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Clariant KCB is an odorless yellow-green powder (purity ≥98%), insoluble in water. It has excellent light/heat resistance, no reaction with foaming agents, no exudation, and works well at 370nm. It delivers bright blue-white whitening at low dosage and enhances color of colored plastics.
Excellent light/heat resistance, suitable for high-temperature plastic processing and outdoor applications.
Good compatibility with foaming agents/crosslinking agents, no side reaction risk.
No exudation/extraction, ensuring long-term appearance stability of products.
Dual effect of whitening and color enhancing, effective for white/colored plastics.
Special effect on EVA/PE foam plastics, fitting foam product processing.
Suitable for whitening polyolefins, PVC, TPR, EVA and other general plastics.
Fits optical optimization of plastic films, laminated/injection molded products.
Used to improve whiteness and gloss of PU foam and synthetic rubber.
Applied in whitening coatings and natural lacquers with uniform natural effect.
Special whitening effect on EVA/PE foam plastics, suitable for foam products.
| Parameter | Specification / Value |
|---|---|
| Appearance | Yellow-green powder |
| Shade | Bright blue-white |
| Volatile Content | ≤ 0.5 % |
| Melting Point | 237 - 239 °C |
| Fineness | ≥ 100 mesh |
| Purity | ≥ 98 % |
| Odor | Odorless |
| Water Solubility | Insoluble in water |
| Max Absorption Wavelength | 370 nm |
| Recommended Dosage | 5 - 50 g per 100 kg material |
| Special Application | EVA / PE foam plastics |
Q1: What is the primary application field for this fluorescent brightener?
A: This product is specifically developed for use in polymer systems, particularly polyolefins such as PP and HDPE, where enhanced whiteness and brightness are required in injection-molded, extruded, or blow-molded articles.
Q2: Is this brightener thermally stable under standard polymer processing conditions?
A: Yes, it exhibits good thermal stability suitable for conventional melt-processing temperatures of polyolefins, including extrusion and injection molding. Performance remains consistent without significant degradation or yellowing when processed within typical polymer processing windows.
Q3: How is the brightener typically incorporated into the polymer matrix?
A: It is commonly added via masterbatch dilution or direct dry-blend with polymer resin prior to processing. Good dispersion can be achieved using standard compounding equipment, and compatibility with common polyolefin carriers is well established.
Q4: Does this product offer UV resistance or photostability in end-use applications?
A: While it provides initial brightness enhancement, long-term photostability depends on the overall formulation—including UV stabilizers and antioxidants. For outdoor or high-UV exposure applications, co-addition of appropriate UV absorbers or HALS is recommended to maintain performance.
Q5: What regulatory status should users consider for food-contact or medical-grade applications?
A: Regulatory compliance is formulation- and region-specific. Users must evaluate suitability based on applicable local regulations and intended end-use; Clariant provides technical documentation to support regulatory submissions, but final approval rests with the compounder or brand owner.
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