DOWSIL™ 71 Additive

Overview
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Technical Content
Technical Content
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Effective foam control for waterborne coatings performs at low concentrations no hydrophobic particles and stable under high shear mixing. Particularly for waterborne inks balancing effective foam control and good surface appearance.

Benefits:

100% organomodified silicones
Self-emulsifying
Easy to incorporate at low shear
Can be used neat or diluted in polar solvents
Compatibility with a wide variety of ink and OPV resins
Very low use levels
Excellent foam control during both manufacturing and processing
Shear stability
Continued performance even after long-term storage
Prevent defects, even on filmic subtrates
Compliant with U.S., European and certain local country regulations within Europe for food-contact applications

Properties

These values are not intended for use in preparing specifications.

Typical Properties

Active Content Yes No 100 %
Aqueous Systems Yes No true
Benefit Yes No Foam Control
Cloud Point (1 wt% actives aqueous solution) Yes No < 0 °C
Color Yes No Clear colorless to tan hazy liquid
Dynamic Viscosity Yes No 500 Centipoise
Flash Point, Closed Cup Yes No > 100 °C
Performance Benefits Yes No Compatibility, Foam Control
Product Delivery Yes No Polymer
Shelf Life Yes No 720 Days
Silicone HLB Content Yes No 1.31 %
Solventless Yes No true
Specific Gravity @ 25°C Yes No 1
Surface Tension (1% actives, 25 °C) Yes No 26.4 mN/m
System Yes No Water Borne
Target Formulation Yes No Water Borne

Additives for long-lasting, defect-free foam control in inks and overprint varnishes

Are you looking for a long-lasting foam control additive for your ink or overprint varnish (OPV) that performs during both the manufacturing and printing processes and does not cause surface defects, even on filmic substrates? Is storage stability a concern? Do you also need to meet regulatory requirements for various food-contact applications? Then consider DOWSIL™ 71 Additive and DOWSIL™ 74 Additive. These foam control agents provide excellent, long-lasting foam control at reduced use levels while maintaining the integrity of the coating, and they comply with U.S., European and certain local country regulations within Europe for food contact.

Unlike silicone emulsion products, DOWSIL™ 71 and 74 Additives are supplied as 100% organomodified silicones. They are low viscosity, surfactant-like compounds that self-emulsify and thus are easy to incorporate at low shear, while also avoiding any issues with emulsion instability. They are also highly effective in a wide range of acrylic resin formulations, providing excellent foam control at much lower use levels without causing cratering and other surface defects associated with silicone emulsions, even on non-absorbent filmic substrates.

Effective foam control at very low use levels

With their unique organomodified silicone structure, DOWSIL™ 71 and 74 Additives provide excellent foam control at much lower use levels than competitive emulsion technology.

Figure 1: DOWSIL™ 71 Additive, for example, can be used at nearly half the level of a silicone emulsion in a waterborne flexographic ink.

Graph: DOWSIL™ 71 Additive can be used at nearly half the level of a silicone emulsion in a waterborne flexographic ink

DOWSIL™ 71 Additive outperforms a silicone emulsion in a waterborne OPV after nine weeks of storage

Because it is self-emulsifying, DOWSIL™ 71 Additive continues to provide excellent foam control during printing even after long-term storage when used at up to five times less than a silicone emulsion (Fig 2.)

Figure 2: Storage performance of DOWSIL™ 71 Additive in a waterborne flexographic ink

Graph: Storage performance of DOWSIL™ 71 additive in a waterborne flexographic ink

DOWSIL™ 71 Additive provides a defect-free surface in a waterborne flexographic ink

Unlike silicone emulsions, which contain silica particles that can lead to defect formation, DOWSIL™ 71 and 74 Additives are highly organic in nature. They are compatible with a wide range of acrylic resins and provide defect-free surfaces.

Silicone emulsion defects vs. defect-free DOWSIL™ 71 Additive

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