Novel neopentyladipate based prepolymers and reaction injection molded products made therefrom
US4857561A · kind A · utility
10Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1988 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Aug 30, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2410/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to a polyisocyanate comprising the reaction product of PA0 (a) an isocyanate selected from the group consisting of methylenebis(phenylisocyanate), polymethylenepoly(phenylisocyanate), and mixtures thereof, and PA0 (b) a polyester polyol having a hydroxyl functionality of from 2 to 3 and a molecular weight of from about 750 to about 3500, said polyester polyol prepared by reacting neopentyl glycol and adipic acid, the isocyanate group content of said reaction product from about 14% to about 28% by weight. The invention is also directed to a RIM process using such prepolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.