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Defoaming agent composition used for lubricating oil and preparation method thereof

The technology of a defoamer and composition is applied in the field of defoamer composition for lubricating oil and its preparation, which can solve the problems that the defoamer cannot meet the requirements of lubricating oil deployment and use, and achieve good foam suppression, less dosage, Good effect of defoaming performance

Active Publication Date: 2009-12-16
锦州康泰润滑油添加剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problem that the existing defoamers cannot meet the requirements of lubricating oil deployment and use, and provide a foam that meets the requirements of high alkali value sulfonate, naphthenate, and sulfurized alkylphenate lubricating oil systems. Defoamer composition for lubricating oil with required properties and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 15 parts of C 10 Mix polyethylene and 0.8 parts of maleic acid, heat up to 150°C, add 0.1 parts of mono-tert-butyl peroxide, react for 2.5 hours, then add 84 parts of liquid dimethylsiloxane with chain number greater than 10, keep At a temperature of 150°C, add 0.1 part of mono-tert-butyl peroxide again, and react for 2.5 hours. The obtained viscous liquid is the product A of the antifoaming agent composition for lubricating oil of the present invention.

Embodiment 2

[0019] 10 parts of C 500 Mix polyethylene and 1.8 parts of maleic anhydride, heat up to 150°C, add 1 part of di-tert-butyl peroxide, react for 0.25 hours, then add 86.2 parts of methyl ethyl siloxane with chain number greater than 10, keep At a temperature of 150°C, add 1 part of di-tert-butyl peroxide again, and react for 1.25 hours. The obtained viscous liquid is product B of the antifoaming agent composition for lubricating oil of the present invention.

Embodiment 3

[0021] Will 5 parts C 400 Mix polypropylene and 0.5 parts of chloromaleic anhydride, heat up to 170°C, add 0.5 parts of benzoyl peroxide, react for 1.5 hours, then add 93 parts of liquid dimethyl siloxane with chain number greater than 10, keep At a temperature of 170° C., add 1 part of benzoyl peroxide again, react for 4 hours, and the obtained viscous liquid is the C product of the antifoaming agent composition for lubricating oil of the present invention.

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PUM

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Abstract

The invention relates to a defoaming agent composition used for lubricating oil and a preparation method thereof, solving the problem that the existing defoaming agent can not meet the allotment use requirement of the lubricating oil. The defoaming agent composition used for the lubricating oil comprises the following substances according to the mass ratio: 1 to 19 parts of alpha-alkene polymer, 0.1 to 1.9 parts of coupling agent, 76.1 to 98.8 parts of organo-siloxane and 0.1 to 3 parts of accelerator. In the preparation method, the alkene polymer and the coupling agent are mixed, the mixture is heated to 90 to 200 DEG C, one half of the accelerator is added into the mixture for reaction for 0.25 to 4 hours, then the organo-siloxane is added into the mixture, the temperature is kept at 90 to 200 DEG C, the other half of the accelerator is added into the mixture, the reaction is carried out for 0.25 to 4 hours, and the defoaming agent composition used for the lubricating oil can be obtained. The defoaming agent used for the lubricating oil has favorable foam-suppressing and defoaming properties, is suitable for industrial and civil lubricating oil, is not sensitive to various blending technologies, is highly effective in an acid medium and is especially suitable for a lubricating oil system containing sulphonate with high alkali number, naphthenate and alkyl monosulfide phenolate.

Description

technical field [0001] The invention relates to a surfactant, in particular to a defoamer composition for lubricating oil and a preparation method thereof. Background technique [0002] At present, the defoamers for industrial and civil lubricants mainly include methacrylate polymers and organosiloxanes. Under the condition of the same dosage, the defoaming efficiency of organosiloxane is much higher than that of methacrylate polymer. Organosiloxane defoamers are widely used when no air release value is required. The defoaming efficiency of organosiloxane defoamers showed a downward trend with the increase of the content of high base number sulfonate, naphthenate and sulfurized alkylphenate in some lubricating oil systems. One of the reasons is that the molecular weight distribution of alkyl chains in high-basic sulfonates, naphthenates, and sulfurized alkylphenates is too wide; the second reason is that organosiloxane defoamers are easily absorbed by high-basic sulfonates...

Claims

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Application Information

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IPC IPC(8): C10M161/00C10M143/02C10M143/04C10M143/06C10M129/34C10M139/00
Inventor 陈航帆关建平李亚楠吴亚文
Owner 锦州康泰润滑油添加剂有限公司
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