Dow Corning introduces an
innovative fluorosilicone additive for efficient, defect-free foam control,
even after long-term storage
Is foam generation causing problems with the production, filling and
application of your solvent-based or radiation-curable paints, inks and
coatings? Are your high-solids formulations causing you particular trouble? Do
you see more defects and haze and gloss issues resulting from the addition of
your foam control agents? And do you have to use several different additives to
control foam generation in your different solventborne, solventless and
Corning® 100F Additive (PDF). It is a fluorosilicone
defoaming agent that is effective in solvent-based and radiation-cured coating
formulations, including high-solids systems. Because it is effective at very
low use levels, Dow Corning 100F Additive does not affect the
surface appearance or recoatability of the applied film. And it is suitable for
multiple formulations, so you can achieve synergies in your manufacturing
operations and supply chain. Dow Corning 100F Additive also helps
improve customer satisfaction because it provides excellent foam control, even
after long-term storage in formulated coatings.
Advantages of Dow Corning® 100F
Fluorosilicone for high-efficiency defoaming
Effective at very low use levels
Does not affect recoatability
In-can stability for continued performance, even after long-term
Can be used in solvent-based, high-solids solventborne, solventless and
Can be added in the let-down stage
Does not cause severe surface defects in the applied coating
Clear and colorless formulation
Does not cause gloss change or haze in the coating finish
Higher flash point (47ºC) for better storage safety
Improved Foam Control with Fluorosilicone
The low surface tension of Dow Corning 100F Additive enables very
efficient foam control. The new fluorosilicone additive performs at very low
concentrations, giving effective foam control at very low silicone addition
levels, even in high-solids formulations. The low addition levels also mean
Dow Corning 100F Additive does not cause issues with
Dow Corning 100F Additive improves foam control performance beyond
what is possible with other fluorosilicone-based products available today. The
amount required is formulation-dependent, but Dow Corning 100F
Additive typically is added up to 0.7 percent by weight (equivalent to 50 ppm
Figure 1: Dow Corning® 100F Additive compared to
competitor additives in a
solventless, UV-curing acrylate varnish.
Foam height after shearing for
1 minute at 5,000 rpm using a dissolver blade.
Effective Long-Term Foam Control
Dow Corning 100F Additive provides better stability in coating
formulations months after manufacturing has been completed. Its enhanced in-can
stability in both solvent-based and solventless formulations gives long-term
foaming protection for increased customer satisfaction.
After aging at 50°C for four weeks, good long-term foam control is still
observed with Dow Corning 100F Additive in a high-solids (59
percent) paint, which outperforms the competitor solution.
Figure 2: Dow Corning® 100F Additive at 0.5 weight percent (50
ppm silicone) in a
high-solids red paint.
|Density (g/l) is reported after
shearing 5 minutes at 2,800
rpm using a dissolver blade
for un-aged and heat-aged
(1 and 4 weeks at 50°C) paint.
|Excellent results have been obtained in other types of formulations. For
example, in a white, high-solids, solvent-based coating,
Dow Corning 100F Additive provides better foam control after
storage for three months at 50°C compared to a competitor antifoam.
Dow Corning 100F Additive is designed to be effective without
compromising the surface appearance of the coating. As a clear and colorless
formulation, it does not impact the gloss or clarity of the coating. And
because it has good compatibility with solventborne and radiation-curable
coating systems, Dow Corning 100F Additive has a low tendency to
cause craters. In addition, it can be added in the let-down stage without
causing surface defects. And this performance is maintained after long-term
storage of the coating formulation.
Great Foam Control and Surface Appearance
In a white, high-solids, solvent-based paint, on Day 1 after roller
application, micro-bubbles are still evident at the surface with a competitor
material, but they are eliminated in the coating with Dow Corning
100F Additive. This performance is exaggerated after the paint formulated with
the additives is left for 3 months at 50°C.
Table 1: Differentiated performance of Dow Corning® 100F
Additive after long-term
storage and with roller application.
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