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Preparation method for alcohol-free fountain solution

A technology of alcohol dampening and preparation steps, applied in the field of printing, can solve the problems of poor stability of alcohol-free dampening solution, increased auxiliary time, and high frequency of replacing dampening solution and cleaning water hopper, and achieves good detergency and improved detergency. The effect of dispersion uniformity and adhesion enhancement

Inactive Publication Date: 2018-12-07
黄智慧
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the problem that the existing alcohol-free fountain solution is not stable, the frequency of replacing the fountain solution and cleaning the bucket is too high, and the auxiliary time is increased, a kind of alcohol-free fountain solution is provided. Preparation

Method used

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  • Preparation method for alcohol-free fountain solution

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example 1

[0020] Mix sodium dodecylbenzene sulfonate and lauryl amidopropyl betaine evenly at a mass ratio of 1:1 to obtain a mixture. At a rotational speed of 30r / min, mix NEUF-160h and D114 at a mass ratio of 1:1:5 Add it into the mixture and stir for 30 minutes to obtain a compound surfactant; mix 0.2mol / L disodium hydrogen phosphate and 0.1mol / L citric acid uniformly at a volume ratio of 10:9 to obtain a buffer solution; in parts by weight, Weigh 100 parts of deionized water, 30 parts of phosphoric acid, 20 parts of compound surfactant, 10 parts of buffer solution, 20 parts of gum arabic, and 6 parts of silica sol, first mix the buffer solution, phosphoric acid and deionized water, and stir After stirring at a speed of 60r / min until it is completely dissolved, a mixed solution A is obtained. Heat the mixed solution A to 40°C, add gum arabic and silica sol, stir at a stirring speed of 100r / min until the materials are completely dissolved and dispersed, and then cool to At room temper...

example 2

[0022] Mix sodium dodecylbenzene sulfonate and lauryl amidopropyl betaine evenly at a mass ratio of 1:1 to obtain a mixture. At a rotational speed of 40r / min, mix NEUF-160h and D114 at a mass ratio of 1:1:5 Add it into the mixture and stir for 40 minutes to obtain a compound surfactant; mix 0.2mol / L disodium hydrogen phosphate and 0.1mol / L citric acid uniformly at a volume ratio of 10:9 to obtain a buffer solution; in parts by weight, Weigh 110 parts of deionized water, 40 parts of phosphoric acid, 30 parts of compound surfactant, 13 parts of buffer solution, 24 parts of gum arabic, and 11 parts of silica sol, first mix the buffer solution, phosphoric acid and deionized water, and stir After stirring at a speed of 70r / min until it is completely dissolved, a mixed solution A is obtained. Heat the mixed solution A to 45°C, add gum arabic and silica sol, stir at a stirring speed of 125r / min until the materials are completely dissolved and dispersed, and then cool to At room tempe...

example 3

[0024] Mix sodium dodecylbenzenesulfonate and lauryl amidopropyl betaine evenly at a mass ratio of 1:1 to obtain a mixture, and mix NEUF-160h and D114 at a mass ratio of 1:1:5 at a rotational speed of 50r / min Add it into the mixture and stir for 50 minutes to obtain a compound surfactant; mix 0.2mol / L disodium hydrogen phosphate and 0.1mol / L citric acid uniformly at a volume ratio of 10:9 to obtain a buffer solution; in parts by weight, Weigh 120 parts of deionized water, 50 parts of phosphoric acid, 40 parts of compound surfactant, 16 parts of buffer solution, 28 parts of gum arabic, and 16 parts of silica sol, first mix buffer solution, phosphoric acid and deionized water, and stir Stir at a speed of 80r / min until completely dissolved to obtain a mixed solution A. Heat the mixed solution A to 50°C, add gum arabic and silica sol, stir at a stirring speed of 150r / min until the materials are completely dissolved and dispersed, then cool to At room temperature, the mixture B was...

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Abstract

The invention relates to a preparation method for an alcohol-free fountain solution, and belongs to the technical field of printing. The synergistic interaction effect of micelle forming capacity andsurface tension reduction capacity of an anionic surfactant, namely lauryl sodium sulfate and a zwitterionic surfactant, namely lauramidopropyl betaine is adopted for preparing the alcohol-free fountain solution, an anticreaming agent and an oil-water balance agent are added into a combinational surfactant, a betaine type amphoteric surfactant can be dissolved in an acid, neutral or alkaline aqueous solution, and the seepage force, the decontamination capacity, the antistatic performance and the like are better. The pH of a system of the adjusting fountain solution is 4.5-6, the disperse uniformity of the fountain solution can be improved, meanwhile, later-period mixing with printing ink is facilitated, and emulsification of the printing ink is reduced; and phosphoric acid enables acacia gum to dissolve to obtain more arabic acid to supplement for a hydrophilic glue film of an empty part of a plate face, a compact oleophobic and hydrophilic film can be formed on the surface of the fountain solution, and the adhesive force of the film and the printing plate is strengthened.

Description

technical field [0001] The invention relates to a method for preparing an alcohol-free fountain solution, which belongs to the technical field of printing. Background technique [0002] The offset printing process is mainly based on the principle of water-ink immiscibility, emulsification, wetting, and selective adsorption. The blank part is hydrophilic and ink-friendly, and the graphic part is lipophilic and water-repellent. plays a very important role. Therefore, the fountain solution should have five basic functions: First, during the printing process, the fountain solution will spread rapidly on the printing plate, forming a water film on the non-graphic part of the printing plate, and this water film can prevent the ink from flowing to the printing plate. The non-graphic part diffuses, and this layer of water film is thin and uniform. The second is that the fountain solution should maintain relative stability during printing, and the degree of emulsification of the in...

Claims

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Application Information

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IPC IPC(8): B41N3/08
Inventor 黄智慧张鑫朱华
Owner 黄智慧
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