Optical information recording disk
US4405671A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1982 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Jan 20, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is an optical information recording disk comprising as a base material thereof a polymer or copolymer having a glass transition temperature of at least 50.degree. C. and a structural unit derived from a monomer which is an ester of an .alpha.,.beta.-unsaturated carboxylic acid and an alicyclic alcohol represented by the general formula: ##STR1## wherein n is an integer of 1-5, R denotes a hydrogen or an alkyl or alkenyl group, and, when n stands for an integer of 2-5, the Rs may be the same or different. The above disk does not develop deformation such as warping or twisting by changes in humidity and is uniform optically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.