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High thermal stability suitable for processing temperatures up to 300 °C.
Excellent lightfastness and weather resistance in demanding outdoor applications.
Outstanding dispersibility in both polar and non-polar polymer systems.
Good migration resistance in polyolefins and engineering plastics.
Compliant with major global regulatory frameworks including EU REACH and US FDA 21 CFR for selected applications.
Coloration of polypropylene (PP) and polyethylene (PE) fibers and films.
Automotive interior plastics requiring long-term UV and heat stability.
Engineering thermoplastics such as ABS, PC, and PA for durable consumer goods.
Masterbatch formulations for high-performance industrial packaging.
| Chemical Type | Quinacridone derivative |
| Product Form | Fine crystalline powder |
| Appearance | Red-violet free-flowing powder |
| Primary Applications | Polyolefins, engineering plastics, masterbatches |
| Key Features | Thermal stability, lightfastness, dispersion efficiency |
| Benefits | Consistent color strength, low dust generation, process robustness |
| Recommended Processing Method | Extrusion, injection molding, fiber spinning |
Q1: What is the primary chemical class and pigment type of Hostaperm A4R?
A: Hostaperm A4R is a high-performance perylene-based organic pigment, classified under the C.I. Pigment Red 179 category. It exhibits strong red-shade hue with excellent lightfastness and thermal stability, making it suitable for demanding polymer and coating applications.
Q2: In which polymer systems is Hostaperm A4R most commonly processed?
A: This pigment demonstrates good dispersibility and stability in engineering thermoplastics such as polyamide (PA6, PA66), polybutylene terephthalate (PBT), and polyethylene terephthalate (PET). It is also used in high-temperature processing applications including injection molding and extrusion, where thermal resistance is critical.
Q3: How does Hostaperm A4R perform under outdoor exposure conditions?
A: Due to its perylene structure, Hostaperm A4R offers outstanding resistance to UV radiation and weathering. When properly formulated and dispersed, it maintains color strength and chroma over extended periods in outdoor applications—particularly in automotive exterior parts and durable consumer goods.
Q4: Is Hostaperm A4R suitable for food-contact or medical-grade polymers?
A: Hostaperm A4R is not pre-approved for direct food-contact or implantable medical applications. Its suitability for regulated end uses depends on full formulation compliance, migration testing, and final regulatory review by the responsible party. Clariant provides technical support for regulatory documentation upon request.
Q5: What are typical dosage ranges and dispersion recommendations?
A: Dosage typically ranges from 0.1% to 2% by weight depending on the substrate and required opacity or chroma. Optimal performance requires robust dispersion—preferably using high-shear compounding or masterbatch techniques—to ensure uniform distribution and maximize coloristic and stability properties.
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