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Hydrogenated linear polydiene copolymers as base stock or lubricant additives for lubricant compositions

A technology of linear copolymers and hydrogenated copolymers, applied in lubricating compositions, additives, petroleum industry, etc., can solve problems such as poor traction performance

Pending Publication Date: 2021-11-05
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another disadvantage of conventional PAMA-based lubricant additives is poor traction performance

Method used

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  • Hydrogenated linear polydiene copolymers as base stock or lubricant additives for lubricant compositions
  • Hydrogenated linear polydiene copolymers as base stock or lubricant additives for lubricant compositions
  • Hydrogenated linear polydiene copolymers as base stock or lubricant additives for lubricant compositions

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Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0148] Experimental part

[0149] Hereinafter, the present invention is illustrated in further detail with reference to Examples and Comparative Examples, without intending to limit the scope of the present invention.

[0150] abbreviation

[0151] PMMA Polyalkyl(meth)acrylate

[0152] MMA methacrylic acid C 1 - Alkyl ester = methyl methacrylate

[0153] BMA methacrylic acid C 4 - Alkyl ester = n-butyl methacrylate

[0154] LMA methacrylic acid C 12 / 14 - Alkyl ester = lauryl methacrylate

[0155] KRL Kegelrollenlager (= tapered roller bearing)

[0156] KV 40 Kinematic viscosity at 40°C measured according to ASTM D445

[0157] KV 100 Kinematic viscosity at 100°C measured according to ASTM D445

[0158] m n Number average molecular weight

[0159] m w Weight average molecular weight

[0160] NB3030 Nexbase , a Group III base oil from Neste with a KV of 3.0 cSt 100

[0161] NB3043 Nexbase , a Group III base oil from Neste with a KV of 4.3 cSt 100

[0...

Embodiment

[0175] Examples (as also shown in Table 1 below)

[0176] Examples 1 to 4 of the invention are based on monomer compositions of butadiene and isoprene.

[0177] Inventive Examples 5 and 6 are based on monomer compositions of butadiene, isoprene and methyl (meth)acrylate.

[0178] Inventive Examples 7 and 8 are based on monomer compositions of butadiene, isoprene, methyl (meth)acrylate, butyl (meth)acrylate and lauryl (meth)acrylate.

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Abstract

The present invention relates to hydrogenated linear copolymers comprising butadiene and isoprene monomer units, as well as the process for preparing these copolymers. The invention further relates to a lubricating oil composition comprising one or more hydrogenated linear copolymers according to the invention, as well as to the use of the aforementioned copolymers as a lubricant additive or a synthetic base fluid for lubricant compositions, especially in gear oils, transmission oils, hydraulic oils, engine oils, grease, marine oils or industrial lubricating oils.

Description

technical field [0001] The present invention relates to hydrogenated linear copolymers comprising butadiene and isoprene monomer units, and methods of making these copolymers. The present invention also relates to lubricating oil compositions comprising one or more hydrogenated linear copolymers according to the invention, and to the use of such copolymers as lubricant additives or synthetic base fluids for lubricant compositions, especially in gears Use in oils, transmission oils, hydraulic oils, engine oils, greases, marine oils or industrial lubricants. Background technique [0002] The invention relates to the field of lubrication. Lubricants are compositions that reduce friction between surfaces. In addition to allowing freedom of movement between two surfaces and reducing mechanical wear of the surfaces, lubricants can also inhibit corrosion of the surfaces and / or can inhibit damage to the surfaces due to heat or oxidation. Examples of lubricant compositions include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/08C08F236/06C08F220/14C08F220/18C08F8/04C10M143/12C10N30/08C10N30/02
CPCC08F236/08C08F8/04C10M143/12C10M2205/06C08F236/06C08F220/14C08F220/1804C08F220/1812C10N2030/06C10N2030/02C10M145/14C10M2209/084C10N2040/25C10N2040/04C10N2020/02C10N2020/019C10N2020/04C10M2203/1025C10M2205/0285C10N2060/02C08F236/04C08F220/18C10M169/04C10M2205/0206C08F2810/00C10M169/041C10M2203/003
Inventor E·C·施魏辛格Y·格罗-昂内布林克H·普莱奇
Owner EVONIK OPERATIONS GMBH
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