Shandong Zhongyang Chemical Co., Ltd.
Optical Brightener KSN
Classification :
PRODUCT DETAILS
Optical Brightener KSN
1. Basic Information
Fluorescent Brightener KSN is a high-efficiency stilbene bis-benzoxazole fluorescent brightener. As a premium whitening and brightening agent developed for polyester fibers and engineering plastics, it delivers much better overall performance than conventional OB-1.
2. Physical and Chemical Properties
Item | Specification |
Product Name | Optical Brightener KSN |
C.I. No. | C.I. Fluorescent Brightener 368 / C.I. 368 |
CAS No. | 5242-49-9 |
EINECS No. | 226-044-2 |
Density | 1.261 g/cm³ |
Boiling Point | 578.9 °C (at 760 mmHg) |
Appearance | Bright yellow powder |
Chemical Formula | C₂₉H₂₀N₂O₂ |
Melting Point | 269–271 °C (Thermal stability: ≥295 °C) |
Shade | Bright reddish blue, consistent with standard sample |
Solubility | Insoluble in water; soluble in high-boiling organic solvents such as trichlorobenzene |
Fineness | 200 mesh with excellent dispersibility |
3. Key Performance Advantages
Better whitening effect than OB-1: It achieves remarkable whitening and brightening effects on PET, PC, ABS, PVC, polyamide and other materials, effectively covering yellowing of substrates and significantly improving whiteness.
Low dosage and cost-effective: The normal dosage is only 0.01%–0.05% by weight of raw materials. The upper limit is recommended for products requiring high whiteness, which is far lower than common fluorescent brighteners.
Excellent heat resistance for plastic processing: It can withstand temperatures above 280 °C. Suitable for high-temperature processes including injection molding, extrusion, film blowing and fiber spinning, without decomposition, yellowing or migration.
Grade 8 light and weather fastness: Resistant to UV rays, sunlight and weather aging. It will not fade or turn grey during long-term outdoor use, ideal for outdoor plastic products and synthetic fibers.
Good compatibility: It is highly compatible with polyester, polyamide, polyacrylonitrile, polyphenylene sulfide (PPS), silk, wool fabrics and more. No bleeding or extraction occurs, and it will not affect the mechanical properties and transparency of finished products.
4. Application Scope
Plastics: PET films, PC/ABS engineering plastics, PVC products, injection molded parts, extruded profiles, blown films and PPS products.
Synthetic fibers: Whitening and brightening for polyester fibers, polyester blended fabrics, polyamide (nylon) and polyacrylonitrile.
Others: Silk fabrics, wool fabrics, coatings and natural varnishes. It can be added directly or in the form of masterbatch (concentration: 2%–5%) to adapt to various production processes.
5. Application Method
Dosage: Add 0.01%–0.05% of KSN by weight of plastic or fiber raw materials. The dosage can be moderately increased for recycled materials or dark systems, not exceeding 0.1%.
Mixing: Mix KSN thoroughly with raw materials at high speed for 5–10 minutes before injection molding, extrusion, fiber spinning or film blowing for uniform dispersion. Alternatively, prepare fluorescent brightener masterbatch 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