Method for producing a plastic lens
US4607087A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1983 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Mar 23, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A plastic lens which has high hardness and excellent scratch resistance and can form a transparent and uniform reflection preventing film through vacuum deposition, is produced by mixing PA0 (a) diethylene glycol bis(allyl carbonate) with PA0 (b) at least one of organic peroxides having a decomposition temperature at selected half-life value for ten hours of not higher than 80.degree. C. and PA0 (c) at least one of organic peroxides having a decomposition temperature at selected half-life value for ten hours of 90.degree.-110.degree. C., which have no copolymerizability to the diethylene glycol bis(allyl carbonate) (a), as a polymerization initiator, and polymerizing and casting the resulting mixture in a desired lens-forming mold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.