Fluorescent Brightener OB
Fluorescent brightener OB
Chemical name: 2, 5 - two (5 - tert-butyl - 2 - benzo pbo) thiophene
Molecular formula: C26H26N2O2S
Molecular weight: 430
Inclusive of our 99.5% amount:
Outside view: light yellow crystalline powder
Melting point: 201-203 ° C
The maximum absorption wavelength of spectrum:375 nm (in ethanol)
Fluorescence emission wavelength: 435 nm (in ethanol)
The fluorescent brightener OB can be widely used in PVC, PS, ABS, PE , PP,etc.In China,it is one of popular
fluorescent brighteners bacause its excellent fluorescent brightening effect,thermal stability and little addition .
Furthermore, it is alsosuitable for the brightening of polyester fibers, coatings, paints, inks and acrylic acid. The
fluorescent brightener OB can be shared with dyes to produce the special brightness, which is especially effective
in the color formulation.
Dosage:Dosage of fluorescent brightener OB per 100 kg polymer (reference dosage)
PVC: white 0.01 0.05% (10 g) - 50 g)
Transparent 0.0001-0.001% - 1 g (0.1 g), and can improve the brightness of PVC)
PS: white 0.001% (1 g)
Transparent 0.0001-0.001% - 1 g (0.1 g)
ABS: ecru 0.01 0.05% (10 g) - 50 g (ABS can effectively eliminate inherent in yellow)
White 0.01 0.05% (10 g to 50 g)
PE, PP: colorless 0.0005-0.001% - 1 g (0.5 g)
White 0.005 0.05% (5 g to 50 g)
Other plastic: dosage can call for enquiry.
Any uv absorber is added in the polymer, adjust the amount of fluorescent brightener OB should be paid attention to
The brightener shall be thoroughly dispersed in the whole polymer due to little dosage, For being easier to achieve the
sufficient dispersion effect, it can add to brightener Concentrated masterbatch.