Heat resistant liquid crsytalline polymers
US5397502A · kind A · utility
9Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1993 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Jun 10, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/52
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The heat resistance of polyester liquid crystalline polymers containing repeat units in selected ratios derived from hydroquinone, 4,4'-biphenol, terephthalic acid, 4-hydroxybenzoic acid, and one or both of 4,4'-bibenzoic acid and 2,6-naphthalene dicarboxylic acid is improved by the addition thereto of 15 to 3000 ppm of an alkali metal or 50 to 3000 ppm magnesium or calcium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.