COATING COMPOSITIONS AND COATINGS MADE THEREFROM, HAVING HIGH SCRATCH RESISTANCE COUPLED WITH GOOD ERICHSEN CUPPING TEST RESULTS AND GOOD ROCK GRINDING RESISTANCE Russian patent published in 2015 - IPC C08G18/77 C08G18/62 C09D175/04 

FIELD: chemistry.

SUBSTANCE: disclosed is a coating composition which contains (A) a hydroxyl-containing polyacrylate and/or a hydroxyl-containing polymethacrylate and (B) a compound (B) which contains isocyanate groups and has a structural unit of formula (I) and a structural formula of formula (II), wherein (i) component (A) has a glass transition temperature of -60°C to 10°C, (ii) compound (B) contains more than 10 to 90 mol. % of a structural unit of formula -NR-(X-SiR"x(OR')3-x) (I) and 10 to less than 90 mol. % of a structural unit of formula -N(X-SiR"x(OR')3-x)n(X'-SiR"y(OR')3-y)m (II), based in each case on the integrity of structural units (I) and (II), and (iii) 10 to 60 mol. % of isocyanate groups of the diisocyanate and/or polyisocyanate initial structure of compound (B) reacts to form structural units of formulae (I) and (II). The invention also discloses a multistep coating method using said composition, a multilayer colour and/or effect paint system and versions of using said composition.

EFFECT: disclosed composition can be used in multistep coating processes and enables to obtain a transparent coating layer.

22 cl, 6 tbl, 16 ex