OPTICAL BRIGHTENER OB-1
Basic Properties
| Formula | C28H18N2O2 |
| C.I. | 393 |
| CAS No. | 1533-45-5 |
| Chemical Name | 2,2'-(vinylenedi-p-phenylene)bisbenz oxazole |
| Chemical Composition | |
| Appearance | Yellowish green crystal powder |
| Melting Point | 357-361℃ |
| Volatile Content | 0.5% MAX |
| Ash Content | 0.5% MAX |
| Molecular Weight | 414.4 |
| Max UV Absorption Wavelength | 374 nm(ethanol) |
| Max Optical Emitting Wavelength | 343 nm |
| Specific Gravity (20ºC) | 1.35 |
| Vapor pressure (20ºC) | 10E-17 mbar |
| Mesh size: | ＞260 mesh |
SOLUBILITY (grams per 100 ml.)
| SOLVENT | SOLUBILITY (%) |
| Water | <0.01 |
| Methanol | <0.01 |
| Acetone | <0.01 |
| n-Hexane | <0.01 |
| Chloroform | <0.01 |
| N-Methyl-pyrrolidon | <1.0 |
| 1,1,1-Trichlorethane | <1.0 |
LIGHT FASTNESS IN VARIOUS SUBSTRATES:
VOLATILITY:
PROPERTY : OB-1 is an excellent diphenylethylene bisbenzoxazole type compound. It is dissoluble in water and has stable capability. And it also has good resistance to heat, sunlight, chlorine bleaching and migration. It has an ideal whitening effect on polyester fibers as well as polyester fiber-containing fabrics including polyester-cotton blend fabric.
It can be used to whiten various kinds of plastics such as ABS, PS, HIPS, PA, PC, PP, EVA, POM and rigid PVC.
With addition of optical brightener OB-1, poly amide fiber,nylon and polyester have significantly good whiteness. Mixed with this product, recycling polyester waste material, bottle material and slice flake will have a higher whiteness than before.
APPLICATION : OB-1 is used in polymer fibers especially polyester and polyamide fibers.
It is also widely used in PP, ABS, PS, HIPS, PA, PC, EVA, POM, Rigid PVC etc.
PROCEDUR
| PVC white 0.01-0.05% | transparent 0.0001-0.001%transparent 0.0001-0.001% |
| PS | white 0.001% |
| ABS | natural color 0.01-0.05% white 0.01-0.05% |
| PE/PP colorless 0.0005-0.001% white 0.005-0.05% | |
| POM | white 0.01-0.05% |
| PACKAGE | Fiber drum, carton box or plastic bag. 10kg, 20kg, 25kg per drum. |
| STORAGE | Should be stored in cool,dry and ventilate place, and storage time should not |
exceed 2 years
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