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

US5747616A · 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: Jun 5, 1997
• Grant date: May 5, 1998
• Expiry date: Jun 5, 2017

Classification

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

Abstract

Ethylene-based copolymers which are suitable as flow improvers for mineral oil middle distillates are composed of PA1 a) from 50 to 94% by weight of ethylene, PA1 b) from 3 to 30% by weight of one or more vinyl esters of C.sub.2 -C.sub.6 -monocarboxylic acids, PA1 c) from 3 to 20% by weight of one or more aminoalkyl acrylates of the general formula I ##STR1## where R.sup.1 is hydrogen or methyl, R.sup.2 and R.sup.3 may be 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 PA1 d) from 0 to 10% by weight of one or more monomers which are copolymerizable with the monomers a) to c), copolymers in which monomer b) is vinyl acetate and which have a number average molecular weight of from 5000 to 50,000 being excluded, or are composed of PA1 a') from 50 to 95.5% by weight of ethylene, PA1 b') from 4 to 30% by weight of one or more vinyl esters of C.sub.2 -C.sub.6 -monocarboxylic acids, PA1 c') from 0.5 to 20% by weight of one or more vinylimidazoles of the general formula II ##STR2## where R.sup.4, R.sup.5 and R.sup.6 may be identical or different and are each hydrogen or C.sub.1 -C.sub.6 -alky…