Additives for lubricating oils containing styrene and heavy...

Details Additives for lubricating oils containing styrene and heavy... Additives for lubricating oils containing styrene and heavy...

C - Chemistry, Metallurgy

10

M

253/115, 400/204

C10M 145/14 (2006.01) C08F 220/18 (2006.01) C10M 149/02 (2006.01)

Patent

CA 1226386

ABSTRACT OF THE DISCLOSURE The present invention relates to additives for lubricating oils, constituted by a copolymer prepared from 35-55%, and preferably 40-50%, of substituted or non-substituted styrene monomers, and from 65-45% and preferably 60-50% of heavy C12-C20 alkyl esters of methacrylic acid, said copolymer having a polydispersity which is as low as possible, a parameter of solubility close to that of the oil for which the additives are intended and a molecular weight of between 80,000 and 200,000. Preferably the heavy alkyl esters of methacrylic acid are constituted in at least 80% by C16-C20 alkyl esters. The copolymer may be modified by a comonomer and vinyl compounds. One application of the invention is the formulation of lubricating oils.

393913

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