Aspartate resin of novel structure, polyurea coating as well as preparation method and application of polyurea coating

A technology of aspartic acid ester and new structure, which is applied in the direction of polyurea/polyurethane coating, organic compound preparation, cyanide reaction preparation, etc., and can solve the problems that are not conducive to improving the hardness of the coating film

Active Publication Date: 2019-06-21
郁维铭 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyoxyethylene ether or the ether bond in the polyoxypropylene ether structure of the main chain of the skeleton has soft characteristics, which only helps to improve the elasticity of the coating film and is not conducive to improving the hardness of the coating film.

Method used

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  • Aspartate resin of novel structure, polyurea coating as well as preparation method and application of polyurea coating
  • Aspartate resin of novel structure, polyurea coating as well as preparation method and application of polyurea coating
  • Aspartate resin of novel structure, polyurea coating as well as preparation method and application of polyurea coating

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] Preparation of Example 1E1

[0064] In a 500ml four-necked flask equipped with electric stirring, thermometer, dropping funnel, nitrogen conduit and reflux condenser respectively, add 0.5mol (105.2g) of 4,4'-diamino-dicyclohexylmethane, and then add 0.25 g2,4,6-tris(dimethylaminomethyl)phenol. Start stirring, blow nitrogen and slowly heat up to 40-45°C, start to drop 0.6mol (103.3g) diethyl maleate, control the temperature not to exceed 60°C and keep the dropwise addition within 30-40 minutes, and then React in the range of 60-65°C for 4 hours. Cool down to about 45°C, start to add 0.4mol (40.05g) methyl methacrylate dropwise, control the temperature not to exceed 60°C and keep the dropwise addition within 30-40 minutes. Then continue to react in the range of 60-65°C for 10 hours, cool down to 40°C and discharge to obtain the product E1. The product is a light yellow transparent liquid, and the conversion rate measured by the "iodination method" is 86% at this time, ...

Embodiment 2

[0067] The preparation of embodiment 2 E2

[0068] In a 500ml four-necked flask equipped with electric stirring, thermometer, dropping funnel, nitrogen conduit and reflux condenser respectively, add 0.5mol (105.2g) of 4,4'-diamino-dicyclohexylmethane, and then add 0.27 g2,4,6-tris(dimethylaminomethyl)phenol. Start stirring, blow nitrogen and slowly heat up to 40-45°C, start to drop 0.6mol (103.3g) diethyl maleate, control the temperature not to exceed 60°C and keep the dropwise addition within 30-40 minutes, and then React in the range of 60-65°C for 4 hours. Cool down to about 45°C, start to add 0.4mol (45.7g) ethyl methacrylate dropwise, control the temperature not to exceed 60°C and keep the dropwise addition within 30-40 minutes. Then continue to react in the range of 60-65°C for 10 hours, cool down to 40°C and discharge to obtain product E2. The product is a light yellow transparent liquid, and the conversion rate measured by the "iodination method" is 84% ​​at this ti...

Embodiment 3

[0071] The preparation of embodiment 3 E3

[0072]In a 500ml four-necked flask equipped with electric stirring, thermometer, dropping funnel, nitrogen conduit and reflux condenser respectively, add 0.5mol (105.2g) of 4,4'-diamino-dicyclohexylmethane, and then add 0.25 g2,4,6-tris(dimethylaminomethyl)phenol. Start stirring, blow nitrogen and slowly heat up to 40-45°C, start to drop 0.6mol (103.3g) diethyl maleate, control the temperature not to exceed 60°C and keep the dropwise addition within 30-40 minutes, and then React in the range of 60-65°C for 4 hours. Cool down to about 45°C, start to add 0.4mol (40.0g) ethyl acrylate dropwise, control the temperature not to exceed 60°C and keep the dropwise addition within 30-40 minutes. Then continue to react in the range of 60-65°C for 10 hours, cool down to 40°C and discharge to obtain the product E3. The product is a light yellow transparent liquid, and the conversion rate measured by the "iodination method" is 86% at this time,...

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Abstract

The invention provides aspartate resin of a novel structure and a preparation method of a polyurea coating containing the aspartate resin. According to a synthesis method of the aspartate resin of thenovel structure, unsaturated binary carboxylic ester and unsaturated monocarboxylic ester are used in the aspartate resin of the novel structure to have a Michael addition reaction with a primary amino compound, wherein the unsaturated binary carboxylic ester is alkyl acrylate or alkyl methacrylate. The novel polyurea coating is characterized in that the coating is cured and formed at the room temperature in a form of double components, wherein the component A is a common isocyanate curing agent, and the component B is a mixture at least containing the aspartate resin of the novel structure,which is prepared according to claim 3 or 4. Acrylate (methacrylate) with a smaller space volume is introduced into one end of a molecular chain, the internal plasticization effect after the coating is cured is reduced, and the hardness of the coating is increased.

Description

technical field [0001] The invention provides a new structure of aspartic acid ester resin and its preparation method, and the polyurea coating prepared by using the new structure of aspartic acid ester resin. 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. This is due to the fact that this polyurea coating can be quickly cured at low temperature or even room temperature, and the surface properties, mechanical properties and durability of the paint film The chemical corrosion performance exceeds or is equi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/14C07C227/16C08G18/32C09D175/02
Inventor 郁维铭
Owner 郁维铭
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