Thermally stable polyurethane elastomer useful in molding flexible automobile exterior body parts
US4049636A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Feb 25, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Flexible automobile exterior body parts are molded from a polyurethane elastomer prepared from a reaction mixture comprising: PA1 A. a poly(oxypropylene)-poly(oxyethylene) glycol of molecular weight of from about 1500 to about 4000 containing 15 to 50% by weight oxyethylene groups; PA1 B. a "graft" polyol of molecular weight from about 2500 to about 4500, prepared by the in situ polymerization of one or more ethylenically unsaturated monomers in a poly(oxypropylene) and/or poly(oxypropylene)-poly(oxyethylene) glycol containing less than 15% by weight oxyethylene groups; PA1 C. methylenebis(4-phenylisocyanate); PA1 D. 1,4-butanediol. The invention also relates to this polyurethane elastomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.