Solvent Yellow 145

Solvent Yellow 145 (C.I. Solvent Yellow 145) is a high-performance fluorescent solvent dye, prized for its brilliant greenish-yellow color. It is specifically engineered for demanding applications in advanced engineering plastics and specialty inks where high thermal stability and vivid fluorescence are required.

Key Properties and Applications

1. Core Performance Characteristics

· Fluorescent Effect: Produces an exceptionally vivid, eye-catching greenish-yellow shade that significantly enhances visual brightness and appeal.

· Excellent Heat Resistance: It offers outstanding thermal stability suitable for high-temperature plastic processing. Key temperature limits are:

· Up to 300°C for Polycarbonate (PC), Polyethylene Terephthalate (PET), and Polystyrene (PS).

· Up to 280°C for Polymethyl Methacrylate (PMMA) and Acrylonitrile Butadiene Styrene (ABS).

· Superior Lightfastness: Achieves a high lightfastness rating of 6-7 on the Blue Scale (where 1 is poor and 8 is excellent) in transparent plastics, ensuring good color retention for outdoor use.

· Good Migration Resistance: Exhibits a migration fastness of 4-5 (where 1 is poor and 5 is excellent) in most recommended resins, minimizing the risk of color bleeding.

· Solubility Profile: It is insoluble in water and has low solubility in common organic solvents (<10 g/L). This property allows it to color plastics primarily through fine dispersion within the polymer melt.

2. Primary Application Scope It functions primarily as a high-grade colorant for engineering plastics:

· Highly Recommended For: Transparent or high-performance plastics like PC, PMMA, PS, ABS, and SAN.

· Suitable For: PET and PBT fibers.

· Not Recommended For: PA66/PA6 (Nylon).

3. Regulatory Compliance According to manufacturer information, certain products comply with standards such as EN71-3 (Toy Safety), EN71-9 (Organic Compounds), and AP(89)1 (Food Contact Plastics Testing). Verification of specific compliance certificates with your supplier is essential before use.

Usage Notes and Operational Advice

1. Critical Identifier: The primary and most widely accepted CAS Number is 27425-55-4. Exercise caution with other CAS numbers (e.g., 67905-17-3), as they may refer to different substances.

2. Dosage: For a bright, transparent tint, the recommended dosage is very low, typically 0.02% to 0.05%. Higher amounts or combination with titanium white (approx. 0.1%) are used for opaque effects.

3. Key Precautions:

· Conduct Pre-Testing: Always perform lab-scale trials with your specific polymer batch and under your processing conditions to confirm color and performance.

· Respect Temperature Limits: Despite its good heat resistance, prolonged exposure at the maximum recommended temperature can lead to color shifts.

If you require more detailed information on its use in ink formulations or a comparison with similar dyes like Solvent Yellow 98, I can provide further analysis.

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