Modified copolymers suitable as parafin dispersants, their...

C - Chemistry – Metallurgy – 08 – F

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C08F 8/32 (2006.01) C08F 222/00 (2006.01) C08F 224/00 (2006.01) C10L 1/14 (2006.01) C10L 1/22 (2006.01) C10L 1/236 (2006.01) C10L 1/238 (2006.01) C10L 1/16 (2006.01) C10L 1/18 (2006.01)

Patent

CA 2186288

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 R1 and R2 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, R3, R4 and R5 are mutually independently hydrogen or a C1-C5 alkyl radical, and A is NR6R7 or a C2-C30 alkoxy radical in which at least one of the substituents R6 or R7 is different from hydrogen and is a C1-C30 alkyl or alkenyl radical or a polyether radical (a) where R8 and R9 is hydrogen or C1-C5 alkyl and p = 1 to 100, with the proviso that A is NR6R7 if n = 0, their production and use, and middle petroleum distillates containing these modified copolymers.

L'invention concerne des copolymères modifiés s'utilisant comme dispersants de paraffine, obtenus par réaction d'un copolymère, issu d'un acide dicarboxylique insaturé éthyléniquement et/ou d'un dérivé d'acide dicarboxylique, avec un dicétène de la formule générale (I), dans laquelle R?1¿ et R?2¿ désignent, indépendamment l'un de l'autre, hydrogène ou alkyle C¿1?-C¿30?, avec une amine de la formule générale (II) dans laquelle m peut valoir entre 0 et 100, n entre 0 et 5 et x entre 0 et 5, A désigne NR?6¿R?7¿ ou un reste alcoxy C¿2?-C¿30?, au moins un des substituants R?6¿ ou R?7¿ étant différant d'hydrogène et désignant un reste alkyle C¿1?-C¿30? ou un reste alcényle ou un reste polyéther (a) où R?8¿, R?9¿ désignent hydrogène ou alkyle C¿1?-C¿5? et p désigne 1 à 100, sous réserve que si n = 0, A désigne NR?6¿R?7¿. L'invention concerne leur préparation et leur utilisation, ainsi que des distillats moyens de pétrole qui contiennent lesdits copolymères modifiés.

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