PREPOLYMERS OBTAINED FROM HYDROXYMETHYL-CONTAINING POLYESTER POLYOLS DERIVED FROM FATTY ACIDS Russian patent published in 2011 - IPC C08G18/36 C08G18/42 C08G18/12 C08G63/12 C07C69/675 

FIELD: chemistry.

SUBSTANCE: present invention relates to a prepolymer containing at least one urethane group, an average of approximately 1.8-6 isocyanate groups per molecule, and having average molecular weight between 500 and 8000, as well as a polymer obtained as a result of solidification thereof. Said prepolymer contains a product of a reaction between at least one isocynate and material which reacts with isocyanate and contains at least one hydroxymethyl-containing polyester polyol. The hydroxymethyl-containing polyester polyol is obtained from reaction between an ester having a hydroxymethyl group of a fatty acid, containing 12-26 carbon atoms, and a polyol compound or a polyamine initiator having an average of at least 1 hydroxyl, primary amine- and/or secondary amine group/molecule, such that the hydroxymethyl-containing polyester polyol contains an average of at least 1.3 repeating units, obtained from an ester having a hydroxymethyl group of a fatty acid per total number of hydroxyl, primary amine and secondary amine groups in the initiator compound, and having the following structure: [H-X](_Z-P)-R-[X-Z]_p, (I).

EFFECT: obtaining a prepolymer suitable for use in producing a wide range of polymer materials, having higher hydrolytic resistance and stability, low water absorption, high resistance to acid etching, flexibility etc.

15 cl, 6 ex