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Film-forming polysiloxane emulsion and preparation method thereof

A technology of polysiloxane emulsion and polysiloxane, which is applied in the direction of coating, etc., can solve the problems of tin compound toxicity, etc., and achieve the effects of high conversion rate, improved use safety, and fewer steps

Inactive Publication Date: 2013-05-22
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, current industry avoids the use of tin compounds due to their toxicity

Method used

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  • Film-forming polysiloxane emulsion and preparation method thereof
  • Film-forming polysiloxane emulsion and preparation method thereof
  • Film-forming polysiloxane emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Add 3.4g of octadecyltrimethylammonium chloride and 6.2g of isomeric tridecyl alcohol polyoxyethylene ether (the number of moles of added ethylene oxide = 7) into a 500mL glass, and use 109g of water Dissolve, after fully dissolved, add 57.4g octamethylcyclotetrasiloxane (D4), stir to make it evenly mixed, and then shear at high speed (5000 rpm) in a shear emulsification mixer for 10 minutes to form silicone Oxane monomer pre-emulsion: transfer the organosilicon monomer pre-emulsion to a high-pressure homogenizer, and homogenize for 1 minute under a homogeneous pressure of 30Mpa to form an organosiloxane monomer emulsion.

[0044] (2) Heat the organosiloxane monomer emulsion to 80°C, add 10g of 10wt% potassium hydroxide solution, react for 6 hours, cool to 40°C, add 1.2g of octadecyltrimethylammonium chloride and 11.4g of four Ethoxysilane, polymerized for 3 hours, cooled to 25° C., and then added 1.2 g of acetic acid to neutralize the emulsion to neutral to obtain ...

Embodiment 2

[0047] (1) Add 3.4g of octadecyltrimethylammonium chloride and 6.2g of isomeric tridecyl alcohol polyoxyethylene ether (the number of moles of added ethylene oxide = 7) to a 500mL glass cup, and use 112.8g Dissolve in water, after fully dissolved, add 57.4g octamethylcyclotetrasiloxane (D4), stir to make it evenly mixed, and then shear at high speed (5000 rpm) in a shear emulsification mixer for 10 minutes to form organic Silicone monomer pre-emulsion: transfer the organosilicon monomer pre-emulsion to a high-pressure homogenizer, and homogenize for 1 minute under a homogeneous pressure of 30Mpa to form an organosiloxane monomer emulsion.

[0048] (2) Heat the organosiloxane monomer emulsion to 90°C, add 10g of 10wt% potassium hydroxide solution, react for 6 hours, cool to 40°C, add 1.2g of octadecyltrimethylammonium chloride and 7.6g of four Ethoxysilane, polymerized for 3 hours, cooled to 20°C, then added 1.2g of acetic acid to neutralize the emulsion to neutral to obtain a ...

Embodiment 3

[0051] (1) Add 3.4g of octadecyltrimethylammonium chloride and 6.2g of isomeric tridecyl alcohol polyoxyethylene ether (the number of moles of added ethylene oxide = 7) into a 500mL glass cup, and use 116.6g Dissolve in water, after fully dissolved, add 57.4g octamethylcyclotetrasiloxane (D4), stir to make it evenly mixed, and then shear at high speed (5000 rpm) in a shear emulsification mixer for 10 minutes to form organic Silicone monomer pre-emulsion: transfer the organosilicon monomer pre-emulsion to a high-pressure homogenizer, and homogenize for 1 minute under a homogeneous pressure of 30Mpa to form an organosiloxane monomer emulsion.

[0052] (2) Heat the organosiloxane monomer emulsion to 70°C, add 10g of 10wt% potassium hydroxide solution, react for 6 hours, cool to 40°C, add 1.2g of octadecyltrimethylammonium chloride and 3.8g of four Ethoxysilane, polymerized for 3 hours, cooled to 25° C., and then added 1.2 g of acetic acid to neutralize the emulsion to neutral to ...

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Abstract

The invention discloses film-forming polysiloxane emulsion and a preparation method thereof. The preparation method of the film-forming polysiloxane emulsion comprises the following steps of: dissolving 0.02-20 parts by weight of composite surfactant to 100 parts of water; adding 10-60 parts by weight of organo-silicone monomers, shearing the organo-silicone monomers by a shearing and emulsifying stirrer, and homogenizing the organo-silicone monomers under 20Mpa-60Mpa to obtain organo-silicone monomer emulsion; raising the temperature of the organo-silicone monomer emulsion to 70 DEG C to 90 DEG C, adding 0.01-10 parts of catalyst for reacting for 4-6 hours, cooling the reaction liquid to 40 DEG C to 60 DEG C, adding 0.5-5 parts of a cationic surfactant and 0.05-20 parts of a cross-linking agent for reacting for 1-3 hours cooling the reaction liquid to 20 DEG C to 30 DEG C and adding acetic acid to neutralize the emulsion to be neutral so as to obtain the film-forming polysiloxane emulsion. The method for preparing the film-forming polysiloxane emulsion is less in steps, simple to operate, low in cost and high in conversion rate. The obtained film-forming polysiloxane emulsion can be placed for more than three months at normal temperature without layering or emulsion-breaking.

Description

technical field [0001] The invention relates to the field of polysiloxane emulsion preparation, in particular to a film-forming polysiloxane emulsion and a preparation method thereof. Background technique [0002] Organopolysiloxanes that can be cured and crosslinked to form rubber or resin films are widely used in papermaking, textiles, pulp, coatings, construction, leather, medicine, cosmetics and other industrial fields, and their application fields are constantly expanding. very big. However, most of the preparation of such film-forming polysiloxane emulsions requires the use of metal compound catalysts. However, metal compound catalysts have problems in terms of safety. [0003] JP1981-36546 discloses a silicone rubber emulsion composition, which includes vinyl-terminated polydimethylsiloxane, Si-H bond-containing polysiloxane, emulsifier, water and platinum catalyst. The emulsion is formed by mass action, and the emulsion is heated to form a cross-linked latex, and ...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D183/10C08G77/06C08G77/04C08G77/44
Inventor 沈敏敏莫建强周宝文孙淳宁邓莲丽
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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