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High thixotropic polyurethane acrylate aqueous dispersion and preparation method thereof

A polyurethane acrylate, dispersion technology, applied in the direction of coating, etc., to achieve the effect of stable performance and high thixotropy

Inactive Publication Date: 2021-12-24
上海金仕迈树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • High thixotropic polyurethane acrylate aqueous dispersion and preparation method thereof
  • High thixotropic polyurethane acrylate aqueous dispersion and preparation method thereof
  • High thixotropic polyurethane acrylate aqueous dispersion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Add 82.4 g of diethylenetriamine to a 500 mL four-necked flask equipped with a stirring device and a thermometer, raise the temperature to 80° C., and then drop 198 g of polypropylene glycol glycidyl ether into the four-necked flask within 2 hours. After the dropwise addition is completed, the temperature is kept at 80° C. for 1 hour, and then the temperature is raised to 120° C. for 1 hour. After the heat preservation, the temperature was lowered to 80° C., 56.5 g of deionized water was added and stirred for 10 minutes, then the temperature was lowered, and the material was discharged to obtain the epoxy-modified amine compound A3.

Embodiment 2

[0063] Add 92.8 g of dimethylpentamethylenediamine to a 500 mL four-necked flask equipped with a stirring device and a thermometer, raise the temperature to 50° C., and then drop 120 g of polyethylene glycol glycidyl ether into the four-necked flask within 2 hours. After the dropwise addition was completed, the temperature was maintained at 60° C. for 3 hours, and then 42.6 g of deionized water was added, and the temperature was raised to 90° C. for 1 hour. After the heat preservation is completed, the temperature is lowered, and the material is discharged to prepare the epoxy-modified amine compound A4.

Embodiment 3

[0065] Add 72 g of ethylenediamine to a 500 mL four-necked flask equipped with a stirring device and a thermometer, raise the temperature to 50° C., and then drop 300 g of polypropylene glycol glycidyl ether into the four-necked flask within 2 hours. After the dropwise addition was completed, the temperature was maintained at 60° C. for 3 hours, and then 42.6 g of deionized water was added, and the temperature was raised to 90° C. for 1 hour. After the heat preservation is completed, the temperature is lowered, and the material is discharged to prepare the epoxy-modified amine compound A5.

[0066] Preparation of High Thixotropic Polyurethane Acrylate Aqueous Dispersion

[0067] Example 1

[0068] 1) Preparation of mixed solution I: Add 67.74g of (meth)acrylate, 0.053g of dibutylhydroxytoluene, and 0.062g of p-hydroxyanisole into a 100mL beaker in sequence, then stir and mix evenly with a glass rod, and set aside;

[0069] 2) Preparation of mixed solution II: Add 4.49g of di...

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Abstract

The invention relates to a high thixotropic aqueous polyurethane acrylate dispersion. Polymeric polyol, isocyanate, a hydroxy acid compound and a hydroxyl compound are used as raw materials to prepare a polyurethane prepolymer, olefinic monomers such as (methyl) acrylate and vinyl are introduced after cooling, neutralization, chain extension and water dispersion, polymerization of the olefinic monomers is further initiated under the action of the redox initiation system, and the high thixotropic aqueous polyurethane acrylate dispersion is prepared. The aqueous dispersion provided by the invention shows more stable performance, has higher thixotropy when being applied to a coating, and is better in storage stability and fineness while the construction performance of the coating can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, and in particular relates to a high-thixotropic polyurethane acrylate water-based dispersion and a preparation method thereof. [0002] technical background [0003] As an important branch of the chemical industry, coatings have been widely used in various fields of human production and life. At present, most of the coatings on the market are solvent-based coatings. The preparation process requires a large amount of organic solvents. The film-forming process produces a large amount of VOC (volatile organic compounds), which not only pollutes the environment but also affects people's health. It does not conform to the current environmental protection concept. Compared with solvent-based coatings, water-based coatings have less pollution, low VOC content, non-toxic and safer. [0004] Water-based resin is one of the main materials of water-based coatings. The structure of water-based p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D7/20C08F283/00C08F220/18
CPCC09D151/08C09D7/20C08F283/008C08F220/1808
Inventor 黄胜王晓杰张子健吴纯超
Owner 上海金仕迈树脂有限公司
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