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Cooling fluid composition

A technology of composition and coolant, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problem of large amount of corrosion, and achieve the effects of superior stability, superior anti-corrosion performance, and superior anti-corrosion performance

Active Publication Date: 2006-11-08
SHISHIAI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, this coolant composition also has a problem that, in a test of corrosion performance of an aluminum heat transfer surface at a temperature exceeding 150° C., the amount of corrosion is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] best practice

[0033] Subsequently, the composition of the present invention will be described in further detail. The following Table 1 shows, respectively, preferred Examples 1 and 2, and an example not containing component (d) (comparative example 1), and an example containing neither component (c) nor component (d) ( Comparative Example 2) was compared with an example (Comparative Example 3) not containing any of components (a), (b), (c) and (d).

[0034] project

[0035] The pH (30%) of all examples in Table 1 is 7.8.

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PUM

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Abstract

The present invention provides a coolant composition which has a glycol as a main ingredient, is excellent in stability in a hard water, and has excellent corrosion preventing properties for aluminum and aluminum alloys, and the coolant composition is characterized by comprising: (a) 0.1-10% by weight of at least one ingredient selected from the group consisting of alkyl benzoic acids, aliphatic dicarboxylic acid or their salts; (b) 0.01-2.0% by weight of phosphate; (c) 0.01-0.5% by weight of 2-phophonobutane-1,2,4-tricarboxylic acid or its salt; and (d) 0.01-0.5% by weight of at least one ingredient selected from the group consisting of C4-C6 polymers and copolymers of unsaturated monoethylene dicarboxylic acid or their salts, polymers and copolymers of C4-C6 unsaturated monoethylene monocarboxylic acid or their salts, and copolymers of the above described C4-C6 unsaturated monoethylene dicarboxylic acid and the above described C4-C6 unsaturated monoethylene monocarboxylic acid.

Description

technical field [0001] The present invention relates to a coolant composition used as a coolant mainly for internal combustion engines and the like. In particular, the present invention relates to a coolant composition with excellent stability in hard water, and the coolant composition has excellent corrosion resistance to aluminum and aluminum alloys at high temperatures. Background technique [0002] Metals such as aluminum, aluminum alloys, cast iron, steel, brass, solder and copper are used in the cooling system of internal combustion engines. Especially in recent years, in order to reduce the weight of vehicles, a large amount of aluminum and aluminum alloys have been used as components in cooling systems. [0003] These metals are corroded when in contact with water or air. To prevent corrosion, coolant compositions for cooling systems of internal combustion engines contain metal corrosion inhibitors such as: phosphates, amine salts, borates, nitrites, silicon salts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/00C09K5/10C23F11/08
CPCC09K5/10C23F11/08
Inventor 江川浩司角英美
Owner SHISHIAI KK