 Discription |
Matt Hardener R68 (Same as Degussa VESTAGON B68 Matt Hardener)is Epoxy Resin Hardener /Epoxy Resin Curing Agent.
It is used as hardener for epoxy resin , hybrid powder coatings to achieve coatings with matt surface having excellent mechanic quality and wonderful appearance. |
Characteristics |
ㆍAppearance:White or light yellowish powder
ㆍMelting range:210-230˚C
ㆍPurity:≥99% |
| Application |
Matt curing agent R68 for epoxy resin and epoxy polyester hybrid powder coatings is used to achieve coatings with matt surface having excellent mechanic quality and wonderful reappearance. |
Specific instructions |
ㆍRecommending formula
gloss 60˚C |
5-6 |
20 |
40 |
70 |
epoxy(663U or E-12) |
54.5 |
39.7 |
35.7 |
31.8 |
Polyester(acid valve:25-35 mgKOH/g) |
---- |
14.8 |
20.8 |
26.7 |
R68 |
5.0 |
5.0 |
3.0 |
1.0 |
Filling material (BaSo4,CaCo3) |
40 |
40 |
40 |
40 |
Levelling agent |
0.5 |
0.5 |
0.5 |
0.5 |
Carbon black |
0.5-1 |
0.5-1 |
0.5-1 |
0.5-1 |
ㆍRecommending curing condition
180˚C |
20-25 min |
190˚C |
10-12 min |
200˚C |
8-10 min |
|
| Notice |
The R68 's compatibility with resin isn't well for its high melting point, to avoid this default it's necessary to distrbute them or to make the curing temperature at a higher level.
In the case of epoxy polyester hybrid powder coatings, the polyester used should be low ccidity.Before acid valve the ideal gloss and multiple characteristics tests are needed. |
| Storage |
| The storage period could last a rather long time when it is kept inside the sealed container.Do seal the container again after taking some from it. |
Matt Hardener R 68 Technical Data Sheet
