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CB-300 is a high-performance modified ultrafine precipitated barium sulfate developed by Yunfu Hongzhi New Materials Co., Ltd. using an exclusive sulfuric acid process with stringent control over crystallization parameters and multi-stage分级 filtration to ensure uniform particle size distribution. It features exceptional purity (≥95.0 wt% BaSO₄), ultrafine median particle size (D50 = 0.3 µm), high whiteness (≥98.0%), low oil absorption (18 g/100g), and surface modification with silica-alumina for enhanced compatibility. This product delivers superior dispersion, thermal stability, acid–alkali resistance, and absence of sulfides, odor, or black specks — critical for high-reliability applications. It is widely adopted in PCB solder mask inks, pigment dispersions, automotive OEM and refinish coatings, industrial maintenance paints, and engineering plastics where optical clarity, dimensional stability, corrosion resistance, and electrical safety are paramount.
1. Ultrafine D50 of 0.3 µm ensures high transparency and improved photosensitivity in UV-curable PCB inks.
2. Silica–alumina surface modification enhances resin compatibility, boosting adhesion, water resistance, and dispersion stability.
3. Low oil absorption (18 g/100g) allows higher filler loading, reducing coefficient of linear expansion in composites.
4. High purity (≥95.0% BaSO₄) and zero sulfide content guarantee electronic reliability and prevent circuit corrosion.
Store in a cool, dry, well-ventilated area away from direct sunlight and moisture. Shelf life is 24 months when sealed and stored under recommended conditions. Transport as non-hazardous general cargo; avoid contamination and physical damage during handling. For optimal dispersion, add during the grinding/milling stage at 10–35% loading relative to total solids. Use appropriate PPE (dust mask, gloves, safety goggles) when handling powder to minimize inhalation or skin contact; not classified as hazardous per GHS but avoid prolonged airborne exposure.; Storage condition: 20 kg bag; Shelf life: 20 kg bag; Pack size: 20 kg bag
