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High thermal stability suitable for demanding processing conditions up to 250 °C.
Excellent lightfastness and weather resistance in outdoor applications.
Good dispersibility in both aqueous and solvent-based systems.
Consistent batch-to-batch color reproducibility and hue strength.
Compliant with major global regulatory frameworks including REACH and RoHS.
Automotive coatings (basecoats, clearcoats, and plastic parts).
Industrial coil and can coatings requiring high durability.
Plastic coloration for engineering resins including ABS, PS, and PC.
High-performance inks for packaging and labeling.
Architectural and protective coatings for façades and metal structures.
| Chemical Type | Azo pigment (disazo) |
| Product Form | Free-flowing powder |
| Appearance | Brown powder with reddish undertone |
| Primary Applications | Coatings, plastics, inks |
| Key Features | Thermal stability, lightfastness, dispersibility |
| Benefits | Color consistency, regulatory compliance, processing robustness |
| Particle Size (D50) | Approx. 0.15–0.25 µm |
| Volatile Matter (105 °C) | ≤ 1.0 wt% |
Q1: What is the primary chemical class of POLYSYNTHREN Brown 3RL?
A: POLYSYNTHREN Brown 3RL is an organic pigment based on a monoazo structure, specifically engineered for high tinctorial strength and excellent dispersion stability in demanding polymer systems.
Q2: Is this pigment suitable for food-contact plastics?
A: POLYSYNTHREN Brown 3RL is designed for use in non-food-contact applications. It is not approved for direct food-contact applications under major global regulatory frameworks, and users must conduct full regulatory due diligence—including migration testing and compliance verification—before considering any food-related use.
Q3: How does POLYSYNTHREN Brown 3RL perform in polyolefin masterbatches?
A: It demonstrates very good thermal stability and dispersion behavior in polyolefin-based masterbatches, especially during high-shear compounding at typical processing temperatures up to 260 °C. Its optimized particle size distribution supports consistent color development and low filter pressure buildup.
Q4: What is the recommended dosage range for achieving optimal color strength and dispersion?
A: Dosage depends on formulation requirements and desired shade intensity, but it is typically used at low concentrations—generally ranging from 0.1% to 2% by weight in final polymer compounds—to balance cost efficiency, color consistency, and processing performance.
Q5: Can POLYSYNTHREN Brown 3RL be used in engineering thermoplastics such as polyamide or polycarbonate?
A: Yes—it exhibits good compatibility and thermal stability in several engineering thermoplastics, including polyamide and polycarbonate, provided processing conditions remain within recommended temperature limits and adequate dispersion protocols are followed during compounding.
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E-mail: wangxingqiang@ericwchem.com
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