FIELD: chemistry.
SUBSTANCE: present invention relates to polyalkyl(met)acrylate polymer used as an additive to lubricating compositions. Polyalkyl(met)acrylate polymer is proposed, obtained by polymerization of a monomer composition containing: (a) from 20 to 35% by weight of composite ester of (met)acrylic acid and the first hydroxylated hydrogenated polybutadiene with an average molecular weight from 1500 to 2500 g/mol; (b) from 5 to 15% by weight of composite ester of (met)acrylic acid and the second hydroxylated hydrogenated polybutadiene with an average molecular weight from 4000 to 6000 g/mol; (c) from 10 to 75% by weight of one or more C1-C30alkyl(met)acrylates; and (d) from 0 to 65% by weight of styrene monomers containing from 8 to 17 carbon atoms selected from a group, consisting of styrene and substituted styrenes having an alkyl substituent in the side chain, where the total weight of monomers (a) and (b) is at least 25%, and the total weight of monomers (a)-(d) in total is 100% by weight. A method for the production of polyalkyl(met)acrylate polymer, its use, and a lubricant composition containing polyalkyl(met)acrylate polymer are also disclosed.
EFFECT: production of polyalkyl(met)acrylate polymers that provide high viscosity index, shear resistance and solubility after shear.
10 cl, 7 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| VISCOSITY INDEX IMPROVER WITH IMPROVED SHEAR RESISTANCE | 2020 |
|
RU2804509C2 |
| POLYMER-INORGANIC COMPOSITIONS IN FORM OF NANOPARTICLES, THEIR MANUFACTURING METHOD, AND THEIR USE AS ADDITIVES FOR LUBRICATING MATERIALS | 2019 |
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| POLYMER-INORGANIC COMPOSITIONS IN THE FORM OF NANOPARTICLES, THEIR MANUFACTURING METHOD AND THEIR USE AS ADDITIVES FOR LUBRICATING MATERIALS | 2019 |
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| NEW VISCOSITY INDEX IMPROVING AGENTS HAVING CERTAIN MOLECULAR WEIGHT DISTRIBUTIONS | 2018 |
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| LUBRICATING COMPOSITION WITH IMPROVED VISCOSITY CHARACTERISTICS AT LOW OPERATING TEMPERATURE | 2017 |
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| APPLICATION OF COMB POLYMERS AS ANTI-FATIGUE ADDITIVES | 2010 |
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| POUR POINT DEPRESSANTS FOR IMPROVING LOW-TEMPERATURE VISCOSITY OF AGED LUBRICATING OIL | 2015 |
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| LUBRICATING MATERIAL WITH IMPROVED VISCOSITY INDEX AND METHOD FOR OBTAINING THEREOF | 2010 |
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RU2576401C2 |
