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Hyperbranched polyether modified polysiloxane defoamer containing nanosilicon dioxide and preparation method thereof

A nano-silica, silicone defoamer technology, applied in chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of unsatisfactory shear resistance and limited applications, and achieve excellent anti-corrosion Shear property, small size, effect of improving defoaming efficiency

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

[0024] A hyperbranched polyether modified silicone defoamer containing nano-silica, consisting of the following raw materials in parts by weight (kg): polysiloxane 35, hyperbranched polyether 22, allyl glycidyl ether 24 , propylene oxide 56, double metal cyanide complex 0.3, isopropanol 65, chloroplatinic acid catalyst 0.4, ultrafine aluminum silicate 4, sorbitol 1, Tween 60 2, sodium carboxymethylcellulose 3 , appropriate amount of deionized water, nano-silica powder 9, dodecanol 50.

[0025] Specific steps are as follows:

[0026] (1) Preparation of allyl-terminated hyperbranched polyether:

[0027] 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 oxide...

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PUM

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Abstract

The invention discloses a hyperbranched polyether modified polysiloxane defoamer containing nanosilicon dioxide. The hyperbranched polyether modified polysiloxane defoamer is prepared from, by weight, 25-40 parts of polysiloxane, 13-23 parts of hyperbranched polyether, 16-26 parts of allyl glycidyl ether, 38-58 parts of epoxypropane, 0.3-0.5 part of double metal cyanide, 50-70 parts of isopropanol, 0.2-0.5 part of a chloroplatinic acid catalyst, 2-6 parts of ultra-fine aluminum silicate, 1-2 parts of sorbitol, 1-2 parts of tween-60, 2-4 parts of sodium carboxymethylcellulose, an appropriate amount of deionized water, 4-11 parts of nanosilicon dioxide powder and 45-60 parts of dodecyl alcohol. The hyperbranched polyether containing a large number of hydroxyls at the tail end is adopted as a raw material, end-allyl hyperbranched polyether is prepared, a modified polyether end group double-bond structure and polysiloxane are adopted for performing a hydrosilylation reaction, the hyperbranched polyether modified polysiloxane is synthesized, and the defoamer prepared through the hyperbranched polyether modified polysiloxane has the excellent anti-shearing performance.

Description

technical field [0001] The invention relates to the field of chemical products, in particular to a hyperbranched polyether modified organic silicon defoamer containing nanometer silicon dioxide 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/02
CPCB01D19/0404B01D19/0409B01D19/0427
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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