Blowing agents for foaming polyurethane having no ozone depletion potential and uses and preparations thereof
US5283003A · kind A · utility
37Cited by
9References
19Claims
0Family size
Inventor
Key dates
| Filing date | Mar 4, 1993 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Mar 4, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A blowing agent composition and method of use that is not destructive to the ozone while producing a polyurethane integral skin foam product having high dimensional stability with minimal or no shrinkage. The blowing agent of the present invention is comprised of specific ratios of two or more components having no known ozone depleting characteristics. The components include methylene chloride, methyl formate, and one or more of n-pentane, isopentane, and cyclopentane. In one embodiment, the resulting product also demonstrates fire retardancy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.