High-adhesion aqueous thermosetting acrylic resin, preparation method and applications thereof

An acrylic resin, high adhesion technology, applied in the direction of coating, etc., can solve the problems of poor gloss and water resistance of the final product, limit the application of emulsion, etc., achieve excellent protection performance, improve comprehensive performance, and low raw material cost

Active Publication Date: 2016-12-21
FOSHAN KINNO METAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, emulsifiers must be used in the emulsion polymerization method, which makes the gloss and water resistance of the final product worse, and these shortcomings limit the application of emulsions

Method used

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  • High-adhesion aqueous thermosetting acrylic resin, preparation method and applications thereof
  • High-adhesion aqueous thermosetting acrylic resin, preparation method and applications thereof
  • High-adhesion aqueous thermosetting acrylic resin, preparation method and applications thereof

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preparation example Construction

[0043] The preparation method includes the following steps:

[0044] (1) Add alcohol ether solvent to a four-necked flask equipped with a stirring blade, thermometer and condenser, and raise the temperature to 80-200℃; the reaction temperature is 80-200℃, preferably 80-150℃. The specific temperature depends on the It depends on the type of initiator.

[0045] (2) Mix all reactive monomers and initiators, stir to make the mixture uniform;

[0046] (3) Divide the mixed solution in step (2) into two parts A and B, where the volume ratio of A:B is (1-9):1;

[0047] (4) Put part A into the dripping device, and finish the dripping at a constant rate within 2-5 hours. After the dripping of part A is finished, then drip part B, and add the silane coupling agent to the solution of part B , The dripping is completed within 0.5-2 hours; after the dripping is completed, increase the temperature by 5-10℃ and keep it for 2 hours;

[0048] (5) Reduce the temperature to 70°C or below, add organic ami...

Embodiment 1

[0050] Add 20 g of ethanol and 40 g of propylene glycol butyl ether into a reaction device equipped with a stirring blade, a thermometer and a reflux condenser, and heat to 90°C. Mix 20 g of methyl methacrylate, 28 g of butyl acrylate, 20 g of isooctyl acrylate, 5 g of acrylic acid, 7 g of hydroxyethyl methacrylate, 20 g of E styrene, 3 g of initiator azobisisobutyronitrile, and divide them into A. , B is two components, the mass ratio of the two components is A:B=2:1, after the A component is dripped in 3 hours, add the silane coupling agent 5g vinyl trimethoxysilane to the B component within 1 hour After the dropwise addition is completed, after the reaction, the temperature is increased to 100°C and kept for 2 hours. After the temperature is lowered to 70°C, 4.5g of N,N-dimethylethanolamine is added to neutralize, and the material is discharged after stirring for 20 minutes to obtain the finished product.

Embodiment 2

[0052] Add 20 g of butanol and 40 g of propylene glycol butyl ether to a reaction device equipped with a stirring blade, a thermometer and a reflux condenser, and heat to 130°C. Combine 28 g of methyl methacrylate, 28 g of butyl acrylate, 9 g of acrylic acid, 15 g of hydroxyethyl methacrylate, 20 g of styrene, and 3 g of di-tert-butyl peroxide as the initiator. After mixing them, they are divided into two components A and B. The mass ratio of the components is A:B=3:1. After the A component has been dripped in 3 hours, add 3g of the silane coupling agent, 3-(2,3-epoxypropoxy)propyltrimethyl to the B component The oxysilane was added dropwise within 1 hour. After the reaction, the temperature was raised to 135°C and kept for 2 hours. After the temperature was lowered to 70°C, 9g of organic amine was added for neutralization. After stirring for 20 minutes, the material was discharged to obtain the finished product.

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Abstract

The invention discloses a high-adhesion aqueous thermosetting acrylic resin, a preparation method and applications thereof. According to the present invention, a reaction monomer is modified with a silane coupling agent, a polymerization reaction is performed in an alcohol ether type solvent medium under the effect of an initiator, and neutralization salification is performed with an organic amine to prepare the acrylic resin, wherein the reaction monomer comprises, by mass, 0-30% of methyl propiolate, 0-30% of acrylic acid ester, 5-18% of (methyl) hydroxyalkyl acrylate, 1-10% of unsaturated carboxylic acid, and 0-20% of a vinyl aromatic compound. According to the present invention, the prepared acrylic resin coating material has excellent adhesion to the aluminum material, the paint film has characteristics of high luster, good fullness and high strength, and the excellent protection performance and the excellent decorative effect can be provided for the high-grade aluminum material.

Description

Technical field [0001] The invention relates to the field of coatings, and more specifically, to a high-adhesion water-based thermosetting acrylic resin and a preparation method and application thereof. Background technique [0002] Aluminum and its alloys have good corrosion resistance, electrical and thermal conductivity, and easy processing and forming. Therefore, aluminum alloys are widely used in defense, aerospace, transportation, instruments, machinery and electronic devices, home decoration and other fields. Due to the chemical nature of metal aluminum and its liveliness, it is easily oxidized and darkened when exposed to the air, which affects the appearance and service life. Therefore, it is necessary to take measures to protect and decorate aluminum alloy workpieces. [0003] In the industry, oil-based paints and powder coatings are usually applied to the surface of aluminum profiles for protection and decoration. However, oil-based paints often release toxic and harmful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F220/28C08F212/08C08F230/08C08F2/06C09D133/08C09D133/12
CPCC09D133/08C09D133/12C08F2/06C08F220/14C08F220/18C08F220/1804C08F220/1808C08F220/06C08F220/281C08F212/08C08F230/08
Inventor 曹展鑫杨静波
Owner FOSHAN KINNO METAL TECH
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