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A kind of core-shell emulsion and preparation method thereof

A technology of core-shell emulsion and emulsion, which is applied in coating and other directions, can solve problems such as low adhesion, poor water resistance, and insufficient hardness, and achieve the effects of mild preparation conditions, improved water resistance, and excellent performance

Active Publication Date: 2022-01-25
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the core-shell emulsions currently prepared still have shortcomings such as insufficient hardness, poor water resistance, and low adhesion. Therefore, it is necessary to find a method for preparing core-shell emulsions to obtain core-shell emulsions with excellent performance.

Method used

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  • A kind of core-shell emulsion and preparation method thereof
  • A kind of core-shell emulsion and preparation method thereof
  • A kind of core-shell emulsion and preparation method thereof

Examples

Experimental program
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preparation example Construction

[0071] Another aspect of the present invention is to provide a method for preparing a core-shell emulsion, preferably a method for preparing the above-mentioned core-shell emulsion, the method comprising the following steps:

[0072] Step 1, prepare pre-emulsion;

[0073] According to the present invention, the concrete process of preparing pre-emulsion is:

[0074] Step a, add anionic emulsifier and nonionic emulsifier into 90ml deionized water at the same time, mix well, and prepare a composite emulsifier aqueous solution, and then divide the composite emulsifier aqueous solution into 3 parts by volume, respectively 35ml, 25ml and 30ml;

[0075] Step b, add the core monomer into 35ml of emulsifier solution, mix well at room temperature, and pre-emulsify for 2 hours to obtain a pre-emulsified core emulsion; add the shell monomer into 25ml of emulsifier aqueous solution, mix well at room temperature, and pre-emulsify for 2 hours , to obtain a pre-emulsified shell emulsion; a...

Embodiment 1

[0106] (1) Preparation of pre-emulsion

[0107] Add 1.33g SR-10 and 0.67g OP-10 into 90mL deionized water together to make the emulsifier aqueous solution required for the experiment. The experiment needs to divide the emulsifier aqueous solution into three parts, 35mL, 25mL and 30mL respectively.

[0108] Add the nuclear monomer (35gMMA+15gBA) into 35mL of emulsifier aqueous solution, mix thoroughly under the stirring of an electric stirrer at room temperature, and pre-emulsify for 2 hours to obtain a milky white and stable pre-emulsified nuclear emulsion; similarly , the shell monomer (15gMMA+35gBA) was added to 25mL emulsifier aqueous solution, fully stirred at room temperature, and pre-emulsified for 2h to obtain a pre-emulsified shell emulsion. Add 0.3g NaHCO to the remaining 30mL emulsifier aqueous solution 3 Buffer, prepare the buffer solution used in the experiment.

[0109] (2) Preparation of seed emulsion

[0110] Add buffer solution, 1 / 3 initiator solution and 1...

Embodiment 2

[0116] The difference between this embodiment and Example 1 is that 2 g of acrylic acid monomers are also included in the core monomer, and other steps are the same as in Example 1.

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Abstract

The invention discloses a nuclear shell lotion and its preparation method. The raw materials of the nuclear shell lotion include mixed monomers, emulsifiers, causes, buffer, and water.The present invention uses a semi -continuous emulsion aggregation method to obtain a nuclear shell lotion. The latex film formed by the acrylics obtained has good water resistance, hardness and adhesion, and the preparation process is simple, the raw materials are easy to obtain, and the conditions are mild, which is suitable for large -scale industrialized production.

Description

technical field [0001] The invention relates to the field of architectural coatings, in particular to a core-shell emulsion and a preparation method thereof. Background technique [0002] Core-shell latex paint is the main variety of building exterior wall paint at home and abroad, but its performance needs to be improved, such as hardness, adhesion, stain resistance and water resistance. [0003] The properties of core-shell acrylate latex coatings are mainly determined by the raw materials and polymerization process of the acrylate emulsion. Core-shell acrylate emulsion polymerization is developed on the basis of seed emulsion polymerization. [0004] Emulsion polymerization has its own unique characteristics. The advantages are: the polymerization speed is very fast, and the molecular weight of the product is high; water as a dispersant medium is conducive to heat transfer and temperature control, reducing environmental pollution; the viscosity of the emulsion polymeriza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/32C08F2/26C08F2/30C09D133/12C09D133/08
CPCC08F220/14C08F220/18C08F2/26C08F2/30C09D133/12C09D133/08
Inventor 殷榕灿陶栋梁金凤崔玉民王永忠姜广鹏张琳陈继堂
Owner FUYANG NORMAL UNIVERSITY