D68 Matt-finishing Hardner is salt prepared from cyclic amidine and polycarboxylic acid . it is equal to B68 of HüLS (A.G.). it can be used as curing agent for epoxy/polyester hybrid powder coatings with super Matt-finish film of coatings and excellent of vrious mechanicaproperties . through adjusted the formulations , can make luster of coating film of coating film changing between matt finish and high gloss with better apprarence .

Specifications :

Appearance : white or pale powder

Melting point range: 222-228℃

Recommended formulations

Recommended curing conditions

180℃×20-25 mins

190℃×10-12mins

200℃×8-10 mins

Usage :

Because of D68 matt-finishing hardner has high melting point, it’s compatibility with resin is unstisfactory. To eliminate this defect, it’s very important in composing D68 matt-finishing hardner to homoeneous disperion, customers can properly enhance extruding temperature(100℃ up) or more extruded .