Als Paraffindispergatoren geeignete modifizierte Copolymerisate, ihre Herstellung und Verwendung sowie diese enthaltende Erdölmitteldestillate

摘要

The invention relates to modified copolymers suitable as paraffin dispersants obtainable by reacting a copolymer of an ethylenically unsaturated bicarboxylic acid and/or a bicarboxylic derivative and a diketen of general formula (I) in which R<1> and R<2> are mutually independently hydrogen or C1-C30 alkyl with an amine of general formula (II) in which m = 0 to 100, n = 0 to 5 and x = 0 to 5, R<3>, R<4> and R<5> are mutually independently hydrogen or a C1-C5 alkyl radical, and A is NR<6>R<7> or a C2-C30 alkoxy radical in which at least one of the substituents R<6> or R<7> is different from hydrogen and is a C1-C30 alkyl or alkenyl radical or a polyether radical (a) where R<8> and R<9> is hydrogen or C1-C5 alkyl and p = 1 to 100, with the proviso that A is NR<6>R<7> if n = 0, their production and use, and middle petroleum distillates containing these modified copolymers.