Variable color antifreezing solution composition formula and production process thereof

Abstract

The invention relates to a variable color antifreezing solution composition formula and a production process thereof. According to the invention, triethanolamine, diethanolamine and monoethanolamine are adopted as the buffering agent to make the system maintain a weak alkaline system and cause no corrosion to metals, at the same time the finally added triethanolamine can passivate white oil and a metal surface contacting it to form a mineral oil protective film, and disodium edentate and butylated hydroxyanisole can effectively inhibit oxidation reaction. The invention can effectively prompt a user about the use condition of the antifreezing solution and remind the user to replace the antifreezing solution timely. The antifreezing solution system provided by the invention contains an organosilicon defoamer, only 0.01-0.1% of the defoamer can effectively inhibit the foam generation of the system, thereby effectively inhibiting a lot of air from entering an engine cooling system, and effectively inhibiting and reducing metal oxidation reaction. The formula provided by the invention does not involve fluorescein, and is safe and environment-friendly. The antifreezing solution does not contain toxic substance methanol and redundant organic solvents, and further alleviates the environmental load.

Description

technical field [0001] The invention relates to the field of chemical products, in particular to a formula of a color-changing antifreeze liquid composition and a production process thereof. Background technique [0002] Motor vehicle engine coolant (mptorvehicleenginecoolant) refers to a functional liquid that is compounded with antifreeze, corrosion inhibitor and other raw materials and used in the cooling system of a motor vehicle engine to have the functions of cooling, anticorrosion, and antifreeze. [0003] Ethylene glycol is also known as "glycol", "1,2-ethylene glycol", or EG for short. The chemical formula is (CH2OH)2, which is the simplest diol. Ethylene glycol is a colorless, odorless, sweet liquid that is toxic to animals, and the lethal dose for humans is about 1.6g / kg. Ethylene glycol is miscible with water and acetone, but less soluble in ethers. Used as solvent, antifreeze and raw material for synthetic polyester. Polyethylene glycol (PEG), a high polymer...

AI Technical Summary

Problems solved by technology

[0021] The main problems of the existing antifreeze are: the antifreeze index is not up to the standard, the pollution is relatively large, and the volatilization is too large

[0022] Because glycerol has obvious cost advantages compared with ethylene glycol and propylene glycol, glycerol is also used as a raw material for the production of antifreeze, but glycerin has strong hygroscopicity, high viscosity, poor fluidity, and poor heat exchange capacity. Under high temperature conditions, it is easy to be oxidized to produce acidic substances, which corrode metals in mechanical systems. Although antifreeze is commonly added as an antirust agent, the physical properties of the chemical reaction between acid and metal cannot be changed. Therefore, it is impossible to suppress the generation of acidic substances. When avoiding the formation of acidic substances, it is necessary to prevent and protect the engine and other mechanical systems from the corrosion of acidic substances by using the color of the indicator contained in it to prompt the replacement of the acidified antifreeze in time.

[0023] At present, fluorescein and fluorescent dyes are commonly used in antifreeze. The reason is that the early engine and machinery manufacturing technology is not up to standard, and the pipeline is prone to damage. Eliminates the need for fluorescein as a leak check indicator and gives antifreeze a metallic look

Fluorescent agent is a highly polluting substance, which is gradually being phased out in many fields. It is no longer necessary to simply pursue the metal appearance of antifreeze

[0024] According to the existing national standard, the foam requirement is ≤150ml, and the defoaming time is ≤5s, but this is only the test result under laboratory conditions. In the engine water circulation system, when the coolant is in a high temperature and flowing state, a large amount of air will enter A large amount of foam is produced, which accelerates rusting. The chemical essence of rusting is the metal oxidation reaction in which water and oxygen participate.

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