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High chroma and excellent color strength for vibrant, consistent red shades.
Outstanding thermal stability up to 260 °C, suitable for demanding processing conditions.
Good lightfastness and weather resistance in outdoor applications.
Excellent dispersibility in both solvent-based and water-based systems.
Low volatility and minimal extractables, supporting compliance with stringent regulatory requirements.
Automotive coatings (basecoats and clearcoats).
Industrial coil and can coatings.
Plastics coloring for injection-molded and extruded parts.
High-performance printing inks (gravure and flexo).
Architectural and protective coatings requiring durable red hues.
| Chemical Type | Quinacridone derivative |
| Product Form | Fine dry powder |
| Appearance | Red-violet free-flowing powder |
| Primary Applications | Coatings, plastics, inks |
| Key Features | Thermal stability, dispersion performance, color consistency |
| Benefits | Reduced batch variation, high tinctorial strength, low dusting |
| Regulatory Compliance | REACH registered; compliant with FDA 21 CFR §178.3297 for indirect food contact (when specified) |
Q1: What are the primary application areas for Sico Red L 3750?
A: Sico Red L 3750 is widely used in high-performance industrial coatings, automotive refinishes, and plastic coloration—particularly where strong red shade, excellent lightfastness, and good thermal stability are required. It is also suitable for selected ink systems demanding high chroma and dispersion stability.
Q2: How should Sico Red L 3750 be dispersed in coating or plastic systems?
A: Optimal performance requires thorough dispersion using high-shear equipment such as bead mills or extruders. Pre-treatment with compatible dispersants is recommended to achieve fine particle size distribution and maximize color strength and gloss. Dispersion conditions should be tailored to the specific resin matrix and processing temperature.
Q3: Is Sico Red L 3750 suitable for food-contact plastics or packaging inks?
A: Sico Red L 3750 is not approved for direct food-contact applications under major global regulatory frameworks. It is intended for non-food-contact industrial uses. Customers requiring food-safe colorants should consult BASF’s portfolio of compliant pigments and verify suitability with local regulatory guidance.
Q4: What is the typical dosage range for achieving full opacity or strong tinting strength?
A: Dosage depends on the substrate, desired shade intensity, and formulation requirements. In most polymer and coating systems, it is typically used at low concentrations—generally ranging from 0.1% to 2% by weight—to achieve strong red tones and good opacity.
Q5: How does Sico Red L 3750 compare to other high-performance red pigments in terms of weather resistance?
A: Sico Red L 3750 offers very good lightfastness and weather resistance, particularly in acrylic- and polyester-based systems. Its performance exceeds many conventional red azo pigments and approaches that of select high-stability quinacridone derivatives—making it a robust choice for outdoor-exposed coatings and durable plastic parts.
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E-mail: wangxingqiang@ericwchem.com
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