Optical terpolymer of polyisocyanate, polythiol and polyene monomers
US6777494B1 · kind B1 · utility
5Cited by
25References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1999 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Mar 29, 2019 |
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; and 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.