Epoxy resin anticorrosion coatings cross-linking agent

Epoxy resin anticorrosion coatings cross-linking agent, epoxy resin in anticorrosion coating is widely used in the engineering construction, the pros and cons of its anticorrosion performance is largely affected by crosslinking agent.

In this article, through analysis and study different crosslinking agent on the basic performance and epoxy resin coating anticorrosion coating anticorrosion performance influence degree, to provide a reference for the anticorrosion construction.

Due to the defects of material itself, the influence of natural environment, and the management, the cause of most of the materials, especially metal material corrosion occur. Each year, according to the investigation of developed countries, the economic loss caused by corrosion accounted for about 2% ~ 4% of the gross national product (GNP), people are facing a very serious problem.

There are many kinds of anticorrosion technology, using the anticorrosive coatings is one of the most simple and effective method of the epoxy resin coating is one of the most widely used. Epoxy resin is divided into two kinds of thermosetting resin and thermoplastic resin. For thermosetting resin, crosslinking agent is an important part of.

For reasons of economy and generality, the vast majority of epoxy resin at home and abroad are almost bisphenol A type epoxy resin, the difference is the selection of crosslinking agent. In this paper, the different crosslinking agent on the properties of epoxy anticorrosive effect were analyzed, select suitable types of crosslinking agent to improve the anti-corrosion performance of materials, and reduce the corrosion damage.

The performance characteristics of epoxy anticorrosive coatings depends largely on crosslinking agent. High performance epoxy coating must be supporting the use of high performance and good construction of epoxy crosslinking agent. But at present domestic research focus on epoxy resin, for the development of crosslinking agent is slower, still stay in fatty amines and their modified products.
Epoxy crosslinking agent varieties more, general use modified polyamide anti-corrosion primer, when high requirements for coating used modified aromatic fatty amine, modified alicyclic amine or modified phenolic amine crosslinking agent, so the study of crosslinking agent is currently the focus of research. Based on this, this article design the following analysis to determine the content of crosslinking agent of performance:




Chinese name: Diethyl toluene diamine(DETDA)

Physical and chemical properties: light yellow transparent liquid, slightly soluble in water, soluble in alcohols, ethers, ketones and other polar organic solvents, and polyether, polyester polyol compatibility.

Density 1.022

Viscosity (20 ℃) ??mPa·ss290±10

Pour Point ℃-9

Boiling point of310°C

Flash Point°C161.1°C


(1) the selection of several common and new crosslinking agent, with 601 epoxy resin as basic resin, by changing coating formula of the crosslinking agent to produce different types of crosslinking agent of epoxy anticorrosive coating.

Of different crosslinking agent (2) the basic properties of the epoxy anticorrosion coatings, such as hardness, adhesion, flexibility, high impact strength, thickness, etc., was studied by means of physical properties.

(3) with different crosslinking agent epoxy anticorrosive coating electrochemical impedance test, study different crosslinking agent of epoxy coating anticorrosion performance impact.

This article chooses the crosslinking agent has eight kinds: (1) NX - 2003 crosslinking agent; (2) the NX - 2003 - d crosslinking agent; (3) D0965 crosslinking agent; (4) D9050w crosslinking agent; (5) D9050LT crosslinking agent; 6 D8190 crosslinking agent; All landowners D3007 crosslinking agent; Today NX - 2015 - a crosslinking agent.

Coating the basic performance test mainly according to the national standards, such as hardness testing on the basis of GBT6739-2006 "the film hardness pencil method", anti-corrosion performance test carried out by electrochemical impedance phase in the form of.

Different crosslinking agent of epoxy coating has good adhesion, hardness, resistance to impact strength, flexibility and weatherability, these performance is basically the same. The differences reflected in the film hardness, table dry time, work time, D8190 crosslinking time, shortest D9050W crosslinking time the longest, NX - 2015 - a though crosslinking time is shorter, but its hardness is low. In combination with all performance can be seen, comprehensive performance is the best D8190.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

Diethyl toluene diamine(DETDA)  http://www.yaruichem.com