Self-emulsified epoxy curing agent and reinforced varnish, and preparation method of self-emulsified epoxy curing agent and reinforced varnish

An epoxy curing agent, self-emulsifying technology, used in epoxy resin coatings, coatings, etc., can solve problems such as environmental and human health hazards, and achieve the effects of simplified process, good water resistance, and excellent adhesion

Inactive Publication Date: 2016-12-07
江苏丰彩建材(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because most of the traditional epoxy resin coatings are solvent-based, a large amount of organic solvents will be volatilized during production and construction, which will cause great harm to the environment and human health.

Method used

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  • Self-emulsified epoxy curing agent and reinforced varnish, and preparation method of self-emulsified epoxy curing agent and reinforced varnish

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add triethylenetetramine and phenyl glycidyl ether in a four-necked flask equipped with a nitrogen feed device, a reflux condenser, a thermometer and a stirrer, and the molar ratio of triethylenetetramine to phenyl glycidyl ether is 1:1 , and then reacted at 55°C for 6.5 hours to obtain a partially blocked amino epoxy adduct. Slowly drip epoxy resin E-51 in the above-mentioned partially blocked amino-based epoxy adduct, the mol ratio of partially blocked amino-based epoxy adduct and epoxy resin E-51 is 2:1.1, then in Reaction was carried out at 60°C for 8 hours to obtain an intermediate product. Add ethylene glycol diglycidyl ether dropwise to the above intermediate product, the molar ratio of the intermediate product to ethylene glycol diglycidyl ether is 2:0.6, carry out the addition reaction at 70°C for 3 hours, and the self-emulsifying type can be obtained Epoxy curing agent A.

[0031] According to the weight ratio of 1:0.5:1, it is taken from emulsified epoxy cu...

Embodiment 2

[0033] Add diethylenetriamine and phenyl glycidyl ether in a four-necked flask equipped with a nitrogen feed device, a reflux condenser, a thermometer and a stirrer, and the molar ratio of diethylenetriamine to phenyl glycidyl ether is 1:1.5 , and then reacted at 90°C for 2.5 hours to obtain a partially blocked amino epoxy adduct. Slowly drip epoxy resin E-51 in the above-mentioned partially blocked amino epoxy adduct, the mol ratio of partially blocked amino epoxy adduct and epoxy resin E-51 is 2:1.5, then in React at 80°C for 4 hours to obtain an intermediate product. Add butyl diglycidyl ether dropwise to the above intermediate product, the molar ratio of intermediate product to butyl diglycidyl ether is 2:0.8, and carry out addition reaction at 85°C for 4.5 hours to obtain self-emulsifying epoxy Curing agent B.

[0034] Take emulsified epoxy curing agent B, epoxy resin E-44, and water in a weight ratio of 1:1:2, mix them with water, and stir for 5 minutes at a speed of 5...

Embodiment 3

[0036] Add polyether amine (molecular weight is 230) and butyl glycidyl ether in the four-neck flask that nitrogen feeds device, reflux condenser, thermometer and stirrer are housed, the mol ratio of polyether amine and butyl glycidyl ether is 1:2.2, and then reacted at 80°C for 6 hours to obtain a partially blocked amino epoxy adduct. Slowly drip epoxy resin E-44 in the above-mentioned partially blocked amino-based epoxy adduct, the mol ratio of partially blocked amino-based epoxy adduct and epoxy resin E-44 is 2:1.8, then in The reaction was carried out at 65°C for 5.5 hours to obtain an intermediate product. Add propylene glycol diglycidyl ether dropwise to the above intermediate product, the molar ratio of the intermediate product to propylene glycol diglycidyl ether is 2:1.5, and carry out the addition reaction at 75°C for 5.5 hours to obtain a self-emulsifying epoxy curing agent c.

[0037] According to the weight ratio of 1:1.5:2.5, it is taken from emulsified epoxy c...

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Abstract

The invention relates to a preparation method of a self-emulsified epoxy curing agent, wherein the preparation method comprises the following steps: a first step, adding an amine component and single epoxy functionality glycidyl ether to a container having nitrogen protection, and carrying out a reaction for 2-8 h at the temperature of 50-105 DEG C, to obtain an end-capped amine epoxy addition product; a second step, dropwise adding epoxy resin into the end-capped amine epoxy addition product, and carrying out a reaction for 1-8 h at the temperature of 20-100 DEG C, to obtain an intermediate product; and a third step, dropwise adding small molecular diglycidyl ether into the intermediate product, and carrying out an addition reaction for 2-8 h at the temperature of 20-100 DEG C, to obtain the self-emulsified epoxy curing agent. The self-emulsified epoxy curing agent has more excellent application period and physical properties, has shorter surface drying time, and can make epoxy resin cured at room temperature to form a hard paint film.

Description

technical field [0001] The invention relates to a self-emulsifying epoxy curing agent, a reinforcing varnish and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Epoxy resin has the characteristics of high adhesion, excellent chemical resistance, high hardness, good wear resistance, excellent solvent resistance, good alkali resistance and salt spray resistance, etc. It is widely used in industry and has been used in machinery , electrical, electronic, chemical, transportation, aerospace, aviation, construction and other fields. However, because most of the traditional epoxy resin coatings are solvent-based, a large amount of organic solvents will be volatilized during production and construction, which will cause great harm to the environment and human health. With the increasing requirements for environmental protection, water-based epoxy resin is an inevitable trend in the development of coatings. Water-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C09D163/00C09D163/02
CPCC09D163/00C08G59/50
Inventor 沈志明朱殿奎李安宁李晴杨亚萍
Owner 江苏丰彩建材(集团)有限公司
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