Ethylene-based copolymers and their use as flow improvers in mineral oil middle distillates

US5684108A · kind A · utility

Assignee

• BASF SE

Inventors

• Hans-Joachim Muller · Remscheid, DE
• Bernd Wenderoth · Lampertheim, DE
• Albin Berger · Bobenheim am Berg, DE
• Dieter Littmann · Heßheim, DE
• Roger Klimesch · Ransbach-Baumbach, DE
• Knut Oppenlander · Ludwigshafen, DE
• Bernd Lothar Marczinke · Frankfurt, DE
• Thomas Ruhl · Bischofswerda, DE
• Marc Heider · Neustadt, DE

Key dates

• Filing date: Apr 2, 1996
• Grant date: Nov 4, 1997
• Expiry date: Apr 2, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L1/2368
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An ethylene-based copolymer which is suitable as a flow improver for mineral oil middle distillates and is composed of PA0 a) from 50 to 94% by weight of ethylene; PA0 b) from 3 to 30% by weight of one or more vinyl esters of C.sub.2 -C.sub.6 -monocarboxylic acids; PA0 c) from 3 to 20% by weight of one or more aminoalkyl acrylates of the formula I ##STR1## which R.sup.1 is hydrogen or methyl, R.sup.2 and R.sup.3 are identical or different and are each hydrogen or C.sub.1 -C.sub.6 -alkyl and A.sup.1 is straight-chain or branched C.sub.2 -C.sub.10 -alkylene; and PA0 d) from 0 to 10% by weight of one or more monomers which are copolymerizable with the monomers a) to c), wherein copolymers containing vinyl acetate as monomer b) and having a number average molecular weight of from 5,000 to 50,000 are excluded from the scope of the copolymer.