Wollastonite Powder for Marine Anti-Fouling Primers

Kmeris^@ GHF02 Wollastonite Powder is a high-performance functional filler engineered from high-purity natural wollastonite ore. Leveraging our advanced ultra-fine powder processing technology, GHF02 features a unique acicular (needle-like) and fibrous crystal morphology, delivering exceptional physical and chemical properties. It serves as a premium alternative to comparable imported grades (Analogous to Sibelco F75) and is specifically developed for high-end applications, with particular emphasis on ship anti-fouling primer coatings where crack prevention is critical.

Physical parameters

Key Features & Advantages

High Aspect Ratio Structure: The acicular particle shape forms an interlocking network within coating films, significantly enhancing impact resistance, crack resistance, and flexibility. This structural reinforcement effectively prevents film cracking caused by mechanical stress or thermal expansion/contraction.

Superior Physicochemical Stability:

High Whiteness & Purity: Provides a clean, bright base tone without interfering with pigment color strength.

Lack of Water of Crystallization: With a melting point of approximately 1540°C, it releases no structural water even under extreme heat, ensuring volume stability and preventing blistering or cracking in high-temperature or fluctuating environments.

Low Coefficient of Thermal Expansion: Closely matches most resin systems, minimizing internal stress within the coating during temperature cycling.

Excellent Corrosion & Weathering Resistance: Chemically inert and resistant to acids, alkalis, and UV degradation, significantly extending coating service life in harsh marine and industrial environments.

Balanced Mechanical Performance: With a Mohs hardness of 4.5–5, it improves abrasion resistance while remaining gentle on processing equipment. Its good electrical insulation properties also suit specialty functional coatings.

Primary Applications

• Ship Anti-Fouling Primers (Core Application): GHF02 is specifically formulated for anti-fouling primer systems. Its high aspect ratio provides essential crack-bridging functionality, accommodating the thermal and mechanical deformation of steel hulls. This ensures long-term adhesion between the primer and substrate, forming a durable foundation for subsequent anti-fouling topcoats.

• Industrial & Architectural Coatings: Ideal for exterior wall paints, automotive primers, powder coatings, and anti-corrosion systems, where it boosts film mechanical strength, weather resistance, and anti-cracking performance.

• Other Industrial Sectors: Equally suitable as a reinforcing filler in plastics (enhancing rigidity and heat resistance), rubber (improving reinforcement), ceramic bodies and glazes, electronic encapsulation materials, papermaking fillers, adhesives, and sealants.

Package and Storage

25 kg/bag, 500 kg/ bag (FIBC)

Store in a cool, dry, and well-ventilated area, protected from direct sunlight and moisture. Keep packaging sealed and store on pallets away from the ground to prevent contamination and humidity absorption.