Process for preparing in situ reticulated polyurethane foam
US4670477A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1986 |
| Grant date | Jun 2, 1987 |
| Priority date | — |
| Expiry date | Jan 9, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2425/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
An improved process for in situ production of a reticulated, open-cell polyurethane foam which comprises reacting a polyester/polyether polyol mixture with an aromatic polyisocyanate having a ratio of isocyanate moieties to aromatic moieties of about 2:1 in the presence of a catalyst and a blowing agent, PA0 the improvement comprises: PA0 said polyol mixture being PA0 (a) 80 to 95 parts by weight of polyester polyol and PA0 (b) 20 to 5 parts by weight of polyoxypropylene polyether polyol or a mixed poly(oxyethylene/oxypropylene polyether polyol, each having at least one polymer of ethylenically unsaturated monomers dispersed therein and a stabilizing surfactant for polyether polyurethane foam, PA0 and said process produces a polyurethane foam which has excellent strength properties and an exceeding low resistance to air flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.