Methods of producing rigid polyurethane foams for interior or exterior use for automobiles
US5026739A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 12, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jul 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of producing interior and exterior structural members of automobiles composed of rigid polyurethane foam, which comprises foaming a composition comprising: PA0 (a) polyisocyanates selected from the group consisting of diphenylmethane diisocyanate, polyphenylenepolymethylene polyisocyanate and their modified products; and PA0 (b) polyols which have a hydroxyl value of 400-550 and contain an ethylene oxide adduct to hydroquinone having a hydroxyl value of 60-430 in amounts of 20-40% by weight based on the polyols, the adduct being represented by the general formula of ##STR1## wherein m and n are integers of not less than 1, respectively. The resultant rigid polyurethane foams have high heat resistance and toughness as well as high mechanical properties, but have no voids therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.