Crosslinked polysiloxane/acrylic ester compound emulsion, and preparation method and application thereof

A technology for cross-linking polysiloxane and polyacrylate emulsion, applied in latex paint, coating and other directions, can solve the problems of high preparation cost, high equipment requirements, difficult polymerization process, etc., and achieves simple operation and high safety. , the effect of low cost

Active Publication Date: 2013-12-04
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, the chemical reaction method has the disadvantages of relatively difficult polymerization process, high requirements for equipment, and high preparation cost.

Method used

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  • Crosslinked polysiloxane/acrylic ester compound emulsion, and preparation method and application thereof
  • Crosslinked polysiloxane/acrylic ester compound emulsion, and preparation method and application thereof
  • Crosslinked polysiloxane/acrylic ester compound emulsion, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 0.7g of octadecyltrimethylammonium chloride and 0.5g of isomeric tridecyl alcohol polyoxyethylene ether (the number of moles of added ethylene oxide = 7) to a 500mL glass, and use 118g of water Dissolve, after fully dissolved, add 12g 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 organosiloxane alkane monomer pre-emulsion; transfer the organosilicon monomer pre-emulsion to a high-pressure homogenizer, and homogenize once under a homogenizing pressure of 30Mpa to form an organosiloxane monomer emulsion.

[0046] (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 1.2g of four Ethoxysilane, polymerized for 3 hours, cooled to 25°C, then added 1g of acetic acid to neutralize the emulsion to neutral, filtered and discharged...

Embodiment 2

[0050] (1) Add 1.4g of octadecyltrimethylammonium chloride and 1g of isomeric tridecyl alcohol polyoxyethylene ether (the number of moles of added ethylene oxide = 7) into a 500mL glass, and dissolve it in 118g of water , after fully dissolved, add 24g of 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 organosiloxane Monomer pre-emulsion: transfer the organosilicon monomer pre-emulsion to a high-pressure homogenizer, and homogenize once under a homogenizing pressure of 40Mpa to form an organosiloxane monomer emulsion.

[0051] (2) Heat the organosiloxane monomer emulsion to 90°C, add 20g of 10wt% potassium hydroxide solution, react for 6 hours, cool to 40°C, add 1.2g of octadecyltrimethylammonium chloride and 2.4g of four Ethoxysilane, polymerized for 3 hours, cooled to 20°C, then neutralized by adding 2g of acetic acid, and filtered out to obtain a cross-linked poly...

Embodiment 3

[0055] (1) Add 3g of octadecyltrimethylammonium chloride and 2g of isomeric tridecyl alcohol polyoxyethylene ether (the number of moles of added ethylene oxide = 7) into a 500mL glass, dissolve it in 118g of water, After fully dissolved, add 36g of 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 organosiloxane body pre-emulsion; transfer the organosilicon monomer pre-emulsion to a high-pressure homogenizer, and homogenize once under a homogenizing pressure of 20Mpa to form an organosiloxane monomer emulsion.

[0056] (2) Heat the organosiloxane monomer emulsion to 70°C, add 20g of 10wt% potassium hydroxide solution, react for 6 hours, cool to 40°C, add 3.6g of octadecyltrimethylammonium chloride and 3.6g of four Ethoxysilane, polymerized for 3 hours, cooled to 25°C, then neutralized by adding 2g of acetic acid, and filtered out to obtain a cross-linked polysiloxane e...

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Abstract

The invention discloses crosslinked polysiloxane / acrylic ester compound emulsion, and a preparation method and application thereof. The preparation method comprises the following steps: performing shear emulsification and high-pressure homogenization on an organic siloxane monomer, water and a composite emulsifier to prepare a siloxane monomer emulsion; adding a crosslinking agent to prepare a crosslinked polysiloxane emulsion; and compounding the crosslinked polysiloxane emulsion and a polyacrylic ester emulsion, which is prepared by a continuous emulsion polymerization method, by a simple process to obtain the stable and high-compatibility crosslinked polysiloxane / acrylic ester compound emulsion. The crosslinked polysiloxane / acrylic ester compound emulsion has the characteristics of excellent hydrophobicity, low-temperature resistance, high-temperature resistance, water tolerance, alkali resistance, stain resistance and the like of olysiloxane emulsion as well as the characteristics of film-forming property, weather resistance, ozone resistance, uvioresistant capability and the like of acrylic emulsion and can be applied to building paint of inner walls, outer walls, floors, bathrooms and the like.

Description

technical field [0001] The invention belongs to the field of polysiloxane / acrylate compound emulsion, and relates to a crosslinked polysiloxane / acrylate compound emulsion and its preparation method and application. Background technique [0002] Polysiloxane has low surface tension, low glass transition temperature, good permeability, and water resistance, temperature resistance, and weather resistance. However, due to the high cost, poor adhesion and film-forming properties of silicone, its further application is limited. limit. Among many polymer materials, acrylate polymers have excellent weather resistance, oil resistance, ozone resistance and UV resistance due to the saturated carbon-carbon bond structure in the main chain and polar ester groups in the side chains. Used in coatings, adhesives, fabric finishing and leather finishing and other fields. However, acrylate copolymers have the disadvantages of poor low temperature resistance, heat resistance, water resistance...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L33/12C08G77/04C08G77/06C08F120/14C08F2/28C08F2/30C09D183/04C09D133/12C09D5/02
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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