Wholly aromatic thermotropic liquid crystal polyester resin composition, injection molded article thereof, and optical device using the molded article
US7713439B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2007 |
| Grant date | May 11, 2010 |
| Priority date | — |
| Expiry date | Mar 22, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/856
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a resin composition produced by melt-kneading a white pigment and a wholly aromatic thermotropic liquid crystal polyester. The resin composition can retain the excellent heat resistance and moldability of the wholly aromatic thermotropic liquid crystal polyester and have a satisfactory level of white light reflectance. The resin composition comprises 35 to 100 parts by weight of a white pigment particle and 100 parts by weight of a wholly aromatic thermotropic liquid crystal polyester, wherein the white pigment particle comprises 3 to 15 mass % of aluminum oxide and 97 to 85 mass % of a white pigment produced by a process including a roasting step and having a surface treated with the aluminum oxide (provided that the sum total of the white pigment and aluminum oxide is defined as 100 mass %). The resin composition can be produced by a process including a melt-kneading step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.