Chlorofluorocarbon-free flexible polyurethane foams and method of making with blowing efficiency enhancers
US5166185A · kind A · utility
2Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1990 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Jun 6, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
N,N'-di-sec-alkenyl-or-di-sec-alkyl-substituted methylene diphenyl diamines are effective curing agents for making polyurethane foams from MDI-based polyisocyanates. The diamines are especially advantageous since foams of lower density having lower hardness can be obtained without utilizing chlorofluorocarbous (CFC's) and without sacrificing tensile strength, tear strength, SAG or compression set values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.