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High efficiency composite defoaming agent and preparation method thereof

A compound type, defoamer technology, applied in the direction of separation methods, chemical instruments and methods, foam dispersion/prevention, etc., can solve the problems of production capacity limitation, waste of raw materials and products, unusability, etc., to improve dispersion ability, improve Compatibility, effect of improving defoaming and antifoaming ability

Inactive Publication Date: 2017-02-15
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

[0002] In industrial production, a large amount of foam will be generated, which will bring various troubles to production and processing, such as: greatly limiting production capacity, causing waste of raw materials and products, prolonging the reaction cycle of production, affecting product quality, polluting the environment, etc. Wait
Therefore, foam must be eliminated in industrial production. The most commonly used method is to add defoamers. There are many types of defoamers. The best effect is silicone defoamer, but silicone has very strong hydrophobic properties, resulting in pure Silicone defoamers are prone to silicon spots, shrinkage cavities, agglomeration and other phenomena during use, and cannot be used in water-based ink, textile printing and dyeing, papermaking and other industries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The high-efficiency composite defoamer of the present embodiment, its raw material formula is as follows:

[0037] Polydimethylsiloxane 3kg;

[0038] Long chain alkyl modified polydimethylsiloxane 12kg;

[0039] Polyether modified polydimethylsiloxane 8kg;

[0040] 50kg of water;

[0041] Sorbitan monostearate 1kg;

[0042] Mono, diglyceride fatty acid ester 1kg;

[0043] Sorbitan fatty acid ester polyoxyethylene ether 0.5kg;

[0044] Silica 0.5kg;

[0045] Sodium carboxymethyl cellulose 0.5kg.

[0046] The preparation process is as follows:

[0047] First, long-chain alkyl-modified polydimethylsiloxane is prepared. Put the hydrogen-containing silicone oil with a hydrogen content of 0.2 and 16 olefins into the reaction kettle together, raise the temperature to 85°C, vacuumize and dehydrate for 0.4 hours, and then raise the temperature to 120°C for 2 hours to prepare the long-chain alkyl modified polymer. Dimethicone.

[0048] Next, prepare polyether-modified p...

Embodiment 2

[0053] The high-efficiency composite defoamer of the present embodiment, its raw material formula is as follows:

[0054] Polydimethylsiloxane 5kg;

[0055] Long chain alkyl modified polydimethylsiloxane 15kg;

[0056] Polyether modified polydimethylsiloxane 10kg;

[0057] 60kg of water;

[0058] Sorbitan monostearate 3kg;

[0059] Mono, diglyceride fatty acid ester 3kg;

[0060] Sorbitan fatty acid ester polyoxyethylene ether 1kg;

[0061] Silica 1kg;

[0062] Sodium Carboxymethyl Cellulose 1kg.

[0063] The preparation process is as follows:

[0064] First, long-chain alkyl-modified polydimethylsiloxane is prepared. Put the hydrogen-containing silicone oil with a hydrogen content of 0.5 and 16 olefins into the reactor together, raise the temperature to 90°C, vacuumize and dehydrate for 0.5 hours, then raise the temperature to 130°C and react for 3 hours to obtain a long-chain alkyl modified polymer. Dimethicone.

[0065] Next, prepare polyether-modified polydimethy...

Embodiment 3

[0070] The high-efficiency composite defoamer of the present embodiment, its raw material formula is as follows:

[0071] Polydimethylsiloxane 7kg;

[0072] Long chain alkyl modified polydimethylsiloxane 18kg;

[0073] Polyether modified polydimethylsiloxane 12kg;

[0074] 70kg of water;

[0075] Sorbitan monostearate 5kg;

[0076] Mono, diglyceride fatty acid ester 5kg;

[0077] Sorbitan fatty acid ester polyoxyethylene ether 1.5kg;

[0078] Silica 1.5kg;

[0079] Sodium carboxymethyl cellulose 1.5kg.

[0080] The preparation process is as follows:

[0081] First, long-chain alkyl-modified polydimethylsiloxane is prepared. Put the hydrogen-containing silicone oil with a hydrogen content of 0.8 and 16 olefins into the reactor together, raise the temperature to 95°C, vacuumize and dehydrate for 0.6 hours, and then raise the temperature to 140°C and react for 4 hours to obtain a long-chain alkyl modified polymer. Dimethicone.

[0082] Next, prepare polyether-modified p...

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PUM

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Abstract

The invention provides a high efficiency composite defoaming agent and a preparation method thereof. According to the invention, modified polysiloxane is used as the main defoaming ingredient, through introduction of a hydrophilic group to polysiloxane, the compatibility with the foaming system can be improved, and the dispersion ability of the product is enhanced, the disadvantages brought about by use of a pure organic silicon defoamer are avoided, and the defoaming and antifoaming ability of the product can be enhanced significantly.

Description

technical field [0001] The invention relates to the technical field of defoamer synthesis, in particular to a high-efficiency composite defoamer and a preparation method thereof. Background technique [0002] In industrial production, a large amount of foam will be generated, which will bring various troubles to production and processing, such as: greatly limiting production capacity, causing waste of raw materials and products, prolonging the reaction cycle of production, affecting product quality, polluting the environment, etc. Wait. Therefore, foam must be eliminated in industrial production. The most commonly used method is to add defoamers. There are many types of defoamers. The best effect is silicone defoamer, but silicone has very strong hydrophobic properties, resulting in pure Silicone defoamers are prone to silicon spots, shrinkage cavities, agglomeration and other phenomena during use, and cannot be used in water-based ink, textile printing and dyeing, papermak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0404B01D19/0495
Inventor 田坤耿学辉杨开柱
Owner 湖北新四海化工股份有限公司