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Hyperbranched polyether modified organosilicon defoaming agent containing simethicone and preparation method of hyperbranched polyether modified organosilicon defoaming agent

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 Shear performance, good spreading performance, and the effect of improving dispersion performance

Inactive Publication Date: 2017-03-15
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 simethicone, consisting of the following raw materials in parts by weight (kg): polysiloxane 36, hyperbranched polyether 19, allyl glycidyl ether 22, cyclic Propylene oxide 58, double metal cyanide complex 0.4, isopropanol 66, chloroplatinic acid catalyst 0.4, ultrafine aluminum silicate 4, sorbitol 2, Tween 60 1, sodium carboxymethylcellulose 2, de Appropriate amount of ionized water, 4 simethicone, 22 tert-butanol.

[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 oxi...

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PUM

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Abstract

The invention discloses a hyperbranched polyether modified organosilicon defoaming agent containing simethicone. The hyperbranched polyether modified organosilicon defoaming agent is prepared from, by weight, 28-40 parts of polysiloxane, 13-22 parts of hyperbranched polyether, 15-25 parts of allyl glycidyl ether, 42-62 parts of epoxypropane, 0.2-0.5 part of double-metal cyanide complex, 50-70 parts of isopropanol, 0.2-0.6 part of chloroplatinic acid catalyst, 2-6 parts of ultra-fine aluminum silicate, 1-2 parts of sorbitol, 0.8-2 parts of Tween 60, 1-3 parts of sodium carboxymethylcellulose, a proper amount of deionized water, 2-7 parts of simethicone and 20-28 parts of tertiary butanol. Hyperbranched polyether with the terminal containing a large number of hydroxyl groups is adopted as a raw material to prepare allyl-terminated hyperbranched polyether, a double-bond structure of a modified hyperbranched polyether end group is subjected to a hydrosilylation reaction with polysiloxane to synthesize hyperbranched polyether modified polysiloxane, and the prepared defoaming agent has an excellent anti-shearing performance.

Description

technical field [0001] The invention relates to the field of chemical products, in particular to a hyperbranched polyether modified silicone defoamer containing simethicone 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-openi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08G77/46
CPCB01D19/0409C08G77/46
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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