Polyisocyanate polyaddition polyol manufacturing process using stabilizers
US10017599B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Oct 6, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
PIPA polyols are made by reacting a low equivalent weight polyol with a polyisocyanate in the presence of a stabilizer. Low amounts, if any, of water are present. Useful stabilizers include functionalized linear or branched polyethers having at least one polyether segment having a molecular weight of 200 to 8000, wherein the functionalized polyether is terminated at one end with one or more isocyanate groups or with one or more isocyanate-reactive groups linked to the polyether through one or more urea and/or urethane groups, and further wherein all or a portion of such functionalized polyether contains one or more biuret, isocyanurate, urea or allophonate groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.