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 Cost-effectively prevent flooding
and floating in white, gray and pastel formulations with an innovative silicone
dispersant additive from Dow Corning
Compatibility of pigments in solvent based paints can be an issue to the
formulator. TiO2 and colored pigments can
separate in-can, leading to pigment floating. The concentration and separation
of pigments on drying also can result in inconsistent color performance on
application. Are these two attributes important to you?
Then consider
 Dow
Corning® 3 Additive (PDF). At very low concentrations,
this silanol functional silicone resin effectively prevents the flooding and
floating of solvent based formulations, particularly for whites (titanium
dioxide based), grays and pastel shades with a good cost-in-use compared to
competitor products. Targeted applications and markets for
Dow Corning® 3 Additive include producers of wood coatings,
protective coatings, industrial coatings, automotive OEM and refinish paints,
printing inks, and pigment pastes.
Advantages of Dow Corning® 3
Additive
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Prevents flooding and floating for improved color consistency
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Can be used in a wide range of pastel and gray solvent based resin
systems
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Highly effective at low concentrations for good cost-in-use versus the
competition
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Multi functional additive that also improves leveling for simplified
formulation
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Can be added in pigment grind or during let-down for formulating
flexibility
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Low viscosity for easy incorporation
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Low VOC content at the recommended use levels (typically <0.01
g/l)
Effective Prevention of Flooding and Floating
Dow Corning® 3 Additive is most effectively used in the grind phase
when dispersing TiO2 in white base paints.
A silanol functional silicone resin, Dow Corning® 3 Additive offers
an alternative chemistry to market for dispersant technology and has been shown
to be highly effective versus existing market solutions.
Figure 1: Floating (in-can observation) and flooding (rub-out results) with
Dow Corning® 3 Additive versus competitor dispersants in a solvent
based 2K PU gray wood coating. All additives added during grinding of base
white coating.
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Competitor 1: 50 percent actives
modified polyurethane; Competitor 2: 50 percent actives unsaturated
polycarboxylic acid polymer + polysiloxane copolymer; (ΔE): the color difference between the rubbed and
unrubbed surfaces of a freshly applied film on a LENETA chart.
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Excellent Efficiency for Low Cost-in-Use
The unique chemistry of Dow Corning® 3 Additive also enables it to
be highly effective at very low dosage levels. In fact,
Dow Corning® 3 Additive performs more effectively at preventing
flooding and floating than competitive materials at less than half the addition
level.
Figure 2: Floating (in-can observation) and flooding (rub-out results) in a
solvent based 2K PU gray wood coating. Dow Corning® 3 Additive is
compared to competitor dispersants at lower addition levels in grind.
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Competitors as described in Figure
1.
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The recommended dosage of Dow Corning® 3 Additive is 2-10 weight
percent of the titanium dioxide used when dispersing TiO2 in white base paints (or 0.2-1 weight percent
of a total formulation containing 10 percent TiO2). Concentrations ranging from .05-0.5 weight
percent based on the total formulation are effective when
Dow Corning® 3 Additive is used in the “co-grind” of titanium
dioxide.
Flexibility with Post-Addition Performance
Although most effective in the grind stage, Dow Corning® 3 Additive
also can be post-added at levels as low as 0.03 percent by weight in the total
formulation to improve flooding and floating beyond traditional dispersants on
the market today.
Figure 3: Floating (in-can observation) and flooding (rub-out results) in a
solvent based 2K PU gray wood coating. Improvements are demonstrated by
post-adding Dow Corning® 3 Additive and Competitor 2 at the
addition levels indicated.
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Competitors as described in Figure
1.
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