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Substrate wetting additive STD-249

Composition: Polyether modified silicone oil

Appearance: light yellow viscous liquid

Active ingredient: 100%

Solvent: NoneScope of Application:

Suitable for waterborne wood coatings, waterborne industrial coatings and UV light curing coatings, inks and other systems

CategoryDetails
Product Name STD-249 Silicone-Based Wetting Additive
Chemical Type Polysiloxane copolymer with hydrophilic modification
Key Applications –Low-Surface-Energy Substrates: Fluoropolymers, silicones
–High-Temperature Coatings: Powder coatings, ceramic inks
–Composite Materials: Carbon fiber, glass fiber sizing
Function Reduces interfacial tension for uniform liquid penetration
Advantages –Wetting Speed: Rapid spread on PTFE/PET within 5 sec
–Thermal Stability: Effective up to 250°C
–Chemical Resistance: Inert to acids/bases
Technical Data –Appearance: Clear amber liquid
–Active Content: 60%
–Viscosity: 200-500 cPs
–Surface Tension: 21 mN/m @1% concentration
Usage Guidelines –Add Rate: 0.2-1.5% by weight
–Mixing: High-speed dispersion
–Storage Temp: -20°C to 40°C
Performance –Contact Angle Reduction: From >110° to <20° on silicone rubber
–Reworkability: Retains activity after 3 freeze-thaw cycles
Safety –Handling: Avoid contact with eyes
–Flash Point: >100°C
–Disposal: Incinerate per local regulations
Certifications Complies with FDA 21 CFR 175.300 for food contact coatings

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