Process for the production of polyurethane foams
US11814467B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Dec 19, 2016 |
| Grant date | Nov 14, 2023 |
| Priority date | — |
| Expiry date | Aug 28, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the production of a polyurethane foam having a resilience of at least 50%, said process comprising reacting (i) a first polyether polyol comprising polyether chains containing no more than 20% ethylene oxide content, and having a primary hydroxyl content of no more than 25%; (ii) a second polyether polyol comprising polyether chains containing at least 50% ethylene oxide content; and (iii) one or more aromatic polyisocyanates, in the presence of one or more catalysts having gelling and/or blowing activities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.