Hydrolytically stable viscosity index improves

a technology of oleaginous fluid and viscosity index, which is applied in the direction of liquid carbonaceous fuels, lubricant compositions, fuels, etc., can solve the problems of imposing severe demands on hydraulic fluids, water or moisture ingress to the system can have a serious effect on the performance of hydraulic fluids, and hydraulic fluids containing acrylic acid ester copolymers have a tendency to form acids, so as to improve hydrolytic stability
US20060252660A1Inactive Publication Date: 2006-11-09DUGGAL AKHILESH +3
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
DUGGAL AKHILESH
Publication Date
2006-11-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

An acrylic acid ester polymer having improved characteristics and oleaginous compositions containing the acrylic acid ester polymer. The acrylic acid ester polymer includes a copolymer derived from a first acrylic acid ester monomer having from about 1 to about 4 carbon atoms, a second acrylic acid ester monomer having from about 12 to about 14 carbon atoms, and a third acrylic acid ester monomer having from about 16 to about 20 carbon atoms. The copolymer has a weight average molecular weight ranging from about 20,000 to about 100,000 daltons and contains no more than about 1 weight percent unreacted monomer.
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Description

FIELD OF THE DISCLOSURE

[0001] The disclosure is directed to hydrolytically stable oleaginous fluids and improved additives for oleaginous fluids, particularly certain poly(alkyl (meth)acrylates) useful as additives for hydraulic fluids. BACKGROUND AND SUMMARY

[0002] Hydraulic systems, e.g., systems wherein the operation of high speed, high pressure hydraulic pumps is subject to wide temperature variations, can impose severe demands on hydraulic fluids. Under such severe operating conditions, water or moisture ingress to the system can have a serious effect on the performance of the hydraulic fluid if reactive acidic components are present in the fluid.

[0003] Additives for improving properties of hydraulic fluids such as viscosity index improving additives are known. Viscosity index improving additives reduce the influence of temperature changes on fluid viscosity. Of the viscosity index improving additives, acrylic acid ester copolymers are particularly suitable for such applicati...

Claims

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