All-organic engine coolant

Abstract

The invention relates to an all-organic engine coolant, comprising the following components by parts by weight: 1000 parts of glycol, 16-20 parts of dodecanedioic acid, 5-9 parts of undecanedioic acid, 1-5 parts of benzotriazole, 3-6 parts of 2-ethylhexoic acid, 0.5-3 parts of hydroxybenzoic acid, 0.05-0.1 part of hydrolytic polymaleic anhydride and 0.1-0.3 part of antifoaming agent. The engine coolant takes all-organic compounds as raw materials, synergistic effect is good, and anti-corrosion property to multiple metals, especially aluminium, is good; hard water resistance is good; storage and use stability of coolant can be greatly improved; the service life of antifreezing solution can be effectively prolonged; and no influence to the environment is produced as nitrous, amine, phosphorus and chromium components are not contained.

Description

technical field [0001] The invention belongs to the field of engine coolant, in particular to an all-organic engine coolant. Background technique [0002] Engine coolant is commonly called antifreeze, and its additives are divided into inorganic type and organic type. At present, inorganic additives are widely used in China. Automobiles use antifreeze fluid containing such additives. After running for a period of time, the additives need to be added frequently. In addition, all-aluminum engines have already been put on the market, so the corrosion inhibition and protection of aluminum has become the focus of research at home and abroad. Traditional silicates are widely used as specific corrosion inhibitors for aluminum. However, silicate is prone to precipitation, which can block the waterway and cause the engine to overheat. Even after adding a silicate stabilizer, it is still not very ideal. On the other hand, the amine salt and nitrite contained in the engine coolant ...

AI Technical Summary

Problems solved by technology

However, silicate is prone to precipitation, which will block the waterway and cause the engine to overheat. Even after adding silicate stabilizer, it is still not very ideal.

On the other hand, the amine salt and nitrite contained in the engine coolant are easy to react to form ammonium nitrite carcinogen; inorganic phosphate has the disadvantage of easy formation of precipitation; borate has a great influence on the heat transfer corrosion of cast aluminum

Therefore, the use of phosphates, borates, amine salts, silicates and nitrites in modern automotive engine cooling systems is strictly limited, that is, inorganic coolants can no longer meet the demand

Images