Low molecular weight acrylate resins containing hydroxyl and tertiary amino groups

Claim 1

A composition comprising a compound which contains or is capable of forming more than one isocyanate group and; as a crosslinking component a reaction product of an acrylate resin containing glycidyl groups and a secondary mono-amine containing hydroxyl groups, obtained by reaction of said acrylate resin of copolymerised, statistically distributed units of (A) 3 to 30% by weight of the glycidyl ester of acrylic acid or methacrylic acid or of vinyl glycidyl ether, or any mixture thereof; (B) 0 to 20% by weight of a hydroxyalkyl ester of acrylic acid or methacrylic acid containing from 2 to 4 carbon atoms in the hydroxyalkyl radical, or any mixture thereof; (C) 5 to 80% by weight of styrene, α-methyl styrene, o-chlorostyrene, p-chlorostyrene o-, m- or p-methyl styrene, p-tert.-butyl styrene, methyl methacrylate, acrylonitrile or methacrylonitrile, or any mixture thereof; (D) 5 to 70% by weight of an acrylic acid ester containing from 1 to 12 carbon atoms in the alcohol radical or of a methacrylic acid ester containing from 2 to 12 carbon atoms in the alcohol radical, or any mixture thereof; and (E) 0 to 10% by weight of an α,β-mono-olefinically unsaturated monocarboxylic or dicarboxylic acid containing from 3 to 5 carbon atoms or of a maleic acid mono-ester containing from 2 to 14 carbon atoms in the alcohol radical, or any mixture thereof, with at least one amine containing hydroxyl groups corresponding to the formula: ##STR7## in which n=1 to 4, R=a single bond or an alkylene group containing from 1 to 4 carbon atoms, R'=alkyl containing from 1 to 4 carbon atoms, R"=alkyl containing from 1 to 4 carbon atoms or ##STR8## or in which R and R' together with ##STR9## represent an alicyclic 5- or 6-membered ring ##STR10## or R' and R" together with ##STR11## represent a pyrrolidine or piperidine ring, at a temperature of from 50° to 200° C. in such a ratio that one epoxide equivalent of the acrylate resin has been reacted with from 0.7 to 1 NH equivalent of the amine containing hydroxyl groups with the OH function remaining largely intact.