FIELD: organic chemistry.
SUBSTANCE: use of styrene polymers and maleic acid dialkyl esters as additives in lubricating oil compositions to improve shift stability. Polymers contain the following structural elements: 
in which R1 and R2 are independent C10-C50 alkyl groups, the alkyl groups being branched or linear. The ratio of the content of linear alkyl groups to the content of branched alkyl groups is from 95:5 to 5:95 (% by weight:% by weight). At least 90% of the structural elements are elements a) or b) in terms of the total number of structural elements included in the polymer. Structural elements a) and b) are present in the polymer at a ratio of 80:20 to 20:80 (number:number).
EFFECT: use of polymers containing structural elements of styrene and dialkyl esters of maleic acid as additives for lubricating oil compositions to increase shift stability of the compositions.
16 cl, 4 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| USE OF POLYMER ADDITIVES FOR PARAFFIN-CONTAINING LIQUIDS | 2016 |
|
RU2717680C2 |
| LUBRICANT COMPOSITION | 2014 |
|
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| NEW ADDITIVES IMPROVING VISCOSITY INDEX | 2020 |
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|
RU2773826C2 |
| POLY(METH)ACRYLATE COPOLYMERS WITH BRANCHED C ALKYL CHAINS AND USE THEREOF IN LUBRICATING OIL COMPOSITIONS | 2017 |
|
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| POLYMER APPLICABLE AS VISCOSITY INDEX IMPROVER | 2011 |
|
RU2572620C2 |
| APPLICATION OF POLYMERS, WHICH CONTAIN ESTER GROUPS, AS ANTIFATIGUE ADDITIVES | 2008 |
|
RU2515994C2 |
| POLYALKYL(METH)ACRYLATES DESIGNED TO IMPROVE FUEL ECONOMY, DISPERSANT AND REDUCE DEPOSITS | 2020 |
|
RU2798848C2 |
| COMPOUNDED LUBRICATION OILS CONTAINING HIGH-EFFICIENCY BASE OILS OBTAINED FROM PARAFFIN HYDROCARBONS | 2001 |
|
RU2247141C2 |
