Flow enhancer for petroleum middle distillates

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 222/00 (2006.01) C08F 224/00 (2006.01) C10L 1/14 (2006.01) C10L 1/18 (2006.01) C10L 1/196 (2006.01) C10L 1/197 (2006.01) C10L 1/22 (2006.01) C10L 1/236 (2006.01) C10L 1/24 (2006.01)

Patent

CA 2288708

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 R1 and R2 independently means hydrogen or C1-30-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.

L'invention concerne un copolymérisat issu des monomères des constituants suivants A à C et éventuellement D, dont le poids total donne 100 % en moles: a) le constituant A se compose de 20 à 80 % en moles d'au moins un acide dicarboxylique éthyléniquement insaturé ou d'un anhydride, d'un ester et/ou d'un amide de celui-ci, b) le constituant B se compose de 1 à 79 % en moles d'au moins un dicétène de la formule générale (I) dans laquelle R?1¿ et R?2¿ représentent indépendamment hydrogène ou alkyle C¿1-30?, c) le constituant C se compose de 1 à 79 % en moles d'au moins un vinylester, (méth)acrylate d'alkyle, (méth)acrylonitrile ou bien de leurs mélanges, d) le constituant D se compose de 0 à moins de 0,5 % en moles ou bien, en présence d'au moins 20 % en moles du constituant C, de 0 à 20 % en moles d'au moins un autre monomère oléfiniquement insaturé. Ce copolymérisat s'utilise comme améliorateur d'écoulement dans des distillats moyens de pétrole.

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