POLYURETHANE MOLDED ARTICLES WITH EXCELLENT FLEXIBILITY AT LOW TEMPERATURES Russian patent published in 2019 - IPC C08G18/79 C08G18/42 C08G18/12 C08G101/00 C08J9/04 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing polyurethane molded articles. Method of producing polyurethane molded articles is carried out so that (a) organic polyisocyanates are mixed with (b) compounds having at least two hydrogen atoms which are reactive with respect to isocyanates, including a polyester polyol, (c) a foaming agent, (d) a catalyst, (e) propylene carbonate and at least one compound selected from a group consisting of compounds of general formula (I)

formula (I),

where R is a hydrocarbon residue having from 3 to 9 carbon atoms, which is attached to oxygen through a secondary or tertiary carbon atom, and compounds of formula (II)

formula (II),

AND (f) if necessary with other auxiliaries and/or additives to obtain a reaction mixture is placed into a mold and reacted to form a polyurethane molded article, where compound e) is used in amount of 1 to 30 wt. %, based on the total weight of components b) and f) and where the weight ratio of propylene carbonate and total weight of the compound of formula (I) and the compound of formula (II) ranges from 1:0.5 to 1:5. Disclosed also is a polyurethane molded article.

EFFECT: technical result is excellent elastic properties and flexibility at low temperatures.

11 cl, 2 tbl