Phosphorus-free multi-effective antifreeze solution

An antifreeze, mass percentage technology, applied in the direction of heat exchange materials, chemical instruments and methods, to achieve the effect of durable metal corrosion and good addition effect

Inactive Publication Date: 2010-11-24
张家港迪克汽车化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem of metal corrosion resistance and can provide longer-lasting protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare the stock solution of 1000kg antifreeze:

[0030] Put 900kg of ethylene glycol into the reaction kettle, start stirring, then add 5kg of benzotriazole, 7.2kg of sodium nitrate, 4kg of sodium molybdate, stir and dissolve for 15 minutes, then add 25kg of sebacic acid, undecyl binary Acid 10kg, then adjust PH=8.4 with alkali under stirring, then add 1kg of hydrolyzed polymaleic anhydride, mix 8g of defoamer and 66g of dye with the remaining water and add to the reaction kettle together, finally forming a light green The transparent solution can be dispensed after being filtered through a 0.5-1μm filter after passing the inspection.

Embodiment 2

[0032] Prepare 1000kg direct-use antifreeze at -25°C:

[0033] Put 400kg of ethylene glycol into the reaction kettle, start stirring, pour in 500kg of deionized water, then add 2.5kg of phenylacryltriazole, 3.6kg of sodium nitrate, and 1.8kg of sodium molybdate, stir and dissolve for 15 minutes, then add 13kg of sebacic acid, 6kg of undecanedibasic acid, and then adjust the pH to 8.0 with alkali under stirring, then add 0.5kg of hydrolyzed polymaleic anhydride, mix 4g of defoamer and 32g of dye with the remaining water The reaction kettle finally forms a light green transparent solution, which can be dispensed after being filtered through a 0.5-1μm filter after passing the inspection.

Embodiment 3

[0035] Prepare 1000kg direct-use antifreeze at -45°C:

[0036] Put 590kg of ethylene glycol into the reaction kettle, start stirring, pour in 300kg of deionized water, then add 3kg of phenylacryltriazole, 4kg of sodium nitrate, and 2.1kg of sodium molybdate, stir and dissolve for 15 minutes, then add sunflower Acid 15kg, undecane dibasic acid 6kg, then adjust PH=8.1 with alkali under stirring, then add 0.6kg of hydrolyzed polymaleic anhydride, mix 5g of defoamer and 40g of dye with the remaining water and add to the reaction kettle , and finally formed a light green transparent solution, which can be dispensed after being filtered through a 0.5-1 μm filter after passing the inspection.

[0037] The non-phosphorus multi-effect antifreeze can be adjusted into direct-use antifreeze with different freezing points by adding deionized water as required, and can be directly loaded and used in the whole vehicle.

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PUM

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Abstract

The invention discloses a phosphorus-free multi-effective antifreeze solution, comprising the following components by mass percent: 35-90% of ethylene glycol, 0.05-1% of sodium molybdate, 0.4-2.5% of sodium nitrate, 0.3-0.9% of benzotriazole, 0.5-3.6% of sebacic acid, 0.25-3% of undecanedioic acid, 0.05-0.5% of hydrolyzed polymaleic anhydride, 0.001-0.005% of antifoaming agent and the balance deionized water. The invention has the advantages that a phosphate radical free formula system is adopted; in the formula, the sodium molybdate and the organic acid cooperate to protect the metal, and the sodium nitrate is used to assist to provide durable metal corrosion for a long-term; and a great amount of sebacic acid is used in the formula so as to take good addition effect on the corrosion of the metal.

Description

technical field [0001] The invention relates to an antifreeze system for all-round multi-layer protection of an automobile cooling system, in particular to a phosphorus-free multi-effect antifreeze. Background technique [0002] Antifreeze is a liquid with a low freezing point. The aqueous solution containing a certain amount of ethylene glycol will not freeze at low temperatures. It has good fluidity and can take away a large amount of heat generated by the engine during operation. It can be used all year round. Used in automobile antifreeze water cooling system, it has the advantages of anti-boiling, anti-corrosion, anti-scaling, anti-freezing, and anti-evaporation loss. [0003] According to the evaluation of the impact on the environment, the types of antifreeze can be divided into environmentally friendly pure organic acid antifreeze and low-grade inorganic salt antifreeze. Pure organic acid antifreeze is environmentally friendly and easy to biodegrade, but the cost of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/20
Inventor 陶佃彬施丽丽邹密陈洁曹云龙童秀凤李娟陈明娟闵海琴
Owner 张家港迪克汽车化学品有限公司
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