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A use of a polyalkylmethacrylate polymer

A technology of polyalkyl methacrylate and methacrylate, which is applied in lubricating compositions, petroleum industry, etc., can solve problems such as non-existence, achieve small viscosity changes, improve low-temperature performance, and good shear stability Effect

Inactive Publication Date: 2012-06-27
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] While most fluid or lubricant additives do not have any significant adverse effects on gassing performance, no additives known to improve gassing performance exist

Method used

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  • A use of a polyalkylmethacrylate polymer
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  • A use of a polyalkylmethacrylate polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10 and comparative Embodiment 1-3

[0188] The fluid compositions of Examples 1-10 and Comparative Examples A-C have been prepared by mixing a Group I mineral oil base stock (combination of the following: 70N mineral oil = 70SUS solvent refined Group 1 paraffinic mineral oil; 100N Mineral oil = Class 1 paraffinic mineral oil refined by 100 SUS solvent; 150N mineral oil = Class 1 paraffinic mineral oil refined by 150 SUS solvent; 600BS mineral oil = 600 SUS bright stock Class 1 mineral oil). The fluids were mixed to achieve the viscosity data mentioned in Table 3. The PAMA polymer used was VISCOPLEX 8-219 available from RohMax Oil Additives. Slightly different base oil ratios are required to achieve the same viscosity at 40 and 50°C with and without PAMA polymer. The outgassing times of these fluids have been measured according to ASTM D3427.

[0189] Outgassing test details:

[0190] Transfer a 180ml fluid sample to a clean glass tube and allow the oil to equilibrate to the desired test temperature. The test...

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Abstract

The present invention relates to the use of a polyalkylmethacrylate polymer to improve the air release of a functional fluid.

Description

technical field [0001] The present invention relates to the use of polyalkylmethacrylate polymers. Background technique [0002] Lubricants must provide sufficient viscosity at normal operating temperatures to reduce friction and wear on moving parts. If the lubricating film is too thin due to low viscosity, the components are not adequately protected and reduced operating life may result. Very low viscosity at maximum operating temperature can lead to high wear rates or equipment failure due to seizure / welding. The hydraulic fluid must provide sufficient viscosity at operating temperatures to minimize internal pump recirculation or leakage. If hydraulic fluid viscosity drops to undesirable levels, pump efficiency will drop to unacceptable levels. Poor pump efficiency results in higher than necessary energy consumption levels. [0003] In many applications, the maximum fluid viscosity is limited by the outgassing properties of the fluid or lubricant. As a fluid moves th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M145/14
CPCC10N2220/021C10M2205/0206C10N2230/00C10M2207/2835C10M2209/084C10N2230/02C10N2240/08C10M2207/2825C10M2209/1033C10M145/14C10M2223/0405C10M2203/1006C10M2223/0415C10M2205/04C10N2020/04C10N2030/00C10N2030/02C10N2040/08C08L33/08
Inventor D·G·普拉斯克C·D·内沃R·施韦德尔R·P·西姆科C·W·海因德曼
Owner EVONIK OPERATIONS GMBH
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