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High thermal stability suitable for demanding polymer processing conditions.
Excellent lightfastness and weather resistance in outdoor applications.
Good dispersibility in both polar and non-polar media, including polyolefins and PVC.
Low migration tendency, ensuring color consistency and compliance in regulated applications.
Consistent batch-to-batch reproducibility supported by Clariant’s stringent quality control.
Coloration of polypropylene (PP) and polyethylene (PE) fibers and films.
Industrial coatings requiring durable brown shades with UV stability.
Plastic packaging components where food-contact compliance is not required.
Automotive interior plastics exposed to elevated temperatures and prolonged light exposure.
Engineering thermoplastics such as ABS and polycarbonate blends.
| Chemical Type | Azo pigment (disazo) |
| Product Form | Fine powder |
| Appearance | Free-flowing reddish-brown powder |
| Primary Applications | Polyolefins, PVC, coatings, engineering plastics |
| Key Features | Thermally stable, lightfast, low-migration |
| Benefits | Consistent hue, easy dispersion, high opacity |
| Regulatory Status | Compliant with EU REACH; not intended for food-contact use |
| Storage Conditions | Store in cool, dry place away from direct sunlight |
Q1: What is the primary chemical nature of Polysynthren Brown R?
A: Polysynthren Brown R is an organic pigment based on azo chemistry, specifically formulated as a high-performance, thermally stable brown pigment dispersion suitable for demanding polymer and coating applications.
Q2: Is Polysynthren Brown R suitable for use in polyolefins such as PP and PE?
A: Yes — it is widely used in polyolefin applications, including injection molding and blow molding of PP and HDPE, due to its excellent heat stability, low volatility, and good dispersion behavior during melt processing.
Q3: How does Polysynthren Brown R perform under UV exposure and weathering conditions?
A: It offers good to very good lightfastness and weather resistance in many polymer matrices, particularly when stabilized appropriately; performance may vary depending on film thickness, base resin, and presence of UV stabilizers.
Q4: What is the typical dosage range for achieving full opacity in standard polymer applications?
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 — with optimal results achieved through dispersion optimization and compatibility testing.
Q5: Can Polysynthren Brown R be used in water-based systems?
A: Yes — it is available in aqueous dispersion grades designed for waterborne coatings and inks, offering good stability and compatibility with common rheology modifiers and co-binders.
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E-mail: wangxingqiang@ericwchem.com
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