Thermotropic main-chain liquid crystalline polymers and method of increasing the melt processibility of polyester-based liquid crystalline polymers
US7175779B1 · kind B1 · utility
29Cited by
10References
20Claims
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Key dates
| Filing date | May 3, 2000 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | May 3, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3809
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A thermotropic main-chain liquid crystalline homo- or copolymer forming a liquid crystalline phase and containing an aromatic monomer with functional groups in ortho- or meta-position. The polymer exhibits both isotropic and anisotropic properties. The present invention also provides a method for the preparation of the present polymers as well as a method of increasing the melt-processibility of polyester-based liquid crystalline polymers comprising the step of incorporating into the polymers 1 to 30 mol-% of, e.g., a ortho-substituted monomer with hydroxyl and/or carboxylic groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.