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Polyether modified organosiloxane emulsion type defoaming agent and preparation method thereof

An emulsion-type defoamer and organosiloxane technology, which is applied in the field of silicone defoamers, can solve the problems of not being able to simultaneously satisfy the rapid defoaming performance and long-term antifoaming performance of the product itself, so as to improve the stability of the emulsion properties, improve the dispersion of emulsion, and promote the effect of defoaming performance

Pending Publication Date: 2022-03-18
杭州撒拉弗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing defoaming emulsion cannot satisfy the rapid defoaming performance, long-term foam suppression performance and product self-stability at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example relates to a polyether-modified organosiloxane emulsion defoamer, which consists of the following components in parts by weight: 45 parts of polyether-modified organosiloxane, 8 parts of polysiloxane, 12 parts of compound emulsifier, 1 part of thickener, 0.8 parts of stabilizer, 9 parts of nano-dispersant and 80 parts of water;

[0033] Its preparation method specifically comprises the following steps:

[0034] S1. Weigh each raw material according to the parts by weight;

[0035] S2. Add the polyether-modified organosiloxane, the polysiloxane, the nano-dispersant and the thickener into the reaction kettle, raise the temperature of the reaction system to 120-150°C, and stir for reaction 3 -5h, natural cooling, let stand for 60min;

[0036] S3. Heat up the mixture obtained in S2 to 60-70°C again, add the complex emulsifier, stir evenly, react for 20-30min, add the deionized water and the stabilizer, continue stirring for 10-20min, and cool naturally , pre...

Embodiment 2

[0052] This example relates to a polyether-modified organosiloxane emulsion type defoamer. The terminal polypropylene oxide prepolymer has a weight average molecular weight of 12,000.

Embodiment 3

[0054] This example relates to a polyether-modified organosiloxane emulsion-type defoamer, the preparation method of which is the same as Example 1, the difference is that the nano-dispersant is modified on both sides of the amino group and phenyl group described in step (3). Silica nanosheets.

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PUM

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Abstract

The invention provides a polyether modified organosiloxane emulsion type defoaming agent, which belongs to the field of organic silicon defoaming agents and comprises the following components in parts by weight: 30 to 50 parts of polyether modified organosiloxane, 6 to 18 parts of polysiloxane, 10 to 20 parts of compound emulsifier, 1 to 4 parts of thickener, 0.1 to 3 parts of stabilizer, 8 to 14 parts of nano dispersant and 60 to 80 parts of water. The nano dispersant is a modified silicon dioxide nanosheet; the polysiloxane is compounded on the basis of polyether modified organosiloxane, the influence of polyether modification on the defoaming and foam inhibition performance of the defoaming agent is further reduced, the emulsion stability is improved by compounding the emulsifier, and the dispersity and the defoaming performance are further improved by adding the nano dispersant.

Description

technical field [0001] The invention relates to the field of organosilicon defoamers, in particular to a polyether modified organosiloxane emulsion type defoamer and a preparation method thereof. Background technique [0002] Foam is a common phenomenon in daily production and life, such as printing and dyeing, fermentation, papermaking, paint, medicine, water treatment, oil field mining and other production processes, foam will occur. If not effectively controlled, foam will cause overflow, pollute the environment, Problems such as wasting raw materials and reducing production efficiency have brought a lot of unnecessary troubles to production and life. At present, foam control methods are mainly divided into mechanical defoaming method and chemical addition method, among which chemical addition method is widely used due to its low cost and high foam control efficiency. [0003] According to different active substances that exert foam control ability, foam control agents c...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0409Y02P20/10
Inventor 门全陈万钧计洪波
Owner 杭州撒拉弗科技有限公司
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