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NOVEL FLUORINATED POLYACRYLATES ANTIFOAMS IN ULTRA-LOW VISCOSITY (<5 CST) finished fluids

A technology of acrylate and ethyl acrylate, which is used in the field of defoamer component compounds, 2,2,3,-hexafluoroisopropyl methacrylate

Active Publication Date: 2020-12-18
THE LUBRIZOL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although such silicone-based antifoams are effective in suppressing foam in freshly prepared fluids, the material is prone to depreciation at elevated depolymerization at temperature, which promotes foaming

Method used

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  • NOVEL FLUORINATED POLYACRYLATES ANTIFOAMS IN ULTRA-LOW VISCOSITY (&lt;5 CST) finished fluids
  • NOVEL FLUORINATED POLYACRYLATES ANTIFOAMS IN ULTRA-LOW VISCOSITY (&lt;5 CST) finished fluids
  • NOVEL FLUORINATED POLYACRYLATES ANTIFOAMS IN ULTRA-LOW VISCOSITY (&lt;5 CST) finished fluids

Examples

Experimental program
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example

[0427] The following examples provide illustrations of the disclosed technology. These examples are non-exhaustive and are not intended to limit the scope of the disclosed technology.

[0428] The copolymer defoamer component of the present invention can be prepared by methods generally known in the art. The polymerization may be effected in bulk, in emulsion or in solution in the presence of free-radical liberators as catalysts and in the presence or absence of known polymerization regulators and / or solvents. The solvent can be aliphatic (such as heptane) or aromatic (such as xylene or toluene). In another embodiment, the antifoam agent can be polymerized in hydrocarbon oil. In yet other embodiments, the antifoaming agent can be polymerized in light aromatic petroleum naphtha, heavy aromatic naphtha, or combinations thereof. In one embodiment, the defoamers of the present invention can be polymerized in the presence of toluene.

[0429] Comparative composition 1 (85:15 EH...

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Abstract

There is disclosed an antifoam component for a mechanical device which includes a poly(acrylate) copolymer. The antifoam component has improved foam performance in finished fluids utilizing dibutyl hydrogen phosphite compounds, such as driveline fluids. A lubricating composition comprising a) at least one oil of lubricating viscosity; and b) an antifoam component comprising a poly(acrylate) copolymer. The poly(acrylate) copolymer, b) may include (i) from about 30 wt% up to about 99 wt% of a (meth)acrylate monomer having C1 to C4 alkyl esters of (meth)acrylic acid; and (ii) from about 1 wt% upto about 70 wt% of a fluorinated (meth)acrylate monomer.

Description

Background technique [0001] The disclosed technology relates to compounds useful as antifoam component in lubricant compositions. In particular, lubricating compositions and concentrates comprising the antifoam component and uses thereof are disclosed. [0002] It is known to introduce antifoam agents into hydrocarbon oil formulations used in machinery to reduce the hydrocarbon oil's tendency to foam. Silicone-based defoamers comprising polydimethylsiloxane as a main ingredient belong to the class of the most widely used defoamers that can be used as foam breakers or foam suppressors. Although such silicone-based antifoams are effective in suppressing foam in freshly prepared fluids, the material is prone to depreciation at elevated Depolymerization at temperature, thus promoting foaming. [0003] Another source of silicon contamination may be form-in-place (FIP) gaskets. Benefits for manufacturers using silicone form-in-place liquid gaskets include: ideal for sealing larg...

Claims

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Application Information

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IPC IPC(8): C10M147/04C10M169/04
CPCC10M147/04C10M169/041C10M2209/084C10M2223/049C10M2229/02C10N2020/04C10N2020/02C10N2030/06C10N2030/02C10N2030/18C10N2040/04C10N2040/25C10N2040/08C10M2213/04
Inventor S·佩雷拉K·J·休斯E·A·席费尔D·M·尼克森A·史密斯
Owner THE LUBRIZOL CORP