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Low viscosity functional fluids

A fluid and composition technology, applied in the field of low-viscosity functional fluids, can solve the problems of unsolved brake fluids, unspecified corrosion standards, pollution, etc.

Inactive Publication Date: 2011-10-05
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they do not address the problem of brake fluid contamination by salt water, nor do they state that the disclosed fluids meet the corrosion standards of SAE J1703 / J1704 or ISO 4925 when subjected to salt water environments

Method used

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  • Low viscosity functional fluids
  • Low viscosity functional fluids
  • Low viscosity functional fluids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1 - Corrosion and Wetting of Functional Fluids with Phosphate Esters and with Phosphate Esters / Oleic Acid Combinations Slip performance

[0079] For commercially available DOT 3 brake fluid (PM6664) base fluid and containing RHODOFAC Lubricity and corrosion test data were obtained for two modified forms of the RM 510 phosphate ester fluid. In one modified form of the fluid, the phosphate ester is combined with a fatty acid (oleic acid); while in another form, no fatty acid is included. The formula is as follows:

[0080] table 3

[0081]

[0082]

[0083] In Table 3, "methoxypolyethylene glycol" ("MPG") methoxytriethylene glycol (10% by weight of MPG), methoxytetraethylene glycol (78.4% by weight of MPG), and A mixture of methoxypolyethylene glycol (10.9% by weight of MPG) of one or more repeating ethylene glycol units. The LV-RG1 and LV-RG2 formulations have the following equilibrium reflux boiling points and viscosities:

[0084] Table 4

[00...

Embodiment 2

[0092] Example 2 - Corrosion and Lubrication of Functional Fluids with Different Amounts of Phosphate Esters and No Fatty Acids performance

[0093] In this example, different amounts of RHODOFAC were added to a commercially available DOT 3 brake fluid (DBF 310 GC) and the fluid Lubricity and corrosion data were obtained for two modifications of RM-510 (dialkylphenol ethoxylated phosphate ester). The formulations are provided in Table 7:

[0094] Table 7

[0095]

[0096] In Table 7, "butoxypolyethylene glycol" ("BPG") refers to butoxytriethylene glycol (11.9% by weight of BPG), butoxytetraethylene glycol (64.2% by weight of BPG), and Mixtures of butoxypolyethylene glycol (21.9% by weight of BPG) of 5 or more repeating ethylene oxide units. "Diflash refined" refers to diethylene glycol (22.8% by weight of Diflash), triethylene glycol (58.3% by weight of Diflash), tetraethylene glycol (16.4% by weight of Diflash) and compounds with 5 or more repeats of ethylene oxide...

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Abstract

Low viscosity functional fluids are described which comprise glycols and an additive package that includes a fatty acid and a phosphate ester, such as a phosphate ester of an alkyl, alkenyl, or aryl alcohol. The fluids are particularly well-suited for use as DOT 3 or DOT 4 brake fluids and provide robust lubricity and corrosion inhibition.

Description

technical field [0001] This application claims priority to US Application Serial No. 61 / 112,466, filed November 7, 2008, which is hereby incorporated by reference for all purposes. [0002] The present disclosure relates to low viscosity functional fluids that are used in various applications, particularly as brake fluids. Background technique [0003] Newly developed devices such as electronic or automatic anti-lock braking systems, stability control systems and regenerative braking systems require high performance hydraulic fluids (eg, brake fluids) with suitable physical and performance qualities. In particular, there is a strong need for high-performance brake fluids with high lubricity to reduce or eliminate brake noise while increasing brake life by reducing corrosion. The US government has developed standards governing classification standards and certification of functional fluids used as brake fluids using a system of DOT (United States Department of Transportation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04B60T11/10
CPCC10M2209/1045C10M2207/126C10M2207/0225C10M2215/042C10M2207/127C10M2215/221C10N2230/12C10N2240/08C10M2209/107C10M169/04C10M2207/046C10M2207/0406C10N2230/06B60T11/10C10M2201/087C10M2229/02C10M2223/04C10M2207/026C10M2207/022C10M2207/04C10M2209/103C10M2209/105C10N2230/02C10M2209/1033C10M2209/104C10M2215/04C10M2215/223C10M2201/082C10N2030/02C10N2030/06C10N2030/12C10N2040/08C23F11/10C10M2209/1085C10M2209/108C10N2010/02C10N2060/14
Inventor 赵瑾
Owner DOW GLOBAL TECH LLC