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Preparation method of low-temperature curing type waterborne amino acrylic resin

An aminoacrylate, water-based technology used in coatings to achieve low curing temperature and enhanced scratch resistance

Inactive Publication Date: 2016-04-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems existing in the application of the existing water-based aminoacrylic acid to automotive coatings, and to provide a low-temperature curing water-based aminoacrylic resin automotive coating

Method used

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  • Preparation method of low-temperature curing type waterborne amino acrylic resin
  • Preparation method of low-temperature curing type waterborne amino acrylic resin
  • Preparation method of low-temperature curing type waterborne amino acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] During the above esterification reaction, the molar ratio of acrylic acid and melamine formaldehyde resin was 1:1, the esterification reaction temperature was 110° C., and the reaction time was 1 h.

[0037] During the polymerization process, the amount of the aminoacrylic ester macromer is 4 parts; the amount of the methyl methacrylate is 5 parts; the amount of the isooctyl methacrylate is 30 parts; the tertiary carbonic acid The vinyl ester consumption is 30 parts; the described butyl acrylate consumption is 2 parts; the described α-methacrylic acid consumption is 3 parts; the described sodium bicarbonate consumption is 0.5 parts; the described ammonium persulfate consumption is 0.5 part; The described tert-butyl hydroperoxide consumption is 0.1 part; The described sodium bisulfoxylate formaldehyde consumption is 0.1 part; The emulsifier in the described emulsion polymerization is SR-10, and the consumption is 3 parts; The amount of deionized water used in the emulsio...

Embodiment 2

[0041] During the above esterification reaction, the molar ratio of acrylic acid and melamine formaldehyde resin was 1.2:1, the esterification reaction temperature was 130° C., and the reaction time was 3 hours.

[0042]During the polymerization process, the amount of the aminoacrylic ester macromer is 8 parts; the amount of the methyl methacrylate is 13 parts; the amount of the isooctyl methacrylate is 50 parts; the tertiary carbonic acid The consumption of vinyl ester is 50 parts; The consumption of described butyl acrylate is 5 parts; The consumption of described α-methacrylic acid is 5 parts; The consumption of described sodium bicarbonate is 0.7 part; The consumption of described ammonium persulfate is 0.7 part; The described tert-butyl hydroperoxide consumption is 0.3 part; The described sodium bisulfoxylate formaldehyde consumption is 0.3 part; The emulsifier in the described emulsion polymerization is SR-10, and the consumption is 5 parts; The amount of deionized water...

Embodiment 3

[0046] During the above esterification reaction, the molar ratio of acrylic acid and melamine formaldehyde resin was 1.12:1, the esterification reaction temperature was 115°C, and the reaction time was 1.3h.

[0047] During the polymerization process, the amount of the aminoacrylic ester macromonomer is 5 parts; the amount of the methyl methacrylate is 6 parts; the amount of the isooctyl methacrylate is 32 parts; the tertiary carbonic acid The consumption of vinyl ester is 32 parts; The consumption of described butyl acrylate is 2.5 parts; The consumption of described α-methacrylic acid is 3.3 parts; The consumption of described sodium bicarbonate is 0.53 parts; The consumption of described ammonium persulfate is 0.53 part; The described tert-butyl hydroperoxide consumption is 0.12 part; The described sodium bisulfite formaldehyde consumption is 0.12 part; The emulsifier in the described emulsion polymerization is SR-10, and the consumption is 3.3 parts; The amount of deionize...

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Abstract

The invention discloses a preparation method of low-temperature curing type waterborne amino acrylic resin. The preparation method comprises the following steps of performing esterification reaction on melamine formaldehyde resin and acrylic acid to obtain an amino acrylic ester macromonomer; mixing the amino acrylic ester macromonomer into an acrylic monomer emulsion, and polymerizing to obtain a polyamino acrylic ester emulsion; mixing the polyamino acrylic ester emulsion and water-soluble blocked isocyanate, so as to prepare the low-temperature curing type waterborne amino acrylic resin. The preparation method has the advantages that the melamine formaldehyde resin is mixed into the acrylic acid to prepare the amino acrylic ester, and multiple types of acrylic ester are mixed into the amino acrylic ester, so that the properties of the emulsion and a rubber film are improved, the anti-scratching and anti-corrosive properties of a coating film are improved, and the service life of the coating film is prolonged; after the isocyanate which is blocked by sodium bisulfite is used, the self disadvantages are overcome by the advantages of the isocyanate and the acrylic ester, and the coating film has the water-proof, anti-aging and anti-corrosive properties of the amino acrylic ester, and also has the property of low curing temperature of the isocyanate.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method of low-temperature curing water-based aminoacrylic resin. Background technique [0002] Domestic and foreign automotive coatings are mainly solvent-based coatings. A large number of volatile organic compounds in these systems will not only cause serious pollution to the environment, but also cause harm to the human body. At the same time, these organic compounds volatilized into the air are also harmful to resources. a serious waste. It is the general trend for automotive coatings to develop in the direction of water-based, high-solids and powder coatings. Therefore, in order to meet the requirements of environmental protection and reduce the emission of volatile organic compounds (VOC), it is necessary to water-based automotive coatings. [0003] One of the water-based paints commonly used in automobile painting is amino resin and acrylic resi...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F218/10C08F220/36C08F220/14C08F220/06C08G18/80C08G18/62C09D175/04C09D5/08
CPCC08F218/10C08F220/18C08F220/1808C08G18/6283C08G18/80C09D5/08C09D175/04C08F220/14C08F220/1804C08F220/06C08F220/36
Inventor 张良均王琪彭晨陈颖李欢
Owner WUHAN INSTITUTE OF TECHNOLOGY
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