Polycarbonate exhibiting improved heat resistance from cycloalkylidene diphenol
US4638027A · kind A · utility
21Cited by
5References
33Claims
0Family size
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Key dates
| Filing date | Dec 20, 1984 |
| Grant date | Jan 20, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic, linear, high molecular weight, end-capped aromatic polycarbonate polymers exhibiting improved heat resistance derived from: PA1 (i) a carbonate precursor; and PA1 (ii) at least one dihydric phenol represented by the general formula ##STR1## wherein X is selected from monocyclic cycloalkylidene radicals containing from 10 to about 16 ring carbon atoms. These polycarbonate polymers have an intrinsic viscosity in methylene chloride at 25.degree. C. of at least 0.38 dl./gm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.