Light stable one-shot urethane-urea elastomers
US6562932B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2001 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Oct 12, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/755
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for the production of an optically clear, light-stable polyurethane-urea elastomer having an onset softening point of at least 130° C., processed at ambient temperature and casted in a mold at an isocyanate index of 95 to 120. This process comprises reacting: A) a liquid polyisocyanate or polyisocyanate prepolymer having an NCO group content of about 5 to about 50%, an average functionality of 2 to 3, a viscosity of less than 5,000 mPa.s at 25° C.; and B) an isocyanate-reactive component; in the presence of C) at least one organometallic catalyst. The present invention also relates to the optically clear, light-stable polyurethane-urea elastomers produced by this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.