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
|
|
20～25min |
|
|
15min |
|
|
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