Process for production of thermoplastic copolymer
US7888456B2 · kind B2 · utility
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21Claims
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Key dates
| Filing date | Sep 13, 2007 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Sep 13, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/30
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for continuously producing a thermoplastic copolymer, in which a copolymer (A) containing unsaturated carboxylic acid alkyl ester units and unsaturated carboxylic acid units is produced and in succession heat-treated to perform intramolecular cyclization reaction by dehydration and/or dealcoholization reaction, for producing a thermoplastic copolymer (B) containing glutaric anhydride units and the unsaturated carboxylic acid alkyl ester units. The obtained copolymer is excellent in heat resistance and colorless transparency and very small in foreign matter content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.