Dispersants and dispersant viscosity index improvers from...

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 155/04 (2006.01) C10L 1/16 (2006.01) C10L 1/18 (2006.01) C10L 1/198 (2006.01) C10L 1/22 (2006.01) C10L 1/238 (2006.01) C10L 1/30 (2006.01) C10L 10/00 (2006.01) C10M 129/90 (2006.01) C10M 129/92 (2006.01) C10M 133/54 (2006.01) C10M 133/58 (2006.01)

Patent

CA 2336185

The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have been hydrogenated, functionalized, optionally modified, and post treated. The dispersant substances include a copolymer of two different conjugated dienes. The polymers are selectively hydrogentated to produce polymers which have highly controlled amounts of unsaturation, permitting highly selective functionalization. Also provided are lubricant fluids, such as mineral and synthetic oils, which have been modified in their dispersancy and/or viscometric properties by means of the dispersant substances of the invention. Also provided are methods of modifying the dispersancy and/or viscometric properties of lubricating fluids such as mineral and synthetic lubricating oils. The dispersant substances may also include a carrier fluid to provide dispersant concentrates.

La présente invention concerne des dispersants et des améliorants de l'indice de viscosité des dispersants renfermant des polymères de diènes conjugués ayant été hydrogénés, fonctionnalisés, éventuellement modifiés, et post-traités. Les substances dispersantes renferment un copolymère de deux diènes conjugués différents. Les polymères sont hydrogénés sélectivement pour produire des polymères présentant des quantités régulées d'insaturation, permettant ainsi une fonctionnalisation hautement sélective. Par ailleurs, cette invention concerne des liquides lubrifiants, tels que les huiles minérales et synthétiques, dont les propriétés dispersives et/ou viscosimétriques ont été modifiées en utilisant les substances dispersantes de cette invention. De plus, cette invention concerne des procédés de modification des propriétés dispersives et/ou viscosimétriques des liquides lubrifiants tels que les huiles minérales et synthétiques. Les substances dispersantes peuvent également renfermer un liquide porteur pour fournir des concentrés dispersants.

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