Organic silicon modified acrylic emulsion and preparation method thereof

An acrylic emulsion and silicone technology, applied in the field of new materials, can solve the problems of limited use range, high temperature viscosity, poor water resistance, etc., and achieve the effects of good mechanical stability, improved water resistance, and low gel rate

Inactive Publication Date: 2018-08-03
GUANGZHOU SILOK POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the acrylate film is formed, it generally has the disadvantages of poor water resistance, brittleness at low temperature, and stickiness at high temperature.
limit its use

Method used

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  • Organic silicon modified acrylic emulsion and preparation method thereof
  • Organic silicon modified acrylic emulsion and preparation method thereof
  • Organic silicon modified acrylic emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The emulsion of the present invention includes water, methyl methacrylate, n-butyl acrylate, acrylic acid, hydroxyethyl acrylate, epoxy-terminated polydimethylsiloxane, allyloxy fatty alcohol oxyethylene ether ammonium sulfate, peroxide Ammonium sulfate, and a pH regulator. The contents of the above components are calculated in parts by mass: 55 parts of water; 20 parts of methyl methacrylate; 20 parts of n-butyl acrylate; 3 parts of acrylonitrile; 1 part of acrylic acid; 1 part of hydroxyethyl acrylate; 2 parts of base polydimethylsiloxane, 5.8 parts of allyloxy fatty alcohol oxyethylene ether ammonium sulfate, 1 part of ammonium persulfate, and 0.5 parts of pH regulator.

[0030] The preparation method of the present invention comprises the following steps:

[0031] Stir 19 parts of n-butyl acrylate, 19 parts of methyl methacrylate and 2 parts of single-ended epoxy polydimethylsiloxane evenly to obtain a mixture with a viscosity of 20 mPa·s at 25°C; among them, the e...

Embodiment 2

[0042] The emulsion of the present invention comprises water, styrene, n-butyl acrylate, acrylic acid, hydroxyethyl acrylate, epoxy-terminated polydimethylsiloxane, allyloxy fatty alcohol oxyethylene ether ammonium sulfate, ammonium persulfate, and pH regulators. The contents of the above components are calculated in parts by mass: 55 parts of water; 20 parts of styrene; 20 parts of n-butyl acrylate; 3 parts of acrylonitrile; 1 part of acrylic acid; 1 part of hydroxyethyl acrylate; 5 parts of methyl siloxane, 6.2 parts of allyloxy fatty alcohol oxyethylene ether ammonium sulfate, 1 part of ammonium persulfate, and 0.5 parts of pH regulator.

[0043] The preparation method of the present invention comprises the following steps:

[0044] Stir 19 parts of styrene, 19 parts of n-butyl acrylate and 5 parts of epoxy-terminated polydimethylsiloxane evenly to obtain a mixture with a viscosity of 20 mPa·s at 25°C; among them, epoxy-terminated polydimethylsiloxane The epoxy group mass...

Embodiment 3

[0052] The emulsion of the present invention comprises water, styrene, n-butyl acrylate, acrylic acid, hydroxyethyl acrylate, epoxy-terminated polydimethylsiloxane, allyloxy fatty alcohol oxyethylene ether ammonium sulfate, ammonium persulfate, and pH regulators. The contents of the above components are calculated in parts by mass: 55 parts of water; 20 parts of styrene; 20 parts of n-butyl acrylate; 3 parts of acrylonitrile; 1 part of acrylic acid; 1 part of hydroxyethyl acrylate; 7 parts of methyl siloxane, 6.9 parts of allyloxy fatty alcohol oxyethylene ether ammonium sulfate, 1 part of ammonium persulfate, and 0.6 parts of pH regulator.

[0053]The preparation method of the present invention comprises the following steps:

[0054] Stir 19 parts of styrene, 19 parts of n-butyl acrylate and 7 parts of epoxy-terminated polydimethylsiloxane evenly to obtain a mixture with a viscosity of 20 mPa·s at 25°C; among them, epoxy-terminated polydimethylsiloxane The mass content of e...

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Abstract

The invention provides an epoxy organosiloxane modified acrylic emulsion and a preparation method thereof. The emulsion is specifically obtained by performing emulsion polymerization on an acrylic monomer, a single-end epoxy polysiloxane, an initiator, an emulsifier, a pH buffering agent and deionized water, wherein epoxy organosiloxane is a linear organopolysiloxane having an epoxy group bonded to silicon at one end. The invention further provides the preparation method of the modified acrylate emulsion; and the method comprises the steps of dissolving the single-end epoxy polysiloxane by using the acrylic monomer, preparing a pre-emulsion by emulsification, preparing a seed emulsion from acrylate and/or methacrylate and the emulsifier, and adding the pre-emulsion dropwise into the seed emulsion to complete the polymerization reaction. According to the method provided by the invention, the emulsion obtained by the method has good adhesion, surface hand feel, water resistance and stainresistance.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to an organosilicon-modified acrylic emulsion and a preparation method thereof. technical background [0002] Acrylic emulsions have excellent film-forming properties, good weatherability, gloss, and adhesion. However, after the acrylate film is formed, it generally has the disadvantages of poor water resistance, brittleness at low temperature, and stickiness at high temperature. limited its scope of use. Using the characteristics of low surface energy, high temperature resistance, water resistance and good air permeability of silicone materials, the modification of acrylic emulsion can eliminate the inherent defects of acrylic polymer and greatly improve the performance of the emulsion. [0003] Judging from the research status at home and abroad, the modification of acrylates by organosiloxanes mostly uses small molecule coupling agents or polysiloxanes with unsaturated fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/44C08F220/20C08F8/08C08F8/42
CPCC08F8/08C08F8/42C08F220/14C08F220/1804C08F220/06C08F220/44C08F220/20
Inventor 孙东明燕刚强罗文景卢灼均
Owner GUANGZHOU SILOK POLYMER
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