Centre National De La Recherche Scientifique

UniversitÉde Strasbourg

Tereos Starch & Sweeteners Belgium

Société Soprema Sas

Soprema

Alexandru Sarbu

Pierre Furtwengler

Luc Avérous

Andreas Redl

Pierre Etienne Bindschedler

Remi Perrin

Stephanie Laurichesse

Andréas Redl

Pierre Etienne Bindschendler

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&#x2032; 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&#x2032; are diesters of formula &#x2014;OOC&#x2014;Cn-COO&#x2014; in which n is between 2 and 34, and Rx and Rx&#x2032; are identical or different C2 to C12 monoalcohols.

Rigid foam with improved insulating power

A polyester polyol of formula produced by a first polycondensation (a) of a sugar alcohol Z in C3 to C8 and two diacids Y and Y' which are the same or different in C4 to C36, and a second polycondensation (b) of the product produced in (a) with two diols X and X&#x2032; which are the same or different in C2 to C12, the polymer including such a polyester polyol. Also, a method for producing the polyester polyols and the use thereof in foams, adhesives, coatings or elastomers of polyurethane or polyisocyanurate.

Method for producing polyester polyols and use thereof in polyurethane

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&#x2032;.

Rigid foam comprising a polyester polyol

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Strasbourg, France

Alexandru Sarbu