Dispersing Agent, Solvent-borne, Speciality Additive

VP 6820 UV speciality matte powder dispersant

The UV speciality matte powder dispersant (designated by CAS No: 6820) represents a pinnacle in additive technology for high-performance ultraviolet-curable coating systems. In the demanding environment of UV curing, where rapid polymerization can often lead to surface irregularities and pigment flocculation, this dispersant acts as a critical interface between the resin matrix and inorganic matting agents. It is primarily composed of high-molecular-weight polymeric architectures featuring tailored anchoring groups that exhibit a strong affinity for silica and micronized waxes. By providing robust steric stabilization, the dispersant ensures that matting particles remain uniformly distributed throughout the film, preventing re-agglomeration during the cross-linking phase. This results in a consistent, low-gloss finish with exceptional optical clarity and mechanical durability. Furthermore, its role in optimizing rheological properties allows formulators to achieve high loading levels of matting agents without compromising the application viscosity or the final haptic properties of the cured substrate.

Attributes

Key Features and Benefits

Enhanced Matting Efficiency: Maximizes the performance of silica and waxes, allowing for lower filler loading.
Viscosity Reduction: Significantly lowers millbase viscosity, facilitating easier processing and high-speed application.
Steric Stabilization: Prevents flocculation and sedimentation of solids during both storage and the rapid UV curing process.
Excellent Transparency: Maintains the clarity of the underlying substrate without the haziness often associated with high matte levels.
Improved Surface Properties: Enhances scratch, mar, and burnish resistance while providing a smooth, soft-touch tactile feel to the finished coating.

Specifications

Technical Highlights

Chemical Composition: High-molecular-weight block copolymer with specific pigment-affinic functional groups.
Active Matter: Formulated as a 100% active solids content or in UV-reactive monomer carriers to ensure zero VOC emissions.
Compatibility: Demonstrates broad compatibility with epoxy acrylates, polyester acrylates, and urethane acrylate oligomers.
Thermal Stability: Exhibits high resistance to thermal degradation during the extrusion phase of UV-curable powder production.
Particle Size Optimization: Facilitates the achievement of narrow particle size distributions (D90 < 10µm) for high-definition matte finishes.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

UV-Curable Wood Coatings: Ideal for parquet flooring and furniture finishes requiring a durable, consistent low-gloss aesthetic.
Electronic Consumer Goods: Used in coatings for mobile devices and laptop casings to provide anti-glare and premium soft-touch finishes.
Automotive Interiors: Applied to plastic interior components and trim to reduce sun glare and improve surface haptics.
Graphic Arts and Packaging: Specifically for matte overprint varnishes (OPVs) and luxury packaging applications.
Industrial Metal Finishes: Used in coil coatings and appliance finishes where uniform matte appearance and chemical resistance are mandatory.