Shandong Zhongyang Chemical Co., Ltd.
Optical Brightener KSB
Classification :
PRODUCT DETAILS
Optical Brightener KSB (FBA 369)
1. Basic Information
Fluorescent Brightener KSB is a benzoxazole-type fluorescent whitening agent. Its full chemical name is 2,2'-(1,4-naphthalenediyl)bis(5-methylbenzoxazole). It is a high-efficiency whitening and brightening agent specially developed for plastics and synthetic fibers.
2. Physical and Chemical Properties
Item | Specification |
Product Name | Fluorescent Brightener KSB |
C.I. No. | C.I. Fluorescent Brightener 369 / C.I. 369 |
CAS No. | 1087737-53-8 |
Density | Approx. 1.25 g/cm³ |
Boiling Point | 240–245 °C (Alternative data: 386–390 °C, excellent thermal stability) |
Appearance | Yellowish-green crystalline powder, non-toxic and odourless |
Chemical Formula | C₂₆H₁₈N₂O₂ |
Melting Point | 269–271 °C (Thermal stability: ≥295 °C) |
Shade | Bright and pure blue-violet fluorescence |
Solubility | Insoluble in water; soluble in high-boiling organic solvents such as trichlorobenzene and dioctyl phthalate |
Fineness | 200–300 mesh, good dispersibility |
3. Key Performance Features
High whitening efficiency with low dosage: The recommended dosage is only 0.005%–0.05% by weight of raw materials, much lower than traditional brighteners. It greatly improves whiteness, enhances vividness and effectively covers substrate yellowing.
Superior heat resistance for high-temperature processing: It withstands temperatures above 280 °C. Suitable for injection molding, extrusion, film blowing and other high-temperature processes without decomposition, yellowing or migration.
Excellent light and weather fastness: Rated Grade 8 for light fastness. It resists UV rays, sunlight and weathering, and will not fade or turn grey after long-term service, making it ideal for outdoor products.
Excellent compatibility: It has great compatibility with PVC, EVA, TPR, PU foam, PP, PE, ABS, PC, polyester, polyamide and other resins. It does not react with foaming agents or crosslinkers, causes no bleeding or extraction, and keeps intact the mechanical properties and transparency of finished products.
Wide application for special scenarios: It delivers outstanding performance on EVA/PE foamed plastics, and can whiten recycled PP/PE materials to relieve yellowing issues.
4. Application Scope
Plastics: PVC films, calendered films, injection molded parts, extruded profiles, foamed PVC, EVA foams, TPR elastomers, PU foams, PP/PE films and woven bags, ABS/PC engineering plastics and PPS products.
Synthetic fibers: Whitening and brightening for polyester fibers, polyester blended fabrics, polyamide (nylon) and polyacrylonitrile.
Others: Coatings, natural varnishes, silk and wool fabrics. It can be added directly or in the form of masterbatch to fit various production processes.
5. Application Method
Dosage: Add 0.005%–0.05% of KSB by weight of plastic or fiber raw materials. Use the upper limit for light-coloured products requiring high whiteness. The dosage can be moderately increased for dark products or recycled materials, with a maximum of 0.1%.
Mixing: Blend KSB with raw materials at high speed for 5–10 minutes before processing (injection molding, extrusion, spinning, film blowing) to ensure uniform dispersion. It is also available to prepare masterbatch with a concentration of 2%–5% in advance for better dispersion.
Processing Temperature: Keep the temperature below 280 °C and avoid prolonged exposure to high temperature.
Factory Description
Equipped with advanced equipment and precise detection technology, and supported by sufficient capital, the company provides customers with high-quality optical brighteners and pigment products, and customizes exclusive product solutions according to customer needs. Covering an area of more than 2,000 mu, the company has built a number of standardized production workshops and professional laboratories. Based on complete experimental facilities, it can provide customers with accurate application data support, and ensure stable goods supply with large-scale production capacity.
Our Advantages
1. With our own manufacturing facilities, R&D center, and laboratories, we ensure consistent and reliable quality for products including optical brightening agents, titanium dioxide, solvent dyes, and pigments.
2. We provide OBA products and comprehensive whitening solutions with full technical support throughout the process.
3. Factory direct sales offer prices 3%-5% lower than market rates.
4. Rapid delivery with same-day shipping available.
5. Custom packaging options for optical brighteners, titanium dioxide, solvent dyes, pigments, and more based on client requirements.
6. Complimentary samples provided for testing comparative effects and cost-effectiveness.
7. Prompt response to inquiries with professional and efficient service.
8. Flexible payment options including TT, LC, and other settlement methods.
9. Complete customs clearance documentation backed by years of export experience.
10. DDP door-to-door service with real-time tracking of logistics updates.
Package information
Standard packaging is 25 kg in cardboard drums, cartons, or bags lined with double-layer PE film. Customized packaging is also available upon customer request.
Transportation and storage
Transportation: Fluorescent whitening agents should be protected from impact and direct sunlight during transportation.
Storage: Store in a cool, dry, and well-ventilated warehouse. Shelf life is two years.
FAQ
Q: Are your products suitable for use in synthetic fibers, plastics, detergents, coatings, inks, textiles, and paper?
Q: How about after-sales service?
Q: What documents can you provide?
Q: Can you ship to Southeast Asia and Africa?
Q: Which ports do you ship from?
Q: How long is the lead time?
Q: What payment terms do you accept？
Q: What is your standard packaging?
Q: Can you provide samples?
Q: What is your MOQ?
Q: Are prices negotiable?
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Qihe Economic Development Zone (Industrial Park), Shandong Province