Process for producing aromatic-aliphatic copolycarbonate
US6271336A · kind A · utility
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Key dates
| Filing date | Nov 30, 2000 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Nov 30, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/1608
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing an aromatic-aliphatic copolycarbonate which is excellent in impact resistance and heat resistance and has large Abbe number, small photoelasticity constant, and excellent color tone. The process comprises conducting polycondensation in a reactor made of a stainless steel comprising at least 12 wt % nickel, at least 22 wt % chromium, and at least 50 wt % iron.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.