Method for preparing biuret polyisocyanate
US9701624B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 2014 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Apr 15, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C273/1872
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for continuously preparing biuret polyisocyanate, comprising: a mixed solution of a diisocyanate and a catalyst with water vapour, in an aerosol form, are continuously reacted in a first reactor; the product obtained therefrom is brought into a second reactor for a further reaction; a tail gas from the second reactor is condensed and refluxed, and the non-condensable gas is brought into a tail gas treatment system; a reaction liquid obtained in the second reactor is further reacted in a third reactor; and then separation is performed for removing monomers, so as to obtain biuret polyisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.