Pigments for Rubber and Polymer Applications

Enhancing Polymer Aesthetics and Function

Deqing Demi Pigment Technology Co., Ltd. is a key supplier of robust coloring solutions for the diverse rubber and polymer industries. Our pigments are engineered to withstand the mechanical stress and thermal conditions of polymer processing, ensuring uniform color distribution throughout molded and extruded articles. We focus on providing high-stability colorants that maintain their hue and intensity over the full service life of the polymer product, whether used in automotive components, consumer goods, or cabling.

Target Polymer and Rubber Uses

• Plastics Extrusion: Coloring PVC profiles, pipes, and electrical conduit.
• Masterbatch Production: High-concentration color compounds for subsequent dilution in polymers.
• Rubber Products: Tires, footwear soles, seals, gaskets, and synthetic turf backing.
• Injection Molding: High heat-stable grades for durable plastic parts and housings.

Polymer Processing Performance Data

Specific Polymer & Rubber Benefits

• Thermal Resistance: Maintains color integrity and chemical structure through high-shear, high-temperature processing.
• Dispersion Ease: Optimized particle shape and size reduce the grinding and mixing energy required in compounders and extruders.
• No Migration: The insoluble nature of inorganic pigments prevents bleeding or blooming in the polymer matrix.
• Chemical Inertness: Does not react with curing agents, accelerators, or stabilizers common in rubber formulations.

• Q: What is the maximum processing temperature these pigments can tolerate?

  A: Our standard grades are thermally stable up to approximately 180∘C to 200∘C. We offer specialized, calcined high-temperature stable grades that can endure processing temperatures exceeding 280∘C for demanding engineering plastics.

• Q: Are these pigments suitable for use in transparent or translucent polymers?

  A: Due to their high opacity, inorganic iron oxide pigments are primarily used to create opaque or solid-colored polymer and rubber products. For translucent effects, other classes of pigments or dyes are generally recommended.

Process Optimization and Particle Engineering

We employ advanced micronization techniques to create pigments with extremely fine and uniform particles, significantly improving the speed and quality of color dispersion in complex polymer resins and elastomers.

Custom Surface Modification: We can provide pigments with tailored surface treatments (e.g., silane or organic coatings) to improve compatibility with specific non-polar polymer systems, enhancing adhesion and final product mechanical properties.

Achieving Consistency in Compounding

In polymer applications, color is often measured in thick parts (injection molding) or thin films (extrusion). We focus on the "mass tone" and the "let-down" strength. Mass tone refers to the color of the pure pigmented material, while let-down strength measures the color when the pigment is diluted (e.g., in a masterbatch). Our CIELab and tinting strength data are specifically optimized to ensure linear and predictable color control during the dilution process in the compounding extruder, critical for minimizing color changes during processing.