Optical brightener KCB

  • Product name: Optical Brightener KCB
  • Chemical Name: 2,2′-(1,4-naphthalenediyl) Bisbenzoxazole
  • C.I.:  367
  • CAS: 5089-22-5
  • Molecular Formula: C24H14O2N2
  • Formula Weight: 362.68
  • Synonyms: Hostalux KCB, KCB-C (DyStar), OBA 367, FBA KCB
    Optical Brightening Agent KCB
  • Application: Optical Brightener KCB is widely used in the whitening of synthetic fiber, and EVA foam for footwear materials. It is also suitable for whitening PE, PP, PVC, PS, ABS, paints, etc.
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1. Properties of Optical Brightener KCB

Appearance: Yellowish green crystal powder
Purity: ≥99%
Melting point: 201.1-202.2℃
Volatile ≤0.5%
Ash ≤0.5%
Max Absorption Wavelength 370nm (in ethanol)
Max. Emission Wavelength 437nm(in ethanol)

Optical Brightener KCB chemical structure

Optical Brightener KCB chemical structure

Optical brightener KCB is poorly soluble in water, and soluble in alkane, mineral oil, and common organic solvents.

2. Synonyms / Alternative

Hostalux KCB, KCB-C (DyStar), OBA 367, FBA KCB
Optical Brightening Agent KCB

3. Packing and Storage

25KG fiber drum lined with a double-layer plastic bag.
Stored in a cool, dry, and ventilated place, the storage term should not exceed 2 years.

4. Common Application and Recommend Dosage

Optical Brightener KCB is widely used in the whitening of synthetic fiber and plastics such as PE, PP, PVC, PS, ABS, paints, etc.  KCB is the first choice for whitening EVA foam for footwear materials. It can also enhance the brightness and vividness of colored plastics. It has strong light stability and heat resistance and is chemically stable, not react with other plastic additives such as foaming agents, or coupling agents.

Dosage in plastics 0.01-0.03%, or adjust according to user’s need.

Due to the dosage amount is small, please mix thoroughly for the best effect.
When using any UV absorb additive, the dosage of optical brightener KCB should be adjusted.

5. Transportation and Safty

Avoid inversion, sunlight, moisture, and crash. Avoid damaging the package.
Non Hazardous. Stock as ordinary chemicals. Wear Protective goggles and gloves while using. And avoid direct contact with skin and eyes. Soap clean if the skin is contaminated.

Shandong Grand Chemical Co., Ltd, is a professional manufacturer of optical brighteners in China.
If you have any inquiries about the optical brightener for plastics, please do not hesitate to contact us via sales@obachemical.com, or WhatsApp: +86 13173009832.

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