A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. Commonly used agents are insoluble oils, polydimethylsiloxanes and other silicones, certain alcohols, stearates and glycols. The additive is used to prevent formation of foam or is added to break a foam already formed. We can make a distinction between macro- and micro-foam. Macro-foam is often formed at the surface of the coating and micro-foam is entrapment of air bubbles what is not able to rise fast enough to the surface of the coating. For micro-foam you need a so-called air release agent to coagulate the micro bubbles to bigger air bubbles so they can rise faster to the surface to be destroyed. For micro foam you need a so-called air release agent to coagulate the micro bubbles to bugger air bubbles so they can rise faster to the surface to be destroyed. In industrial processes, foams pose serious problems.
They cause defects on surface coatings. They prevent the efficient filling of containers. A variety of chemical formulae are available to prevent formation of foams. Properties:
Generally a defoamer is insoluble in the foaming medium and has surface active properties. An essential feature of a defoamer product is a low viscosity and a facility to spread rapidly on foamy surfaces. It has affinity to the air-liquid surface where it destabilizes the foam lamellas. This causes rupture of the air bubbles and breakdown of surface foam. Entrapped air bubbles are agglomerated, and the larger bubbles rise to the surface of the bulk liquid more quickly.
Coatings
Ink
Plastics
Coatings
TDS
UNIQ®FOAM
CHEMISTRY
SB
WB
SF
FEATURES
DOSAGE(%)
120 S
Non-silicone
■
Strong defoamer especially against macro-foam, can cause haze in high gloss clear coatings
0.1-1.0
130 S
Non-silicone
■
Strong defoamer, with improved compatibility compared to 120S
0.1-1.0
131 S
Non-silicone
■
Strong defoamer, very suitable for clear and pigmented coating
0.1-1.0
132 S
Non-silicone
■
■
Strong defoamer, very suitable for clear coating, espcially against popping and pinholing.
0.1-1.0
150 S
Non-silicone
■
■
Strong defoamer, very suitable for self leveling clear floor coatings. Doesn’t cause haze or turbidity in the dry film.
0.1-1.0
152 S
Non-silicone
■
■
Strong defoamer, very suitable for self leveling floor coatings like epoxy and coil coating. Fast air-release and defoaming properties and excellent film properties.
0.1-1.0
155 S
Non-silicone
■
■
Strong defoamer, very suitable for self leveling epoxy floor coatings. Fast air-release and defoaming properties and excellent film properties.
0.1-1.0
158 S
Non-silicone
■
■
Strong defoamer, 100% very suitable for self leveling epoxy and PU floor coatings. Fast air-release and defoaming properties and excellent film properties and excellent compatibility.
0.1-1.0
170 S
Non-silicone
■
■
Suited for UPE, HS coatings like epoxy and 2K PU
0.1-1.0
175 S
Non-silicone
■
■
Suited for OPV, UV and High gloss coatings
0.1-1.0
180 W
Non-silicone
■
Levelling and anti-popping additive.
0.3-3.0
182 W
Non-silicone
■
Levelling and anti-popping additive.
0.3-3.0
LP2507
Non-silicone
■
Non silicone for grinding and clear coats. Strong and good for destroying macro-foam.
0.1-1.0
LP2537
Non-silicone
■
Non silicone for architectural for emulsion and wall paints.
0.1-1.0
LP2599
Non-silicone
■
Non silicone for grinding, pigmented and clear coats. Strong and good for destroying micro- and macro-foam, suited for architectural, industrial and ink applications.
0.1-1.0
LP2600
Non-silicone
■
Non silicone self emulsifying defoamer. Strong for break down foam in industrial processes. Suited for industrial and ink applications were complying with FDA Cfr. 21, #172.876 is a requirement.
0.1-1.0
235 S
Silicone
■
All round defoamer for spray, rolling, brushing and curtain coatings
0.1-0.6
238 S
Silicone
■
Easy incorporable for top and clear coating
0.1-0.7
245 S
Silicone
■
Alround defoamer for spray, rolling, brushing and curtain coatings. Very good working against micro foam.
0.1-0.6
272 S
Silicone
■
■
Very suited for self leveling epoxy, HS- epoxy, 2K PU and HS 2K PU coatings/primers.
0.1-1.0
280 W
Silicone
■
Defoamer for high gloss coating,coating systems, excellent compatibility
0.1-1.0
290 W
Silicone
■
Excellent effectiveness against micro-foam in airless/airmix
0.1-1.0
292W
Silicone
■
Strong high shear stable defoamer for grinding processes, industrial coatings and ink with good compatibility and easy incorporation
0.1-1.0
295 W
Silicone
■
Strong high shear stable defoamer for grinding processes
0.1-1.0
LP2500
Silicone
■
Strong high shear stable defoamer for grinding processes, good compatibility
0.1-1.0
LP2510
Silicone
■
Economical silicone containing WB defoamer for architectural applications
0.1-1.0
LP2560
Silicone
■
Emulsified silicone defoamer with excellent compatibility, suited for clear and pigmented systems
0.1-1.0
Ink
TDS
UNIQ®FOAM
CHEMISTRY
DOSAGE(%)
SB
WB
FEATURES
7045
Non-silicone
0.1-1.0
■
Strong effective defoamer, suitable clear varnish
7087
Non-silicone
0.1-1.0
■
Excellent compatibility, suitable for high solid formulation
7098
Non-silicone
0.3-3.0
■
Anti-foaming and anti-poping in baking system, good leveling
7108
Silicone
0.2-1.0
■
Good compatibility, suitable for high gloss coating
7119
Silicone
0.1-1.5
■
Effective foam release and defoaming property
Plastics
TDS
UNIQ®FOAM
CHEMISTRY
FEATURES
DOSAGE(%)
P-509
Non-silicone
Strong anti-foam and air-release agent especially suitable for ambient curing systems, eg Unsaturated polyester and epoxy based systems.
0.1-1.0
P-540
Non-silicone
Silicone-free polymer-based air release additive for unsaturated polyester resins and gel coats.
0.1-1.0
P-555
Non-silicone
Strong silicone-free polymer-based air release additive for solvent free unsaturated polyester resins, gel coats and cast resins
0.1-1.0
P-570
Silicone containing
strong anti‐foam and air‐release agent especially suitable for ambient‐curing plastic systems, adhesives and sealants and coating industry. Especially suitable for epoxy based systems.
0.1-1.0
P-571
Non-silicone
strong anti‐foam and air‐release agent especially suitable for ambient‐curing systems, adhesives, sealants, PVC plastisols, UPE, gel-coats and coating industry. Especially suitable for self leveling epoxy flooring based systems, also suited for Clear epoxy systems
0.1-1.0
P-575
Non-silicone
strong anti‐foam and air‐release agent especially suitable for ambient‐curing plastic systems, adhesives and sealants and coating industry. Especially suitable for epoxy based systems.
0.1-1.0
P-595
Non-silicone
Strong anti-foam and air-release agent especially suitable for ambient curing systems, eg Unsaturated polyester and epoxy based systems.