Thermoplastic polyesters containing biphenylene linkages
US5138022A · kind A · utility
26Cited by
13References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Aug 1, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aliphatic polyesters of 3,4'-biphenyldicarboxylic acid and optionally 4,4'-biphenyldicarboxylic acid are prepared by contacting at least one aliphatic diol having from 2 to 12 carbon atoms with a lower alkyl diester or phenolic diester of 3,4'-biphenyldicarboxylic acid and, optionally, a lower alkyl diester or phenolic diester of 4,4'-biphenyldicarboxylic acid, in the presence of a catalyst at about 180.degree. to about 300.degree. C. These polyesters are suitable for use in making fibers, films, three dimensional molded articles, barrier containers and coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.