Interphase process for the production of fully aromatic polyester carbonate from alkali salt of aromatic dicarboxylic acid and bis-chlorocarbonic ester of diphenol
US4569984A · kind A · utility
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9Claims
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Key dates
| Filing date | Sep 10, 1984 |
| Grant date | Feb 11, 1986 |
| Priority date | — |
| Expiry date | Sep 10, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/64
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aromatic polyester carbonates may be produced by the interphase process by reacting salts of aromatic dicarboxylic acids with excess bis-chlorocarbonic esters of diphenol at a pH value of from 6 to 8.5 and by subsequently polycondensing the product at a pH value of from 9 to 14.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.