Steel pipe crosslinking agent epoxy powder coating

Steel pipe crosslinking agent epoxy powder coating,In order to improve the coating density, prevent to produce pinhole, add a certain proportion in steel pipe epoxy powder coating formula of degassing agent, also joined in a certain amount of flow ping agent. The function of adding suitable amount of additives can improve the mobility and flexibility of powder.

Selection of fillers to a large extent influence the final performance of the coating, suitable fillers can not only improve the physical and mechanical properties of the coating and chemical resistance, but also to the construction performance, storage performance will improve. Moderate drinking water should choose the fineness of powder coatings, stable performance and health non-toxic fibrous and lamellar fillers.

This study choose packing 1, 2 and a kind of special packing as the main filler filling material.

1 is a kind of inorganic filler needle-like mineral, non-toxic, resistance to chemical corrosion, thermal stability and size stability is good, have a glass and pearly luster, low water absorption and oil absorption value, mechanical properties and electric properties, and has certain reinforcing effect. Make the paint can get better mechanical strength, increase the durability and enhance the adhesion and corrosion resistance. There are good coverage and adhesion.

Packing 2 unique two-dimensional lamellar structure, the stability of the chemical structure, the function such as effective improve the coating permeability resistance, abrasion resistance and corrosion resistance, also do not contain any radioactive elements, is a kind of functional green environmental protection packing. Make special packing crosslinking content have excellent insulating performance and electric arc resistance; Can increase the coefficient of thermal conductivity, improve the hardness and wear resistance, change the adhesive performance and improve flame retardant performance.

Can reduce the coefficient of linear expansion of crosslinking and crosslinking shrinkage rate, thus eliminating internal stress, prevent cracking; According to the characteristics of different filler made the proportion of different collocation, according to a large number of experimental results, choose the suitable proportion collocation as the formula of the solution. Pigment according to the demand to determine the color, epoxy powder coating for light grey commonly drinking water.

The required raw materials ready; According to the formula the dosage of the accurate weighing of raw materials; According to the resin, filler, pigment, filler, feeding sequence of the resin into the mixer mixing; Melt extrusion (area 65 ~ 70 ℃, two areas 90 ~ 100 ℃, 70 ~ 80 ℃) of three; Tablet, broken; Grinding, screening, and at the same time to join function additives 2; Too much sample screen detection; Weighing, packaging; Put in storage.

(1) the steel surface before coating, the appropriate method should be adopted will be attached on the surface of the steel pipe, oil, grease and any other impurities removed. Into the surface of the steel tube processing equipment and parts there can be no pollution on the surface of the steel tube material.

(2) before the spray derusting, should preheat tube, and keep the temperature at least on the surface of the steel tube is higher than 3 ℃ above the dew point.

(3) the steel pipe surface should be spray derusting, descaling grade should reach the current national standard "steel surface before coating corrosion level and descaling grade specified in GB 8923 Sa 2.5 magnitude, depth anchor lines should be in 50 ~ 100 microns.




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


(4) after the spray derusting, the application of clean, dry compressed air purging steel pipe inner surface, the pipe inner surface residual steel shot/clean sand and dust removal.

Degree of surface dust should reach the current national standard "coated steel surface before coating processing The surface cleanliness of qualification test Part 3: coated steel surface before coating of dust evaluation method (pressure sensitive adhesive tape) GB/T 18570.3 level 2.

(5) that is likely to affect the quality of coating surface defects should be repaired. For severe defects or unable to eliminate defects of steel pipe, shall negotiate with the owner to achieve consistent processing opinion.

(6) after the spray derusting steel pipe should be according to the current national standard "coated steel surface before coating processing The surface cleanliness of qualification test Part 9: water-soluble salt law on the conductivity of GB/T 18570.9 methods or other appropriate method to detect the contents of salt on the surface of the steel pipe, steel pipe surface of salt should not exceed 20 mg/m2.

(7) is used in the coating of the compressed air must be clean, dry, no oil.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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