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1. (WO1998051719) FLOW ENHANCER FOR PETROLEUM MIDDLE DISTILLATES

Pub. No.:    WO/1998/051719    International Application No.:    PCT/EP1998/002686
Publication Date: Fri Nov 20 00:59:59 CET 1998 International Filing Date: Fri May 08 01:59:59 CEST 1998
IPC: C08F 222/00
C08F 224/00
C10L 1/14
C10L 1/196
C10L 1/197
C10L 1/236
Applicants: BASF AKTIENGESELLSCHAFT
FAUL, Dieter
WENDEROTH, Bernd
DRALLE-VOSS, Gabriele
SCHORNICK, Gunnar
Inventors: FAUL, Dieter
WENDEROTH, Bernd
DRALLE-VOSS, Gabriele
SCHORNICK, Gunnar
Title: FLOW ENHANCER FOR PETROLEUM MIDDLE DISTILLATES
Abstract:
The invention relates to a copolymer from the monomers of constituents A to C as indicated below and optionally D, the total weight of which amounts to 100 mol %: a) 20 to 80 mol % of at least one ethylenically unsaturated dicarboxylic acid or an anhydride, ester and/or amide thereof as constituent A; b) 1 to 79 mol % of at least one diketene of general formula (I), wherein R?1 and R2¿ independently means hydrogen or C¿1-30?-alkyl as constituent B; c) 1 to 79 mol % of at least one vinyl ester, (meth)acrylic acid alkyl ester, (meth)acrylnitrile or mixtures thereof as constituent C and d) 0 to less than 0.5 mol %, or when at least 20 mol % of constituent C is provided, 0 to 20 mol % of at least one other olefinically unsaturated monomer as component D. The inventive copolymer is used as a flow enhancer in petroleum middle distillates.