Special Black Pigment for Primer - Excellent Coverage and Durability

Special Black Pigment is a premium-grade carbon black engineered specifically for primer formulations requiring uncompromising coverage, substrate protection, and long-term durability. With a finely tuned particle structure and surface modification, this pigment delivers jet-black coloration while enhancing the functional performance of industrial, automotive, and marine primers under extreme environmental conditions.

‌Core Performance Attributes‌

‌Ultimate Coverage Efficiency‌
The pigment’s ultra-fine particle size (primary particles 15–25 nm, aggregates 200–300 nm) combined with a high surface area (180–220 m²/g, BET method) achieves 99.5% light absorption at 550 nm wavelength. In full-shade primer systems, it provides hiding power of ≤20 μm dry film thickness (ISO 6504-3), outperforming conventional furnace blacks by 30–40% in opacity. The controlled structure (DBP absorption: 120–140 mL/100g, ASTM D2414) ensures optimal spacing between particles, maximizing substrate coverage with reduced pigment loading (4–6% typical dosage).

‌Advanced Durability Profile‌

• ‌Corrosion Resistance‌: Enhances salt spray performance to 1,500+ hours (ASTM B117) in epoxy primer systems
• ‌Chemical Stability‌: Resists immersion in pH 2–12 solutions (ISO 2812-1) and hydrocarbon solvents (ASTM D1308)
• ‌Thermal Endurance‌: Stable up to 300°C (DIN 53775) for powder-coated primers requiring high-temperature curing
• ‌UV Protection‌: Carbon matrix structure blocks 98% UV-A/UV-B radiation (ISO 16474-3), preventing substrate degradation

‌Processing Advantages‌
Surface-treated with proprietary oxidation technology, the pigment demonstrates exceptional dispersion characteristics (Hegman grind ≤8 μm, ASTM D1210) in both solvent-borne and water-based systems. Low viscosity impact (≤20% increase at 6% loading) maintains spray application viscosity under HVLP conditions. Compatible with all major resin types including:

• Epoxy/polyamide systems for metal substrates
• Alkyd primers for wood protection
• Polyurethane tie-coats for composite materials

‌Application-Specific Benefits‌

‌Automotive Primers‌

• Meets OEM adhesion standards (GM 9505P, Ford BI 169-09)
• Provides E-coat compatibility with throw power ≥80% (ASTM D7640)
• Enables stone-chip resistance per GMW14700 Grade A

‌Industrial Maintenance‌

• Zinc-rich primers achieve 95% zinc dispersion (ASTMD6580)
• Compatible with inorganic silicate systems for high-temperature substrates
• Reduces pinhole formation in high-build applications (≥250 μm DFT)

‌Marine & Offshore‌

• Passes NORSOK M-501 cyclic testing (25 cycles)
• Enhances cathodic protection in underwater coatings
• Resists biofouling when combined with cuprous oxide

‌Aerospace‌

• Meets Boeing BMS 10-83 Type II chromate-free specifications
• Maintains dielectric properties for radar-absorbing coatings
• Withstands thermal cycling (-65°C to +150°C, MIL-STD-810)

‌Technical Specifications‌

• ‌Color Index‌: C.I. Pigment Black 7
• ‌CAS No.‌: 1333-86-4
• ‌Volatile Content‌: ≤1.5% (ISO 787-2)
• ‌Ash Content‌: ≤0.2% (ISO 1125)
• ‌pH Value‌: 6.5–8.5 (5% aqueous dispersion)
• ‌Conductivity‌: 1,500–2,000 μS/cm (ISO 787-14)

‌Formulation Guidance‌

‌For Water-Based Primers‌

• Pre-disperse using polyacrylate dispersants (30–40% active)
• Mill with zirconium silicate beads (1.0–1.2 mm diameter)
• Adjust conductivity with <2% glycol ethers

‌In Solvent Systems‌

• Optimize wetting with 0.5–1.0% phosphate ester additives
• Use high-shear mixing (≥2,000 rpm) for deagglomeration
• Balance rheology with hydrophobic fumed silica

‌Powder Coating Integration‌

• Premix with 2–3% flow control agents before extrusion
• Maintain extrusion temperature ≤120°C
• Post-add 0.1–0.3% carbon black masterbatch for tone adjustment

‌Sustainability & Compliance‌

• REACH registered with full SDS disclosure
• PAHs content ≤0.1 ppm (IP 346 method)
• Carbon footprint: 1.2 kg CO₂/kg pigment (cradle-to-gate LCA)
• Manufacturing process utilizes 90% recycled thermal energy

‌Packaging & Storage‌

Available in 25 kg multi-walled paper/PE bags with UV-resistant outer layer. Bulk quantities supplied in 1,000 kg FIBC containers featuring moisture-proof liners. Store in dry conditions (<40% RH) at 15–25°C to maintain dispersibility. Shelf life: 36 months from production date.

‌Technical Support Services‌

• Substrate-specific primer formulation development
• Electrochemical impedance spectroscopy (EIS) testing
• Accelerated corrosion testing per ASTM B117/G85
• Dispersion optimization workshops

Special Black Pigment redefines primer performance by combining intense black coloration with multi-functional protective properties. Its engineered particle morphology addresses critical challenges in modern coating systems – from preventing underfilm corrosion in automotive applications to withstanding extreme weathering in offshore environments. For formulators seeking to build primer systems that exceed industry durability benchmarks while maintaining application efficiency, this pigment delivers uncompromising performance across all technical parameters.

TDD-Global.com is a professional China chemical B2B marketplace operated by IBI Company, dedicated to promoting global communication, business negotiation, and market expansion in the chemical industry. With a strong network of China chemical product suppliers and international buyers, TDD-Global creates a dynamic and efficient platform for sourcing, trading, and cooperation.

Under the brand name TUDUODUO, TDD-Global has built a trusted reputation among suppliers and buyers in sectors such as fine chemicals, raw materials, industrial additives, and advanced chemical solutions. We offer a wide range of services including product listing, online promotion, supply chain solutions, and international marketing support.

Our platform connects hundreds of verified China chemical suppliers with buyers worldwide, fostering transparent transactions, better business opportunities, and high-value partnerships. Whether you are looking for bulk commodities, specialty chemicals, or customized procurement services, TDD-Global is your go-to platform.

Driven by the innovative spirit of IBI Company, we are committed to building a smarter, faster, and more reliable global chemical trade ecosystem.

If you are interested in cooperation, strategic partnerships, or customized chemical sourcing, please feel free to contact us. Let's shape the future of the chemical industry together!