Polycarbonate copolymers, articles formed therefrom, and methods of manufacture
US11001709B2 · kind B2 · utility
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17References
21Claims
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Key dates
| Filing date | May 5, 2017 |
| Grant date | May 11, 2021 |
| Priority date | — |
| Expiry date | May 5, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polycarbonate copolymer contains aromatic carbonate units; optionally siloxane units; and resorcinol arylate ester units. The resorcinol arylate ester units of the polycarbonate copolymer are derived from a resorcinol composition having a hydroquinone content of 50 to 1200 parts per million, a catechol content of 5 to 29 parts per million, and a phenol content of 0 to 2400, each as determined by high performance liquid chromatography, and further comprising an acid stabilizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.