Process for preparing polymers and compositions thereof

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 2/38 (2006.01) C08F 293/00 (2006.01) C10M 145/14 (2006.01)

Patent

CA 2584907

The present invention provides a process for preparing a polymer, employing the steps of: (1) contacting a free radical initiator; a chain transfer agent containing a thiocarbonyl thio group and a free radical leaving group; and a radically polymerisable monomer, to form a polymer chain; and (2) contacting the polymer chain of step (1) with at least one of a polyvalent coupling agent, a polymerisation inhibitor, a grafting acylating agent, an amine and an oil of lubricating viscosity. The invention further provides compositions and uses for the polymer.

La présente invention concerne un procédé pour préparer un polymère, comprenant les étapes consistant à : (1) mettre en contact un initiateur de radicaux libres, un agent de transfert de chaîne contenant un groupe thio thiocarbonyle et un groupe partant radical libre ; et un monomère de polymérisation radicalaire pour former une chaîne polymère ; et (2) mettre en contact la chaîne polymère de l~étape (1) avec au moins un composant parmi un agent de couplage polyvalent, un inhibiteur de polymérisation, un agent d~acylation et de greffage, une amine et une huile de viscosité lubrifiante. L~invention concerne en outre des compositions et des utilisations du polymère.

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