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Water-dispersible polyaspartic ester resin, preparation method of waterborne polyurea coating and application

An aspartic acid ester and dispersion technology, which is applied in the direction of polyurea/polyurethane coating, organic compound preparation, cyanide reaction preparation, etc., can solve the problems of increasing difficulty and cost, and achieve good compatibility, low viscosity, The effect of high storage stability

Active Publication Date: 2019-05-17
郁维铭 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the preparation process of the prepolymer requires several times excess isocyanate, and finally the excess isocyanate is separated
This adds a lot of difficulty and cost to the actual production process

Method used

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  • Water-dispersible polyaspartic ester resin, preparation method of waterborne polyurea coating and application
  • Water-dispersible polyaspartic ester resin, preparation method of waterborne polyurea coating and application
  • Water-dispersible polyaspartic ester resin, preparation method of waterborne polyurea coating and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0068] The synthesis of embodiment 4 resin E4

[0069] In the 500ml four-neck flask that electric stirrer, thermometer, dropping funnel, nitrogen conduit and reflux condenser are respectively housed, add 0.8mol (137.7g) diethyl maleate and 0.2mol (17.2g) methacrylic acid, After mixing evenly, add an appropriate amount of dimethylformamide (DMF) to make the pH of the mixture between 6-7. Another 0.27 g of 2,4,6-tris(dimethylaminomethyl)phenol was added. Start stirring, blow nitrogen and slowly raise the temperature to 45-50°C, start to drop 0.5mol (119g) 3,3'-dimethyl-4,4'-diamino-dicyclohexylmethane, control the temperature not to exceed 60 ℃ and kept at 40-60 minutes to complete the dropwise addition, and then reacted in the range of 60-65℃ for 12 hours. Cool down to 40°C and discharge to obtain product E4. The product is a light yellow transparent liquid, and the chromaticity (Pt-Co) is 26#. At this time, the conversion rate is 85% according to the "iodination method", an...

Embodiment 5

[0072] The preparation of embodiment 5 polyaspartate aqueous dispersion 1

[0073] Get the water dispersible polyaspartate resin (E1) 100g that makes in above-mentioned embodiment 1, stir

[0074]Slowly add 22 g of 25% dimethylformamide (DMF) aqueous solution under state (400 rpm) and keep a constant rotation speed (300-500 rpm) for 25 minutes. Then slowly add 83.5g deionized water, increase the speed to 3000rpm, and keep it for 15 minutes; then use 25% DMF aqueous solution to adjust the pH value in the range of 8.5-9.0 to obtain polyaspartic acid ester with 50% solid content Water Dispersion 1.

Embodiment 6

[0075] Embodiment 6 (water dispersion 2-4 preparation)

[0076] The aqueous dispersions of resins E2, E3, and E4 in Example 2-Example 4 were prepared respectively by the same steps as Example 5, and the corresponding formula data are shown in Table 1. The index data related to each dispersion is also listed in Table 1 (the weight unit is g respectively).

[0077] Table 1 Formulation and index data table of each dispersion

[0078]

[0079]

[0080] Note: The model of the nanoparticle size analyzer used is Winner800 (Jinan Micro-nano Particle Instrument Co., Ltd.) and the model of the high-speed centrifuge used is LG10-2.4A (Beijing Leiboer)

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PUM

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Abstract

The invention relates to polyaspartic ester resin and in particular relates to water-dispersible polyaspartic ester resin, a preparation method of waterborne polyurea coating and application. Water-dispersible polyaspartic ester is obtained by carrying out Michael addition reaction on unsaturated binary carboxylate, unsaturated monocarboxylic acid and a primary amino compound under the action of acatalyst and a neutralizing agent; a coating film of the double-component waterborne polyurea coating is obtained by utilizing a water dispersion body of the water-dispersible polyaspartic ester; theperformance keeps main properties of solvent type polyurea coating, such as rapid curing at room temperature, high glossiness, high transparency, good water resistance, corrosion resistance, ultraviolet resistance and ageing resistance.

Description

technical field [0001] The present invention relates to aspartic acid ester resin, particularly relate to a kind of aspartic acid ester resin of new structure and its preparation method, and utilize the polyurea coating that the aspartic acid ester resin of this new structure prepares Background technique [0002] The use of polyaspartic acid esters to prepare polyurea coatings has a history of nearly ten years. This kind of polyurea coating has excellent aging resistance, UV resistance, excellent wear resistance and waterproof performance. It was mainly used in the waterproof surface coating of industrial floors, outdoor road paving, swimming pools and water parks in the early days. In recent years, polyaspartic ester polyurea coatings have also begun to be used in the field of industrial coatings. On the one hand, this polyurea coating can be cured quickly at low temperature or even room temperature, and the optical properties, mechanical properties and durability of the p...

Claims

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Application Information

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IPC IPC(8): C07C229/24C07C227/10C08G18/32C09D175/02
Inventor 郁维铭
Owner 郁维铭
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