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Double liquid crystal structure toughened epoxy resin water-proof paint and preparation method thereof

A technology of tough epoxy resin and epoxy resin, which is applied in the field of epoxy resin waterproof coating and its preparation, can solve the problems of complex process required to improve toughness and inability to effectively improve the toughness of epoxy resin, and achieve the effect of enhancing toughness

Active Publication Date: 2019-06-21
辽宁苏博特船牌制漆有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the existing liquid crystal unit modified epoxy resin cannot effectively improve the toughness of epoxy resin, and the problem that the process required to improve the toughness is relatively complicated, the present invention provides a double liquid crystal structure toughened epoxy resin waterproof coating and its Preparation

Method used

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  • Double liquid crystal structure toughened epoxy resin water-proof paint and preparation method thereof
  • Double liquid crystal structure toughened epoxy resin water-proof paint and preparation method thereof
  • Double liquid crystal structure toughened epoxy resin water-proof paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] (1) Dissolve 100g epoxy resin E44 in a flask containing 500g dichloromethane, add 8g dicyclohexylcarbodiimide and 2g 4-dimethylaminopyridine, stir for 10min, add 25g diphenyl liquid crystal base After the reaction for 8 hours, the liquid crystal cell modified epoxy resin A1 was separated using a chromatographic column and a mixed solvent of ethyl acetate and petroleum ether as the eluent. 100g epoxy resin E44 and 30g hydroxyl functional group fluorine chain extender Dissolve Z-DOL in a flask containing 500g of dichloromethane, add 1g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 1g of 4-dimethylaminopyridine, and stir After 10 minutes, 30g of 2H, 2H, 3H, 3H-perfluorononanoic acid was added and reacted at room temperature. After 24 hours of reaction, a chromatographic column and a mixed solvent of ethyl acetate and petroleum ether were used as the eluent to separate the fluorocarbon chain modified epoxy resin A2.

[0088] (2) In the beaker, add 40g cu...

Embodiment 2

[0099] (1) Dissolve 100g epoxy resin E51 in a flask containing 500g dichloromethane, add 6g 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 2g 4- Dimethylaminopyridine, after stirring for 10 minutes, add 14 g of diphenyl mesogen, and react at room temperature. After 8 hours of reaction, use a chromatographic column and a mixed solvent of ethyl acetate and petroleum ether as the eluent to separate the mesogen modified epoxy resin A1; 100g epoxy resin E51 and 45g hydroxyl functional group fluorine chain extender Z-DOL was dissolved in a flask containing 500g of dichloromethane, 6g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 2g of 4-dimethylaminopyridine were added and stirred After 10 minutes, 16g of perfluoroheptanoic acid was added and reacted at room temperature. After 24 hours of reaction, a chromatographic column and a mixed solvent of ethyl acetate and petroleum ether were used as the eluent to separate the fluorocarbon chain modified...

Embodiment 3

[0111] (1) Dissolve 100g epoxy resin E44 in a flask containing 500g dichloromethane, add 7g N,N'-diisopropylcarbodiimide and 2g 4-dimethylaminopyridine, stir for 10min, add 25g of biphenyl mesogen, react at room temperature. After 24 hours of reaction, use a chromatographic column and a mixed solvent of ethyl acetate and petroleum ether as the eluent to separate the mesogen modified epoxy resin A2; 100g epoxy resin E44 and 40g hydroxyl functional group fluorine chain extender Dissolve Z-DOL in a flask containing 500g of dichloromethane, add 7g of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 2g of 4-dimethylaminopyridine, and stir for 10 minutes Then, 20g of perfluoropentanoic acid was added and reacted at room temperature. After 8 hours of reaction, a chromatographic column and a mixed solvent of ethyl acetate and petroleum ether were used as the eluent to separate the fluorocarbon chain modified epoxy resin A1.

[0112] (2) In the beaker, add 40g curing agen...

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Abstract

The invention discloses double liquid crystal structure toughened epoxy resin water-proof paint and a preparation method of the water-proof paint. The double liquid crystal toughened epoxy resin hydrophobic paint comprises two kinds of liquid crystal modified epoxy resin at a mass ratio of 1:(0.1-0.5), wherein a biphenyl chain segment is introduced into a side chain of epoxy resin through an esterification reaction for one liquid crystal modified epoxy resin; and a fluorocarbon chain segment is introduced into a side chain of the epoxy resin through the esterification reaction for the other liquid crystal modified epoxy resin. When the double liquid crystal toughened epoxy resin hydrophobic paint is cured at room temperature, liquid crystal structures are formed in and on the surface of acoating; and the paint becomes a protective coating with functions of water resistance, corrosion protection, wear resistance, ageing resistance, cracking resistance and the like.

Description

Technical field [0001] The invention relates to a double liquid crystal toughened epoxy resin waterproof coating and a preparation method thereof, and belongs to the technical field of building waterproof and protective coatings. Background technique [0002] With the large-scale development of my country's rail transit engineering construction, builders have increasingly realized the importance of waterproof coatings. The quality of waterproofing directly affects the usability, durability and safety of rail transit. This requires coatings to have good waterproof performance to extend the service life, reduce costs, and ensure the long-term safety of rail transit. [0003] However, it is undeniable that with the increase in service life, the coatings of rail transit projects tend to crack and peel. The reason is that the support elements are removed prematurely, the temperature difference between the construction and service environment is large, vibration and tremor and other fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C08G59/14
Inventor 候平平孙德文张小冬李波尹浩
Owner 辽宁苏博特船牌制漆有限公司
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