Process for the manufacture of polyisocyanurate foams
US4066580A · kind A · utility
16Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Jun 7, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the manufacture of urethane group containing polyisocyanurate foams produced by mixing polyisocyanates and polyols and (if required) frothing agents, auxiliaries and additives in the presence of a co-catalyst system which consists of a 1,3,5-tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazine and an organic mono- or polycarboxylic acid, a polyesterol with an acid number greater than 4 or a mono-ester of polycarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.