Aromatic copolyesters
US4868278A · kind A · utility
7Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1988 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Jan 14, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/605
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Melt processable, aromatic copolyesters containing 15 to 40 mole % of 4-oxybenzoyl moieties from 0.25 to less than 2.5 mole % of randomizing moieties, which are preferably 2-6 oxy naphthoyl moieties, the balance of moieties being equimolar proportions of moieties derived from hydroquinone and isophthalic acid. The preferred polymers are made by a dispersion polymerization process using as a dispersion aid a finely divided particulate material having at least 95% by weight of particles with at least one dimension less than 1 micron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.