Product Description
Optical Brightener KCB (C.I. 367) is a high-purity yellowish-green crystalline powder (≥99.9%) designed to enhance the brightness and whiteness of synthetic fibers and plastics. Chemically known as 1,4-bis(benziazolyl-2-yl-)naphthalene, KCB produces a bluish tinge, masking yellowness and creating a clean, whiter-than-white appearance in finished products.
Advantages
- Provides excellent brightening efficiency for synthetic fibers and plastics
- Adds a bluish tinge, effectively masking yellowing
- Environmentally friendly and non-toxic
- Ideal for foaming plastics, especially EVA and PE foams
- High thermal stability (melting point 210–212 °C) with low volatility (<0.5%)
Applications
Optical Brightener KCB (C.I. 367) is widely used in:
- Plastics & Foaming Materials: Polyolefin, PVC, PVC foaming, TPR, EVA, PU foaming
- Plastic Films & Laminates: Injection molding, lamination, and molded products
- Coatings & Natural Lacquer: Enhances whiteness and visual appeal
- Synthetic Fibers: Improves brightness and appearance of fibers
Special note: KCB shows outstanding performance in foaming plastics, especially EVA and PE foaming products.
Dosage
- Typical usage: 0.01–0.03%
- Example: For 100 kg of material, add 10–30 g of KCB
- Can be adjusted based on product requirements or testing results
Physical & Chemical Properties
| Property | Specification |
|---|---|
| Product Name | Optical Brightener KCB (C.I. 367) |
| CAS Number | 5089-22-5 |
| EINECS Number | 225-803-5 |
| Other Name | 1,4-bis(benziazolyl-2-yl-)naphthalene |
| Molecular Formula | C24H14N2O2 |
| Appearance | Yellowish green crystalline powder |
| Purity | ≥99.9% |
| Melting Point | 210–212 °C |
| Volatile Matter | <0.5% |
Packaging
- 20 kg per carton
- 25/30 kg per fiber drum with PE liner
- Custom packaging available per customer requirements
Storage & Shelf Life
- Store in a cool, dry place
- Protect from light
- Shelf life: up to 24 months
Why Choose Optical Brightener KCB (C.I. 367)?
✅ Superior Brightness: Produces whiter-than-white appearance for plastics and fibers
✅ Bluish Tinge Effect: Masks yellowing effectively in finished products
✅ Eco-Friendly & Safe: Non-toxic and environmentally safe
✅ High Efficiency: Works exceptionally well in foaming plastics, especially EVA and PE
✅ Flexible Usage: Dosage can be adjusted for specific product requirements
