Process for producing melting-anisotropic, copolymerized polyester
US4621129A · kind A · utility
2Cited by
6References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 31, 1985 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Oct 31, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/60
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a melting-anisotropic copolymerized polyester containing an alkylene terephthalate component, which comprises reacting a starting polyester composed of a dicarboxylic acid and a diol with an oxyaromatic carboxylic acid to form a copolymerized oligomer, then conducting acylating reaction by the addition of an acylating agent and further conducting polycondensating reduction thereby producing a melting-anisotropic, copolymerized polyester having a logarithmic viscosity of at least 0.2 dl/g. According to this process, a polyester of excellent physical property can be obtained at a good production efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.