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A method for dispersing polysiloxane in water

A technology of polysiloxane and polyorganosiloxane, which is applied in the field of fine chemical preparations and can solve the problems of unstable storage and use of silicone emulsions

Active Publication Date: 2020-01-07
南京瑞思化学技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This patent invents a method for dispersing polysiloxane in water, which solves the problem of unstable silicone emulsion in storage and use

Method used

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  • A method for dispersing polysiloxane in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of hydrogen-containing silicone resin H-Silicone Resin (H-SR-1):

[0048] Add 125ml of concentrated hydrochloric acid and 80ml of isopropanol into a four-necked flask equipped with a stirrer, dropping funnel, and thermometer, and keep the rotation speed at 100rpm and quickly add 450g of silicon 28 and 50g of dimethyldiethoxysilane at a temperature of 40°C Hydrolyze for 60min, then add dropwise a mixed solution containing 85g hexamethyldisiloxane, 60g tetramethyldisiloxane and 20ml isopropanol within 100min, keep the original temperature for hydrolysis for 60min after the dropwise addition, and finally add to Add 200ml of toluene to the reaction bottle for extraction, heat up to reflux to obtain a silicone resin extract, let stand to separate layers, separate the lower layer of acid aqueous solution, wash the upper organic solvent with water until neutral, then dry with anhydrous calcium chloride until the solution is transparent, filter, Remove toluene by di...

Embodiment 2

[0050] Preparation of hydrogen-containing silicone resin H-Silicone Resin (H-SR-2):

[0051] Add 135ml of concentrated hydrochloric acid and 70ml of isopropanol into a four-necked flask equipped with a stirrer, dropping funnel, and thermometer, and quickly add 72g of silicon 69 and 20g of dimethyldiethoxysilane at a temperature of 45°C while maintaining a rotation speed of 500rpm Hydrolyze for 25min, then add dropwise a mixed solution containing 30g hexamethyldisiloxane, 70g tetramethyldisiloxane and 20ml isopropanol within 30min, keep the original temperature for hydrolysis for 170min after the dropwise addition, and finally add to Add 200ml of toluene to the reaction bottle for extraction, heat up to reflux to obtain a silicone resin extract, let stand to separate layers, separate the lower layer of acid aqueous solution, wash the upper organic solvent with water until neutral, then dry with anhydrous calcium chloride until the solution is transparent, filter, Remove toluene...

Embodiment 3

[0053] Preparation of hydrogen-containing silicone resin H-Silicone Resin (H-SR-3):

[0054] Add 135ml of concentrated hydrochloric acid and 60ml of isopropanol into a four-neck flask equipped with a stirrer, dropping funnel, and thermometer, keep the speed at 350rpm, quickly add 210g of silicon 40 and 50g of methylphenyldichlorosilane, and hydrolyze at a temperature of 30°C 40min, and then added dropwise a mixed solution containing 35g hexamethyldisiloxane, 90g tetramethyldisiloxane and 20ml isopropanol within 120min, after the dropwise addition, keep the original temperature for hydrolysis for 100min, and finally to the reaction Add 200ml of toluene to the bottle for extraction, heat up to reflux to obtain a silicone resin extract, let stand to separate layers, separate the lower layer of acid aqueous solution, wash the upper organic solvent with water until neutral, then dry with anhydrous calcium chloride until the solution is transparent, filter, and reduce Pressure disti...

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Abstract

The invention relates to a method for dispersing polysiloxane in water. An organosilicon polymer is dispersed in the water with the help of the action of polyether-polysiloxane copolymer and an emulsifying agent. The polyether-polysiloxane copolymer is prepared from hydrogen-containing silicon resin and allyl alcohol polyether through a reaction. An emulsion prepared by the method has better stability, and can be used for preparing a textile post-finishing agent, a fabric softener, a sweat-resistant agent, a defoaming agent, a release agent, a waterproof agent and the like.

Description

technical field [0001] The present invention relates to a kind of method of dispersing polysiloxane in water, more precisely the present invention relates to a kind of method that polysiloxane is dispersed in water and prepares O / W emulsion, and it relates to the preparation of fine chemical additive, It belongs to the field of fine chemical preparation technology. Background technique [0002] Silicone emulsions have a wide range of applications, such as textile finishing agents, softeners, antiperspirants, defoamers, mold release agents, waterproofing agents, etc. High-end products in these fields are monopolized by foreign companies. A large part of peer companies are imitating, but the performance is always worse than that of foreign countries. Therefore, they can only serve low-end systems and users, and the price can only be 1 / 3~1 / 10 of similar foreign products. There are many reasons why the performance of the emulsion cannot be fully expressed, and the poor stabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L83/04C08L83/12C08L83/10C08L83/07C08K3/36C08G77/46C08G77/44C08G77/12
CPCC08G77/12C08G77/44C08G77/46C08J3/03C08J2383/04C08J2383/07C08J2383/10C08J2383/12C08J2483/12C08K3/36
Inventor 吴飞其他发明人请求不公开姓名
Owner 南京瑞思化学技术有限公司