Dow DOW Dowsil 67 water-based silicone wetting agent improves the wettability of water-based difficult-to-coat substrates

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Product Features and Benefits
• Low viscosity
• Low surface tension
• Imparts good ductility and wetting
• High flash point (> 100°C/> 212°F)
• Easily soluble in water

Application
• Improves wetting of difficult-to-coat substrates with waterborne coatings.
• Improves the wettability of water-soluble flexographic printing inks and gravure printing inks on high-smooth packaging materials such as polyethylene, polypropylene and polyethylene terephthalate.
• Reduces the amount of organic co-solvent used to improve wetting, improving print life.

Typical Physical Properties
(The following values ​​cannot be used for specification)

Application method
In ink formulations, the typical addition range of DOWSIL™ 67 Additive is 0.1%–1.0% by weight.
By comparing the equilibrium and kinetic surface tension of aqueous solutions, the surface mobility of DOWSIL 67 Additive can be expressed (as shown in Table 1).

Table 1: Equilibrium and kinetic surface tension of aqueous solutions
%         Equilibrium Surface Tension in Water (mN/m)         Dynamic Surface Tension (mN/m)
DOWSIL 67 Additive
0.01 22.7 54.0
0.1 21.1 34.0
1.0 20.7 23.1

Operation Precautions
This document does not contain product safety information required for safe use. Before use, please read the product, its safety data sheet and container labels for information on safe use, physical hazards and health hazards of the product. SAFETY DATA SHEET AVAILABLE FROM THE DOW WEBSITE AT WWW.CONSUMER.DOW.COM.CN OR FROM A DOW SALES APPLICATION ENGINEER OR DISTRIBUTOR, OR BY CALLING A DOW GLOBAL CONNECTION.

Storage and expiration date
Stored unopened below 30°C (86°F), the shelf life of the product is 24 months from the date of production.

Usage Restrictions
This product has not been tested or represented as suitable for medical or pharmaceutical use.

Health and Environmental Information
In order to help customers use products safely, Dow has set up strict product service organizations in various regions, and has a group of product safety and regulatory compliance experts to serve customers.
For details, please visit our official website consumer.dow.com.cn, or consult your local Dow representative.

Table 2: Effectiveness of DOWSIL 67 Additive as Wetting Agent
Polyethylene wets a droplet with a radius of 0.2 ml
% in water DOWSIL 67 Additive
0 0.30
0.01 0.76
0.1 1.65
1.0 1.90
(The surface energy of polyethylene is 22mN/m)

Table 2: Effectiveness of DOWSIL 67 Additive as Wetting Agent
Polyethylene wets a droplet with a radius of 0.2 ml
% in water DOWSIL 67 Additive
0 0.30
0.01 0.76
0.1 1.65
1.0 1.90
(The surface energy of polyethylene is 22mN/m)