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Polysiloxane microemulsion, and preparation method and application thereof

A polysiloxane and microemulsion technology, applied in the field of polysiloxane microemulsion and its preparation, can solve the problems of easy gel generation, low monomer content, high emulsifier content, etc., and achieve good hydrophobic effect

Inactive Publication Date: 2014-04-30
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low monomer content and high emulsifier content of the microemulsion, and the poor stability to the electrolyte, it is easy to produce gel, and the application of the silicone microemulsion is limited.

Method used

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  • Polysiloxane microemulsion, and preparation method and application thereof
  • Polysiloxane microemulsion, and preparation method and application thereof
  • Polysiloxane microemulsion, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: the preparation of the polysiloxane microemulsion of resistance to electrolyte, high solid content

[0051] (1) Add 1g of octadecyltrimethylammonium chloride and 1g of isomeric tridecyl alcohol polyoxyethylene ether into a 500mL glass cup, dissolve it in 70g of water, and add 10g of octamethylcyclotetrasilicon after fully dissolved Oxane (D 4 ), stirred to make it evenly mixed, and then sheared at a high speed (5000 rpm) in a shear emulsification mixer for 10 minutes, transferred the resulting mixture to a high-pressure homogenizer, and homogenized once under a homogenizing pressure of 30MPa. An organosiloxane monomer pre-emulsion is formed.

[0052] (2) Pour the organosiloxane monomer pre-emulsion obtained by high-pressure homogenization into a 500mL four-neck flask, add 2g of sodium sulfate, heat to 80°C, continue stirring at 500 rpm for 10min, then add 5g of 10wt% hydroxide Potassium solution, reacted for 2 hours, then added 35g D dropwise 4 , the dr...

Embodiment 2

[0054] Embodiment 2: the preparation of the polysiloxane microemulsion of resistance to electrolyte, high solid content

[0055] (1) Add 6g of octadecyltrimethylammonium chloride and 2g of isomeric tridecyl alcohol polyoxyethylene ether into a 500mL glass cup, dissolve it in 80g of water, and add 25g of octamethylcyclotetrasilicon after fully dissolved Oxane (D 4 ), stirred to make it evenly mixed, and then sheared at a high speed (5000 rpm) in a shear emulsification mixer for 10 minutes, transferred the resulting mixture to a high-pressure homogenizer, and homogenized once under a homogenizing pressure of 40MPa, An organosiloxane monomer pre-emulsion is formed.

[0056] (2) Pour the organosiloxane monomer pre-emulsion obtained by high-pressure homogenization into a 500mL four-necked flask, add 3g of sodium phosphate, heat to 70°C, continue stirring at 700 rpm for 10min, and then add 15g of 10wt% hydroxide Potassium solution, reacted for 2 hours, then added 30g D dropwise 4...

Embodiment 3

[0058] Embodiment 3: the preparation of the polysiloxane microemulsion of resistance to electrolyte, high solid content

[0059] (1) Add 5g cetyltrimethylammonium chloride and 3g OFX-0193 silicone oil, dissolved in 100g water, after fully dissolved, add 30g octamethylcyclotetrasiloxane (D 4 ), stirred to make it evenly mixed, and then sheared at a high speed (5000 rpm) in a shear emulsification mixer for 10 minutes, transferred the resulting mixture to a high-pressure homogenizer, and homogenized once under a homogenizing pressure of 50MPa. An organosiloxane monomer pre-emulsion is formed.

[0060] (2) Pour the organosiloxane monomer pre-emulsion obtained by high-pressure homogenization into a 500mL four-necked flask, add 4g of sodium citrate, heat to 80°C, continue stirring at 500 rpm for 10min, and then add 10g of 10wt% hydrogen Potassium oxide solution, reacted for 2 hours, then added 40g D dropwise 4 , the dropping time continued for 2 hours, and then reacted for 6 hou...

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Abstract

The invention belongs to the field of polysiloxane microemulsion, and discloses an electrolyte-resistant and high-solid content polysiloxane microemulsion, and a preparation method and application thereof. The preparation method comprises the following steps of dissolving a composite surfactant in water, adding a part of organic siloxane monomers, and performing shearing emulsification and high-pressure homogenization to obtain siloxane monomer pre-emulsion; adding electrolyte, performing heating and stirring, and adding a catalyst for thermostatic reaction; adding dropwise the residual siloxane monomers, continuing reaction, cooling a reaction product to room temperature, and neutralizing the reaction product to be neutral to obtain the polysiloxane microemulsion. According to the polysiloxane microemulsion, and the preparation method and application thereof, the compound surfactant is used, so that the using amount of an emulsifier is reduced, the stability of an emulsion system is improved, the conversion rate of the emulsion system is increased, and the solid content is increased; the polysiloxane microemulsion has the characteristics of high hydrophobicity, low-temperature resistance, high-temperature resistance, water resistance, electrolyte resistance and alkali resistance, is free of a metal catalyst, and can be widely applied to the fields of textile, leather, cosmetics, medicines, buildings and the like.

Description

technical field [0001] The invention belongs to the field of polysiloxane emulsions, in particular to an electrolyte-resistant polysiloxane microemulsion with high solid content and a preparation method and application thereof. Background technique [0002] The main chain of polysiloxane is composed of -Si-O- bonds, and other bonds of silicon atoms are connected with various other organic groups. Therefore, polysiloxane contains both organic groups and inorganic structures. This special The unique composition and molecular structure make it integrate the characteristics of organic and inorganic substances, showing strong hydrophobicity, good softness, low surface tension, low glass transition temperature, excellent air permeability, moisture resistance, mold release Resistance, high and low temperature resistance, aging resistance, and physiological inertia. As one of the most important products of polysiloxane, polysiloxane emulsion is composed of polysiloxane, water and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/16C08G77/20C08G77/06
Inventor 沈敏敏孙淳宁翟俊菱王俊凤
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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