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Pigment Carbon Black Dispersion

Updated: 2026-08-17

Overview

Pigment Carbon Black Dispersion is a premixed formulation where fine carbon black particles are uniformly distributed in a liquid medium (water or solvent). It eliminates the need for end-users to disperse dry carbon black powder, which can be challenging due to its tendency to agglomerate. The dispersion typically contains 20-50% carbon black by weight, along with dispersants and stabilizers to maintain homogeneity. This ready-to-use product significantly reduces processing time and improves consistency in final products. It's particularly valuable in industries where uniform color distribution and ease of handling are critical. The carbon black used is usually furnace black or channel black with carefully controlled particle sizes ranging from 10 to 100 nanometers.

Physical and Chemical Properties

The physical properties of carbon black dispersion depend on both the carbon black itself and the carrier liquid. Carbon black provides exceptional light absorption, with a jet-black color and high tinting strength. The particles have a large surface area (typically 20-150 m²/g), contributing to their excellent hiding power and UV protection capabilities. Chemically, carbon black is relatively inert but can oxidize at high temperatures. The dispersion's viscosity ranges from 500 to 10,000 cP, depending on concentration and formulation. pH values typically fall between 7-10 for water-based dispersions. Key performance indicators include dispersion stability (resistance to settling), fineness of grind (usually <10 microns), and compatibility with various resin systems.

Main Applications

In the coatings industry, carbon black dispersion provides deep black coloration for automotive finishes, industrial coatings, and architectural paints. Its UV absorption properties help protect substrates from sunlight degradation. The ink industry utilizes it for printing inks, especially in packaging and publication gravure inks where intense black is required. Plastics manufacturers incorporate carbon black dispersions for coloring and UV stabilization in products ranging from pipes to automotive parts. In the rubber industry, it serves as both a pigment and reinforcing filler. Other applications include toners for photocopiers and laser printers, fiber coloration, and specialty applications like conductive coatings.

Safety and Storage

While carbon black itself is classified as a Group 2B carcinogen (possibly carcinogenic to humans) by IARC when in powder form, the dispersion form significantly reduces dust exposure risks. However, proper ventilation and personal protective equipment (gloves, goggles) should still be used during handling. Storage requires protection from freezing and excessive heat. Containers should be kept tightly closed to prevent evaporation of the carrier liquid or contamination. Shelf life is typically 6-12 months when stored properly. In case of spills, absorb with inert material and dispose of according to local regulations. Water-based dispersions may require biocides to prevent microbial growth.

B2B Procurement Guide

When procuring carbon black dispersion, clearly specify your application requirements. Key parameters to consider include: carbon black concentration (solid content), particle size distribution, pH value, viscosity, and compatibility with your production system (water-based vs. solvent-based). Request technical data sheets and samples for testing. Evaluate dispersions for color strength, dispersion stability (no settling after storage), and ease of incorporation into your formulation. Consider suppliers who can provide consistent quality and technical support. For large volume purchases, negotiate based on carbon black content rather than total weight, as water or solvent makes up a significant portion of the product.

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