Process for the preparation of foams characterized by isocyanurate and urethane linkages
US4092276A · kind A · utility
37Cited by
6References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1977 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Mar 10, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Foams characterized by isocyanurate and urethane linkages are prepared by condensing: (a) an organic polyisocyanate with a polyol or (b) a quasi-prepolymer in the presence of a blowing agent and a catalytically effective amount of an alkali metal salt of an organic phosphinic acid. The catalysts of the invention offer the advantages of longer cream times and fully cured foams in acceptable times, thus, finding particular utility in pour-in-place and slab stock foaming applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.