| Patent Number |
Title Of Patent |
Date Issued |
| 5112942 |
Polymide compositions |
May 12, 1992 |
| Copolyimides and their precursors are disclosed comprising units represented by the formula ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl, with the proviso that R.sub.1, R.sub.2, R.su |
| 5068131 |
Method for production of electronic coatings |
November 26, 1991 |
| In humid atmospheres (e.g., 40% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane polyimides tend to be unstable in the sense that during spin coating operations undesirable precipitate |
| 5037673 |
Method of spin coating a solution of partially fluorinated polyamic acid polymer and cycloalipha |
August 6, 1991 |
| In humid atmospheres (e.g., 55% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane polyamic acid polymers tend to be unstable in the sense that during spin coating operations undesirable |
| 5006370 |
Compositions for production of electronic coatings |
April 9, 1991 |
| In humid atmospheres (e.g., 55% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis [4-(aminophenoxy)phenyl]hexafluoropropane polyamic acid polymers tend to be unstable in the sense that during spin coating operations undesirable |
| 4997869 |
Production of electronic coatings by spin coating a partially fluorinated polyimide composition |
March 5, 1991 |
| In humid atmospheres (e.g., 40% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane polyimides tend to be unstable in the sense that during spin coating operations undesirable precipitate |
| 4996254 |
Production of electronic coatings by spin coating a partially fluorinated polyamic acid composit |
February 26, 1991 |
| In human atmospheres (e.g., 55% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane polyamic acid polymers tend to be unstable in the sense that during spin coating operations undesirable |
| 4956451 |
Compositions for production of electronic coatings |
September 11, 1990 |
| In humid atmospheres (e.g., 40% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane polyimides tend to be unstable in the sense that during spin coating operations undesirable precipitate |
| 4950734 |
Compositions for production of electronic coatings |
August 21, 1990 |
| In humid atmospheres (e.g., 55% relative humidity or above) solutions of 2,2-bis(3,4-dicarboxyphenyl)hexafluoropropane dianhydride/2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane polyamic acid polymers tend to be unstable in the sense that during spin coating operations undesirable |
| 4927896 |
Process for polymerizing monoallylamine |
May 22, 1990 |
| A water-soluble salt of monoallylamine is polymerized in an aqueous reaction medium at a temperature of about 30.degree.-80.degree. C. in the presence of a polymerization initiator comprising about 3-15% by weight of hydrogen peroxide and about 1-700 ppm of a multi-valent metal ion, base |
