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Copolymer and lubricating oil composition

A technology of lubricating oil composition and copolymer, applied in lubricating composition, petroleum industry, base material, etc., can solve the problems of limited use range, low viscosity, difficult application, etc.

Inactive Publication Date: 2018-04-17
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, such a lubricating oil composition has a low viscosity compared with a conventional lubricating oil composition, so the range of its use is limited
[0006] In addition, lubricating oil compositions containing vegetable oils as base oils have problems in storage properties and stability at low temperatures
When such a lubricating oil composition contains a viscosity modifier such as an OCP (olefin copolymer)-based viscosity modifier, the viscosity modifier lacks solubility in vegetable oil, making it difficult to apply
[0007] In addition, by selecting a PMA (polymethacrylate)-based viscosity modifier as a viscosity modifier for lubricating oil compositions based on vegetable oil or synthetic ester, the solubility of the viscosity modifier in the base oil can be improved, However, since the PMA-based viscosity modifier contains 50% by mass or more of mineral oil with a low biodegradation rate as diluent oil, the biodegradation rate of the lubricating oil composition is significantly reduced.

Method used

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  • Copolymer and lubricating oil composition
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  • Copolymer and lubricating oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0204] [Example 1-1] (manufacture of copolymer B-1)

[0205] 40.0 parts by mass of ricinoleic acid, 5.8 parts by mass of sebacic acid, and 5.2 parts by mass of 1,4-butanediol were heated from normal temperature to 210° C. over 30 minutes. After reaching 210° C., 0.20 parts by mass of titanium tetrabutoxide and 0.03 parts by mass of a 20 wt % aqueous solution of ethylammonium hydroxide were added, and the mixture was kept at 210° C. for 5 hours to conduct an esterification reaction.

[0206] After completion of the esterification reaction, 1.36 parts by mass of titanium tetrabutoxide was added as a polymerization catalyst, and the pressure was reduced to 0.133 kPa (1 Torr) while raising the temperature to 230° C. over 60 minutes to perform a polycondensation reaction. This polycondensation reaction was performed while stirring the reaction mixture. Here, as the polycondensation reaction proceeds, the stirring torque required for stirring the reaction mixture gradually increase...

Embodiment 1-2

[0207] [Example 1-2] (manufacture of copolymer B-2)

[0208] 40.0 parts by mass of ricinoleic acid, 10.2 parts by mass of adipic acid, and 9.7 parts by mass of 1,4-butanediol were heated from normal temperature to 210° C. over 30 minutes. Thereafter, polyester was obtained in the same manner as in Example 1-1.

Embodiment 1-3

[0209] [Example 1-3] (manufacture of copolymer B-3)

[0210] 40.0 parts by mass of ricinoleic acid, 13.6 parts by mass of sebacic acid, and 9.7 parts by mass of 1,4-butanediol were heated from normal temperature to 210° C. over 30 minutes. Thereafter, polyester was obtained in the same manner as in Example 1-1.

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Abstract

The problem of the invention is to provide a lubricating oil composition having excellent heat resistance (suppressed discoloration upon heating) and stickiness while maintaining the excellent viscosity characteristics of lubricating oil compositions that use ricinoleic acid polymers. The invention provides: a copolymer (B) in which structural units (a) derived from ricinoleic acid, structural units (b) derived from an aliphatic dicarboxylic acid, and structural units (c) derived from a C2-10 diol are contained in a specific ratio, the copolymer (B) having a specific intrinsic viscosity; and alubricating oil composition containing a base oil and the copolymer (B), the mass ratio (mass of (A) / mass of (B)) of the base oil (A) and the copolymer (B) in the lubricating oil composition being 60 / 40-99.5 / 0.5.

Description

technical field [0001] The present invention relates to a copolymer satisfying specific requirements, a lubricating oil composition containing the copolymer in a specific amount, and uses thereof. Background technique [0002] Petroleum products generally have the so-called temperature dependence of viscosity, that is, when the temperature changes, the viscosity changes greatly. In addition, lubricating oil also has temperature dependence of viscosity, and it is preferable that the temperature dependence of viscosity is small. In order to reduce the temperature dependence of this viscosity, polymers soluble in lubricating base oils are used as viscosity index improvers. Mineral oil solutions of olefin copolymers or polymethacrylate polymers (hereinafter referred to as PMA) are known as typical viscosity modifiers. [0003] On the other hand, in recent years, due to increased awareness of global environmental issues, the development of products with reduced environmental bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/60C10M145/22C10M129/78C10M169/04C10M101/04C10M105/36C10M105/38C10N20/00C10N20/02C10N30/00C10N30/02C10N30/08C10N40/02C10N40/04C10N40/08C10N40/12C10N40/14C10N40/20C10N40/25C10N40/30C10N50/10
CPCC08G63/60C10M129/78C10M2207/2825C10M2207/2835C10M2207/301C10M2207/302C10M145/22C10M2207/401C10M2209/102C10N2030/20C10N2030/10C10N2030/02C10N2030/58C10N2030/08C10N2030/68C10N2040/04C10N2040/25C10N2040/08C10N2040/20C10N2050/10C10M105/36C10M105/38C10M105/00C10M169/041C10M2207/2845C10M2207/2855
Inventor 木田真理子江端洋树金重良辅
Owner MITSUI CHEM INC
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