Pigment Yellow 151 — Benzimidazolone Yellow for High-Performance Coatings

Pigment Yellow 151 – Benzimidazolone Yellow for High-Performance Coatings

H1: Overview of Pigment Yellow 151 (PY 151)

Pigment Yellow 151, classified under the Benzimidazolone chemical family (CI 13980, CAS 31837-42-0), is a high-performance organic yellow pigment specifically engineered for demanding coating applications. With a bright greenish-yellow shade and excellent fastness properties, PY 151 is a key component in automotive OEM coatings, industrial paints, and high-durability plastic systems.

This pigment is supplied globally under multiple commercial grades, including HP 1618, 4G, HP 13110, PIGMENT YELLOW 151, 颜料黄4G, H4GP, HP YELLOW 1618, and HP YELLOW 1618J. These grades share consistent technical performance while offering slight variations in particle size distribution and surface treatment to optimize for different resin systems and processing methods.

Key suppliers and shipment data (based on 2023–2024 trade records):
– 争妍 (Zhengyan): 29 shipments, total 520 kg
– 南通市埃唯卡/争妍 (Nantong Aweika/Zhengyan): 15 shipments, total 1,480 kg
– 山东华宝 (Shandong Huabao): 3 shipments, total 790 kg
– 高邮华贝 (Gaoyou Huabei): 3 shipments

H2: Technical Specifications of Pigment Yellow 151

H3: Chemical & Physical Properties

H3: Coloristic Properties

H3: Fastness Properties

Source: Technical data sheets from HONOR Pigment and supplier quality reports

H3: Performance in Coating Systems

• Automotive OEM clearcoat: Excellent durability, minimal fading after 1000 hours QUV.
• Industrial baking systems: Stable at 180°C for 30 minutes without color shift.
• Powder coatings: Compatible with polyester/TGIC and epoxy/polyester hybrids.
• Waterborne coatings: Good dispersion and stability in acrylic and polyurethane systems.

H2: Application Scenarios for Pigment Yellow 151

H3: High-Performance Coatings (Primary Application)

PY 151 is specifically designed for high-performance liquid and powder coatings that require exceptional lightfastness and chemical resistance. This includes:

• Automotive OEM and refinish: Used in solid yellow and in blends with other organic pigments for two-coat metallic systems. Its strong greenish shade complements Phthalo Blue to create brilliant greens.
• Industrial machinery and equipment: Coating for agricultural machinery, construction equipment, and heavy-duty tools where UV stability and gloss retention are critical.
• Coil coatings: Suitable for exterior building panels requiring 10+ year durability.
• Powder coatings: A standard pigment in polyester-based systems for outdoor furniture, railings, and automotive trim.

Why PY 151 over alternatives?
Compared to Monoazo yellows (PY 1, PY 3, PY 74), PY 151 offers significantly higher lightfastness and weather resistance. In contrast to the more expensive Isoindolinone yellows (PY 110), PY 151 provides a cost-effective balance between performance and price, especially in high-volume automotive applications.

H3: Plastics Processing

While coatings are the primary market, PY 151 also serves in engineering plastics and PVC/PE masterbatch applications:

• ABS and PC/ABS: Color retention after 3000 hours in accelerated aging tests.
• Polyamide (PA6, PA66): Good heat stability during injection molding.
• PVC profiles: Suitable for window frames and siding where UV stability is required.

H3: Other Niche Applications

• Artist colors and sign paints: Used in premium oil and acrylic paints for its brightness and permanence.
• Printing inks: High-durability packing inks for outdoor packaging.

H2: Frequently Asked Questions (FAQ)

H3: Q1: What is the main difference between Pigment Yellow 151 and Pigment Yellow 154?

Pigment Yellow 154 (CI 11785) is also a benzimidazolone yellow but with a slightly redder shade compared to PY 151. PY 151 has better lightfastness in full shade and higher heat stability (220°C vs. 180°C for PY 154). For automotive exterior coatings, PY 151 is the preferred choice; PY 154 is more economical for interior applications.

H3: Q2: Can Pigment Yellow 151 be used in food contact materials?

No current certification supports food contact use for PY 151. The pigment is designed for industrial and automotive coatings, not for food packaging or tableware. For food contact areas, consult HONOR Pigment’s compliance team for alternative solutions.

H3: Q3: What is the recommended dispersion method for PY 151 in solvent-based coatings?

For optimal color strength and transparency, a pre-dispersion step is recommended. Use a high-shear disperser at 3000–4000 rpm for 15–20 minutes in a solvent/pigment ratio of 4:1 (solvent to pigment). Alternatively, a bead mill with 0.5–1.0 mm zirconia beads at 2000–2500 rpm for 30–45 minutes produces the finest particle distribution.

H2: Related Products and Internal Links

Explore HONOR Pigment’s full Benzimidazolone Yellow portfolio:

• Pigment Yellow 154 – For Cost-Effective Coatings
• Pigment Yellow 180 – High-Hiding Yellow for Plastics
• Pigment Yellow 110 – Isoindolinone High-Performance Yellow

Browse all Organic Yellow Pigments for high-performance coatings:
– Yellow Pigments Category

For technical support or sample requests, contact HONOR Pigment’s application engineering team.

Data compiled from HONOR Pigment internal quality reports and supplier shipment records. Performance ratings are based on standard laboratory tests under controlled conditions. Actual results may vary depending on formulation and processing. HONOR Pigment does not certify products for specific regulatory compliance unless explicitly stated in a signed agreement.