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VOC (Volatile Organic Compounds)-free water-based epoxy curing agent

A water-based epoxy and curing agent technology, applied in epoxy resin coatings, coatings, etc., can solve the problems of complex preparation process of curing agent, short storage period of curing agent, difficult to control the reaction, etc., to achieve strong adhesion and corrosion resistance Excellent performance and fast drying effect

Active Publication Date: 2014-05-14
浙江纳宝莱化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of the prior art, the present invention provides a zero-VOC water-based epoxy curing agent. The curing agent does not contain a solvent and is obtained through a certain preparation method, which overcomes the complicated preparation process of the existing curing agent, the reaction is difficult to control, and is easy to Gel, the viscosity of the reactant is high during the preparation process, some co-solvents need to be added, the storage period of the curing agent is short, and the phenomenon of instability occurs after mixing with pigments and fillers

Method used

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  • VOC (Volatile Organic Compounds)-free water-based epoxy curing agent
  • VOC (Volatile Organic Compounds)-free water-based epoxy curing agent
  • VOC (Volatile Organic Compounds)-free water-based epoxy curing agent

Examples

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Embodiment 1

[0034] Embodiment 1: the preparation of waterborne epoxy resin curing agent 1

[0035] Add 51.6g CYD-115 and 116g polypropylene glycol diglycidyl ether in a 500ml four-neck flask in an oil bath device with a stirrer, thermocouple, condenser and constant pressure dropping funnel, and feed N 2While heating to 100°C, slowly add 20g of ED-600 dropwise. After the dropwise addition, heat to 150°C and keep it warm for about 4 hours until the amino reaction is complete. Finally, cool to room temperature to obtain a light yellow transparent intermediate with an epoxy value of 0.292mol / 100g . Then add 74.4g diethylenetriamine in the same device, while feeding N 2 While heating to 80°C, slowly add 170g of the intermediate dropwise. After the dropwise addition, keep it warm for about 4 hours until the epoxy group is completely reacted, and then distill under reduced pressure to remove the excess amine to obtain the adduct; In the dispersing cylinder, after passing circulating water at 9...

Embodiment 2

[0038] Embodiment 2: the preparation of waterborne epoxy resin curing agent 2

[0039] Add 39.2g CYD-127 and 78g polypropylene glycol diglycidyl ether in a 500ml four-necked flask in an oil bath device with a stirrer, thermocouple, condenser and constant pressure dropping funnel, and feed N 2 While heating to 110°C, slowly add 14g of ED-600 dropwise. After the dropwise addition, heat to 160°C and keep it warm for about 4 hours until the amino reaction is complete. Finally, cool to room temperature to obtain a light yellow transparent intermediate with an epoxy value of 0.289mol / 100g. Then add 51.6g triethylenetetramine in the same device, while feeding N 2 While heating to 80°C, slowly add 110g of the intermediate dropwise. After the dropwise addition, keep it warm for about 5 hours until the epoxy group reacts completely, and then distill under reduced pressure to remove the excess amine to obtain the adduct; In the dispersing cylinder, after passing circulating water at 8...

Embodiment 3

[0043] Embodiment 3: the preparation of waterborne epoxy resin curing agent 3

[0044] Add 57g CYD-115c and 116g polyethylene glycol diglycidyl ether in the 500ml four-neck flask in the oil bath device with stirrer, thermocouple, condenser and constant pressure dropping funnel, feed into N 2 While heating to 100°C, slowly add 19.8g of ED-900 dropwise. After the dropwise addition, heat to 150°C and keep warm for about 4 hours until the amino group reaction is complete. Finally, cool to room temperature to obtain a light yellow transparent intermediate. Then add 51.4g diethylenetriamine in the same device, while feeding N 2 While heating to 80°C, slowly add 80g of the intermediate dropwise. After the dropwise addition, keep it warm for about 5 hours until the epoxy group is completely reacted, and then distill under reduced pressure to remove the excess amine to obtain the adduct; add the adduct to In the dispersing cylinder, after passing circulating water at 80°C, add 200g of...

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Abstract

The invention belongs to the field of chemical coatings, and specifically relates to a VOC (Volatile Organic Compounds)-free water-based epoxy curing agent. The curing agent comprises the following components in percentage by weight: 12-25% of epoxy resin, 15-30% of terminal epoxy glycidyl ether, 3-11% of polyether amine, 18-35% of an amine compound and 40-60% of deionized water. The preparation method of the curing agent comprises the following steps: preparation of an intermediate, epoxy-amine addition and dispersion by using deionized water. The preparation method of the curing agent is simple, the reaction process is easy to control, no organic solvent is used in the preparation process and the storage stability of the curing agent is good. A water-based epoxy zinc-enriched primer which is made of the curing agent has the characteristics of high drying speed, low applicable temperature, good film flexibility, high hardness, excellent corrosion resistance and the like, and can be applied to the fields such as ocean engineering, bridges, grade levels, high-speed rail facilities, wind power equipment, petrochemical engineering and heavy machinery.

Description

technical field [0001] The invention belongs to the field of chemical coatings, in particular to a zero-VOC water-based epoxy curing agent for water-based epoxy zinc-rich primers. Background technique [0002] At present, my country is in a period of rapid economic development, and steel is widely used in roads and bridges, marine engineering, ships, petrochemicals, high-speed rail facilities, wind power equipment, heavy machinery and other structures and equipment mainly composed of steel structures. Corrosion and scrap, so metal anti-corrosion has become a very urgent problem. Applying anti-corrosion coatings is the most effective measure to prevent metal corrosion. Due to the excellent mechanical properties, chemical resistance, flexibility, high adhesion, and extremely low volume shrinkage of epoxy resins and the excellent cathodic protection of zinc powder, epoxy zinc-rich primers have become the most widely used anti-corrosion coatings for metals. The largest variety....

Claims

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Application Information

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IPC IPC(8): C08G59/50C08G59/20C09D163/00C09D7/12
Inventor 刘志平刘娅莉王开吉杨锦贾元峰吕冬福曹银祥金土才
Owner 浙江纳宝莱化工科技有限公司
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