Rigid foam comprising a polyester polyol
US11180605B2 · kind B2 · utility
1Cited by
6References
18Claims
0Family size
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Key dates
| Filing date | Aug 24, 2017 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Aug 24, 2037 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04B1/74
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rigid foam or a composition allowing a rigid foam to be obtained, including a polyester polyol or a polymer including a polyester polyol, the polyester polyol being obtained by a first polycondensation (a) of a C3 to C8 sugar alcohol Z and two identical or different C4 to C36 diacids Y and Y′ and a second polycondensation (b) of the product obtained in (a) with two identical or different C2 to C12 diols X and X′.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.