Liquid crystalline copoly(ester-imide)s and a process for the preparation thereof
US5843541A · kind A · utility
8Cited by
5References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1996 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Dec 23, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2929
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to liquid crystalline copoly(ester-imides) and a process for the preparation thereof. In particular, the invention relates to liquid crystalline copoly(esteri-imides) comprising structural units derived from N-(3'-hydroxyphenyl)-trimellitic acid imide or N-(4'-carboxyphenyl)trimellitic acid imides optionally in combination with aromatic dicarboxylic acids, dioles or hydroxy acids. The invention also concerns the use of these copolymers in polymer blends, in moulded articles, in fibres, filaments and sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.