Blowing agents for polyurethane foam
US4906672A · kind A · utility
48Cited by
10References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jul 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2203/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Improved methods are provided for incorporating carbon dioxide and carbon dioxide generating compounds into polyurethane foam forming compositions as blowing agents to eliminate or reduce the amount of low boiling liquid auxiliary blowing agents, such as methylene chloride and chlorofluorocarbons conventionally used in the manufacture of urethane foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.