Yellow Benzimidazolone Organic Pigments - Non-Toxic Yellow Pigment for Industrial Use

‌Product Overview‌

Yellow Benzimidazolone Organic Pigments represent a premium class of monoazo-based colorants engineered for critical industrial applications requiring ‌non-toxic operation‌, ‌extreme durability‌, and ‌regulatory compliance‌. With a unique molecular architecture combining benzimidazolone heterocycles with tailored substituents, these pigments deliver CIE Lab* coordinates of L=85–90, a=–5 to +5, b=90–110, achieving intense yellow hues unmatched by conventional diarylide alternatives. Certified heavy metal-free and REACH/APEO-compliant, they are ideal for food-contact packaging, toy coatings, and architectural systems where safety and color retention are paramount.

‌Molecular Design & Synthesis‌

‌1. Chemical Structure‌

• ‌Core framework‌: Benzimidazolone-coupled monoazo structure (C.I. Pigment Yellow 151/154/175/181 variants).
• ‌Key functional groups‌:
  • Sulfonamide groups (-SO₂NH₂): Enhances polarity for improved polymer compatibility.
  • Chlorine/methyl substituents: Tunes crystal morphology for specific opacity requirements.

‌2. Manufacturing Process‌

1. ‌Diazo Reaction‌:
   • Coupling of 5-aminobenzimidazolone with acetoacetarylide derivatives under pH 5.5–6.5.
2. ‌Condensation & Crystallization‌:
   • Controlled temperature ramp (0.5°C/min) to form β-crystal phase for optimal stability.
3. ‌Surface Treatment‌:
   • Resin stabilization (20–30% acrylic/polyurethane coating) to prevent flocculation.

‌Technical Specifications‌

‌Performance Advantages‌

‌1. Optical Excellence‌

• ‌Color Strength‌: 20–30% higher tinting power vs. Hansa Yellow analogs (ASTM D4838).
• ‌Gloss Retention‌: 85+ (60° gloss) after 3,000h QUV-B exposure (ISO 16474-3).
• ‌Metamerism Index‌: <0.5 (CIE 15:2004) for precise color matching in automotive OEM systems.

‌2. Durability Metrics‌

• ‌Lightfastness‌:
  • 8 (Blue Wool Scale) at 1/3 SD in PE (ISO 105-B02).
  • ΔE<1.0 after 5,000h Xenon-arc weathering (SAE J2527).
• ‌Chemical Resistance‌:
  • Withstands 10% HCl/NaOH (24h immersion, no bleeding).
  • Immune to plasticizers (DOP, DINP) in PVC applications.

‌3. Regulatory Profile‌

• ‌Food Safety‌: Compliant with FDA 21 CFR 178.3297 for food-contact polymers.
• ‌Eco-Certifications‌:
  • ECO PASport (phthalate-free verification).
  • EU Ecolabel for indoor decorative paints.
• ‌Toxicology‌:
  • Ames test negative (OECD 471).
  • Acute oral toxicity LD50 >5,000 mg/kg (OECD 423).

‌Industrial Applications‌

‌I. Coatings & Inks‌

1. ‌Automotive OEM/Refinish‌

   • High-chroma basecoats for yellow accent trims (meeting GMW 14872 weatherability).
   • Electrodeposition primers resistant to phosphate baths.

2. ‌Architectural Systems‌

   • Exterior emulsion paints with 15-year color warranty (Master Painters Institute MPI #X632.1).
   • Anti-graffiti coatings maintaining hue integrity after chemical cleaning.

3. ‌Packaging Inks‌

   • FDA-compliant flexo inks for snack wrappers and frozen food cartons.
   • UV-curable formulations for beverage labels (low migration certified).

‌II. Plastics & Polymers‌

1. ‌Engineering Resins‌

   • Heat-stable coloration for nylon 6/6 (processing at 280–300°C).
   • Laser-markable grades for automotive interior trim (contrast ratio >85%).

2. ‌Films & Fibers‌

   • Transparent films for agricultural mulch (retains 90% UV screening after 3 seasons).
   • PP fiber dyeing with >7/8 wash fastness (AATCC Test Method 61-2020).

3. ‌Elastomers‌

   • Non-blooming in silicone rubber gaskets (ASTM D3182 compliance).
   • FDA-compliant coloration for baby bottle nipples and medical tubing.

‌III. Specialty Applications‌

1. ‌Cosmetics‌

   • Lakes for lipstick formulations (CI 11741, EU Annex IV compliant).
   • Non-irritating eye shadow pigments (HRIPT tested).

2. ‌Artistic Media‌

   • Lightfast grades for artist oils/acrylics (ASTM D4303 Category I).
   • Archival-quality printmaking inks (Wilhelm Imaging Research 100+ year rating).

‌Formulation Guidelines‌

‌1. Polymer Systems‌

• ‌Recommended Loadings‌:
  • PVC: 0.8–1.5%
  • Polyolefins: 0.3–0.6% with dispersing agents
  • Engineering resins: 0.5–1.0% pre-compounded masterbatches

‌2. Paint Systems‌

• ‌Waterborne Optimization‌:
  • Combine with AMP-95 for pH stabilization (target 8.5–9.0).
  • Use polymeric dispersants (30–40% active) at 1:1 pigment ratio.

‌3. Ink Systems‌

• ‌UV/EB Curing‌:
  • Pre-disperse in acrylated oligomers (CN104/CN991 series).
  • Maintain viscosity <3,000 cP for screen printing applications.

‌Quality Assurance‌

• ‌Certifications‌: ISO 9001:2015, ISO 14001:2015, Ecovadis Silver Medal
• ‌Batch Consistency‌:
  • Color deviation ΔE<0.8 (D65/10°)
  • Particle size distribution D90/D10 ratio <5:1
• ‌Traceability‌: Lot-controlled manufacturing with full SDS documentation.

‌Packaging & Storage‌

• ‌Standard Units‌: 25 kg polyethylene-lined cartons
• ‌Bulk Options‌: 500 kg palletized containers with desiccant packs
• ‌Liquid Dispersions‌: 40% pigment load in water/glycol systems (non-hazardous)
  Store below 30°C at 40–60% RH; shelf life 36 months unopened.

‌Sustainability Features‌

• ‌Bio-based Alternatives‌: 30% renewable carbon content options available.
• ‌Waste Reduction‌: Closed-loop solvent recovery in synthesis process (98% efficiency).
• ‌Carbon Neutrality‌: 0.6 kg CO₂e/kg pigment (35% below industry benchmark).

‌Competitive Differentiation‌

1. ‌Thermal Edge‌: Stable at temperatures 40°C higher than conventional monoazo yellows.
2. ‌Regulatory Leadership‌: Full compliance with China GB 9685 and Japan JHOSPA standards.
3. ‌Application Versatility‌: Suitable for solvent-free powder coatings and water-based systems alike.
4. ‌Technical Support‌: Custom surface treatments (silicone, fluoropolymer) available.

‌Conclusion‌

Yellow Benzimidazolone Organic Pigments redefine performance standards for industrial colorants, merging vibrant aesthetics with rigorous safety protocols. Their engineered molecular structure ensures unmatched resistance to fading, heat, and chemical exposure while maintaining full regulatory compliance across global markets. From weather-resistant automotive coatings to child-safe toy colorations, these pigments empower formulators to meet escalating demands for durability and eco-responsibility. Backed by ISO-certified manufacturing and cutting-edge technical support, they represent the intelligent choice for forward-thinking industries seeking to balance chromatic excellence with sustainable practices.

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