Polymerizable compositions for making thio containing resins including a thiocyanate salt catalyst and process for making thio containing resin articles
US5973098A · kind A · utility
18Cited by
5References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Oct 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/3868
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The polymerizable compositions comprise PA1 A) at least one polyiso(thio)cyanate monomer, and at least one polythiol monomer; or at least one episulfide compound and optionally one or more compounds having two or more functional groups capable of reacting with episulfide groups; and PA1 B) an effective amount of a thiocyanate salt as a polymerization catalyst. Application to the fabrication of optical articles, such as lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.