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A technology of antifreeze coolant and propylene glycol, applied in the field of anhydrous 1, can solve the problems of prone to electrochemistry, corrosion, etc., achieve excellent low temperature performance, and eliminate the effect of lining pitting corrosion
Active Publication Date: 2012-10-17
张家港迪克汽车化学品有限公司
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[0004] And for researching 1,2-propanediol type antifreeze coolant, its application of research is not only limited to direct use type antifreeze coolant, direct use type propylene glycol antifreeze coolant has natural environmen...
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Embodiment 1
[0026] Prepare 1000kg of a long-term car antifreeze used in areas where the lowest temperature is lower than -50°C:
[0027] Put 800kg of 1,2-propanediol into the reaction kettle, keep the temperature in the kettle not exceeding 80°C, then add 1.5kg of benzotriazole, stir and dissolve for 10 minutes, add 10kg of sebacic acid, 5kg of succinic acid, add 1 kg of hydrolyzed polymaleic anhydride, 4.5 g of defoaming agent, 32 g of acid green dye, and 15 g of tartrazine were mixed evenly, and then the remaining propylene glycol was added to the reaction kettle, and a light green transparent solution was finally formed after stirring for 4 hours. After passing through the filter of 0.5 ~ 1μm, it can be packaged.
[0028] The specific parameters of the glassware corrosion test are as follows:
[0029]
[0030]
Embodiment 2
[0032] Prepare 1000kg of antifreeze coolant for high-power heavy-duty construction machinery:
[0033] Put 800kg of 1,2-propanediol into the reaction kettle, keep the temperature in the kettle not exceeding 80°C, then add 3kg of benzotriazole, stir and dissolve for 10 minutes, add 18kg of sebacic acid, 9kg of succinic acid, add hydrolysis 1.4kg of polymaleic anhydride, 4.5g of defoaming agent, 32g of acid green dye, and 15g of tartrazine were mixed evenly, and then the remaining propylene glycol was added to the reaction kettle, and a light green transparent solution was finally formed after stirring for 5 hours. After passing through the filter of 0.5 ~ 1μm, it can be packaged.
[0034] The specific parameters of the glassware corrosion test are as follows:
[0035]
[0036] Note: the test conditions detected in the above-mentioned Example 1 and Example 2 are more severe, and the test conditions of 336h 33% volume specified in the standard are changed to the more stringen...
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Abstract
The invention discloses a 1,2-propanediol antifreezing cooling liquid which comprises the following components in percentage by mass: 0.5-3.0% of decanedioic acid, 0.25-1.5% of succinic acid, 0.1-0.9% of benzotriazole, 0.05-0.3% of hydroxypropyl methacrylate, 0.0004-0.005% of defoaming agent and the balance of 1,2-propanediol. The 1,2-propanediol antifreezing cooling liquid composite formula system disclosed by the invention has the characteristics of no water, persistent effect, environmental protection and durable corrosion resistance; the antifreezing agent is the non-toxic 1,2-propanediol capable of being naturally degraded; the formula technology mainly uses the organic acids; the 1,2-propanediol antifreezing cooling liquid can provide long-acting protection for the cooling system, and implement temperature rise of the antifreezing cooling liquid without pressurized conditions; and the 1,2-propanediol antifreezing cooling liquid can almost completely eliminate liner pitting corrosion, aluminum pump cavitation corrosion and other technical problems when being used in heavy-load engines, and can widely use automobiles, ships, large-size cooling towers, solar energy and the like as the heat-conducting media of the cooling system.
Description
technical field [0001] The invention relates to an anhydrous 1,2-propanediol antifreeze cooling liquid for comprehensive protection of automobile cooling systems, in particular to an anhydrous 1,2-propanediol organic acid antifreeze cooling liquid. Background technique [0002] Antifreeze coolant is a liquid with a low freezing point. The aqueous solution containing a certain amount of 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 cooling systems such as automobiles, ships, and large cooling towers, it has the advantages of anti-boiling, anti-corrosion, anti-fouling, anti-freezing, and anti-evaporation loss. [0003] The varieties of antifreeze coolant can be divided into environmentally friendly organic acid antifreeze coolant and low-grade inorganic salt antifreeze coolant according to the evaluation of environmental impact. Low-grade...
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