Heat stable reaction injection molded elastomers
US4272618A · kind A · utility
21Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Jun 9, 1981 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/918
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is a reaction injection molded polyurethane of improved properties comprising the cured reaction product of a high molecular weight polyhydric polyether, a low molecular weight active hydrogen containing compound of at least two functionality and a polyisocyanate. The reaction product is cured by subjecting it to an ambient temperature of from about 290.degree.-425.degree. F. for a time sufficient to achieve an improvement in properties. The invention is also a method for making such polyurethanes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.