Hyper branched polyether-modified organosilicon antifoaming agent capable of rapidly defoaming and preparation method thereof

A technology of organosilicon defoamer and hyperbranched polyether, which is applied in chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of unsatisfactory shear resistance and limited application, and achieve excellent resistance Effect of shear performance, improvement of defoaming efficiency, and improvement of defoaming effect

Inactive Publication Date: 2017-03-08
合肥新万成环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyether modified silicone oil defoamer currently studied is not ideal in terms of shear resistance, which limits its application in some fields such as coatings, petrochemicals, and papermaking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A hyperbranched polyether modified silicone defoamer capable of rapid defoaming, consisting of the following raw materials in parts by weight (kg): polysiloxane 36, hyperbranched polyether 19, allyl glycidyl ether 22, Propylene oxide 55, double metal cyanide complex 0.4, isopropanol 60, chloroplatinic acid catalyst 0.4, ultrafine aluminum silicate 4, sorbitol 2, Tween 60 1, sodium carboxymethylcellulose 3, Appropriate amount of deionized water, sodium carbonate 1, coke 2, fluorite 2.

[0023] Specific steps are as follows:

[0024] (1) Preparation of allyl-terminated hyperbranched polyether:

[0025] Add hyperbranched polyether and double metal cyanide complex into a high-pressure reactor, vacuumize and dehydrate, and replace with nitrogen for 3 times, after heating up to 120°C, feed 2 / 3 parts of propylene oxide to control the temperature of the reaction process At about 135°C, when the pressure in the kettle drops, add allyl glycidyl ether and the remaining propylene...

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PUM

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Abstract

The invention discloses a hyper branched polyether-modified organosilicon antifoaming agent capable of rapidly defoaming. The antifoaming agent comprises the following raw materials in parts by weight: 25-40 parts of polysiloxanes, 14-22 parts of hyper branched polyether, 17-26 parts of allyl glycidyl ether, 46-60 parts of epoxypropane, 0.2-0.5 parts of a bimetallic cyanidation complex, 50-70 parts of isopropanol, 0.2-0.6 parts of a chloroplatinic acid catalyst, 3-6 parts of ultrafine alumina silicate, 1-2 parts of sorbitol, 1-2 parts of tween 60, 2-4 parts of carboxymethylcellulose sodium, a proper amount of deionized water, 0.5-1 part of sodium carbonate, 2-3 parts of coke, and 1-3 parts of fluorite. The end contains a lot of hydroxy hyper branched polyethers as a raw material, the end-allyl hyper branched polyether is prepared, a double-bond structure of the modified hyper branched polyether end group is used for performing a hydrosilylation with polysiloxanes, the hyper branched polyether-modified polysiloxanes can be synthesized, and the prepared antifoaming agent has excellent anti-shearing performance.

Description

technical field [0001] The invention relates to the field of chemicals, in particular to a hyperbranched polyether modified silicone defoamer capable of rapid defoaming and a preparation method thereof. [0002] technical background [0003] Defoamers, also known as defoamers or defoamers, will produce many foams that affect production during industrial production, and defoamers need to be added. It is widely used to remove harmful foam produced in the production process of latex, textile sizing, food fermentation, biomedicine, paint, petrochemical, papermaking, industrial cleaning, sewage treatment and other industries. [0004] The current defoamers can be divided into two categories: silicone type and polyether type according to the composition. Due to the addition of emulsifiers and other additives, silicone defoamers are prone to defects such as demulsification and oil floating at higher temperatures; Polyether-type defoamers are mostly polymers formed by ring-opening p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08G81/00
CPCB01D19/0404B01D19/0409B01D19/0413C08G81/00
Inventor 杨成勇杨云胡亚琼任意何庆海
Owner 合肥新万成环保科技有限公司
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