Synthetic resin lens
US4930879A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Sep 26, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A Synthetic resin lens having a surface hard coating comprises a synthetic resin lens body and a surface hard coat deposited on the lens body. The synthetic resin lens body is made of a resin obtained by copolymerizing monomers consisting essentially as synthetic resinous components of 10 to 80 percent by weight of at least one diester of itaconic acid and mesaconic acid, 10 to 80 percent by weight of at least one allyl compound and 5 to 50 percent by weight of diethyleneglycol bis(allylcarbonate). The surface hard coat is formed by curing a coating composition comprising 50 to 800 parts by weight of at least one organic silicon compound, 100 parts by weight of colloidal silica, 50 to 600 parts by weight of a polyfunctional compound such as a polyfunctional epoxy compound, a polyalcohol, a polycarboxylic acid, or a polycarboxylic anhydride and 0.01 to 5.0 percent by weight of a curing catalyst based on the residual solids in the composition after curing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.