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De-foaming agent and preparation method

A technology of defoamer and dispersant, which is applied in the field of defoamer preparation, can solve the problem of defoamer limiting defoaming ability, and achieve the effect of improving acid resistance

Inactive Publication Date: 2019-03-22
CHANGSHA XIAORU INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a defoamer and its preparation method to solve the technical problem that the defoaming ability of the existing defoamer is easily limited by the conditions of high temperature, strong acid and strong alkali

Method used

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Examples

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preparation example Construction

[0028] In an embodiment of the present invention, the preparation method of the defoamer comprises the following steps:

[0029] S1. Weigh raw materials according to the following parts by weight: polysiloxane silicone grease 8-45 parts, 2-methyl-3-butyn-2-ol 5-20 parts, dispersant 0.2-5 parts, thickener 1 -6 parts, 20-30 parts of water, 3-10 parts of polylactic acid, 3-6 parts of corn starch, 4-10 parts of polynaphthalene sulfonate, 9-15 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, acrylate 4-9 copies;

[0030] The polynaphthalene sulfonate includes one or more of polynaphthalene sulfonate sodium salt, polynaphthalene sulfonate potassium salt, and polynaphthalene sulfonate ammonium salt;

[0031] S2. Modified polysiloxane silicone grease: Mix and stir siloxane silicone grease, fatty alcohol polyoxyethylene ether ammonium sulfate, and water evenly, and react for 30-50 minutes at a temperature of 500-900°C and in a closed space. A modified substance A is obt...

Embodiment 1

[0036] A kind of antifoaming agent and preparation method, comprise the following steps:

[0037]S1. Weigh raw materials according to the following parts by weight: 45 parts of polysiloxane silicone grease, 19 parts of 2-methyl-3-butyn-2-ol, 4.5 parts of dispersant, 5 parts of thickener, 28 parts of water, 6 parts of polylactic acid, 5 parts of corn starch, 7 parts of polynaphthalene sulfonate, 14 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 8 parts of acrylate;

[0038] Described polynaphthalene sulfonate is sodium polynaphthalene sulfonate;

[0039] S2. Modified polysiloxane grease: Mix silicone grease, fatty alcohol polyoxyethylene ether ammonium sulfate, and water and stir evenly, and react for 46 minutes at a temperature of 870°C in a closed space to obtain a modified substance A, the modified substance A is the addition of fatty alcohol polyoxyethylene ether ammonium sulfate to the end group of polysiloxane silicone grease to form a new ether group;

...

Embodiment 2

[0043] A kind of antifoaming agent and preparation method, comprise the following steps:

[0044] S1. Weigh raw materials according to the following parts by weight: 11 parts of polysiloxane silicone grease, 7 parts of 2-methyl-3-butyn-2-ol, 1 part of dispersant, 2 parts of thickener, 22 parts of water, 4 parts of polylactic acid, 3 parts of corn starch, 5 parts of polynaphthalene sulfonate, 10 parts of fatty alcohol polyoxyethylene ether ammonium sulfate, 8 parts of acrylate;

[0045] Described polynaphthaldehyde sulfonate is polynaphthaldehyde ammonium sulfonate;

[0046] S2. Modified polysiloxane silicone grease: Mix silicone grease, fatty alcohol polyoxyethylene ether ammonium sulfate, and water and stir evenly, and react for 38 minutes at a temperature of 600°C in a closed space to obtain a modified substance A, the modified substance A is the addition of fatty alcohol polyoxyethylene ether ammonium sulfate to the end group of polysiloxane silicone grease to form a new e...

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Abstract

The invention discloses a de-foaming agent and a preparation method. The de-foaming agent is prepared from the following raw materials: polysiloxane silicone grease, 2-methyl-3-butyn-2-ol, a dispersant, a thickening agent, water, polylactic acid, corn starch, polynaphthalene formaldehyde sulfonate, ammonium fatty alcohol polyoxyethylene ether sulfate and acrylate. The de-foaming agent is preparedthrough the steps of modifying the polysiloxane silicone grease, modifying the 2-methyl-3-butyn-2-ol, mixing residual raw material components with the modified polysiloxane silicone grease and the modified 2-methyl-3-butyn-2-ol and emulsifying and the like. According to the de-foaming agent, a reinforcing system composed of the polynaphthalene formaldehyde sulfonate, the ammonium fatty alcohol polyoxyethylene ether sulfate and the acrylate is adopted, so that the acid resisting performance and high temperature resisting performance of the de-foaming agent are improved.

Description

technical field [0001] The invention belongs to the technical field of defoamer preparation, and in particular relates to a defoamer and a preparation method. Background technique [0002] Antifoaming agent, also known as antifoaming agent, is a food additive that reduces surface tension during food processing, inhibits foam generation or eliminates foam that has already occurred. Most defoamers are liquid compound products, which are mainly divided into three categories: silicone, polyether, and mineral oil. Silicone defoamer is a silicone grease synthesized with polysiloxane as the main component, together with emulsifiers, dispersants, thickeners, etc., and an appropriate amount of water through mechanical emulsification. Silicone defoamer is a kind of defoamer widely used at present. It has been found in practical applications that silicone defoamers have the advantages of strong defoaming ability and long antifoaming time. In many application fields, such as paper in...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0413B01D19/0422
Inventor 不公告发明人
Owner CHANGSHA XIAORU INFORMATION TECH CO LTD
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