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.

Abstract: 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? 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.

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?.

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.

Abstract: A process for producing a five-membered polycycloaliphatic carbonate including a step of reacting a suspension of a powdered sugar alcohol within a carbon dioxide source and a catalyst compound which is soluble in the carbon dioxide source at the reactional temperature. The invention also concerns a process for producing non-isocyanate polyurethane and/or a polycarbonate and/or polyethers including the step of obtaining a five-membered polycycloaliphatic carbonate according to the process for producing a five-membered polycycloaliphatic carbonate.

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?.

Abstract: A flexible or semi-flexible foam, or a composition making it possible to obtain a flexible or semi-flexible foam, including a polyester polyol or a polymer comprising a polyester polyol. The polyester polyol is obtained by a first polycondensation (a) of an alcohol sugar Z in C3 to C8 and of two identical or different diacids Y and Y? in C4 to C36 and a second polycondensation (b) of the product obtained in (a) with two identical or different diols X and X? in C2 to C12.

Abstract: 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? 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.

Abstract: Disclosed is a method for manufacturing an isocyanurate polyurethane-modified foam, called “PUIR,” including: a) providing an oil or oil mixture at least 50% by weight of the fatty acids having a carbon chain of C18 or more, the fatty acids having an overall iodine number Iiodine of at least 100 g of I2/100 g; b) epoxidating at least 50% of the double bonds in the oil to form the corresponding epoxides; and c) directly reacting, in situ, the epoxides that are obtained above with isocyanate or diisocyanate groups for obtaining corresponding oxazolidone derivatives, without passing through the intermediate formation of polyols obtained from epoxides, in the presence of at least one suitable catalyst and at least one expanding agent, so as to obtain the isocyanurate polyurethane-modified foam “PUIR.” Also disclosed are products, such as rigid insulation material, in particular as a material or panels of rigid insulation for roofing.