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Coating defoamer

A defoaming agent and coating technology, applied in the field of coating defoaming agent, can solve the problems of excessive particle size, no defoaming activity, difficult emulsification, etc., to achieve the effect of promoting effect, improving viscosity, and good use value.

Inactive Publication Date: 2020-05-05
湖北新四海化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, organosilicon-based defoamers have attracted widespread attention due to their high defoaming efficiency, low dosage, and no physiological toxicity. However, silicones have poor dispersibility, are difficult to emulsify, and tend to condense into oversized oils that have no defoaming activity. beads, while pure silicone oil has no defoaming effect on the foam of aqueous solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of paint defoamer, in parts by mass, adopts following steps to make:

[0019] S1, mix 20 parts of polydimethylsiloxane, 8 parts of high carbon alcohol, 3 parts of fumed white carbon black, 5 parts of tributyl phosphate, 2 parts of distearamide, and 0.5 parts of potassium hydrogen persulfate Finally, stir evenly to obtain liquid A;

[0020] S2, add 3 parts of sodium hexametaphosphate, 2 parts of sorbitan fatty acid and 3 parts of carboxymethyl cellulose into 85 parts of deionized water, and stir evenly to obtain liquid B;

[0021] S3, mix liquid A and liquid B at 70°C, heat up to 100°C and stir evenly, then add 15 parts of hydrophobic silicon dioxide and keep warm for 30 minutes to prepare a paint defoamer.

Embodiment 2

[0023] A kind of paint defoamer, in parts by mass, adopts following steps to make:

[0024] S1, 30 parts of polymethyltriethoxysilane, 5 parts of higher carbon alcohol, 1 part of fumed white carbon black, 8 parts of tributyl phosphate, 0.5 parts of distearyl diethylamine, and 2 parts of potassium hydrogen persulfate After mixing, stir evenly to obtain liquid A;

[0025] S2, add 3 parts of sodium hexametaphosphate, 5 parts of polysorbate and 1.5 parts of carboxyethyl cellulose into 70 parts of deionized water, and stir evenly to prepare liquid B;

[0026] S3, Mix liquid A and liquid B at 60°C, heat up to 90°C and stir evenly, then add 30 parts of hydrophobic silicon dioxide and 3 parts of diethylene glycol laurate, and keep warm for 40 minutes to prepare a paint defoamer .

Embodiment 3

[0028] A kind of paint defoamer, in parts by mass, adopts following steps to make:

[0029] S1, mix 40 parts of polymethyltrimethoxysilane, 15 parts of higher carbon alcohol, 2 parts of fumed white carbon black, 6 parts of tributyl phosphate, 1 part of distearyl diethylamine, and 1 part of potassium hydrogen persulfate Finally, stir evenly to obtain liquid A;

[0030] S2, add 2 parts of sodium hexametaphosphate, 3 parts of fatty acid esters of glycerol and 2 parts of xanthan gum into 75 parts of deionized water, and stir evenly to prepare liquid B;

[0031] S3, mix liquid A and liquid B at 65°C, heat up to 95°C and stir evenly, then add 20 parts of hydrophobic silicon dioxide, 2 parts of diethylene glycol laurate and 2 parts of glutaraldehyde, and keep warm for 35 minutes. Prepared paint defoamer.

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PUM

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Abstract

The invention belongs to the technical field of defoamers, and particularly relates to a coating defoamer. The coating defoamer comprises the following raw materials (by weight): 20-40 parts of polysiloxane, 15-30 parts of hydrophobic silica, 5-15 parts of high alcohols, 1-3 parts of fumed silica, 5-8 parts of tributyl phosphate, 0.5-2 parts of distearoyl diethylamine, 1-3 parts of sodium hexametaphosphate, 0.5-2 parts of potassium hydrogen persulfate, 2-5 parts of a surfactant, 1.5-3 parts of a thickener, 0-3 parts of a bactericide and 70-85 parts of deionized water. The coating defoamer hasgood defoaming and foam inhibition characteristics, is stable in quality after long-term storage and use, and has a very good use value.

Description

technical field [0001] The invention belongs to the technical field of defoamers, in particular to a paint defoamer. 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. In recent years, organosilicon-ba...

Claims

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Application Information

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IPC IPC(8): C09D7/61C09D7/63C09D7/65C09D5/14
CPCC09D5/14C09D7/61C09D7/63C09D7/65
Inventor 邵玲龚家全杨帆
Owner 湖北新四海化工股份有限公司
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