Ashless dispersants, their preparation, and their use

Details Ashless dispersants, their preparation, and their use Ashless dispersants, their preparation, and their use

C - Chemistry, Metallurgy

07

D

C07D 207/412 (2006.01) C07C 55/02 (2006.01) C07C 215/50 (2006.01) C07C 233/46 (2006.01) C07C 279/12 (2006.01) C07D 307/60 (2006.01) C08F 8/32 (2006.01) C08F 8/46 (2006.01) C08F 210/06 (2006.01) C10L 1/14 (2006.01) C10L 1/198 (2006.01) C10L 1/22 (2006.01) C10L 1/238 (2006.01) C10M 133/52 (2006.01) C10M 133/56 (2006.01) C10M 133/58 (2006.01) C10M 159/16 (2006.01) C10L 1/18 (2006.01) C10L 1/24 (2006.01) C10L 1/30 (2006.01)

Patent

CA 2162695

Ashless dispersants are formed using copolymers of propylene characterized in that they are liquid substantially linear polymers, they have stereo-irregularity in the polymer chain, at least 60 mol percent of the polymer has a terminal vinylidene group and, the polymer contains up to 25 mol percent of a C4 to C10 monoolefin polymerized into the polymer chains.

Des dispersants sans cendre sont formés au moyen de copolymères de propylène caractérisés en ce que ce sont des polymères liquides sensiblement linéaires, ils présentent une stéréo-irrégularité dans la chaîne polymérique, au moins 60 % en moles du polymère possèdent un groupe vinylidène terminal, et le polymère contient jusqu'à 25 % en moles d'une mono-oléfine C4 à C10 polymérisée dans les chaînes polymériques.

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