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Hydrophobically modified acrylate emulsion and preparation method thereof

An acrylate and hydrophobic modification technology, applied in the direction of coating, etc., can solve the problems of low crosslinking density of the copolymer and the performance of the coating film cannot reach the optimal effect, etc. Excellent performance

Inactive Publication Date: 2019-03-01
中安瑞材(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the fluorine monomer and siloxane are polymerized with the acrylic monomer and then blended, resulting in a relatively low crosslinking density of the copolymer, and the final coating film performance cannot achieve the optimal effect, and the contact angle of the coating film can only reach around 110°

Method used

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  • Hydrophobically modified acrylate emulsion and preparation method thereof
  • Hydrophobically modified acrylate emulsion and preparation method thereof
  • Hydrophobically modified acrylate emulsion and preparation method thereof

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preparation example Construction

[0029] The embodiment of the present invention provides a method for preparing a hydrophobically modified acrylate emulsion, the method comprising:

[0030] Prepare the following raw materials in parts by weight:

[0031] .

[0032] The first pre-emulsion preparation step: take 25%-40% of the low-reactivity acrylic monomer, 50%-80% of the vinyl monomer, 30%-40% of the emulsifier, and 25% of the raw material -40% of the initiator is added to 25%-40% of the distilled water in the raw material, and after high-speed stirring, the first pre-emulsion is obtained.

[0033] Specifically, when the step of preparing the first pre-emulsion is carried out in a beaker or a flask, the rotation speed of the high-speed stirring in the step of preparing the first pre-emulsion may be 800-1000 r / min.

[0034] The second pre-emulsion preparation step: take the remaining low-reactivity acrylic monomer, the remaining vinyl monomer, the remaining emulsifier, the high-reactivity acrylic monomer, ...

Embodiment 1

[0065] Prepare the following raw materials in parts by weight:

[0066]

[0067]

[0068] Preparation steps of the first pre-emulsion: Take 25 parts of butyl acrylate, 9 parts of methyl methacrylate, 25 parts of styrene, 3 parts of SR-10, 0.3 part of ammonium persulfate, add 60 parts of distilled water, at 800r / min Stirring for 40min at a rotating speed of 1.0 to obtain the first pre-emulsified emulsion.

[0069] The second pre-emulsion preparation step: take the remaining 50 parts of butyl acrylate, 6 parts of methyl methacrylate, 15 parts of styrene, 5 parts of SR-10, 5 parts of acrylic acid, 7 parts of dodecafluoromethacrylate in the raw materials Heptyl ester, 8 parts of vinyl polydimethylsiloxane (viscosity 500cp), were added to 115 parts of distilled water, and stirred at a speed of 1200r / min for 40min to obtain the second pre-emulsion;

[0070] Initiator solution preparation steps: take the remaining 0.6 parts of ammonium persulfate in the raw material, add 5 par...

Embodiment 2

[0076] Prepare the following raw materials in parts by weight:

[0077]

[0078]

[0079] The first pre-emulsion preparation steps: take 15 parts of butyl acrylate, 9 parts of methyl methacrylate, 17 parts of styrene, 2 parts of sodium lauryl sulfate, 2 parts of nonylphenol polyoxyethylene ether, 0.3 parts of Add ammonium sulfate to 60 parts of distilled water, and stir for 30 minutes at a speed of 1000 r / min to obtain the first pre-emulsified emulsion.

[0080] The second pre-emulsion preparation step: take the remaining 75 parts of butyl acrylate, 3 parts of methyl methacrylate, 5 parts of styrene, 4 parts of sodium lauryl sulfate, and 4 parts of nonylphenol polyoxyethylene ether in the raw materials , 8 parts of acrylic acid, 10 parts of dodecafluoroheptyl methacrylate, 8 parts of vinyl polydimethylsiloxane (viscosity 800cp), add 145 parts of distilled water, and stir for 40min at a speed of 1200r / min to obtain the first Two pre-emulsions;

[0081] Initiator solutio...

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Abstract

The invention provides a hydrophobically modified acrylate emulsion and a preparation method thereof. The preparation method includes: preparing raw materials including, by weight, 70-120 parts of a low-reaction-activity acrylic monomer, 20-40 parts of a vinyl monomer, 5-10 parts of a high-reaction-activity acrylic monomer, 5-10 parts of a fluoro-monomer, 5-10 parts of a siloxane monomer, 5-15 parts of an emulsifier, 0.5-1.2 parts of an initiator and 130-230 parts of distilled water. The method includes: respectively preparing a first pre-emulsified liquid, a second pre-emulsified liquid and an initiator solution; preparing a core layer emulsion from the first pre-emulsified liquid; dropwise adding the second pre-emulsified liquid and the initiator solution to the first pre-emulsified liquid to prepare a core-shell emulsion; and regulating pH value to obtain the hydrophobically modified acrylate emulsion. The preparation method is suitable for industrial large-scale production; the hydrophobically modified acrylate emulsion is excellent in hydrophobicity and is more than 130 degrees in static water contact angle, so that the emulsion has excellent film-coating performance.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a hydrophobically modified acrylate emulsion and a preparation method thereof. Background technique [0002] Acrylate emulsions are often used in the field of coatings, such as construction, textile, wood, leather and other fields, because of their excellent properties of UV resistance, aging resistance, acid and alkali resistance, and corrosion resistance. However, the general acrylate emulsion has low water resistance. [0003] In the prior art, the preparation method of a relatively mature highly hydrophobic acrylate emulsion is: first carry out the emulsion free radical polymerization of the acrylate monomer and the hydrolysis condensation of the siloxane monomer, and then prepolymerize the polysiloxane Mix the aqueous solution with the fluorine-containing acrylate copolymer emulsion to obtain a highly hydrophobic acrylate emulsion. However, in this method, the fluorine mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F220/06C08F220/24C08F218/08C08F214/06C08F230/08C08F283/12C09D133/08C09D151/08
CPCC08F220/18C08F220/1804C08F283/124C09D143/04C09D151/085C08F220/14C08F212/08C08F220/06C08F220/24C08F230/08C08F220/22C08F218/08C08F214/06
Inventor 宋波苏成坤杨波
Owner 中安瑞材(北京)科技有限公司
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