Polyurethane foams having an integral skin using a mixture of polyols as the chain extender
US4065410A · kind A · utility
62Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/05
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a process for making polyurethane elastomer moldings from PA1 A. organic polyisocyanates PA1 B. polyhydroxyl compounds having molecular weights in the range from about 1800 to about 10,000, PA1 C. a chain extender, PA1 D. a blowing agent and PA1 E. optionally the auxiliaries and additives commonly used in making polyurethanes, The improvement wherein said chain extender (c) is a polyol mixture comprising PA1 I. ethylene glycol and PA1 Ii. at least one other polyol having a molecular weight below 1800 and wherein said polyol mixture has an average molecular weight below about 600.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.