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A use of a polyalkylmethacrylate polymer

A technology of polyalkyl methacrylate and methacrylate, used in lubricating compositions, petroleum industry, etc., can solve the problems of non-existence and inability to obtain outgassing, and achieve small viscosity changes and good shear stability. good anti-oxidative properties

Inactive Publication Date: 2008-02-20
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no improvement in outgassing properties can be obtained by using the combination according to US5,766,513
[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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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 Example AC have been prepared by mixing Class I mineral oil base materials (combination of the following substances: 70N mineral oil = 70 SUS solvent refined Class 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 oil Class 1 mineral oil). The fluids were mixed to achieve the viscosity data mentioned in Table 3. The PAMA polymer used is VISCOPLEX 8-219 available from RohMax Oil Additives. With and without PAMA polymers, slightly different base oil ratios are required to achieve the same viscosity at 40 and 50°C. The deflation time of these fluids has been measured in accordance with ASTM D 3427.

[0189] Details of the deflation test:

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

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Abstract

The present invention relates to the use of polyalkylmethacrylate polymers for improving the outgassing properties of functional fluids.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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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