Polymer compositions based on polythiourethanes for the manufacture of organic glasses
US5310847A · kind A · utility
9Cited by
5References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Jun 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31551
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present patent application relates to a polyurethane composition for organic glasses characterized in that it comprises: a first constituent formed by a polyisocyanate at least di-functional, and a second constituent formed by an acyclic saturated monomer bearing at least three reactive functions with respect to isocyanates to form carbamate links, among which reactive functions at least 40% in number are --SH mercapto groups, the proportion of the reactive functions being at least 45% by weight with respect to the molecular weight of the monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.