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Cashew amine epoxy curing agent for marine heavy anti-corrosion coating and preparation method for curing agent

A cashew amine epoxy, heavy-duty anti-corrosion technology, applied in anti-corrosion coatings, epoxy resin coatings, coatings and other directions, can solve the problems of difficult popularization and application, high product cost, dark product color, etc., and achieves excellent adhesion and low cost. , good balance of strength and hardness

Active Publication Date: 2014-11-19
JIANGSU SANMU GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former method takes a long time to process, the production efficiency is low, and the product is dark in color; the product prepared by the latter method has high cost and is not easy to popularize and apply

Method used

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  • Cashew amine epoxy curing agent for marine heavy anti-corrosion coating and preparation method for curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of cardanol amine epoxy curing agent for marine heavy-duty coatings, according to the order of feeding, it is made of the following raw materials in parts by weight: 23 parts of cardanol, 1.2 parts of diethylenetriamine, 15 parts of aqueous solution of 37% formaldehyde: two 10 parts of ethylene triamine, 8 parts of 37% formaldehyde aqueous solution.

Embodiment 2

[0027] A kind of cardanol amine epoxy curing agent for marine heavy-duty coatings, according to the order of feeding, it is made of the raw materials in the following parts by weight: 20 parts of cardanol, 1 part of diethylenetriamine, 12 parts of aqueous solution of 37% formaldehyde: 2 9 parts of ethylene triamine, 7 parts of 37% formaldehyde aqueous solution.

Embodiment 3

[0029] Preparation method of cashew amine epoxy curing agent for marine heavy-duty anti-corrosion coatings:

[0030] The reaction process is as figure 1 Shown:

[0031] Introduce a nitrogen tube into a 1000mL four-necked bottle for nitrogen purging, then put in 300g cardanol and 13g diethylenetriamine in sequence, and then continue nitrogen purging. After purging, under mechanical stirring and nitrogen protection, slowly Add 162g of 37% formaldehyde aqueous solution dropwise, control the system temperature below 70oC, and keep it at about 80oC for 2 hours. Then add 120g of diethylenetriamine dropwise, and control the system temperature below 80oC. After adding diethylenetriamine dropwise, continue to drop 85g of 37% formaldehyde aqueous solution, control the system temperature below 80oC, and keep the temperature at about 80oC for 2 hours , vacuum dehydration, the initial vacuum temperature is 80oC, the maximum temperature in the later stage is not more than 100oC, and the m...

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Abstract

The invention discloses a cashew amine epoxy curing agent for a marine heavy anti-corrosion coating. The curing agent is sequentially prepared from the following raw materials in parts by weight: 20 to 23 parts of cardanol, 1 to 1.2 parts of diethylenetriamine, 12 to 15 parts of 37 percent formaldehyde aqueous solution, 9 to 10 parts of diethylenetriamine, and 7 to 8 parts of 37 percent formaldehyde aqueous solution. According to the cashew amine epoxy curing agent for the marine heavy anti-corrosion coating, the raw material composition and the optimal proportion and the adding sequence of the raw materials are selected through a large quantity of experiments, and the proportion of each component is scientific and reasonable; acetal is catalyzed by adopting diethylenetriamine to control the viscosity parameter, and then Mannich addition is carried out on the periphery of molecules to improve the alcohol solubility; and the cashew amine curing agent prepared by the method is high in activity, viscosity and solid content and good in compatibility, does not release oil, and can overcome many defects of the cashew amine epoxy curing agent prepared by the method in the prior art.

Description

technical field [0001] The invention relates to an epoxy curing agent, in particular to a cashew amine epoxy curing agent for marine heavy-duty anti-corrosion coatings and a preparation method thereof. Background technique [0002] Cashew amine epoxy curing agents for marine heavy-duty coatings generally require high viscosity and high solid content. The conventional method for preparing this type of cashew amine epoxy curing agent is to heat and polymerize low-viscosity high-solid cashew amine at 100 to 110°C for a long time, or add a small amount of epoxy resin to increase its viscosity. The former method has longer process time, low production efficiency and dark product color; the product prepared by the latter method has high cost and is not easy to popularize and apply. Therefore, on the basis of the prior art, how to reduce the process time, improve work efficiency, and significantly reduce the cost is a key problem in the existing technology for preparing high-visco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/62C09D163/00C09D5/08C09D7/12
Inventor 樊丰文惠正权
Owner JIANGSU SANMU GROUP CORPORATION
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