COATING COMPOSITION CONTAINING POLYSILOXANE-MODIFIED POLYURETHANE FOR SOFT STAIN-RESISTANT COATINGS Russian patent published in 2023 - IPC C09D175/06 C09D183/10 C08G18/61 C08G18/79 C08G77/445 

FIELD: coatings.

SUBSTANCE: invention relates to two-component coating compositions containing polysiloxane-modified polyurethane. A two-component coating composition is proposed containing a polysiloxane-modified polyurethane as the first component A and a hardener as the second component B, where the polysiloxane-modified polyurethane is obtained by a method including the following stages: a) the introduction of a polyol in reaction with an isocyanate-functional silane binding agent to obtain a silane-grafted polyol, b) the introduction of a silane-grafted polyol in condensation reaction with a hydroxyl-functional polysiloxane to obtain a polysiloxane-modified polyurethane, where the polysiloxane-modified polyurethane has a hydroxyl number of at least 30 mg KOH/g, and where the hardener contains at least one isocyanate, where the polyol is a polyether polyol complex having a hydroxyl number greater than 105 mg KOH/g, where isocyanate is a functional silane binding agent chosen from 3-(triethoxysilyl)propylisocyanate, 3-(trimethoxysilyl)propyl isocyanate and their mixtures, and where hydroxyl-functional polysiloxane is dihydroxy-poly(dimethylsiloxane). A coated substrate is also provided for use in consumer electronics or the automotive industry obtained by applying the proposed coating composition to a polycarbonate/acrylonitrile-butadiene-styrene substrate.

EFFECT: making a coating that provides a feeling of smoothness, stain resistance and easy cleansing.

3 cl, 1 dwg, 6 tbl, 26 ex