2-trifluoromethylphenoxy) biphenyl moiety have low dielectric constants, low moisture uptake, high thermal degradation stability, low glass transition temperature. |
| 4992527 |
Polyamide, polyimide, and polyamide-imide polymers of diamino-t-butylbenzene |
February 12, 1991 |
| Resinous condensation polymers of polycarboxylic acid compounds and aromatic diprimary amines comprising diamino-t-butylbenzenes are described. In particular, film-forming polyamides, polyimides and polyamide-imides and their copolymers made using diamino-t-butylbenzenes which have a |
| 4975521 |
Polyamide, polyimide, and polyamide-imide polymers and copolymers using 3,5-diamino-t-butylbenze |
December 4, 1990 |
| Soluble, film-forming, polyamides, polyimides, and polyamide-imides and their copolymers made using 3,5-diamino-t-butylbenzene are described. These polymers have some solubility in organic solvents such as N-methylpyrrolidone, a high Tg, excellent thermal stability, lower density and |
| 4973659 |
Polyamide from diamino-t-butylbenzene |
November 27, 1990 |
| Resinous condensation polymers of polycarboxylic acid compounds and aromatic diprimary amines comprising diamino-t-butylbenzenes are described. In particular, film-forming polyamides, polyimides and polyamide-imides and their copolymers made using diamono-t-butylbenzenes which have a |
| 4968780 |
Polyamide, polyimide, and polyamide-imide polymers of diamino-t-butylbenzene |
November 6, 1990 |
| Resinous condensation polymers of polycarboxylic acid compounds and aromatic diprimary amines comprising diamino-t-butylbenzens are described. In particular, film-forming polyamides, polyimides and polyamide-imides and their copolymers made using diamino-t-butylbenzenes which have amino |
| 4946934 |
Polyamide from 3,5-diamino-t-butylbenzene |
August 7, 1990 |
| Soluble, film-forming, polyamides, polyimides, and polyamide-imides and their copolymers made using 3,5-diamino-t-butylbenzene are described. These polymers have some solubility in organic solvents such as N-methylpyrrolidone, a high Tg, excellent thermal stability, lower density and |
| 4876385 |
Batch or semicontinuous pseudocumene oxidation and catalyst recovery and recycle |
October 24, 1989 |
| A method is disclosed for the liquid-phase oxidation of pseudocumene in the presence of an oxidation catalyst comprising cobalt, manganese, and bromine components wherein the metal catalyst are recycled to the oxidation reactor in the form of their oxalates. |
| 4822527 |
Process for preparation of anthraquinones and fluorenones |
April 18, 1989 |
| A process is disclosed for producing cyclized aromatic compounds by the liquid-phase air oxidation of 2-methyl-substituted biphenyls and diphenylmethanes in an acetic acid medium in the presence of a cobalt-manganese-bromine catalyst or a zirconium-cobalt-manganese-bromine catalyst w |
| 4816601 |
Process for the manufacture of trimellitic acid |
March 28, 1989 |
| A continuous process is disclosed for producing trimellitic acid by the liquid-phase air oxidation of pseudocumene in an acetic acid medium in the presence of a cobalt-manganese-bromine catalyst or a zirconium-cobalt-manganese-bromine catalyst wherein the mole ratio of cobalt-to-mang |
| 4804501 |
Process for preparation of anthraquinones and fluorenones |
February 14, 1989 |
| A process is disclosed for producing cyclized aromatic compounds by the liquid-phase air oxidation of 2-methyl-substituted biphenyls and diphenylmethanes in an acetic acid medium in the presence of a cobalt-manganese-bromine catalyst or a zirconium-cobalt-manganese-bromine catalyst w |
| 4786752 |
Catalyst recovery and recycle of catalysts in pseudocument oxidation process |
November 22, 1988 |
| A method is disclosed for recovery and recycle of metal catalyst components of a catalyst from the liquid-phase oxidation of pseudocumene in the presence of an oxidation catalyst comprising cobalt, manganese, and bromine components or cobalt, manganese, zirconium and bromine components |
