Process for the production of polyisocyanates
US4013701A · kind A · utility
12Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1975 |
| Grant date | Mar 22, 1977 |
| Priority date | — |
| Expiry date | May 8, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/905
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The instant invention relates to a process for producing modified polyisocyanates suitable for the production of hydrophilic foams, wherein an organic polyisocyanate is heat treated with a water-containing, organic sulphonic acid at a specified molar ratio and for a specified time. The invention further relates to the use of such modified polyisocyanates in producing a hydrophilic polyurethane foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.