Demulsifiers

US6080794A · kind A · utility

Assignee

• Roehm GmbH · DE

Inventors

• Clemens Auschra · Glückstadt, DE
• Horst Pennewiss · Darmstadt, DE
• Uwe Boehmke · Darmstadt, DE
• Michael Neusius · Darmstadt, DE

Key dates

• Filing date: Sep 25, 1998
• Grant date: Jun 27, 2000
• Expiry date: Sep 25, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G33/04
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention concerns demulsifiers and methods of demulsifying based on polyalkyl (meth)acrylated co-oligomers or copolymers, CNP, built up from the following components consisting essentially of: PA1 A) 10 to less than 60 weight % of alkyl (meth)acrylic acid esters (CH.sub.2 .dbd.C(R)C(O)OR.sub.1), wherein the alkyl group is an optionally branched alkyl group having 1 to 32 carbon atoms; PA1 B) more than 40 to 90 weight % (meth)acrylic acid esters of alkoxylated radicals (CH.sub.2 .dbd.C(R)C(O)O(R.sub.A).sub.n --(R.sub.B).sub.m --R.sub.2 ), wherein R.sub.2 has 1 to 50 carbon atoms and is an optionally branched alkyl group, a cycloalkyl group, aryl group, or an alkaryl group; R.sub.A and R.sub.B represent the alkoxylation radicals a) --CH.sub.2 --CH.sub.2 --O--, b) --CH(CH3)--CH.sub.2 --O--, or c) --CH.sub.2 --CH(CH.sub.3)--O--; with the proviso n+m is a number between 3 and 200 and any individual member a), b), or c) does not exceed 100; and PA1 C) 0 to less than 40 weight % of a 1-alkene with 4 to 32 carbon atoms, with the proviso that the components A)+B)+C) add up to 100 weight %.