Water based epoxy varnish (paint) crosslinking agent

Water based epoxy varnish (paint) crosslinking agent

In condiment jar to formula of emulsion, dispersing agent, defoamer, leveling agent, deionized water, is used to adjust viscosity, stir well, testing meet the internal control index filtration after packaging.

Crosslinking agent on the basis of the required ratio, the dosage of emulsion, emulsion epoxy value, modified amine adduct of active hydrogen yield, calculate the dosage of modified amine adduct, adjust with deionized water, add defoaming agent defoaming, after testing qualified for packaging.

2.1.1.3 waterborne epoxy anticorrosive coating performance indicators mainly adopts HG/T4759-2014 standard for testing, at the same time combined with solvent epoxy coating performance, and increase the outdoor placed on the investigation to the practical application environment, according to the paint: crosslinking agent = 2:1 ratio.

The product samples of water-based epoxy emulsion and modified amine addition are very good performance, and the performance is fully satisfied with the HG/t4759-2014 standard. So using this emulsion, by formula design, the advantage of the characteristics of all kinds of raw materials, adjusting products just because of the impact of high hardness, bending the shortage of qualified, according to many years of experience in product development, it is entirely possible that, in, in the bottom of a water-borne epoxy anticorrosive paint on adjusting the good performance of the samples.

Production process of water-based epoxy anticorrosive paint

Production process: a. primer in condiment jar to join formula emulsion, dispersing agent, half of the amount of deionized water, stir evenly, add red iron oxide, zinc phosphate, barium sulfate, in turn, talcum powder high speed dispersion 10 min, grinding to the fineness of 50 um, or less inflow are added into the grinding good pulp leveling agent, defoamer, adjust the formula with deionized water, after testing qualified filter packing.

B. intermediate paint production technology: in condiment jar add formula of latex, dispersant, stir well, in order to join the micaceous iron oxide, aluminum tripolyphosphate, high-speed disperse 30 min, add formula of flow ping agent, defoaming agent, thickener, adjust the formula with deionized water, after testing qualified filter packing.

C. paint production technology: in condiment jar to join formula emulsion, dispersing agent, half of the amount of deionized water, stir well, in order to join titanium pigment, barium sulphate, talc powder high speed disperse after 10 min, grinding to the fineness of 35 um or less, then add formula of levelling agent, defoamer, adjust the formula with deionized water, after testing qualified filter packing.




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).


D. the preparation of waterborne epoxy crosslinking agent: according to the required ratio, the dosage of emulsion, emulsion epoxy value, modified amine adduct lively hydrogen yield, dosage of modified amine adduct, can be calculated using deionized water adjustment, add defoaming agent defoaming, after testing qualified for packaging.

Performance indicators mainly adopts HG/T4759-2014 standard for testing, at the same time combining solvent epoxy HG/T4340-2012 standard for testing, primer according to paint: crosslinking agent = 4:1, intermediate paint paint: crosslinking agent = 3:1, paint according to paint: crosslinking agent = 3:1 ratio.

Conventional emulsifier can't emulsifying performance and stable epoxy resin emulsion, using common reactive and Gemini surfactant, using its contain both hydrophilic chain segment, and epoxy resin containing oil wet segment, can be very good to improve the compatibility of emulsifier and epoxy resin, emulsion to produce stable performance, low cost, solve the problem of the waterborne epoxy emulsion sources of raw materials, at the same time modified amine adduct is both crosslinking agent and emulsifier, mixing can be made into diluted before use of zero VOC water-borne epoxy anticorrosive paint.

Water-based defoaming effect than solvent products, be sure to use defoaming agent, but as a result of defoaming agent will appear more shrinkage cavity, there will be fewer pinhole, must control the dosage, dosage of actual control between (0.2 0.5) %.

Due to the water surface tension, the film will appear shrink, bubble disappear after often appear pore, no flow ping agent apparent effect is poor, and affect the product performance, so must add flow ping agent, considering water flow ping agent price is high, the dosage of general control between (0.3 0.6) %.

Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd 

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