| abstract |
The invention concerns demulsifiers based on polyalkyl (meth)acrylate cooligomers or copolymers CNP built up from the following components: A) 10-95 wt % (meth)acrylic acid esters of formula (I) in which R stands for hydrogen or methyl and R1 stands for an optionally branched alkyl group with 1-32 carbon atoms; B) 5-90 wt % (meth)acrylic acid esters of formula (II) in which R stands for hydrogen or methyl, A and B are selected from the group (a), (b), (c) shown, a condition being that n+m is a number between 3 and 200 and does not exceed 100 for any individual member (a), (b) or (c), and R1 stands for an optionally branched alkyl group, a cycloalkyl group, an aryl group or an alkaryl group with 1-50 carbon atoms; and C) 0-40 wt % a 1-alkene with 4-32 carbon atoms. |