Thick type coating epoxy coating with crosslinking agent

Thick type coating epoxy coating with crosslinking agent,Development of thick film type fast crosslinked epoxy coating has excellent mechanical properties and corrosion resistance properties of various performance at or above the SY/T 0315-2005 about the requirement of the coating performance, can meet the technical requirements of pipeline repairing. A brush or spray coating film thickness is 1000 microns, can achieve disposable design film thickness, and the coating can be quick crosslinking in 3.5 hours, improving the construction efficiency. Construction phase (for) of coating was studied, on the basis of construction on site to guide.

Widely used in solvent-free epoxy coating system on the market at present thixotropic agent of the main points of inorganic and organic type two kinds, inorganic thixotropic agent have spirit of SiO2 and bentonite, the coating anti-settling viscous effect is obvious; Organic kind of thixotropic agent with hydrogenated castor oil and its derivatives, polyamide wax, sulfonate derivatives, polyurea derivatives, etc., the effect is good for polyamide wax and polyurea derivatives.

But strict polyurea derivatives for coating polarity, is generally not recommended. Therefore, choose meteorological SiO2, bentonite, polyamide wax study, three kinds of thixotropic agent experiment test under the condition of different temperatures to achieve the maximum thickness of the coating, to evaluate the sag resistance of coating.

With the increase of coating temperature, polyamide wax as the maximum thickness of the coating of thixotropic agent is slightly decreased, when the temperature is 45 ℃ maximum coating thickness to reduce only 27 mu m, show that in the coating system under the thixotropy of polyamide wax less affected by temperature. And gas phase SiO2 and bentonite as coating of thixotropic agent in elevated temperature from 25 ℃ to 45 ℃, the maximum thickness respectively reduce 125 microns, 224 microns, that the two kinds of thixotropic agent coating sagging resistance are greatly influenced by temperature.

Therefore, the determination by polyamide wax as the solventless epoxy joint coating thixotropic agent, to ensure the construction in high temperature can be a film of 1000 microns.





Chinese name: Diethyl toluene diamine(DETDA)

Diethyltoluenediamine packing： net weight 200KG/ galvanized iron drum (a small cabinet pallet loaded 16 tons), 1000KG/IB barrels (a small cabinet loaded 18 tons or 23 tons of ISOTANK).


The formulation and physico-chemical properties of the coating material. Film-forming resin was determined by the above test and thixotropic agent, add a certain amount of fillers and additives, dispersion type grinding made of thick coating crosslinked quickly repairing coatings.

Development of coating has a film thickness, the characteristics of quick crosslinking, and has good physical and chemical properties, implements the liquid solvent-free epoxy coating solid powder coating for the physical and chemical properties, development of coatings in the field application effect is good, can be widely used in pipeline repaired mouth.

Construction of coating. Development of the solventless epoxy for coating for two-component, part A and part B mixed polymerization reaction to form dense coating.

Coating crosslinked features quick decision the rapid reactivity of the coating, and along with the temperature, reaction speed of coating, coating and explosive, led to the coating application period is shorter. Therefore, testing the different temperature, different ratio of without solvent for coating application period, in order to guide field construction.

Can be concluded from the above experiment coating under different temperature, different ratio of applicable period, the results can be guidance for site construction. Against the solventless epoxy for coating characteristics of quick crosslinking, in site construction according to construction area size can choose coating or coating.

Small areas, appropriate chooses blade coating will be both A and B components according to the 100:18 ~ 20 percentage mix stir well, then pour in coating substrate with rapid uniform coating scraper, meet the thickness requirements. When used in accordance with the requirements for ingredients, avoid dosing big implosion.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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