Rigid foam with improved insulating power
US11718703B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 22, 2019 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Nov 8, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2205/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A rigid foam or composition allowing a rigid foam to be obtained made from polyurethane and/or polyisocyanurate. The rigid foam or composition includes polyols selected from polyester polyols and polyether polyols; the polyols include: 5 to 50% of a polyester polyol A by weight relative to the total weight of the polyols; and a polyol B selected from polyester polyols B and polyether polyols B. The polyester polyol A is of general formula Rx-Ry-Z-Ry′-Rx′ in which Z is a C3 to C8 alcohol sugar chosen from glycerol, sorbitol, erythritol, xylitol, araditol, ribitol, dulcitol, mannitol and volemitol. Ry and Ry′ are diesters of formula —OOC—Cn-COO— in which n is between 2 and 34, and Rx and Rx′ are identical or different C2 to C12 monoalcohols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.