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High-temperature-resistant and alkali-resistant hyperbranched polyether modified organic silicon defoamer and preparation method thereof

A technology of silicone defoamer and hyperbranched polyether, which is applied in chemical instruments and methods, separation methods, foam dispersion/prevention, etc., can solve the problems of limited application and unsatisfactory shear resistance, and achieve stable performance Good, good defoaming performance and stability, good effect of chemical stability

Inactive Publication Date: 2017-02-15
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

[0023] A high-temperature and alkali-resistant hyperbranched polyether modified silicone defoamer, which consists of the following raw materials in parts by weight (kg): polysiloxane 36, hyperbranched polyether 21, allyl glycidyl ether 23, Propylene oxide 55, double metal cyanide complex 0.4, isopropanol 65, chloroplatinic acid catalyst 0.4, ultrafine aluminum silicate 4, sorbitol 2, Tween 60 1, sodium carboxymethylcellulose 3, Appropriate amount of deionized water, wollastonite 3, nano silicon oxide 2, sodium p-styrene sulfonate 4.

[0024] Specific steps are as follows:

[0025] (1) Preparation of allyl-terminated hyperbranched polyether:

[0026] 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...

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Abstract

The invention discloses a high-temperature-resistant and alkali-resistant hyperbranched polyether modified organic silicon defoamer. The defoamer is prepared from raw materials in parts by weight as follows: 25-40 parts of polysiloxane, 16-24 parts of hyperbranched polyether, 17-25 parts of allyl glycidyl ether, 42-57 parts of propylene oxide, 0.3-0.5 parts of a bimetal cyanided complex, 50-70 parts of isopropyl alcohol, 0.2-0.6 parts of a chloroplatinic acid catalyst, 3-6 parts of superfine aluminum silicate, 1-2 parts of sorbitol, 1-2 parts of Tween 60, 2-4 parts of sodium carboxymethyl cellulose, a proper amount of deionized water, 1-3 parts of wollastonite, 2-3 parts of nano silicon oxide and 3-5 parts of sodium p-styrene sulfonate. Hyperbranched polyether containing a lot of hydroxyl groups at tail ends is used as the raw material, allyl-terminated hyperbranched polyether is prepared, a modified hyperbranched polyether-terminated double bond structure and polysiloxane are subjected to a hydrosilylation reaction, hyperbranched polyether modified polysiloxane is synthesized, and the defoamer prepared from the hyperbranched polyether modified polysiloxane has excellent shear resistance.

Description

technical field [0001] The invention relates to the field of chemical products, in particular to a high-temperature and alkali-resistant hyperbranched polyether modified silicone defoamer 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 forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04C08G81/00
CPCB01D19/0409B01D19/0454C08G81/00
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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