METHOD FOR PREPARING ADDITION AGENT FOR LUBRICANT OILS Russian patent published in 2004 - IPC

Abstract RU 2233865 C1

FIELD: petroleum chemistry.

SUBSTANCE: invention relates to preparing addition agents designated for reducing solidification temperature of lubricant oils. Method involves separate esterification of methacrylic acid with fraction of linear (C₈-C₁₂)-alcohols and fraction of linear (C₁₆-C₂₀)-alcohols followed by separate radical polymerization of prepared esters. Prepared polymers are mixed in the ratio = (25-40):(60-75), respectively. Radical polymerization of esters is carried out preferably at temperature 60-100 C in the presence of dinitrile-azo-bis-isobutyric acid or benzoyl peroxide as an initiating agent and organic solvent taken in the amount 50-80% of ester loading. Invention provides the improvement of depressor properties in low concentrations.

EFFECT: improved preparing method.

2 cl, 1 tbl, 3 ex

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RU 2 233 865 C1

Authors

Zinenko S.A.

Grishina I.N.

Dates

2004-08-10—Published

2002-12-26—Filed