1. Brief Introduction

Matting hardener CM68 is a salt of an organic polycarboxylic acid with a cyclic amidiine. As a hardener for epoxy resins, the use of this product makes it possible to produce epoxy and epoxy-polyester powder coatings with excellent smooth semi-matt and matt surface. Very good mechanical properties and chemical resistance.

2. Specificafions

Appearance	Almost white, very fine powder
Melting range (℃)	195～225
Nitrogen content (%)	6.7-7.5

3. Formulations Recommended

Item	Ⅰ	Ⅱ(hybrid)
Epoxy resin(1)(wt%)	60	48
Polyester resin(2)(wt%)		15
CM68	5～6	3
Flow modifier(CM506)	1	1
Filler & Pigment	30	30
Other auxiliary agents	3	3

(1) i.e. DER663 U or E-12

(2) Polyester resins with low acid value, l.e. CM-3 or CM-4

4. Curing Conditons

180℃	20～25min
190℃	15min
200℃	10min

5. Properties of Coatings

Item	Ⅰ	Ⅱ(hybrid)
Gloss%(60°)	＜10	25
Impact(direct)(kg.cm)	50	50
Adhession(cross-hatch)	1	1
Appearance(film)	smoth	smoth

6. Package and Storage

Multi-ply paper sacks with polyethene lining. Net weight 20 kg.