Polyarylate formation by ester interchange reaction using .gamma.- gamma lactones as diluent
US4533720A · kind A · utility
4Cited by
22References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Sep 13, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/81
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In a process for preparing aromatic polyesters (polyarylates) by heating a bisphenol (e.g., Bisphenol-A), at least one dicarboxylic acid (e.g., terephthalic acid and isophthalic acid) and acetic anhydride, a gamma-butyrolactone, such as gamma-butyrolactone, is employed a diluent, reducing sublimation of reactants, and resulting in higher molecular weight of the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.