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Brief introduction:
Optical Brightener OB is a high molecular weight fluorescent whitening agent which significantly improves the whiteness in thermoplastics, printing inks, Lacquers, Manmade fiber etc.
Optical Brightener OB Produces very brilliant white with light reddish Blue effect to, which compensates for yellowing to. It has good light fastness in substrates, excellent resistance to heat, high chemical stability, Soluble in a wide range of organic solvents. It gives Brilliant, Bluish white effect.
Chemical Name: 2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene
CAS No: 7128-64-5
Molecular Formula: C26H26N2O2S
Molecular Weight: 430.56
Package: 25kg/drum, 375kg or 450kg/drum, 4.5mt/20’FCL
Item | Standard |
Appearance | Slight greenish yellow powder |
Purity(HPLC) | ≥99.00% |
Melting Point | 201-205°C |
Volatile Content | ≤0.50% |
Ash Content | ≤0.2% |
Transmittance | 450 nm ≥97.00% 500 nm ≥98.00% |
Properties:
1.hardly soluble in water, but soluble in paraffin, mineral oils and ordinary organic solvents.
2. Small consumption, strong whitening intensity, small consumption can bring a very good whitening result.
3. Wide service behavior, suitable for various kinds of plastic whitening.
4.Have a good compatibility with plastic, good resistance to high temperature and excellent light fastness and weathering resistance.
Application:
Optical brightener OB because of good compatibility with other plastics, can be used as below:
Storage Notes: Sealed stored in cold, dry, good ventilated place, avoid high temperature and moist.
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