PC Black Masterbatch is a functional masterbatch developed to solve problems of traditional PC products such as uneven black color, easy graying under high-temperature processing, and impaired impact strength from ordinary carbon black. These traditional PC products include electronic device enclosures, automotive central control parts, and industrial instrument panels. It focuses on endowing products with uniform deep black appearance, long-term UV resistance and processing stability while preserving PC’s excellent high-temperature resistance, high impact strength and weather resistance, providing solutions for electronic manufacturing, automotive industry and industrial instruments. It uses high-purity medium-viscosity PC resin as carrier with a melt flow rate of 8-15g/10min, ensuring over 98% compatibility with various PC substrates to avoid carbon black agglomeration or performance decay, while maintaining substrate mechanical properties (tensile strength ≥64MPa, Izod impact strength ≥58kJ/m²).
Its core components include high-purity nano-carbon black: surface-modified furnace black (particle size 15-25nm, oil absorption 95-125mL/100g, addition 25%-40%), achieving L value ≤12 and 96%-99% light-shielding rate; UV-resistant additives: blended carbon black and HALS (addition 2%-5%), maintaining ≥90% tensile strength after 2000h xenon aging; efficient dispersants: blended PC wax and fatty acid amide (addition 3%-7%), ensuring ≥98% dispersion via twin-screw precision mixing (260-290℃) and increasing melt flow rate by 10%-16%.
The masterbatch combines excellent high-temperature stability and weather resistance with wide scenario adaptability. Stable at -40℃-130℃, it works at PC processing temperatures with adjustable addition 5%-20%, preserving ≥95% heat distortion temperature and ≥85% low-temperature impact strength. It fits PC electronic enclosures, automotive central control parts, industrial instrument panels, and daily necessities, reducing defects and ensuring long-term reliability.
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