Polymers with imide groups, and comprising a polyester free from aliphatic unsaturation
US4046835A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Mar 3, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer is disclosed that results from the reaction of: PA1 A. a polyimide of the formula: ##STR1## in which the symbol D represents a divalent radical selected from the class consisting of the radicals ##STR2## WHERE Y represents H, CH.sub.3 or Cl and m is 0 or 1, the symbol A represents an organic radical of valency n which may contain up to 30 carbon atoms, and n represents a number at least equal to 2; PA1 B. a polyamine of the formula EQU (NH.sub.2).sub.p B (II) in which the symbol B represents an organic radical of valency p which may contain up to 30 carbon atoms, and p represents a number at least equal to 2; and PA1 C. a linear polyester, free from aliphatic unsaturation, and of molecular weight at least equal to 1,500, the amounts of these reactants being such that there are 1.2 to 5 imide groups per NH.sub.2 group, and the polyester represents up to 50% of the weight of the polyimide/polyamine/polyester combination. A process for making the polymer is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.