Coating with modified fatty amine crosslinking agent

Coating with modified fatty amine crosslinking agent,Crosslinking speed faster, cathodic disbonding resistance and resistance to bending performance is good, but the paint film of heat resistant performance was poor.

Nice alkali modification, crosslinker crosslinked slower, bending resistance, cathodic disbonding resistance, heat resistance and adhesion is poor. Crosslinking agent crosslinked modified alicyclic amine speed faster, paint film of heat resistant performance is good, but resistance to bending and cathodic disbonding resistance difference in modified alicyclic amine crosslinking agent.

In modified alicyclic amine crosslinking agent mixing different proportion of modified alicyclic amine obviously improved after the heat resistant coating performance, integrated the advantages of two kinds of crosslinking agent in the modified alicyclic amine and modified alicyclic amine ratio of 5:1, the comprehensive performance of the coating can meet the requirements. Therefore, the determination by modified alicyclic amine mixed with modified alicyclic amine ratio of 5:1 as crosslinking agent of the coating.

Research of fillers. Reasonable allocation of fillers on the coatings performance is critical. The rational use of filler can increase the viscosity of paint, improving its thixotropy, prevent flow, increase the coating thickness, improve the mechanical properties of the coating, anticorrosion, compactness and adhesion, reduce the resin shrinkage after crosslinking, improve the heat transfer and resistance to water permeability of the coating, and to a certain extent, can reduce the cost of the product.

This study from the packing for the coating resistance to bending, cathodic disbonding resistance, heat resistance, abrasion resistance, and considering the properties of coating, etc. Titanium dioxide covering power, high density, low oil absorption value, can effectively improve the coating covering power. Green silicon carbide of high hardness, excellent wear resistance, resistance to cathodic disbonding.

Sericite powder plate shaped structure, can effectively prevent infiltration of chemical substances, present a degree of elasticity in the coating at the same time, with white, green silicon carbide have good complementarity.

Modified silicon powder in silicon powder surface coating a layer of can and epoxy resin coating and metal substrate to form chemical bonds, which can enhance packing and film-forming resin, filler and bonding force between the metal base material, the packing also has lower particle size, better able to fill the space between the other packing.

Choice of packing complement each other, enhance the coating cathodic disbonding resistance, wear resistance, chemical medium corrosion resistance and resistance to bending performance. So sure choose white, green silicon carbide, sericite powder, modified silica powder, etc. As a system of fillers.




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


The research and development in thick type epoxy coating used for fusion bonded epoxy powder coating pipeline repairing, need with similar physical and chemical properties of epoxy powder coating.

At present, the domestic epoxy powder coating used for external anticorrosion double the thickness of the design in about 800 microns, in order to ensure that the scene for the thinnest point meet the thickness requirements, the development of joint coating thickness of a film to be more than 1000 microns, and require coating system has lower viscosity, facilitate the site construction.

Therefore, by choosing different coating thixotropic agent on the thixotropy of experiment research, give the paint by higher viscosity at low shear and high shear with low viscosity, to prevent the occurrence of flow after the paint coated hang wait for a phenomenon, and to make sure that the flow flat paint better sex.

Due to the liquid viscosity of epoxy resin with significantly decreased with the rising of temperature, solvent-free epoxy coating are given viscosity decreases with temperature rise of and features.

Appropriate chooses spraying large area construction, the best way is to use with heating device of double tube feeding high-pressure airless spraying device. In advance of the solventless epoxy for coating A and B components are preheated, preheat sticky solventless epoxy for coating to 45 + / - 5 ℃, in order to lower the viscosity of the coating, satisfy the feed and atomizing pressure, at the same time due to the coating of A and B component feed, respectively, according to the proportion of mixture in the mixing chamber after spraying out quickly, avoid the premixed because of solventless epoxy for paint after the operation of the pot life is too short and cause implosion gun construction problems.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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