Polycarbonate from bis[4'-(4-hydroxyphenyl)-phenyl]alkanes
US5281689A · kind A · utility
7Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1992 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Dec 11, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Bis[4-(4-hydroxyphenyl)-phenyl]alkanes, as illustrated by 2,2-bis[4-(4-hydroxyphenyl)-phenyl]propane, may be prepared by the reaction of a bisphenol A ester or a similar compound with a p-trialkyltin-substituted anisole, followed by demethylation with a Lewis acid such as boron tribromide. Polycarbonates prepared therefrom are ductile and have high glass transition temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.