Optical terpolymer of polyisocyanate, polythiol and polyene monomers
US6008296A · kind A · utility
16Cited by
25References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1995 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Apr 19, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/045
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A monomer composition characterized by being curable to form a resin suitable for optical products having a balanced refractive index and Abbe's number range and good tintability comprising a polyene monomer; a polyisocyanate, polyisothiocyanate, or an isocyanate monomer containing at least one isothiocyanate group; and a monomer having two or more active hydrogen groups such as polythiols, polyamines, and polyols. The invention also provides a special process for making the composition and for curing the composition to form a resin product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.