1,3-bis(4-hydroxyphenyl)-1,3-dialkylcyclohexanes and polycarbonates prepared therefrom
US5344999A · kind A · utility
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4Claims
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Key dates
| Filing date | Oct 1, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Oct 1, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C39/17
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1,3-Bis(4-hydroxyphenyl)-1,3-dialkylcyclohexanes, as illustrated by 1,3-bis(4-hydroxyphenyl)-1, 3-dimethylcyclohexane, may be prepared by the reaction of phenol with a 1,5-dialkyl-1,4-cyclohexadiene under acidic conditions. Polycarbonates prepared therefrom have high glass transition temperatures and are expected to be ductile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.