Liquid crystal resin, method for making the same, liquid crystal resin composition, and molded article
US7914699B2 · kind B2 · utility
6Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2004 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Oct 21, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A liquid crystal resin comprises structural units derived from at least two types of aromatic diols. The liquid crystal resin generates 100 ppm or less of acetic acid gas, less than 20 ppm of phenol gas, and less than 100 ppm of carbon dioxide gas when the liquid crystal resin is retained at a melting point +10° C. (or at 335° C. when the melting point is less than 325° C.) for 30 minutes in a helium gas atmosphere. The present invention provides a liquid crystal resin or a composition containing this resin by which metal corrosion, clouding of glass, bulging of molded articles, and the like are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.