Preparation of biureto polyisocyanates
US4983762A · kind A · utility
7Cited by
1References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 23, 1990 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Apr 23, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C273/1809
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Clear, precipitate-free, storage-stable biureto polyisocyanates, well adopted for paint applications, are prepared by reacting at least one aliphatic, alicyclic or arylaliphatic monomeric diisocyanate with water, at a temperature of at least 70.degree. C. and under an absolute pressure of at least 1.2 bar, including a partial pressure of carbon dioxide of at least 0.2 bar.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.