Shandong Aobo Chemical Fluorescent Whitening Agent OB-1: A High-Temperature Whit
Time：2025-10-23Views：
Fluorescent Whitening Agent OB-1 (CAS No.: 1533-45-5) is a core product of Shandong Aobo Chemical. With its high-temperature stability and broad compatibility, it has become a preferred choice in the plastic and chemical fiber industries. Below is the simplified key information for its application.
1. Core Features: High-Temperature Resistance as the CoreShandong Aobo Chemical Fluorescent Whitening Agent OB-1: A High-Temperature Whitening Tool and Application Guide
① Basic Parameters
It is a bright yellow crystalline powder with a purity of ≥98% (up to 98.5% for some grades); its melting point ranges from 350℃ to 355℃, decomposition temperature is ＞450℃, and it maintains stable performance even at a high temperature of 375℃.
② Key Performance
It has a maximum UV absorption wavelength of 374nm and an emission wavelength of 434nm, achieving both "whitening + brightening" effects; it is odorless, insoluble in water, soluble only in high-boiling organic solvents, and highly compatible with most polymers.
2. Application Fields: Covering High-Value Material Processing
① Plastic Industry (First Choice for High-Temperature Molding)
Applicable to polypropylene (PP), PVC, ABS, polycarbonate (PC), etc., and compatible with injection molding, extrusion, and compression molding processes. Example: Add 0.01%-0.03% OB-1 to PC sheet raw materials; after extrusion at 300℃, the whiteness of the sheet increases by 15%-20% without long-term yellowing.
② Chemical Fiber Industry (Professional Choice for Fiber Whitening)
Suitable for polyester, nylon, and polypropylene fibers; it can be added during fiber spinning modification or fabric post-treatment. It is resistant to chlorine bleaching and sunlight, ensuring blended fabrics remain bright after multiple washes. The recommended dosage is 0.01%-0.05% (0.02% specifically for polyester).
③ Polymerization Stage (For Pre-Whitening of Stock Solution)
It can be added to the polymerization process of polyester and nylon. The whitening agent embeds evenly into polymer chains, enabling uniform dispersion, long-lasting effect, and no migration—ideal for high-end chemical fibers and engineering plastics.
3. Usage Guide: Precise Operation to Ensure Effect
① Dosage Control (Avoid Overdosing Mistakes)
- Plastics (PP/nylon/PC): 75-200g per ton of material;
- Polyester fiber: 75-300g per ton of material;
- Transparent polystyrene: 25-50g per ton of material;
- Recycled materials/dark substrates: Dosage can be increased to 0.035% (small-batch testing required first);
- Key Note: Strictly control the dosage when using in LDPE and flexible PVC to prevent migration.
② Operation Specifications (Safe and Efficient)
- Mixing: Stir thoroughly with a high-speed mixer, or pre-mix with a small amount of resin for granulation—this prevents "color spots/white dots";
- Process: Adjust parameters according to the material’s melting point; avoid long-term ultra-high-temperature processing;
- Protection: Wear gloves and goggles. If it contacts the skin, rinse with soap and water; if it gets into the eyes, rinse with plenty of water and seek medical attention immediately.
4. Storage and Post-Use Handling: Full-Chain Quality Assurance
① Storage Conditions (Stable Storage for Extended Efficacy)
- Packaging: 25kg carton drums/woven bags, 500kg bulk bags (customizable);
- Environment: Store at room temperature, away from sunlight and moisture, and keep distant from heat sources/oxidants; do not stack too high;
- Shelf Life: 2 years (performance testing required if expired).
② Post-Use Handling (Compliance Assurance)
- Waste: Seal leftover materials; clean packaging can be disposed of as recyclable solid waste; packaging with large amounts of residues shall be handled by professional institutions;
- Effect Tracking: Regularly test the whiteness/light resistance of finished products; if abnormalities occur, check dosage, mixing uniformity, and processing procedures;
- Compound Use: If the effect of single OB-1 is poor, it can be compounded with other whitening agents (compatibility verification via small-batch testing required first).
