Alcohol substitute in alcohol-free fountain solution and preparation method thereof

Abstract

The invention relates to a constituent of fountain solution for a lithographic printer, and particularly discloses alcohol substitute A for alcohol-free fountain solution. The alcohol substitute A comprises the following constituents in percent by weight: 5 to 15 percent of self-synthesis fluorine-containing dimeric surfactant, 20 to 30 percent of polyethylene glycol, 20 to 30 percent of N-ethyl-pyrrolidone (NEP), and the balance of water, wherein the chemical formula of the self-synthesis fluorine-containing dimeric surfactant is shown in the description, and m is any integer from 6 to 8. The alcohol substitute A is applied to the alcohol-free fountain solution, can effectively reduce the surface tension, has good wettability, has good water feeding property when being used for the existing equipment, has good compatibility with printing ink, and rapidly realizes ink-water balance. When the alcohol-free fountain solution produced by adding the alcohol substitute A into the exiting fountain solution is used for lithography, ethyl alcohol or isopropyl alcohol can be free of being added, the cost is reduced, the quality is improved, and the alcohol substitute A is safer and more environmentally friendly, and can be beneficial to green printing.

Description

technical field [0001] The invention relates to a component of a fountain solution for a lithographic printing machine, in particular to an alcohol substitute for an alcohol-free fountain solution. Background technique [0002] Now the country is implementing a green printing policy, one of which is alcohol-free dampening, and the biggest problem in realizing alcohol-free dampening is that there must be good products that can achieve the same effect as alcohol dampening. There are many non-alcoholic fountain solution technologies that still cannot achieve this effect. For example, the Chinese patent application number 200910036695.8 discloses a non-alcoholic fountain solution concentrate. This patent utilizes fatty alcohol polyoxyethylene ether, alkyl glucoside The three surfactants, sulfonylated glucosamine, are used as substitutes for alcohol, and the total addition amount is 8-32%. Increasing the addition amount can reduce the surface tension of the fountain solution, but...

AI Technical Summary

Problems solved by technology

There are many non-alcoholic fountain solution technologies that still cannot achieve this effect. For example, the Chinese patent application number 200910036695.8 discloses a non-alcoholic fountain solution concentrate. This patent utilizes fatty alcohol polyoxyethylene ether, alkyl glucoside The three surfactants, sulfonylated glucosamine, are used as substitutes for alcohol, and the total addition amount is 8-32%. Increasing the addition amount can reduce the surface tension of the fountain solution, but it will also cause excessive emulsification of the ink, which is easy Ink accumulation phenomenon occurs, and the balance of ink and ink is difficult to control

In addition, the Chinese patent application No. 200910136080.2 discloses a fountain solution and its preparation method, which is to add 0.1-10% wetting agent FY-3102 (brand name Fluorine Silicon) as a substitute for alcohol. The wetting agent has a lot of foam, so it is necessary to add a defoamer. Similarly, FY-3102 is a polyether-modified polyorganosiloxane, which is an amphiphilic macromolecule. The addition amount is slightly large, and it will also produce excessive emulsification with the ink; adding Small amount, poor wetting performance

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