Name: Superwetting Agent (Dynol 604 type)
Brand: Coatingsink
SKU: substrate-wetting-dynol604-type
Availability: InStock

Question 1

At what dosage does this superwetter reach maximum dynamic surface tension reduction?

Accepted Answer

Effective superwetting is achieved at 0.05–0.2% active on total formulation weight. At 0.1%, dynamic surface tension (measured by maximum bubble pressure at 100 ms bubble lifetime) typically falls below 25 mN/m — well into the superwetting regime that enables spreading on low-energy substrates such as polyolefin films and powder-coated metals. Increasing dosage beyond 0.2% rarely improves wetting further and may cause foam.

Question 2

Is this superwetting agent stable in high-pH waterborne formulations?

Accepted Answer

The trisiloxane ethoxylate backbone is susceptible to hydrolysis above pH 9 and below pH 4 over extended storage. For formulations in the pH 7–9 range (typical waterborne acrylic or PU dispersions), shelf stability is good. If your system is strongly alkaline, run a 4-week stability test at 50 °C before committing; switching to an acetylenic diol wetter may be preferable for extreme pH conditions.

Question 3

Can this additive replace a standard silicone flow additive for gloss coatings?

Accepted Answer

Not directly — superwetters target dynamic surface tension and substrate wetting, while polysiloxane flow additives primarily reduce equilibrium surface tension and improve leveling/slip. In practice, formulators often combine 0.05–0.1% of this superwetter for substrate wetting with 0.1–0.3% of a polyether-modified silicone for leveling. Using the superwetter alone in gloss coatings can cause inter-coat adhesion issues at overdose; evaluate at your target film weight.

Appearance	Clear to slightly hazy liquid
Active Content	100%
Density (25°C)	1.03 g/ml
Equilibrium Surface Tension (0.1%)	~21 mN/m
Dynamic Surface Tension (0.1%, 100 ms)	<25 mN/m

Superwetting Agent (Dynol 604 type)

Specifications

FAQ

Interested in Superwetting Agent (Dynol 604 type)?