Wholly-aromatic thermotropic liquid crystal polyester and sealing material for electric and electronic parts
US5767223A · kind A · utility
11Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1997 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Jul 28, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A thermotropic liquid crystal polyester and a sealing material used for electric and electronic parts prepared from the thermotropic liquid crystal polyester, which polyester can be molded at low temperatures, while which polyester has heat resistance capable of well withstanding the process such as soldering. The thermotropic liquid crystal polyester is characterized in that it contains five kinds of specified repeating structural units in the respective ratios and it meets specific conditions of an intrinsic viscosity or the temperature of complete melting and storage elastic modulus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.