Demulsifiers

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 220/18 (2006.01) B01D 17/04 (2006.01) B01D 17/05 (2006.01) C10G 33/04 (2006.01)

Patent

CA 2244753

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.

L'invention concerne des désémulsifiants à base de co-oligomères de polyalkyle(méth)acrylate ou de copolymères CNP, comprenant: A) entre 10 et 95 % en poids d'esters d'acide (méth)acrylique de la formule (I) dans laquelle R désigne hydrogène ou méthyle et R1 désigne un reste alkyle éventuellement ramifié ayant entre 1 et 32 atomes de carbone, B) entre 5 et 90 % en poids d'esters d'acide (méth)acrylique de la formule (II) dans laquelle R' désigne hydrogène ou méthyle et où A et B sont choisis dans le groupe comprenant (a), (b), (c), sous réserve que n + m forme un nombre compris entre 3 et 200 et que la somme de n + m ne dépasse pas 100 pour chaque membre individuel du groupe (a), (b) ou (c) et R1 désigne un reste alkyle éventuellement ramifié, un reste cycloalkyle, un reste aryle ou un reste alkaryle comportant entre 1 et 50 atomes de carbone; C) entre 0 et 40 % en poids d'un 1-alcène ayant entre 4 et 32 atomes de carbone.

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