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Hard-core and soft-shell type acrylic emulsion, and preparation method and application thereof

A technology of acrylic emulsion, hard core and soft shell, which is applied in the direction of coating, etc., can solve the problems of film-forming performance, impact resistance and flexibility, reducing the damping performance of the high-temperature zone of the coating film, and the poor high-temperature damping performance of the polymer. Achieve the effects of increasing glass transition temperature, wide damping temperature range, ensuring impact resistance and flexibility

Active Publication Date: 2018-06-08
广州化工研究设计院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the impact resistance and flexibility of the coating film, it is often necessary to appropriately increase the amount of polymer emulsion in the blending formula. However, due to the poor high-temperature damping performance of the polymer, the increase of the polymer content will significantly reduce the damping of the high-temperature zone of the coating film. performance
Increasing the glass transition temperature of the polymer emulsion is conducive to improving the damping performance in the high temperature region, but the increase of the glass transition temperature will lead to a decrease in film-forming performance, impact resistance and flexibility.

Method used

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  • Hard-core and soft-shell type acrylic emulsion, and preparation method and application thereof

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preparation example Construction

[0043] The preparation method of above-mentioned hard-core soft-shell type acrylic emulsion, comprises the following steps:

[0044] 1) Dissolving 0.5-3 parts of initiator into 30-40 parts of water to obtain an initiator solution;

[0045] 2) Mix 0.5-1 part of emulsifier and 40-50 parts of water evenly, then add 30-70 parts of hard monomer, 20-50 parts of soft monomer and 1-3 parts of functional monomer, mix well to obtain pre-emulsification Monomer A;

[0046] 3) Mix 1-2 parts of emulsifier and 30-40 parts of water evenly, then add 10-50 parts of hard monomer, 40-100 parts of soft monomer and 1-8 parts of functional monomer, mix well to obtain pre-emulsification Monomer B;

[0047] 4) Mix 0.5-2 parts of emulsifier, 20-70 parts of water and 0.5-4 parts of sodium bicarbonate evenly, raise the temperature to 80-85°C, then add 10-20 parts of pre-emulsified monomer A and 7-12 parts of initiator agent solution, react fully, adjust the temperature to 80-90°C, then add the remaini...

Embodiment 1

[0051] A kind of hard core soft shell type acrylic emulsion, its preparation method is as follows:

[0052] 1) 2 parts of ammonium persulfate are dissolved in 30 parts of deionized water to obtain ammonium persulfate solution;

[0053] 2) Mix 0.9 parts of nonylphenol polyoxyethylene ether ammonium sulfate and 40 parts of deionized water, stir at 500rpm for 2min, then add 50 parts of styrene, 30 parts of n-butyl acrylate, 1 part of acrylic acid and 1 part of tetrachloride Ethylene glycol dimethacrylate, stirred at 800rpm for 15min to obtain pre-emulsified monomer A;

[0054] 3) Mix 1 part of nonylphenol polyoxyethylene ether ammonium sulfate with 40 parts of deionized water, stir at 500 rpm for 2 minutes, then add 20 parts of styrene, 80 parts of n-butyl acrylate, and 2 parts of ethylene glycol dimethacrylate Ester and 2.5 parts of acrylic acid, stirred at 800rpm for 15min to obtain pre-emulsified monomer B;

[0055]4) Stir and mix 0.5 parts of nonylphenol polyoxyethylene eth...

Embodiment 2

[0057] A kind of hard core soft shell type acrylic emulsion, its preparation method is as follows:

[0058] 1) Dissolving 1.5 parts of ammonium persulfate into 35 parts of deionized water to obtain ammonium persulfate solution;

[0059] 2) Mix 0.5 parts of nonylphenol polyoxyethylene ether ammonium sulfate and 50 parts of deionized water, stir at 500rpm for 2 minutes, then add 60 parts of styrene, 20 parts of n-butyl acrylate, 2 parts of acrylic acid and 1 part of tetrachloride Ethylene glycol dimethacrylate, stirred at 800rpm for 15min to obtain pre-emulsified monomer A;

[0060] 3) Mix 2 parts of nonylphenol polyoxyethylene ether ammonium sulfate and 35 parts of deionized water, stir at 500 rpm for 2 minutes, then add 20 parts of styrene, 60 parts of n-butyl acrylate, 10 parts of isooctyl acrylate, 2 parts Ethylene glycol dimethacrylate and 2.5 parts of acrylic acid were stirred at 800 rpm for 15 minutes to obtain pre-emulsified monomer B;

[0061] 4) Stir and mix 1 part o...

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Abstract

The invention discloses a hard-core and soft-shell type acrylic emulsion, and a preparation method and an application thereof. The hard-core and soft-shell type acrylic emulsion is prepared from the following raw materials in parts by mass: 50 to 120 parts of a hard monomer, 60 to 150 parts of a soft monomer, 1 to 15 parts of a functional monomer, 1 to 5 parts of an emulsifier, 0.5 to 4 parts of sodium bicarbonate, 0.5 to 4 parts of an initiator, 4 to 7 parts of ammonia water and 100 to 200 parts of water. The hard-core and soft-shell type acrylic emulsion provided by the invention has simplepreparation process, and only needs reasonable adjustment of the addition ratio of the soft monomer to the hard monomer in the process of emulsion polymerization. The hard-core and soft-shell type acrylic emulsion provided by the invention can be used for waterborne damping coatings; the waterborne damping coating prepared from the hard-core and soft-shell type acrylic emulsion has wide damping temperature range; and the contradictions between high-temperature damping performance with impact resistance and flexibility of the coating can be well solved.

Description

technical field [0001] The invention relates to a hard-core soft-shell type acrylic emulsion and a preparation method and application thereof. Background technique [0002] Water-based damping coating is a kind of water-based coating with vibration and noise reduction function obtained by blending polymer emulsion, filler and additives. It has the advantages of environmental protection, construction safety, and strong adaptability to the surface to be treated. The field of noise has extremely broad application prospects. As an important part of water-based damping coatings, polymer emulsion plays an extremely important role in the vibration and noise reduction of coatings. [0003] At present, many studies on emulsions for water-based damping coatings have been reported, and the research content is mainly aimed at how to broaden the effective temperature range of water-based damping coatings. According to TB / T 2932-1998 Technical Conditions for the Supply of Damping Coatin...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F212/08C08F222/20C08F220/06C08F220/48C08F220/56C08F2/28C08F2/26C09D133/08C09D125/14C09D133/12
CPCC09D125/14C09D133/08C09D133/12C08F2/26C08F2/28C08F212/08C08F220/14C08F220/18C08F220/1804C08F222/102C08F220/06C08F220/1808C08F220/46C08F220/48C08F220/56
Inventor 莫杨妙杨斌扶昭富王怡博陈绵锋
Owner 广州化工研究设计院有限公司
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