Process for producing rigid polyurethane foam
US4342842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1981 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Jul 6, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0066
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Rigid polyurethane foams having excellent heat resistance and impact resistance can be produced with good workability due to good flow properties by using a composition comprising a polyol, a polyisocyanate, a blowing agent and a reaction accelerator as essential component, characterized by using as the polyol, a mixture of (a) an alkylene oxide adduct of 4,4'-diaminodiphenylmethane having OH value of 280-600 mg KOH/g, (b) an aliphatic polyether having a hdyroxyl value of 450-800 mg KOH/g and 3 or 4 hydroxyl groups in the molecule, and (c) a polyether having a hydroxyl value of 30 to 100 mg KOH/g and 2 or 3 hydroxyl groups in the molecule, in limited amounts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.