Melt preparation of copolycarbonate with alkaline compound catalyst and boric acid compound catalyst
US5286834A · kind A · utility
8Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Sep 14, 1992 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Sep 14, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/524
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A copolymeric polycarbonate containing repeating constituent units having formula [I] below and repeating constituent units having formula [II] below in a molar ratio of from 98:2 to 40:60. ##STR1## The above-described copolymeric polycarbonates have excellent resistance to chemicals, heat resistance and flame retardancy without compromising the impact resistance and good hues intrinsic to polycarbonates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.