DOW DOWSIL 904H is a high-performance silicone coating additive with advanced thermo-mechanical attributes. The colorless transparent liquid (1,200-2,500 mPa·s) stays stable at pH 5-10 and ≤80°C, boosting leveling by 40% at 0.5%-3% dosage. ISO 9001/REACH-certified, it lessens orange peel defects and improves abrasion resistance (25% lower Taber wear index) in waterborne, solvent-based, and powder coatings.
Dynamic Leveling Ability: Nano-silicone particles remove brush/roller marks through surface tension gradient control.
Enhanced Scratch Resistance: Raises pencil hardness by 2 grades (per ASTM D3363).
Strong Chemical Stability: Withstands 72-hour immersion in 5% NaOH/10% HCl without discoloration.
Eco-Friendly Compliance: APEO/VOC-free, meeting GB 18582-2020 standards.
Excellent UV Durability: Maintains 90% gloss after 1,000-hour QUV-A aging.
Architectural Coatings: Improves latex paint flow for 30% quicker application.
Industrial Coatings: Prolongs epoxy floor coating service life by 50%.
Automotive Clearcoats: Reduces microfoam in waterborne varnishes and enhances gloss by 15%.
Powder Coatings: Achieves Ra≤0.3 μm surface smoothness in polyester/TGIC systems.
Wood Coatings: Cuts pinhole defects by 60% in UV-cured finishes.
Type | Silicone coating additive |
Appearance | Colorless transparent liquid |
Active Content | Polyether-modified polydimethylsiloxane (80-85%) |
Dynamic Viscosity | 1,200-2,500 mPa·s |
pH Range | 5-10 |
Density | 1.01-1.05 g/cm³ |
Surface Tension | 21.5 dyn/cm |
Flash Point | >100°C (closed cup) |
Thermal Stability | No stratification (80°C/24h) |
Recommended Dosage | 0.5%-3% (by total weight) |
Shelf Life | 24 months (sealed, 5-40°C) |
Packaging | 20kg/plastic drum or 200kg/steel drum |
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E-mail: wangxingqiang@ericwchem.com
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