All-organic waterless engine coolant

Abstract

The invention aims at providing an all-organic waterless engine coolant with high storage alkalinity and long service life, which specifically contains the following components by weight percentage: 20-92% of propylene glycol, 0-60% of ethylene glycol, 0.6-5.5% of all-organic corrosion inhibitor, 5-20% of viscosity specific heat conditioning agents, 1.5-5.0% of potential of hydrogen (pH) conditioning agents, 0.01-0.1% of antifoaming agents and 0.001-0.01% of coloring agents. The boiling point of the all-organic waterless engine coolant reaches 180-190 DEG C, the freezing point reaches below -50 DEG C, and the all-organic waterless engine coolant is free of inorganic salt, so that defects of the traditional coolant of being low in boiling point, apt to have electrochemical corrosion and cavitation corrosion, apt to generate scale and the like are overcome, engine power is improved, noise is reduced, and fuel is saved. The all-organic waterless engine coolant has storage alkalinity larger than 25 ml and very long service life, can be used for a life time after being injected for once, does not need to be added with supplement annexing agents (SCA), and is good in market prospect.

Description

technical field [0001] The invention belongs to the technical field of cooling liquid, and in particular relates to an all-organic anhydrous engine cooling liquid. Background technique [0002] Coolant is the cooling medium of the engine circulating cooling system. It is mainly composed of antifreeze, corrosion inhibitor, defoamer, colorant, buffer, etc. The high-quality coolant has antifreeze, anti-boiling, anti-corrosion, anti-scale, etc. Function. [0003] The current mainstream coolant is ethylene glycol water-containing coolant. Due to the low volatility of ethylene glycol, low vapor pressure, moderate viscosity and small change with temperature, good heat conduction, moderate price, and good compatibility with water, The remarkable effect of lowering the freezing point makes this glycol conventional coolant widely used. [0004] With the development of the automobile industry, the engine is developing towards high load and high technology, and the working state of th...

AI Technical Summary

Problems solved by technology

[0004] With the development of the automobile industry, the engine is developing towards high load and high technology, and the working state of the cooling system directly affects the normal operation of the engine and the service life of the vehicle. Therefore, not only the coolant is required to have a lower freezing point and a higher boiling point, It should also have excellent metal corrosion inhibition, anti-cavitation, anti-scaling, and environmental friendliness, and have a long service life and other comprehensive properties. The traditional ethylene glycol water-based coolant is gradually unable to meet the requirements. It has the following unavoidable defects: the water content is greater than 30%, so the boiling point can only reach 105°C-110°C, it is easy to "boil" under heavy-duty working conditions, and a steam layer is formed on the metal surface around the cylinder , resulting in a decrease in heat transfer capacity and cavitation; water electrochemically corrodes and produces scale under the action of electrolytes, gradually eroding cylinders, water tanks and rubber parts; the service life is short, generally 2 years or 40,000 kilometers Need to be replaced, frequent replacement causes troublesome maintenance, high cost, and pollutes the environment

[0005] In recent years, many brands of anhydrous coolants have been released, but toxic inorganic salt corrosion inhibitors, such as phosphates, nitrites, nitrates, molybdates, etc., are still used to varying degrees, which is not good for environmental protection. And the corrosion inhibition life is short; the current anhydrous coolant reserve alkalinity is not high, the reserve alkalinity is an important indicator of the quality of the coolant, reflecting the buffer capacity of the coolant, that is, the ability to be neutralized by acid, the higher the reserve alkalinity , the less likely to be acidified, the longer the service life of the coolant

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