 |
 |
|
|
|
| BYK-373 |
 |
| Solution of a polyether modified hydroxy functional dimethylpolysiloxane-copolymer |
 |
Reactive silicone surface additive for solvent-based and solvent-free systems.
The additive orients to the paint surface, reacts via its primary OH-groups with the binder and is thus fixed at the paint surface.
It is preferably used in two-pack polyurethanes but can also crosslink with the following binder systems alkyd/melamine, polyester/melamine, acrylic/melamine, self-crosslinking acrylates, and epoxies.
In comparison to conventional non-reactive silicones, it provides more permanent surface properties (such as improved slip, solvent resistance, weather resistance, anti-blocking and less dirt retention) when crosslinked to the paint surface by its reactive groups.
BYK-373 additionally reduces surface tension and consequently improves substrate wetting it improves levelling and prevents B?ard cells. Compared to BYK-370, BYK-373 has twice the number of OH-groups in each molecule. As a result, reduction of surface tension and the increase in surface slip are notably less.
BYK-373 also can be used in UV-crosslinkable wood and furniture coatings.
In this application field, it greatly improves levelling and, for curtain coating systems, stabilizes the curtain.
In these cases, the reactive groups of the additive are not utilized. |
 |
Density at 20'C : 0.99
Non-volatile matter in % : 50
Flahs point in 'C : 34 |
|
|
|
|
|
