Poly(aryl ether)-poly(aryl carbonate) block copolymers and their preparation
US4880884A · kind A · utility
11Cited by
11References
12Claims
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Key dates
| Filing date | Apr 27, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Apr 27, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/42
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing novel poly(aryl ether)-(poly aryl carbonate) block copolymers by the decarboxylation of copolycarbonates prepared by the condensation of two different aromatic dihydroxy compounds and a carbonate precursor such as phosgene. At least one of the aromatic diols must have at least one electron-withdrawing group located in a position ortho or para to at least one of its hydroxy groups and at least one of the diols must not have any electron-withdrawing groups in a position ortho or para to either of its hydroxy groups. The method is particularly effective in making crystalline block copolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.