Bifunctional cold resistance additive for fuels, and fuel...

C - Chemistry – Metallurgy – 08 – F

Patent

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C08F 8/32 (2006.01) C10L 1/14 (2006.01) C10L 1/22 (2006.01) C10L 1/236 (2006.01) C10L 1/18 (2006.01)

Patent

CA 2222301

A bifunctional anti-settling and dispersant additive for middle distillates from 150-450 ·C petroleum fractions, characterised in that it consists of at least one modified copolymer with a weight-average molecular weight of 500-5000. In a first step, a first carboxylic acid is copolymerised with an alkylated ester of a second carboxylic acid which is the same as or different from the first, and in a second step, the carboxylic groupings of the resulting copolymer are amidified at a temperature of 100-200 ·C using a polyamine of formula (II), wherein n and m are from 1 to 8, and R and R' are preferably alkyl groupings.

Additif bifonctionnel d'anti-sédimentation et de dispersion pour distillats moyens issus de coupes pétrolières de températures comprises entre 150 et 450 ~C, caractérisé en ce qu'il est constitué par au moins un copolymère modifié de masse moléculaire moyenne en poids comprise entre 500 et 5000, i) la première étape consistant à copolymériser un premier acide carboxylique avec un ester alkylé d'un deuxième acide carboxylique identique ou différent du premier, ii) la seconde étape consistant à amidifier à une température comprise entre 100 ~C et 200 ~C les groupements carboxyliques du copolymère résultant, par une polyamine de formule (II), n et m étant compris entre 1 et 8, R et R' étant des groupements de préférence alkyls.

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