	US 11,718,703 B2
	Rigid foam with improved insulating power
Pierre Etienne Bindschendler, Strasbourg (FR); Alexandru Sarbu, Strasbourg (FR); Rémi Perrin, Strasbourg (FR); Pierre Furtwengler, Paris (FR); Luc Avérous, Paris (FR); and Andréas Redl, Moussy-le-Vieux (FR)
Assigned to TEREOS STARCH & SWEETENERS BELGIUM, Aalst (BE); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); SOPREMA, Strasbourg (FR); and UNIVERSITE DE STRASBOURG, Strasbourg (FR)
Appl. No. 16/963,347
Filed by TEREOS STARCH & SWEETENERS BELGIUM, Aalst (BE); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); SOPREMA, Strasbourg (FR); and UNIVERSITÉ DE STRASBOURG, Strasbourg (FR)
PCT Filed Jan. 22, 2019, PCT No. PCT/EP2019/051491 § 371(c)(1), (2) Date Jul. 20, 2020, PCT Pub. No. WO2019/141868, PCT Pub. Date Jul. 25, 2019.
Claims priority of application No. 1800072 (FR), filed on Jan. 22, 2018.
Prior Publication US 2021/0246254 A1, Aug. 12, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C08G 18/16 (2006.01); C08G 18/42 (2006.01); C08G 18/76 (2006.01); C08J 9/14 (2006.01)

CPC C08G 18/163 (2013.01) [C08G 18/4241 (2013.01); C08G 18/7664 (2013.01); C08J 9/141 (2013.01); C08G 2110/0025 (2021.01); C08J 2203/14 (2013.01); C08J 2205/10 (2013.01)]

21 Claims

1. A rigid foam or composition allowing a rigid foam to be obtained made from polyurethane and/or polyisocyanurate, said foam or composition comprising polyols selected from polyester polyols and polyether polyols; said polyols comprising:

from 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;

said polyester polyol A being of general formula Rx-Ry-Rz-Ry′-Rx′, wherein Rz is a C3 to C8 alcohol sugar selected from glycerol, sorbitol, erythritol, xylitol, arabitol, ribitol, dulcitol, mannitol and volemitol, Ry and Ry′ are identical or different diesters of formula —OOC—C_n—COO— with n comprised between 2 and 34, and Rx and Rx′ are identical or different C2 to C12 monoalcohols.