Hydrophilic polyurethane elastomers
US5118779A · kind A · utility
45Cited by
11References
48Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1989 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Oct 10, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/904
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A non-toxic hydrophilic polyurethane elastomer having less than about 0.5% by weight extractables and which is curable in the absence of heat is disclosed. The elastomers are prepared from suitable hydrophilic polyurethane oligomers in combination with suitable ultraviolet light absorbers which become chemically bound into the elastomer during the polymerization (curing) thereof and thus become essentially non-extractable therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.