Dioxazine Violet 23 Pigment for Plastic Coating and Painting - High Color Intensity and Durability

Overview‌

Dioxazine Violet 23 (CAS 6358-30-1), a carbazole dioxazine derivative, represents the gold standard for high-performance violet pigments in industrial coatings, automotive finishes, and premium plastics. Renowned for its extraordinary color strength and exceptional durability, this pigment delivers a deep, reddish-violet hue that outperforms conventional violet colorants in critical metrics such as lightfastness, thermal stability, and chemical resistance. Engineered for applications where color integrity and longevity are non-negotiable, Dioxazine Violet 23 is the preferred choice for formulators seeking uncompromising vibrancy in harsh environments.

‌Technical Specifications‌

‌Certifications‌:

• REACH Compliant (EC No. 228-767-1)
• RoHS/ELV Directive Compliant
• FDA 21 CFR 178.3297 (indirect food contact)
• ECO PASSPORT by OEKO-TEX® Certified

‌Key Performance Advantages‌

‌1. Exceptional Chromatic Intensity‌

• ‌Color Strength‌: 30–40% higher tinting power vs. quinacridone violets.
• ‌CIE Color Coordinates‌:
  • L*: 25–30 (ultra-saturated tone)
  • a*: 40–45 (intense reddish bias)
  • b*: -20 to -25 (clean blue undertone)
• Achieves full opacity at 0.5–1.0% loading in most resin systems.

‌2. Unmatched Durability‌

• ‌UV Resistance‌: ΔE <1.2 after 2,000 hrs QUV-A exposure (SAE J2527).
• ‌Chemical Stability‌:
  • Resistant to 5% HCl, 3% NaOH, and glycol ethers.
  • No migration in plasticized PVC (tested at 80°C/30 days).
• ‌Heat Resistance‌: Stable in powder coatings cured at 200°C for 30 mins.

‌3. Universal Compatibility‌

• ‌Resin Systems‌:
  • Epoxies, polyurethanes, acrylics (solvent-borne & waterborne).
  • Compatible with PC, ABS, and nylon engineering plastics.
• ‌Ink Formulations‌:
  • UV-curable, gravure, and flexographic systems.
  • Meets ISO 2846-5 standards for process colors.

‌4. Environmental Compliance‌

• Halogen-free (<50 ppm), APEO-free formulation.
• Zero detectable PAHs (EPA Method 8270).
• Compliant with Toy Safety Standard EN 71-3 (heavy metals <10 ppm).

‌Manufacturing Innovations‌

Produced via ‌Advanced Cyclocondensation Technology‌:

1. ‌Dioxazine Core Synthesis‌:
   • Controlled reaction of chloranil with aminocarbazole derivatives.
   • Solvent recovery efficiency >99.5%.
2. ‌Crystal Optimization‌:
   • β-phase stabilization through solvent milling.
   • XRD-confirmed crystallinity >95%.
3. ‌Surface Engineering‌:
   • Plasma treatment for enhanced dispersibility.
   • Anti-settling agents added during micronization.

‌Quality Assurance Protocols‌

• ‌Color Consistency‌:
  • Spectrophotometric batch matching to ΔE <0.5 (D65/10° observer).
  • Real-time particle size monitoring via laser diffraction.
• ‌Purity Standards‌:
  • ICP-MS verified heavy metals (Pb <2 ppm, Cd <0.5 ppm).
  • Residual solvent content <50 ppm (GC-MS validated).
• ‌Performance Testing‌:
  • 12-month accelerated weathering in multiple resin matrices.

‌Applications Across Industries‌

‌1. Automotive Coatings‌

• ‌Basecoat Systems‌:
  • Metamerism index <0.8 under multiple light sources.
  • DOI (Distinctness of Image) >90% after curing.
• ‌Interior Plastic Coatings‌:
  • Adhesion strength >4B (ASTM D3359) on PP/TPO substrates.
  • Resistant to sunscreen and hand cream chemicals.

‌2. Industrial Plastic Coatings‌

• ‌Extrusion Coatings‌:
  • Hue stability maintained at 220–240°C processing temperatures.
  • ≤0.02% warpage in ABS injection molding.
• ‌Powder Coatings‌:
  • Charge decay time <2.5 sec (EN 60335).
  • Gloss retention >85% after 1,500 hrs QUV-B exposure.

‌3. Architectural Paints‌

• ‌Exterior Wall Finishes‌:
  • Rain erosion resistance >80 cycles (ISO 20566).
  • Mold resistance Grade 0 per ASTM D3273.
• ‌Roof Coatings‌:
  • Solar reflectance >22% (Cool Roof Rating Council compliant).

‌4. Specialty Applications‌

• ‌Artistic Paints‌:
  • Color permanence verified by ASTM D4303 (75-year rating).
• ‌Cosmetic Packaging‌:
  • Compliant with EU Regulation 1223/2009.

‌Environmental & Safety Profile‌

• ‌Eco-Toxicity‌:
  • OECD 202 Daphnia magna EC50 >100 mg/L.
  • Readily biodegradable (OECD 301F: 28-day degradation <15%).
• ‌Occupational Safety‌:
  • OEL-TWA 8hr: 1 mg/m³ (ACGIH guidelines).
  • Non-hazardous transport classification (UN 3077).

‌Customization Options‌

• ‌Surface Treatments‌:
  • Silane coupling agents for enhanced polymer adhesion.
  • Hydrophobic grades for moisture-resistant films.
• ‌Concentrate Formats‌:
  • 50% pigment load in universal masterbatches.
  • Pre-dispersed liquid forms (35% solids in polyurethane resin).
• ‌Regulatory Packages‌:
  • EU Ecolabel and China GB/T 31817 compliance kits.

‌Supply Chain Excellence‌

• ‌Packaging‌: 15kg moisture-resistant foil bags with desiccants.
• ‌Global Network‌: 12 regional hubs with RFID inventory tracking.
• ‌Lead Times‌: 12–15 days standard; expedited options available.

‌Technical Support Ecosystem‌

• Free color matching software with 20,000+ formulation database.
• On-demand dispersion optimization guides.
• Accelerated weathering certificates (ISO 4892-3).
• 24/7 multilingual technical helpline.

‌Market Validation‌

• Adopted by 3 luxury automotive brands for interior trims.
• 2024 PCI Innovation Award for "Best Niche Pigment".
• 25% faster dispersion vs. competitive dioxazine pigments.

‌Future Innovations‌

• ‌Nano-Encapsulated Grades‌: Enhanced UV resistance via SiO₂ hybrids.
• ‌Thermochromic Variants‌: Reversible color shift at 60–80°C.
• ‌Bio-Based Dispersants‌: 35% plant-derived surfactant systems.

‌Conclusion‌

Dioxazine Violet 23 Pigment redefines the boundaries of violet color technology, offering an unmatched synergy of chromatic intensity, environmental compliance, and application versatility. Whether applied to automotive finishes requiring decades of fade resistance, architectural surfaces battling extreme climates, or premium plastic coatings demanding flawless aesthetics, this pigment consistently exceeds the most rigorous industry standards. Backed by advanced manufacturing processes and global technical support, it empowers formulators to meet evolving demands for sustainable, high-performance coatings while maintaining cost efficiency. As industries increasingly prioritize longevity and eco-consciousness, Dioxazine Violet 23 stands as the definitive choice for manufacturers committed to excellence in both color science and environmental stewardship.