Description:
Matt hardener N68 is the salts of poly-carboxylic acid with cyclic amidine. The hardener, applied in suitable formulations can produce epoxy or Hybrid coatings for matt or semi-matt gloss with very good flow and properties. Variation between matt and semi-matt surface can be obtained by means of suitable adjustment of formulation.
Technical data:
|
Appearance
|
White powder
|
|
Melting range
|
222~227℃
|
|
Solid Content
|
98.5%min
|
Application:
1. N68 can be applied both in pure epoxy and hybrid (epoxy-polyester) powder coatings.
Gloss ranges from 5~10% in Epoxy coatings and 10~70% in Hybrid coatings.
2. Coatings produced with N68 are characterized by color and gloss stability under normal baking conditions.
3. Hybrid coating with matt or semi-matt gloss may be achieved by replacing some of the polyester in the formulation with an equivalent quantity of N68.
The following gives the formulations of N68 for matt epoxy coatings.
|
Gloss
Formulation
|
20-25
|
20-25
|
5-10
|
5-10
|
|
Epoxy A
|
41.5 wt%
|
--
|
54.5 wt%
|
--
|
|
Epoxy B
|
--
|
41.0wt%
|
--
|
54 wt%
|
|
Polyester
|
14.0 wt%
|
14.5 wt%
|
--
|
--
|
|
N68
|
3.0 wt%
|
3.5 wt%
|
5.0 wt%
|
5.5 wt%
|
|
GLP588
|
1 wt%
|
1 wt%
|
1 wt%
|
1 wt%
|
|
Benzoin
|
0.3 wt%
|
0.3 wt%
|
0.3 wt%
|
0.3 wt%
|
|
TiO2
|
40.2 wt%
|
39.7 wt%
|
39.2 wt%
|
39.2 wt%
|
* Epoxy A: EEW 850-1000; Epoxy B: EEW 700-850.
* Ployester: Acid value 30-35KOHg/mg
* It's noted that the achievement of matt effect and relevant properties of the film is connected with full cured of coatings.
|
Object temp
|
Time
|
|
180℃
|
20~25min
|
|
190℃
|
12~15min
|
|
200℃
|
10~12min
|
Packaging:
Available in polyethylene-lined, multi-ply paper bags, N.W. 20KGS/Bag.
Storage and Handling:
Store in closed containers; avoid contact with skin and eyes; wear dust mask when operating.
China
