Preparation method for powder defoaming agent

A technology of powder defoamer and starch, which is applied in the direction of foam dispersion/prevention, etc. It can solve the problems of poor defoaming stability, slowing down the release speed of defoaming active substances, and reducing the number of rinsing times.

Active Publication Date: 2015-09-30
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention relates to a preparation method of a powder antifoaming agent, which solves the problem of poor fluidity by directly adding a buffer solution to the carrier, and at the same time avoids long-term storage to cause the stability of the antifoaming agent to deteriorate; secondly, the gelling agent Added to the antifoaming active substance, it slows down the release rate of the antifoaming active substance, so that it has a better antifoaming effect in the later stage of washing, thereby reducing the number of rinsing

Method used

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  • Preparation method for powder defoaming agent
  • Preparation method for powder defoaming agent

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preparation example Construction

[0039] Preparation of antifoam actives

[0040] Polydimethylsiloxane with a viscosity of 800mPa·s, MQ resin (M:Q=0.66), and catalyst (mixed with KOH and methyl silicone oil) are first mixed, heated to 100°C to react, and then added with a specific surface area of ​​80m 2 / g hydrophobic silica, control the temperature of the reaction system and keep it warm at 100°C for 3h, and finally react for 1h at a vacuum degree of -0.02MPa to make the reaction more thorough, and finally cool to room temperature to obtain a dispersant with a viscosity of 50,000mPa·s foam actives.

[0041] Preparation of solid powder defoamer

Embodiment 1

[0043] Add 200g of antifoam active material with a viscosity of 1,000mPa·s, 50g of carboxymethyl cellulose and 20g of water into a mixer, mix with a disperser at 25°C, the speed is 500rpm, and the dispersion time is 10min to obtain a viscosity of 50,000mPa · s mixture M;

[0044] At room temperature, 80 g of 0.1 mol / L citric acid-sodium citrate buffer solution was added to 550 g of cornstarch, and stirred in a mixer for 5 minutes at a speed of 70 rpm to obtain intermediate N;

[0045] Add the mixture M, the intermediate N and 100 g of sodium polyacrylate into the mixer and mix with the rotation speed of the mixer at 1,000 rpm. Finally, dry the obtained powder through a drier to obtain a solid powder defoamer.

Embodiment 2

[0047] Add 50g of antifoaming active material with a viscosity of 50,000mPa·s, 10g of hydroxyethyl cellulose and 10g of water into a mixer, mix with a disperser at 100°C, the speed is 2,000rpm, and the dispersion time is 60min to obtain a viscosity of 100,000 mPa·s mixture M;

[0048] At room temperature, 60g of 0.2mol / L acetic acid-sodium acetate buffer solution was added to 850g of phosphodiester starch, and stirred in a mixer for 60min at a speed of 75rpm to obtain intermediate N;

[0049]Add the mixture M, the intermediate N and 20 g of polyacrylic acid into the mixer and mix them. The rotation speed of the mixer is 2,500 rpm. Finally, the obtained powder is dried by a dryer to obtain a solid powder defoamer.

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Abstract

The invention relates to a preparation method for a powder defoaming agent. A buffer solution is directly added into a carrier, so that the problem that fluidity is poor is solved, and meanwhile the problem that defoaming stability becomes poor after long-time storage is solved. In addition, a gelling agent is added into defoaming active matter to make the liquid defoaming active matter become pasty and swells after meeting water, so that the defoaming active matter is slowly released and has a better defoaming effect at the later period of washing, and accordingly rinsing frequency is reduced.

Description

technical field [0001] The invention relates to a method for preparing a powdery defoamer. The defoamer belongs to fine chemical preparations, so the invention belongs to the technical field of fine chemical preparations. Background technique [0002] Defoamer is a kind of fine chemical additive. Its main functions include defoaming and antifoaming. A good defoaming agent not only has excellent antifoaming performance, but also requires a good relationship with other additives. Excellent compatibility, and does not affect the stability of the foaming system. [0003] According to different active components, defoamers are mainly divided into silicone defoamers and non-silicon defoamers. The traditional anti-foaming composition of heavy-duty washing powder and laundry liquid used in drum washing machines is soap, that is, a kind of non-organic silicon, but it has certain requirements for water hardness, and its anti-foaming performance is poor. Silicone-based defoamers are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 焦迎春吴飞曹添刘杨
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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