FOAMED POLYURETHANE AND METHOD OF PRODUCING FOAMED POLYURETHANE Russian patent published in 2011 - IPC C08G18/10 C08G18/28 C08G18/36 C08G18/48 C08G101/00 C08J9/228 

FIELD: chemistry.

SUBSTANCE: present invention relates to foamed polyurethane which can be used in many fields with strict environmental safety requirements, where the percentage content of renewable resources and high tear resistance are required. Foamed polyurethane is a product of reaction of at least one polyisocyanate with a polyol component, in the presence of at least one foaming agent and at least one catalyst selected from a group comprising amine catalysts and organotin catalysts, if needed, in the presence of at least one surfactant, other cross-linking agents, chain extenders, pigments, flame retardants and filling materials. The polyol component contains a polymer-polyol (PMPO) selected from a group comprising styreneacrylonitrile (SAN) polymer-polyols, PHD polymer-polyols and PIPA polymer-polyols, at least 25 wt % of the weight of the polyol component of the vegetable oil hydroxylate with functionality between 1.5 and 6 and molecular weight between 300 and 10000, and 0-3 wt % of the weight of the polyol component of a polyatomic aliphatic alcohol with functionality between 3 and 8 and molecular weight less than 350, and if needed, a polyol not based on vegetable oil. The invention also describes a method of producing the foamed polyurethane described above.

EFFECT: obtaining foamed polyurethane, having considerably improved tear resistance, breaking strength and relative elongation.

27 cl, 22 ex, 3 tbl