HIGHLY SCRATCH-RESISTANT AND HIGHLY ELASTIC COATING AGENTS BASED ON ALKOXYSILANE-FUNCTIONAL COMPONENTS

摘要

The invention relates to thermally curing coating agents which comprise (A) at least 50 % by weight, based on the content in nonvolatile substances in the coating agent, of (A1) 0 to 50 % by weight, based on the total of components (A1) and (A2), of a polymethacrylate copolymer which comprises more than 50 % by weight, based on the total of comonomers in copolymer (A1), of a radically polymerizable, ethylenically unsaturated compounds (a1) having at least one reactive group of formula (I)-X-SiR"x(OR')3-x (I), and (A2) 50 to 100 % by weight, based on the total of components (A1) and (A2), of an adduct from polyisocyanate and alkoxysilane, whereby (A2) contains at least one reactive group of formula (II):-NR-C(O)-N-(X-SiR"x(OR')3-x)n(X'-SiR"y(OR')3-y)m (II), (B) a catalyst for cross-linking the-Si(OR')3-x units, and (C) an aprotic solvent or a mixture of aprotic solvents.