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Method for preparing silicone modified polyacrylate mini-emulsion

A technology of polyacrylate and acrylate, which is applied in the field of preparation of silicone-modified polyacrylate emulsion, can solve the problem of low monomer content and achieve good stability

Inactive Publication Date: 2018-03-20
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Low monomer content (less than 5%), which limits the modification of silicone-modified polyacrylate emulsions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of organosilicon modified polyacrylate miniemulsion is characterized in that: comprises the following steps:

[0023] (1) Add cetyl alcohol to the mixture of acrylate monomer and silicone monomer, and stir for 1 hour to obtain an oil phase mixture; wherein, the mass ratio of acrylate monomer, silicone monomer, and cetyl alcohol is 10 :8:15; the acrylate monomer is methyl methacrylate and n-butyl acrylate with a mass ratio of 1:1; the organosilicon monomer is propyl trimethoxy with a mass ratio of 1:1.5 Silicone and methyltrimethoxysilane;

[0024] (2) Dissolve the emulsifier in water and stir for 1 hour to obtain a water phase mixture; the emulsifier is alkylphenol polyoxyethylene ether; the mass ratio of the emulsifier to water is 1:20;

[0025] (3) Add the oil phase mixture obtained in step (1) to the water phase mixture obtained in step (2) according to the mass ratio of 1:1. After stirring, ultrasonically react for 15 minutes; wherein, the ul...

Embodiment 2

[0029] The preparation method of organosilicon modified polyacrylate miniemulsion is characterized in that: comprises the following steps:

[0030] (1) Add cetyl alcohol to the mixture of acrylate monomer and silicone monomer, and stir for 3 hours to obtain an oil phase mixture; wherein, the mass ratio of acrylate monomer, silicone monomer, and cetyl alcohol is 10 :8:15; the acrylate monomer is methyl methacrylate and n-butyl acrylate with a mass ratio of 1:1; the organosilicon monomer is propyl trimethoxy with a mass ratio of 1:1.5 Silicone and methyltrimethoxysilane;

[0031] (2) Dissolve the emulsifier in water and stir for 2 hours to obtain a water phase mixture; the emulsifier is alkylphenol polyoxyethylene ether; the mass ratio of the emulsifier to water is 1:20;

[0032] (3) Add the oil phase mixture obtained in step (1) to the water phase mixture obtained in step (2) according to the mass ratio of 1:1. After stirring, ultrasonically react for 15 minutes; wherein, the ...

Embodiment 3

[0036] The preparation method of organosilicon modified polyacrylate miniemulsion is characterized in that: comprises the following steps:

[0037] (1) Add cetyl alcohol to the mixture of acrylate monomer and organosilicon monomer, and stir for 1.5 hours to obtain an oil phase mixture; wherein, the mass ratio of acrylate monomer, organosilicon monomer, and cetyl alcohol is 10:8:15; the acrylate monomer is methyl methacrylate and n-butyl acrylate with a mass ratio of 1:1; the organosilicon monomer is propyltrimethylmethacrylate with a mass ratio of 1:1.5 Oxysilane and Methyltrimethoxysilane;

[0038] (2) Dissolve the emulsifier in water and stir for 1.5 hours to obtain a water phase mixture; the emulsifier is alkylphenol polyoxyethylene ether; the mass ratio of the emulsifier to water is 1:20;

[0039] (3) Add the oil phase mixture obtained in step (1) to the water phase mixture obtained in step (2) according to the mass ratio of 1:1. After stirring, ultrasonically react for 1...

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PUM

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Abstract

The invention discloses a method for preparing silicone modified polyacrylate mini-emulsion. The method comprises the following steps: (1) adding hexadecyl alcohol into a mixture of an acrylate monomer and a silicone monomer, and stirring for 1-3 hours to obtain an oil-phase mixture; (2) dissolving an emulsifier into water, and stirring for 1-2 hours so as to obtain an aqueous phase mixture; (3) adding the oil-phase mixture obtained in the step (1) into the aqueous phase mixture obtained in the step (2) according to a mass ratio of 1:1, stirring, and carrying out an ultrasonic reaction for 15minutes; (4) stirring the mixture obtained in the step (3) in a nitrogen atmosphere for 30-50 minutes; and (5) raising the temperature to 60 DEG C, adding a reducing agent (hydrogen sulfite), adding an oxidizing agent (potassium persulfate), and reacting for 4-6 hours, thereby obtaining the product. According to the silicone modified polyacrylate mini-emulsion prepared by the method provided by the invention, the coagulation rate is as low as 0.81%, the particle size is as low as 76nm, the particle size distribution is only 0.12, and the stability is excellent.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a preparation method of organosilicon-modified polyacrylate emulsion. Background technique [0002] Silicone-modified polyacrylate emulsion not only has the weather resistance, film-forming properties and excellent mechanical properties of polyacrylate, but also has the water resistance, high and low temperature resistance and air permeability of silicone, and is expected to become a high weather resistance and Environmentally friendly architectural coatings with high water resistance have received widespread attention. The silicone modification method of polyacrylate emulsion can be divided into physical modification and chemical modification. The physical modification method is only realized by physical blending, and the operation is simple, but due to the large difference in polarity between silicone and polyacrylate, the compatibility is poor, and the m...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F8/42
CPCC08F8/42C08F220/14C08F220/18C08F220/1804
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM
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