Isopropylidenediphenol-based polyether polyols, processes for their production, and foams produced therefrom
US12162976B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Feb 14, 2022 |
| Grant date | Dec 10, 2024 |
| Priority date | — |
| Expiry date | Apr 9, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/521
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Isopropylidenediphenol-based polyether polyols, processes for their production, foams produced using such isopropylidenediphenol-based polyether polyols, such as PUR-PIR rigid foams, as well as to processes for producing such foams. The polyether polyols have an internal block comprising polymerized ethylene oxide moieties and an external cap comprising polymerized propylene oxide moieties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.