TGIC powder coating crosslinking agent

TGIC powder coating crosslinking agent,Polyester/TGIC powder coating is mainly used to protect the structure of the outdoor unit. Mostly aluminum surface, but there are galvanized steel. Usually, the adhesion of coating on the galvanized steel and aluminum is less than some. Coating thickness is usually in 60 ~ 80 microns.

Use of TGIC powder coating other market areas is used outdoor metal furniture (garden), auto parts, such as wheels, fenders, bumpers, window frame, windshield wipers, bicycle components, motorcycles, etc.

Containing amino compounds react with epoxy resin to generate epoxy resin containing tertiary amine and quaternary amine alkali, add one yuan volatile organic weak acid such as acetic acid and cationic waterborne epoxy resin.

This kind of modification of epoxy resin in the actual application is less, this is because the waterborne epoxy crosslinking agent is usually contains amino alkaline compound, the mixture of two components system prone to demulsification and stratification and affect the performance of the system.

More commonly in the chain of epoxy resins by introducing hydrophilic polyoxyethylene group, at the same time ensure that each modified epoxy resin molecule has two or more than two epoxy group, the income of the modified epoxy resin without additional emulsifier can disperse in water emulsion formed. Such as molecular weight is 4000 ~ 20000 of double end group epoxy emulsifier and epoxy equivalent to 190 of bisphenol A epoxy resin and bisphenol A, mixed with triphenylphosphine as A catalyst for hydrogen reaction, can be obtained with hydrophilic poly (ethylene oxide, polyethylene oxide propylene chain end epoxy resin, the resin without additional emulsifier can dissolve in water, and water resistance.

Particles in addition, this method is fine, usually for nanoscale, the front of the two kinds of method, the particle is larger, usually for micron level. From this sense, the chemical preparation steps, although the cost is high, but in some ways has a practical significance.

In introducing hydrophilic epoxy resin chain polyoxyethylene group, at the same time ensure that each modified epoxy resin molecule, there are two or more than two epoxy groups of the modified epoxy resin without additional emulsifier can disperse in water emulsion formed.
As with polyoxyethylene glycol, polyethylene oxide first propylene alcohol and epoxy
resin reaction, forms the base for epoxy adduct, using the adduct and epoxy equivalent of 190 of bisphenol A epoxy resin and bisphenol A, triphenyl phosphate as A catalyst for the reaction, available contain hydrophilic polyoxyethylene, oxygen poly propylene chain segment of epoxy resin.




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 epoxy resin without additional emulsifier can dissolve in water, and as a result of hydrophilic chain section included in the epoxy resin molecule, and thus enhance the water resistance of coating. And the introduction of poly (ethylene oxide and propylene oxide segment after crosslinking of the crosslinking network chain, improve the molecular weight of crosslinking density decreased, formed by coating has certain toughening effect.

Instead turn is a fairly effective method preparation of high molecular weight epoxy resin emulsion, type II waterborne epoxy resin emulsion used in the coatings system usually adopt method instead.

Contrary to the original is a multicomponent system (such as oil/water/emulsifier) in the process of mutual transformation between continuous phase under certain conditions, such as in oil/water/emulsifier system, the continuous phase of water oil phase (or) from oil to the aqueous phase shift, the continuous phase transition zone, the system of the lowest interfacial tension, and thus the size of the dispersed phase is minimal.

Preparation method is usually under the condition of high shear mixing emulsifier and epoxy resin first, then under the condition of certain shear slowly adding water to the system, with the increase of water added, the system gradually shift from the water-in-oil type to oil-in-water type, form a uniform and stable system of water can be diluted.

Usually at room temperature, emulsifying process for solid epoxy resin, often need to use a small amount of solvent and heating of the reentry after lower the viscosity of epoxy resin emulsion.

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