A kind of preparation method of safe and environment-friendly alcohol-free fountain solution

Abstract

The invention relates to a preparation method for a safe and environment-friendly alcohol-free fountain solution, and belongs to the technical field of alcohol-free fountain solutions. According to the method, albumen powder is hydrolyzed under an acidic condition to obtain amino acid, then lauric acid is reacted with thionyl chloride to generate lauroyl chloride, then the amino acid is reacted with the lauroyl chloride to prepare N-lauroyl amino acid, an amino acid surfactant has the good wettability, degradation products of the amino acid surfactant are the amino acid and fatty acid and have no influence on the environment, then the N-lauroyl amino acid is mixed with wool grease, Arabic gum and the like to obtain a fountain base solution, the Arabic gum has the good hydrophilicity and lipophilicity and can improve the stability of the fountain solution and the wettability to a printing plate, and finally the fountain base solution is mixed with citric acid and the like to obtain the fountain solution. The alcohol-free fountain solution prepared by the method has the advantages of being free of alcohol, free of volatile toxic substances, completely environment-friendly and harmless to human bodies, microbial pollution of the fountain operating solution can be controlled and prevented, metal parts can be prevented from being corroded, and the printing plate and a printing machine can be protected from being damaged by early water.

Description

Technical field [0001] The invention relates to a preparation method of a safe and environmentally friendly alcohol-free fountain solution, belonging to the technical field of alcohol-free fountain solution. Background technique [0002] Fountain solution is an indispensable chemical additive in the printing process of color printers. Its function is to form a uniform water film on the blank part of the printing plate to prevent the ink in the graphic part from infiltrating into the blank part and prevent the dirty version. At the same time, it can also replenish the hydrophilic layer lost in the printing process, and can reduce the temperature of the plate. It can be seen that the fountain solution is an extremely important type of printing material. [0003] Lithographic printing is the current mainstream technology, which uses the principle of "oil-water immiscibility" for printing, so fountain solution is an important printing material. Alcohol fountain solution has been used ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: the traditional dampening solution basically contains a large amount of ethanol or isopropanol, and a large amount of volatilization in the workshop will affect the health of workers, and cause corrosion to metal parts, and at the same time, isopropanol emissions will cause environmental pollution. The defect of adverse effects provides an amino acid surfactant in combination with polyethylene glycol to reduce surface tension, and then in combination with cetyltrimethylammonium bromide to increase wetting performance, and then in combination with lanolin and calcium gluconate Provide anti-corrosion ingredients to prepare a safe and environment-friendly alcohol-free dampening solution. The invention uses protein powder to hydrolyze under acidic conditions to obtain amino acids, then reacts lauric acid with thionyl chloride to form lauroyl chloride, and then reacts amino acids with lauroyl chloride The N-lauroyl amino acid surfactant is prepared by the Schotton-Bowman reaction. The amino acid surfactant has good wettability, and its degradation products are amino acids and fatty acids, which have no impact on the environment. It is then mixed with lanolin, gum arabic, etc. to obtain Fountain base solution, gum arabic has good hydrophilicity and lipophilicity, can improve the stability of the fountain solution, increase the wettability of the printing plate, and finally mix it with citric acid, etc., to get a safe and environmentally friendly alcohol-free dampening plate The combination of lanolin and calcium gluconate can form a layer of protective film on the metal surface to prevent corrosion. The alcohol-free fountain solution prepared by the present invention does not add alcohol substances, does not contain volatile toxic substances, is completely environmentally friendly, and is safe for the human body. Harmless, with a very strong microbial killing function, it can control and prevent microbial contamination of dampening working fluid, prevent metal parts from being corroded, and protect printing plates and printing machines from water damage in advance