Polycarbonate from cycloalkylidene tetra alkyl substituted diphenol
US4554309A · kind A · utility
18Cited by
11References
50Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1984 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Jun 14, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermoplastic polymer exhibiting improved heat resistance comprised of the polymerized reaction products of (i) a carbonate precursor, and (ii) at least one dihydric phenol represented by the general formula ##STR1## wherein: R is independently selected from alkyl radicals; PA0 R.sup.1 is independently selected from monovalent hydrocarbon radicals; PA0 X is selected from cycloalkylidene radicals containing from 8 to about 16 ring carbon atoms; PA0 each n is two; and PA0 m represents a whole number having a value of from 0 up to the number of replaceable hydrogen atoms present on X.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.