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Hydroxyl acrylic emulsion and preparation method and use method thereof

A technology of hydroxyacrylic acid and methyl methacrylate, which is applied in the field of hydroxyacrylic acid emulsion and its preparation, can solve the problems of poor mechanical stability and chemical stability, insufficient crosslinking density of the paint film, and difficulty in increasing the solid content, and achieve glossiness and high hardness, less aggregate content, and narrow particle size distribution

Inactive Publication Date: 2020-12-29
深圳前海飞扬化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low hydroxyl content of the hydroxyacrylic emulsion, it is difficult to increase the solid content and the particle size is generally large, the mechanical stability and chemical stability are poor, and the curing agent cannot be well emulsified and dispersed, resulting in insufficient crosslinking density of the paint film. Disadvantages of low gloss and poor performance

Method used

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  • Hydroxyl acrylic emulsion and preparation method and use method thereof
  • Hydroxyl acrylic emulsion and preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A hydroxyacrylic acid emulsion, comprising hydroxyacrylic acid particles, the hydroxyacrylic acid particles comprising a hard shell and a seed emulsion wrapped in the hard shell; the seed emulsion is an emulsified suspension containing a hydroxyacrylic acid structure, and the hard shell is A shell containing a hydroxyacrylic structure; the shell is also decorated with a water-based UV resin structure.

[0024] The hydroxyacrylic acid emulsion is formed by reacting the following materials in parts by weight: 100-200 parts of deionized water, 30-80 parts of methyl methacrylate, 15-70 parts of butyl acrylate, 1-20 parts of hydroxyacrylic acid Monomer, 0.5-5 parts of unsaturated carboxylic acid, 1-6 parts of functional monomer, 0.2-3 parts of emulsifier, 1-10 parts of water-based UV monomer, 0.3-2 parts of ammonium persulfate, 0.1 -0.8 part of sodium bicarbonate, 0.1-1 part of 3-mercapto butyl propionate, 0.3-1 part of diethylhydroxylamine and 0.1-0.5 part of asymmetric hin...

Embodiment 2

[0026] On the basis of Example 1, the hydroxyacrylic acid monomer is One or more of them, among them, R 1 -H or -CH 3 , R 2 for no 1 The value range is 1-10, n 2 The value range is 1-10, R 3 -H or -CH 3 .

[0027] The water-based UV monomer is a non-ionic self-emulsifying polyurethane modified UV resin with a functionality of 2-6.

[0028] The unsaturated carboxylic acid is one or more of acrylic acid, methacrylic acid, maleic acid and itaconic acid.

[0029] The functional monomer is one or more of trifluoroethanol methacrylate, triethoxysilane tetrafluoropropyl methacrylate, hexafluorobutyl methacrylate, and vinyltriethoxysilane.

[0030] The emulsifier is sodium dodecylbenzenesulfonate, sodium dodecylsulfonate, sodium polyoxyethylene ether sulfate, sodium dodecylbenzene diphenyl ether sulfonate, 2-acrylamide-2 methylpropane One or more of sodium sulfonate and alkylphenol polyoxyethylene ether.

[0031] The asymmetric hindered phenol antioxidant is BASF anti...

Embodiment 3

[0033] The preparation method of the hydroxyacrylic acid emulsion in above-mentioned embodiment 1-2, comprises the following steps:

[0034] S1: Prepare deionized water, methyl methacrylate, butyl acrylate, hydroxyacrylic acid monomer, unsaturated carboxylic acid, functional monomer, emulsifier, water-based UV monomer, ammonium persulfate, sodium bicarbonate, 3 -Butyl mercaptopropionate, diethylhydroxylamine and asymmetric hindered phenol antioxidants.

[0035] S2: 60-70% deionized water, 30-50% methyl methacrylate, 50-70% butyl acrylate, 25-45% hydroxyacrylic acid monomer, 30% -50% functional monomer, 30-70% emulsifier, 30-50% ammonium persulfate, 100% sodium bicarbonate and 100% butyl 3-mercaptopropionate, heat up to 50-70°C React for 2-4h to obtain seed emulsion.

[0036] S3: Prepare A solution with the remaining ammonium persulfate and the remaining deionized water; prepare the remaining methyl methacrylate, butyl acrylate, hydroxyl acrylic acid monomer, functional monom...

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Abstract

The invention provides a hydroxy acrylic emulsion and a preparation method and a use method thereof. The hydroxy acrylic emulsion comprises hydroxy acrylic particles; the hydroxy acrylic particle comprises a hard shell and a seed emulsion wrapped in the hard shell; and the seed emulsion is an emulsified suspension containing a hydroxyl acrylic acid structure, and the hard shell is a shell containing the hydroxyl acrylic acid structure; and the shell is also modified with a water-based UV resin structure. The hydroxyl acrylic acid particles in the hydroxyl acrylic acid emulsion have soft core seed emulsion, and the hard shell contains hydroxyl and carboxyl, so that the hardness is ensured, the lowest film forming temperature is remarkably reduced, and the film can be easily formed at room temperature; the prepared film is high in glossiness and hardness, good in flexibility, high in adhesive force and resistant to impact; and the hydroxyl acrylic emulsion is high in solid content, low in condensate content, narrow in particle size distribution and high in stability.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a hydroxyacrylic acid emulsion, a preparation method and a use method thereof. Background technique [0002] As people's requirements for environmental protection are increasingly strengthened, solvent-based coatings are restricted, and water-based environmentally friendly coatings are vigorously developed. The water-based hydroxyacrylic resin coating has become a hotspot in the development because of its advantages of both polyurethane and acrylic resin, and has been widely used in industrial production and people's life. However, due to the low hydroxyl content of the hydroxyacrylic emulsion, it is difficult to increase the solid content and the particle size is generally large, the mechanical stability and chemical stability are poor, and the curing agent cannot be well emulsified and dispersed, resulting in insufficient crosslinking density of the paint film. Th...

Claims

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Application Information

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IPC IPC(8): C08F265/06C08F220/14C08F220/18C08F220/28C08F220/22C08F220/06C08F283/00C08F230/08C08F220/58C08F222/02C08F220/24C08F2/26C08F2/30C09D151/00C09D151/08C09D7/63
CPCC08F265/06C08F283/008C08F2/26C08F2/30C09D151/003C09D151/08C09D7/63
Inventor 龙绪俭许超平鲁晓东李斌仁熊东路肖增钧杨轩陈林生
Owner 深圳前海飞扬化工有限公司
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