Resin composition for polymerization casting and optical material
US5942303A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Feb 20, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A resin composition for polymerization casting containing: PA1 20 to 60% by weight of a monomer (1) represented by the formula (1) ##STR1## wherein R.sup.1 stands for a hydrogen atom or a methyl group, R.sup.2 stands for an alkylene group having 2 to 4 carbon atoms, m and n each is an integer of 2 to 5; PA1 10 to 40% by weight of a monomer (2) represented by the formula (2) ##STR2## wherein R.sup.3 stands for a hydrogen atom or a methyl group, R.sup.4 and R.sup.5 are the same or different groups and each stands for an alkylene group having 2 to 4 carbon atoms, j and k each is 0 or 1; and PA1 5 to 70% by weight of a monomer (3), the monomer (3) being identical with neither monomers (1) nor (2), and containing at least one vinyl group in a molecule thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.