Thermotropic polyester anhydride polymers
US4414381A · kind A · utility
11Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Dec 7, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G67/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A melt-processable aromatic polyester anhydride characterized in that from 5 to 80% of the units linking the reactant residues in the polymer chain have the formula: ##STR1## the remaining linkages between the residues of the reactants being of the formula: ##STR2## optionally together with linkages of the formula: ##STR3## substantially all of said remaining linkages being disposed in coaxial or parallel and oppositely directed manner with respect to the residues to which they are linked, the polyester anhydride having a solubility of less than 5% by weight in dimethyl sulphoxide at room temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.