Cooling agent, and vehicle cooling liquid and preparation method thereof

Abstract

The invention provides a vehicle cooling liquid, which comprises: 20-40 parts by weight of 1,2-propylene glycol, 20-40 parts by weight of 1,3-propylene glycol, 5-20 parts by weight of dipropylene glycol, 3.5-20 parts by weight of an organic corrosion inhibitor, 1.1-6 parts by weight of an organic preservative, and 20-40 parts by weight of water. Compared with the cooling liquid in the prior art, the cooling liquid of the present invention uses 1,2-propylene glycol and 1,3-propylene glycol as the cooling agent according to a specific ratio so as to achieve no toxicity, environmental protection,has characteristics of good cooling effect and low freezing point, has the boiling point of more than 116 DEG C, has the freezing point of less than -60 DEG C, further has excellent anti-freezing performance, can be used in severe cold areas, high cold areas and other areas, and is especially suitable for military vehicles, wherein dipropylene glycol has good solubility so as to enhance the stability and the compatibility of the cooling liquid.

Description

technical field [0001] The invention belongs to the technical field of coolant, and in particular relates to a coolant, an automobile coolant and a preparation method thereof. Background technique [0002] Automobile coolant, also known as antifreeze, is mainly composed of three parts: coolant, additives and water. The coolant and water mainly play the role of heat transfer, and the additives mainly include buffers, corrosion inhibitors, defoamers, preservatives, scale inhibitors and dispersants, emulsifiers and colorants. The internal combustion engine in the car engine burns gasoline to generate power, and it generates a lot of heat, which needs to be transferred in time to ensure the normal operation of the engine. The excess heat in the engine is conducted through the coolant in the cooling system. Therefore, it is required that the coolant not only has a good cooling effect, is anti-boiling in summer, and anti-freezing in winter, but also has functions such as anti-cor...

AI Technical Summary

Problems solved by technology

[0003] At present, the most commonly used automotive coolants on the market have the following disadvantages: (1) Ethylene glycol is generally used as the coolant. On the one hand, the freezing point of ethylene glycol is only as low as -50°C, which cannot adapt to severe cold and high-cold regions; On the one hand, ethylene glycol has high biological toxicity, and leaked and discarded ethylene glycol-based coolants cause serious harm to the natural environment; (2) Most of the corrosion inhibitors currently used are inorganic corrosion inhibitors, such as nitrite and phosphate , silicates, amines and other compounds, on the one hand, these substances are harmful to the human body and the environment, on the other hand, these inorganic substances are unstable in the cooling liquid system, easy to agglomerate and form precipitation, and have poor anti-corrosion effect, thereby reducing the cooling system. (3) Most of the preservatives currently used are benzoic acid and its salts, carthone and parabens, which contain benzene rings or formaldehyde releasers, which can cause dermatitis and Increase the risk of cancer, harmful to the human body and the environment, and because the preservative used is a lipophilic substance, it is easy to stratify in the coolant system, causing the entire coolant system to be unstable

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