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A kind of high temperature resistant defoamer and preparation method thereof

A defoamer and high-temperature-resistant technology, which is applied in the field of high-temperature-resistant defoamer and its preparation, can solve the problems of easy oil drift, poor stability, and easy precipitation, etc., achieve enhanced encapsulation, solve poor high-temperature stability, and operating conditions less demanding effect

Active Publication Date: 2018-09-14
佛山市南海大田化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing silicone defoamers have the following defects: silicone defoamers are prone to oil drift and precipitation under high temperature conditions, and their stability is worse than that of general polyether defoamers.

Method used

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  • A kind of high temperature resistant defoamer and preparation method thereof
  • A kind of high temperature resistant defoamer and preparation method thereof
  • A kind of high temperature resistant defoamer and preparation method thereof

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preparation example Construction

[0037] A kind of preparation method of high temperature resistant defoamer, polysiloxane silicone grease, ethoxylated acetylenic alcohol emulsifier, dispersant, thickener and water are put into the emulsification pot of formula quantity, mechanical emulsification, setting stirring speed is 800-1200r / min, stirring for 0.5-1h to obtain a high temperature resistant defoamer.

[0038] The preparation method of the high-temperature-resistant defoamer provided by the embodiment of the present invention has fewer steps, simple process, low requirements on operating conditions, and high production efficiency.

Embodiment 1

[0041] A high temperature resistant defoamer, prepared according to the following steps: 10% ethoxylated acetylenic alcohol emulsifier, 19.2% polysiloxane silicone grease, 0.8% dispersant, 2% thickener and the rest of water Put it into an emulsification pot, set the stirring speed to 1200r / min, and mechanically emulsify for 1 hour to obtain a high temperature resistant polyether modified silicone defoamer. Wherein, the models or molecular structural formulas of the above-mentioned components are shown in Table 1.

Embodiment 2

[0043] A high temperature resistant defoamer, prepared according to the following steps: 8% ethoxylated acetylenic alcohol emulsifier, 25% polysiloxane silicone grease, 1% dispersant, 3% thickener and the rest of water Put it into an emulsification pot, set the stirring speed to 800r / min, and mechanically emulsify for 1 hour to obtain a high temperature resistant polyether modified silicone defoamer. Wherein, the models or molecular structural formulas of the above-mentioned components are shown in Table 1.

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Abstract

The invention discloses a heat-resistant antifoaming agent. The heat-resistant antifoaming agent is prepared from, by weight, 8-45% of polysiloxane silicone grease, 5-20% of an ethoxyacetylene emulsifier, 0.2-5% of a dispersing agent, 1-6% of a thickening agent and the balance of water, wherein the combined weight of the components is 100%. The heat-resistant antifoaming agent can maintain the original structure at high temperature, stable in performance, free of floating oil and non-precipitating. The invention further discloses a preparation method of the heat-resistant antifoaming agent, and the method is fewer in steps, simple in process, low in operation conditions and high in production efficiency.

Description

technical field [0001] The invention relates to the technical field of defoamers, in particular to a high-temperature-resistant defoamer and a preparation method thereof. Background technique [0002] 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 industry, textile printing and dyeing industry, oil field industry, etc., it is required that the defoamer has the characteristics of high temperature resistance. [0003] However, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04
Inventor 杨丽英林超群覃月伦刘颖欣梁莉芬萧翠琴
Owner 佛山市南海大田化学有限公司
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