MULTICOMPONENT AQUEOUS COATING COMPOSITION AND COATED SUBSTRATE Russian patent published in 2011 - IPC C09D133/06 C08G18/44 C08G18/62 C08G18/67 

FIELD: chemistry.

SUBSTANCE: multicomponent aqueous composition contains an aqueous dispersion and a component containing a material having functional groups. The components are mixed with each other before applying the composition onto the substrate. The aqueous dispersion contains a polycarbonate-polyurethane polymer and an acrylic polyol. The aqueous dispersion also contains an organic solvent. The material having functional groups reacts with functional groups of the acrylic polyol and/or polycarbonate-polyurethane polymer. The acrylic polyol has number-average molecular weight from 500 to 4000. The polycarbonate-polyurethane polymer is obtained via a reaction between hydroxy-functional carbonate-containing material and polyisocyanate. The hydroxy-functional carbonate-containing material contains a product of reaction between carbonic acid or derivative thereof and a diol. The diol is hexane-1,6-diol.

EFFECT: composition has low content of volatile substances, as well as high water resistance and hardness.

20 cl, 3 ex, 2 tbl