Graft copolymers and lubricants containing such as...

Details Graft copolymers and lubricants containing such as... Graft copolymers and lubricants containing such as...

C - Chemistry, Metallurgy

08

F

253/102, 400/202

C08F 279/02 (2006.01) C08F 255/00 (2006.01) C08L 51/00 (2006.01) C10M 149/02 (2006.01) C10M 149/04 (2006.01) C10M 149/06 (2006.01) C10M 149/10 (2006.01) C10M 151/02 (2006.01)

Patent

CA 2029902

A graft polymer is prepared by grafting, onto a polymeric hydrocarbon backbone, a free-radical polymerizable vinyl nitrogen monomer, which grafting takes place in the presence of an aliphatic hydrocarbon substituted aromatic solvent capable of free-radical hydrogen atom chain transfer. The modified hydrocarbon based polymer finds utility as an additive for lubricating oils, particularly as dispersant-viscosity improvers for engine oils.

On greffe un polymère, sur un squelette d'hydrocarbure polymère, un monomère d'azote de vinyle polymérisable à radical libre, la greffe ayant lieu en présence d'un solvant aromatique à substitution d'hydrocarbure aliphatique, capable d'un transfert de chaîne d'atomes d'hydrogène à radical libre. Le polymère à base d'hydrocarbure modifié trouve une utilité en tant qu'additif pour huiles lubrifiantes, notamment en tant que dispersant et agents améliorant la viscosité pour des huiles de moteur.

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