COMPOSITIONS OF POLYURETDIONE, HARDENED AT LOW TEMPERATURES Russian patent published in 2016 - IPC C09D175/04 C09D7/12 C08J7/04 C08G18/72 

FIELD: chemistry.

SUBSTANCE: invention relates to method for application of coatings, using polyuretdione-polyol compositions, which includes stage of low-temperature hardening. Liquid composition for coatings, which is hardened at 20-70°C contains: a) polyuretdione, obtained by interaction of aliphatic polyisocyanate, which contains uretdione group, with monomer polyol, b) acryl polyol and c) amine catalyst, which has structure of formula I:

where R₁ is linear or branched alkyl, preferably tert-butyl or in combination with R₄ is binding segment, selected from the group, which consists of and

R₂ is H, linear or branched alkyl, preferably methyl, dimethylamine or in combination with R₃ is binding segment, selected from the group, which consists of and

R₃ is Na, linear or branched alkyl, preferably methyl, or in combination with R₂ is binding segment, selected from the group, which consists of and

R₄ is linear or branched alkyl, preferably methyl, or in combination with R₁ is binding segment, selected from the group, which consists of and

EFFECT: obtaining novel polyuretdione-polyol compositions.

10 cl, 4 tbl