Method for producing polycarbonate copolymer
US7514522B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Feb 17, 2005 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Sep 29, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing a polycarbonate copolymer having structural repeating units represented by formulas (I) and (II):wherein each of R1 and R2, X, R3, R4, Y, a to d and n are defined in the application by reacting (A) a dihydric phenol, (B) a phenol-modified diol and (C) a carbonate precursor, wherein the phenol-modified diol is contains 500 ppm by mass or less of a hydroxybenzoic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.