High resiliency molded urethane foams containing high levels of graft copolymer polyols
US4477601A · kind A · utility
6Cited by
6References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 1983 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Nov 16, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2483/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyether based polyurethane foam is disclosed which contains high levels of reinforcing graft copolymer polyols. The graft copolymer polyol serves to open cells and to add firmness to the foam. This foam is stabilized by incorporating a blend consisting essentially of 3 to 22 weight percent of a surfactant designed for conventional urethane foams, with 78 to 97 weight percent of a surfactant designed for molded high resiliency urethane foams. The surfactants are of the polysiloxane-polyoxyalkylene copolymer type. The method of preparing this foam is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.