Heat stable reaction injection molded elastomers
US4254069A · kind A · utility
24Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Apr 30, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/914
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention is a method for making reaction injection molded polyurethane of improved properties. The product comprises 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 the resulting polyurethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.