Resin for high-refractivity lenses and lenses made of same resin
US4542201A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1984 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Nov 6, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F218/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein are a resin for high-refractivity lenses, formed by copolymerizing at least one carbonate compound represented by the general formula (I): ##STR1## wherein X is a hydrogen, chlorine or bromine atom, and R is a hydrogen atom or a methyl group with at least one unifunctional monomer represented by the general formula (II): ##STR2## wherein R' is a hydrogen atom or a methyl group and Y represents ##STR3## wherein X' is a chlorine or bromine atom, q is an integer of 0-5, and r is 0 or 1 as well as high-refractivity lenses made of such a resin. The lens-making resin according to this invention has a high refractive index, is excellent in processability such as grinding processability, thermal resistance, solvent resistance and impact resistance. Moreover, it features outstanding miscibility between the unifunctional monomer and the carbonate upon copolymerization thereof, and minimized polymerization strain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.