Polyol blends useful for producing viscoelastic foam
US11124595B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Sep 22, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyol composition is made by polymerizing a mixture of ethylene oxide and propylene oxide onto a mixture of at least one diol initiator and at least one triol initiator, followed by polymerizing 100% propylene oxide or a mixture of at least 90 weight percent propylene oxide and at most 10 weight percent ethylene oxide. The resulting polyol composition has a hydroxyl equivalent weight of 200 to 400 and an average nominal functionality of 2.05 to 2.95 hydroxyl groups/molecule. 5 to 30 percent of the hydroxyl groups of the coinitiated polyether polyol are primary hydroxyl groups and polymerized ethylene oxide constitutes 40 to 63 percent of the total weight of the coinitiated polyether polyol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.