K-type polarizer and preparation thereof
US6949207B2 · kind B2 · utility
7Cited by
48References
47Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2002 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Jun 25, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2800/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a polarizer is described whereby a pre-polarizing article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a thermal acid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.