Method for producing an optical material having a high refractive index
US5424339A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1994 |
| Grant date | Jun 13, 1995 |
| Priority date | — |
| Expiry date | Jan 5, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/382
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An optical material with a high refractive index comprising a resin which is obtainable by polymerization and curing of a composition comprising the following components (A), (B) and (C): PA1 component (A): a sulfur-containing (meth)acrylic monomer represented by the following formula [I], or a mixture of the monomer [I] and a sulfur-containing (meth)acrylic monomer represented by the following formula [II]: ##STR1## in each of which formulas, R.sup.1 represents a hydrogen atom or a methyl group, R.sup.2 and R.sup.3 independently represent a hydrocarbyl group of 1 to 12 carbon atoms, X represents a halogen atom except fluorine, and n represents 0 or an integer of 1 to 4, provided that those groups which are in plurality may be the same or different, PA1 the weight ratio of the compound [I]/the compound [II] being from 10/0 to 1/9; PA1 component (B): a hydroxy(meth)acrylic monomer represented by the following formula [III]: ##STR2## wherein R.sup.5 represents a hydrogen atom or a methyl group, R.sup.4 represents a hydrocarbyl group of 1 to 20 carbon atoms which may or may not contain an ether oxygen atom, Y represents a halogen atom except fluorine, and m represents 0 or an integer …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.