Preparation of spirobiindane polyarylates, and spirobiindane polyarylate-polyethylene terephthalate copolymers, via melt polymerization
US4853457A · kind A · utility
1Cited by
8References
5Claims
0Family size
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Inventor
Key dates
| Filing date | Oct 26, 1987 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Oct 26, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/193
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The preparation of spirobiindane polyarylate compositions having reduced cyclic oligomer formation and glass transition temperature which can be varied depending upon the percent composition of linear diacids and linear dihydric phenols present therein. Spirobiindane polyarylate-polyester copolymers and methods for their preparation are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.