Defoaming agent for paint and ink and preparation method thereof

Abstract

The invention discloses a defoaming agent for paint and ink and a preparation method of the defoaming agent. The defoaming agent for the paint and the ink is prepared from the following raw materialsin parts by mass: 42-48 parts of silicone oil, 14 -20 parts of hydrophobic silicon dioxide, 14-18 parts of silicon paste, 10-20 parts of higher alcohol, 1-3 parts of glycerin fatty acid ester, 3-5 parts of sodium hexametaphosphate, 1-2 parts of sodium secondary alkyl sulfonate, 4-10 parts of magnesium hydroxide, 5-11 parts of dimer linoleic acid, 5-7 parts of white carbon black, 4-8 parts of whitemineral oil, 8-14 parts of a surfactant, 20-30 parts of polyethylene wax, 10-12 parts of lecithin, 7-18 parts of a thickener, 4-14 parts of a co-emulsifier, 16-20 parts of distearoyl diethylamine and90-110 parts of deionized water. The defoaming agent of the invention has the beneficial effects of good dispersibility, strong affinity, strong foam inhibition capability, fast foam inhibition speed, lasting action time, capacity of realizing difficult generation of fine pinhole foams in the paint, strong high temperature resistance and stability and good compatibility with the paint and enablesthe surface of the paint to not prone to skinning and to have gloss, and a mixed solution of the defoaming agent with the paint has no layering phenomenon .

Description

technical field [0001] The invention relates to the field of defoamers, in particular to a defoamer for coating ink and a preparation method thereof. Background technique [0002] In the fields of oil and gas extraction, pulp and paper, textile printing and dyeing, biological fermentation, sewage treatment, coating processing and construction industry, the foam generated by stirring will cause problems such as reduced production capacity, prolonged reaction cycle and waste of raw materials. Adding a defoamer can eliminate foam in a short time. Defoamers can be divided into mineral oil defoamers, polyether defoamers and silicone defoamers. Mineral oil defoamers can only be used under the conditions of small liquid shear force and moderate foaming ability of the surfactant contained, and their ability to eliminate dense foam is poor. [0003] Polyether defoamers can only play a defoaming effect when the temperature of the foaming system exceeds the cloud point temperature. ...

AI Technical Summary

Problems solved by technology

In recent years, organosilicon-based defoamers have received widespread attention due to their high defoaming efficiency, low dosage, and no physiological toxicity. However, silicones have poor dispersibility and poor affinity, resulting in small pinhole-like foams in coatings, and are resistant to high temperatures. Poor performance and stability, easy skinning and dull luster on the surface, poor compatibility with coatings, and obvious layering of the solution

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