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Method for preparing Pickering acrylic polymer emulsion

An acrylic polymer, acrylic technology, applied in the direction of coating, can solve problems such as blank, achieve the effect of good water resistance and erosion resistance, good application value, great application prospect and industrialization ability

Active Publication Date: 2014-08-20
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many domestic research institutes have reached a certain level of research on Pickering emulsification technology, the application of this technology is basically blank in China, especially the combination of Pickering emulsification technology and traditional emulsion polymerization technology to develop and produce products is unheard of

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  • Method for preparing Pickering acrylic polymer emulsion
  • Method for preparing Pickering acrylic polymer emulsion
  • Method for preparing Pickering acrylic polymer emulsion

Examples

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specific Embodiment approach

[0032] A kind of preparation method of Pickering acrylic acid polymer emulsion, prepare according to the following method:

[0033] (1) Add amphiphilic nanoparticles, acrylic monomer, buffer, protective colloid and water into the reaction vessel, and stir vigorously for 20-40 minutes to prepare a pre-emulsion; wherein the acrylic monomer accounts for the mass fraction of the total amount of all reaction substances 30% to 55%, the mass fraction of the buffering agent in the total amount of all reaction substances is 0.1% to 0.25%, the mass fraction of the protective colloid in the total amount of all reaction substances is 0.1% to 0.35%, and the mass fraction of the amphiphilic nanoparticles is 0.5% to 2.5% of the mass of acrylic monomer;

[0034] (2) configure an initiator aqueous solution with a mass fraction of 2% to 5%, and the initiator mass is 0.2 to 0.8% of the mass of the acrylic monomer; the initiator is formed by arbitrarily mixing an oxidizing agent and a reducing ag...

Embodiment 1

[0048] Embodiment 1: a kind of preparation method of Pickering acrylic acid polymer emulsion, prepare according to the following method:

[0049] (1) Preparation of epoxy-modified nanoparticles:

[0050] Disperse 1.5g of nano-silica particles in 40g of ethanol, then drop 2g of glycidyl etheroxypropyltriethoxysilane (GPTEOS) dropwise into it, stir vigorously, and react at 50°C for 24h; then carry out After centrifugal separation, the nano-silica particles are separated, washed once with deionized water, washed twice with ethanol, and then vacuum-dried at 100° C. for 10 hours to obtain epoxy-modified nano-silica particles.

[0051] (2) Preparation of amino-modified nanoparticles:

[0052] Weigh 1.5g of epoxy-modified nano-silica particles and disperse them in 40g of ethanol, add 1g of hexamethylenediamine, stir well, and react at 50°C for 6h; then perform centrifugation to separate the nano-silica particles , washed once with deionized water, washed twice with ethanol, and the...

Embodiment 2

[0057] Embodiment 2: a kind of preparation method of Pickering acrylic acid polymer emulsion, prepare according to the following method:

[0058] (1) Preparation of epoxy-modified nanoparticles:

[0059] Disperse 0.5g of nano-silica particles in 30g of ethanol, then drop 1.0g of glycidyl etheroxypropyltriethoxysilane (GPTEOS) into it dropwise, stir vigorously, and react at 50°C for 24h; then Carry out centrifugation to separate the nano-silica particles, wash once with deionized water, wash twice with ethanol, and then vacuum-dry at 100° C. for 10 hours to obtain epoxy-modified nano-silica particles.

[0060] (2) Preparation of amino-modified nanoparticles:

[0061] Weigh 0.5g of epoxy-modified nano-silica particles and disperse them in 30g of ethanol, add 1.0g of hexamethylenediamine, stir well, and react at 50°C for 6h; then perform centrifugation to separate the nano-silica particles Afterwards, wash once with deionized water, wash twice with ethanol, and then vacuum-dry ...

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Abstract

The invention relates to a method for preparing a Pickering acrylic polymer emulsion. According to the invention, an amphiphilic nano-particle is mainly taken as a stabilizer, an acrylic monomer is taken as an oil phase, and Pickering emulsion polymerization is carried out in the selected redox initiation system to directly produce an acrylic nanocomposite. Since the curing product of the nanocomposite is free of a surfactant, the nanocomposite has excellent water resistance and anti-erosion performance. In addition, the nanocomposite has the both advantages of the polymer and the nano-particle, and therefore the nanocomposite has better mechanical properties, thermal stability, corrosion resistance and other performances than the conventional polymer material.

Description

technical field [0001] The invention relates to a composite material, in particular to a method for preparing Pickering acrylic polymer emulsion. Background technique [0002] Due to the advantages of both polymers and nanoparticles, nanocomposites show extremely superior performance in terms of mechanical properties, thermal stability, corrosion resistance, and flame retardancy. By changing the type of nanoparticles in the early stage, it can also Further endow the product with antibacterial, anti-radiation, catalytic performance and photoelectric performance, etc., so it is widely used in many industrial production fields, such as coatings, adhesives, resin products, fiber reinforced materials, etc. (E.P.Giannelis.Adv.Mater.1996, 8, 29-35; B.M. Novak. Adv. Mater. 1993, 5, 422-433; S. Komarneni. J. Mater. Chem. 1992, 2, 1219-1230; D. R. Paul, L. M. Robeson. -3204). So far, the preparation methods of nanocomposites mainly include physical blending and chemical grafting. Th...

Claims

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Application Information

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IPC IPC(8): C08F120/14C08F220/14C08F220/18C08F2/44C08K9/04C08K3/36C09D133/12C09D7/12
Inventor 洪杰林金斌
Owner SKSHU PAINT
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