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Modified hydroxyacrylate emulsion and preparation method thereof

A technology of hydroxyacrylate and hydroxybutyl methacrylate, which is applied in the field of modified hydroxyacrylate emulsion and its preparation, can solve the problems of low gloss, poor comprehensive performance and poor resistance of modified hydroxyacrylate emulsion, etc. Achieve the effects of high fullness of the paint film, low cost and improved adhesion

Active Publication Date: 2013-04-24
泰兴市华盛银洋新材料科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0003] The hydroxyacrylic acid dispersion usually used in two-component waterborne polyurethane can be divided into primary dispersion (emulsion type) and secondary dispersion type. The primary dispersion hydroxyacrylate emulsion has a higher molecular weight, so the drying speed is faster. And usually solvent-free, but less glossy and less resistant than secondary dispersion types
[0004] However, the comprehensive performance of the modified hydroxyacrylic acid ester emulsion reported at present is not very good, and there is still a certain gap compared with the secondary dispersion type hydroxyacrylic acid dispersion. Therefore, the existing technology still needs further improvement and development

Method used

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  • Modified hydroxyacrylate emulsion and preparation method thereof
  • Modified hydroxyacrylate emulsion and preparation method thereof
  • Modified hydroxyacrylate emulsion and preparation method thereof

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preparation example Construction

[0027] The present invention also provides a kind of preparation method of modified hydroxyacrylate emulsion, such as figure 1 As shown, it includes the following steps:

[0028] Step 101: Add 0.3-1 part of composite emulsifier, 25-30 parts of deionized water, 6-10 parts of acrylate monomer, 0.2-0.5 part of functional acrylic monomer and 0.08-0.12 part of electrolyte into the reactor, and Stir and emulsify for 15 to 30 minutes. After the emulsification is complete, add 0.05 to 0.1 part of initiator, and then raise the temperature in the reactor to 70°C to 85°C and fully react for 30 to 60 minutes to obtain a seed emulsion;

[0029] Step 102: Add 0.3-0.8 parts of the composite emulsifier, 30-50 parts of the acrylate monomer, 5-10 parts of the functional acrylic monomer, 2-5 parts of fluorine-containing acrylate monomer, ethylene Add 1-3 parts of base siloxane and 10-15 parts of deionized water into the emulsification tank to stir and emulsify. After the emulsification is compl...

Embodiment 1

[0033] In the reaction kettle, add 0.6 parts of composite emulsifier, 28 parts of deionized water, 6 parts of methyl methacrylate, 0.8 parts of butyl acrylate, 0.4 parts of methacrylic acid and 0.1 part of electrolyte in advance; start stirring and emulsifying for 15 minutes, emulsifying After completion, 0.06 part of initiator was added, and the temperature in the reactor was raised to 80° C. for 30 minutes to obtain a seed emulsion.

[0034] Then add 0.5 parts of compound emulsifier, 21 parts of methyl methacrylate, 13.2 parts of butyl acrylate, 0.6 parts of methacrylic acid monomer, 6 parts of hydroxyethyl methacrylate, 2 parts of hexafluorobutyl methacrylate, ethylene Add 1 part of triethoxysiloxane and 16 parts of deionized water into the dripping emulsification tank to stir and emulsify. After 3 hours to 3.5 hours after emulsification, add it dropwise to the said reaction kettle. For seed emulsion, add 0.03 parts of initiator solution synchronously. After the addition is...

Embodiment 2

[0036] In the reaction kettle, add 0.6 parts of composite emulsifier, 28 parts of deionized water, 6 parts of methyl methacrylate, 0.8 parts of butyl acrylate, 0.4 parts of methacrylic acid and 0.1 part of electrolyte in advance; start stirring and emulsifying for 15 minutes, emulsifying After completion, 0.06 part of initiator was added, and the temperature in the reactor was raised to 80° C. for 30 minutes to obtain a seed emulsion.

[0037] Then add 0.5 parts of compound emulsifier, 20 parts of methyl methacrylate, 12.2 parts of butyl acrylate, 0.6 parts of methacrylic acid monomer, 6 parts of hydroxyethyl methacrylate, 4 parts of hexafluorobutyl methacrylate, ethylene Add 1 part of base triethoxysiloxane and 16 parts of deionized water into the dripping emulsification tank to stir and emulsify. After 3 hours to 3.5 hours after emulsification, add it dropwise to the reaction kettle. Seed emulsion, add 0.03 parts of initiator solution synchronously. After the addition is com...

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Abstract

The invention discloses a modified hydroxyacrylate emulsion and a preparation method thereof. The modified hydroxyacrylate emulsion comprises 0.6-1.8 parts of composite emulsifier, 35-45 parts of deionized water, 36-50 parts of acrylate monomer, 0.2-0.5 part of functional acrylic monomer, 0.08-0.12 part of electrolyte, 0.05-0.2 part of initiator, 5-10 parts of functional acrylic monomer, 2-5 parts of fluorine-containing acrylate monomer, 1-3 parts of vinyl siloxane and 0.1-2 parts of amine neutralizer. The polymerizable fluorine-containing acrylate monomer is introduced in the emulsion polymerization process, and the polymerizable vinyl siloxane is introduced in the later polymerization period, so that the modified hydroxyacrylate emulsion has the advantages of high durability, weather resistance, corrosion resistance, self-cleaning performance, acid resistance, alkali resistance, strong adhesiveness, high decoration performance, high paint film fullness and the like.

Description

technical field [0001] The invention relates to the field of surface coatings, in particular to a modified hydroxyacrylate emulsion and a preparation method thereof. Background technique [0002] Traditional solvent-based polyurethane coatings have been widely used in automotive, industrial, and heavy-duty anti-corrosion fields due to their excellent comprehensive properties. In recent years, with the continuous improvement of people's environmental awareness and the stricter restrictions on volatile organic compounds (VOC / TVOC) and harmful air pollutants (HAPs) in environmental regulations, waterborne two-component polyurethane coatings have become solvent-based systems. A class of replacement products. Since the early 1990s, Jacobs has successfully developed a polyisocyanate curing agent that can be dispersed in water, so that two-component waterborne polyurethane coatings have really entered the stage of practical application research. The two-component water-based poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/28C08F220/22C08F230/08C08F2/24C09D175/04
Inventor 赵志辉
Owner 泰兴市华盛银洋新材料科技有限公司
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