Abstract: The present invention relates to a method for producing a mixture of alkoxylated polyphenols that can be used directly for producing different polyurethane materials, in particular polyurethane foams.

Abstract: The invention relates to a NCO-terminated urethane preprolymer based on at least a polyol oligomer and a diisocyanate, wherein the polyol oligomer is polyhydroxyalkanoate-diol oligomers (oligoPHA-diol) having a hydroxyl value of more than or equal to 149 mgKOH/g, and the diisocyanate is selected from the list consisting of 1,4-butane diisocyanate (BDI), hexamethylene diisocyanate (6-HDI), dimeryl diisocyanate (DDI), pentamethylene diisocyanate (PDI), L-lysine diisocyanate (LDI), 1,7-heptamethylene diisocyanate (7-HDI), and mixtures thereof. The invention also relates to a method for preparing such a NCO-terminated urethane prepolymer and for a method for preparing polyhydroxyalkanoate-diol oligomers (oligoPHA-diol). The invention also relates to a hemostatic tissue adhesive composition and a hemostatic tissue adhesive. The invention also relates to a kit for the preparation of a hemostatic tissue adhesive.

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.