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Multifunctional quaternary soap-free vinyl acetate-acrylic emulsion and preparation method thereof

A vinegar-acrylic emulsion, multi-functional technology, applied in the field of multifunctional quaternary soap-free vinegar-acrylic emulsion and its preparation, can solve the problem of low solid content, large difference in reactivity ratio, and high solid content soap-free emulsion. and other problems, to achieve the effect of solving the problem of low solid content and simple preparation method

Inactive Publication Date: 2016-07-06
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Vinegar-acrylic emulsion adhesives are widely used as a type of emulsion-type adhesives. They have high transparency and superior aging resistance. Usually, soap-free acetic-acrylic emulsions use vinyl acetate and butyl acrylate as monomers. Carry out binary soap-free emulsion polymerization, because the reactivity ratio of the two monomers is quite different, the stability and water resistance of the obtained soap-free acrylic emulsion are very poor; I (patent number 2015107919897) added acrylic acid as a functional monomer to carry out The ternary soap-free vinegar-acrylic emulsion obtained by soap-free emulsion polymerization has improved stability, but the solid content is not high, and the emulsion is strongly acidic
At present, there are many researches on the nucleation mechanism and kinetics of soap-free emulsion polymerization in the world, but the research on the solid content and stability of soap-free emulsion is not enough. Most of the prepared soap-free emulsions have a solid content of 10% to 30%. , there is not much research on the preparation of high solids soap-free emulsions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Dissolve 0.168g of methallyl alcohol polyoxyethylene ether and 0.07g of sodium methacrylate sulfonate in 10g of deionized water, mix evenly, heat in a constant temperature water bath at 80°C and keep stirring;

[0017] 2) Evenly mix 13g of vinyl acetate, 7g of butyl acrylate, 0.2g of acrylic acid, and 0.8g of acrylonitrile to form a polymerized monomer, take 1 / 6 of the polymerized monomer and drop it into a four-necked flask, and then add 1 / 6 dropwise after 20 minutes 2 initiator solution;

[0018] 3) Slowly add the remaining part step 2) Polymerize the monomer and initiator solution. After the titration is completed, raise the temperature to 85°C, keep the temperature constant for two hours, and cool down to room temperature to form an emulsion;

[0019] 4) Use 1mol / L sodium hydroxide solution to adjust the pH of the emulsion in step 3) to 7~8, filter and collect the material, and the product is obtained;

[0020] The preparation of the initiator solution: dissolve...

Embodiment 2

[0023] 1) Dissolve 0.189g of methallyl alcohol polyoxyethylene ether and 0.05g of sodium methacrylate sulfonate in 10g of deionized water, mix evenly, heat in a constant temperature water bath at 78°C and keep stirring;

[0024] 2) Evenly mix 14g of vinyl acetate, 6g of butyl acrylate, 0.4g of acrylic acid, and 0.6g of acrylonitrile to form polymerized monomers, take 1 / 6 of the polymerized monomers and drop them into a four-necked flask, and then add 1 / 6 of them dropwise after 30 minutes 2 initiator solution;

[0025] 3) Slowly add the remaining part step 2) Polymerize the monomer and initiator solution. After the titration is completed, raise the temperature to 83°C, keep the temperature constant for two hours, and cool down to room temperature to make an emulsion;

[0026] 4) Use 1mol / L sodium hydroxide solution to adjust the pH of the emulsion in step 3) to 7~8, filter and collect the material, and the product is obtained;

[0027] The preparation of the initiator solution...

Embodiment 3

[0030] 1) Dissolve 0.21g of methallyl alcohol polyoxyethylene ether and 0.07g of sodium methacrylate sulfonate in 10g of deionized water, mix evenly, heat in a constant temperature water bath at 78°C and keep stirring;

[0031] 2) Evenly mix 14g of vinyl acetate, 6g of butyl acrylate, 0.6g of acrylic acid, and 0.4g of acrylonitrile to form a polymerized monomer, take 1 / 6 of the polymerized monomer and drop it into a four-necked flask, and then add 1 / 6 of it dropwise after 30 minutes 2 initiator solution;

[0032] 3) Slowly add the remaining part step 2) Polymerize the monomer and initiator solution. After the titration is completed, raise the temperature to 83°C, keep the temperature constant for two hours, and cool down to room temperature to make an emulsion;

[0033] 4) Use 1mol / L sodium hydroxide solution to adjust the pH of the emulsion in step 3) to 7~8, filter and collect the material, and the product is obtained;

[0034] The preparation of the initiator solution: dis...

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Abstract

The invention provides a multifunctional quaternary soap-free vinyl acetate-acrylic emulsion and a preparation method thereof, and relates to the polymerization of a vinyl acetate / butyl acrylate / acrylic acid / acrylonitrile quaternary soap-free emulsion. According to the invention, the multifunctional quaternary soap-free vinyl acetate-acrylic emulsion is easily available in raw materials, low in cost, simple in preparation method, has a high solid content of 39%-43%, a gel fraction of below 1%, a minimum film-forming temperature of 8 DEG C and good film-forming properties and tensile strength, is non-toxic and non-corrosive, avoids the influence of an emulsifier on the environment, and better solves a problem that a ternary soap-free vinyl acetate-acrylic emulsion is low in solid content.

Description

technical field [0001] The invention provides a multifunctional quaternary soap-free vinegar-acrylic emulsion and a preparation method thereof, which relate to the polymerization of vinyl acetate / butyl acrylate / acrylic acid / acrylonitrile quaternary soap-free emulsion. This soap-free emulsion has a high solid content and is stable. High performance, good film-forming properties and tensile strength. It belongs to the technical field of polymer material polymerization. Background technique [0002] Vinegar-acrylic emulsion adhesives are widely used as a type of emulsion-type adhesives. They have high transparency and superior aging resistance. Usually, soap-free acetic-acrylic emulsions use vinyl acetate and butyl acrylate as monomers. Carry out binary soap-free emulsion polymerization, because the reactivity ratio of the two monomers is quite different, the stability and water resistance of the obtained soap-free acrylic emulsion are very poor; I (patent number 2015107919897...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F218/08C08F220/18C08F220/06C08F220/46
CPCC08F218/08C08F220/1804C08F220/06C08F220/46
Inventor 肖力光张猛
Owner JILIN JIANZHU UNIVERSITY
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