描述

Product Name	Optical brightener OB (C.I. 184 / C.I.28 )
MF	C26H26N2O2S
EINECS No	230-426-4
CAS No	7128-64-5, 4404-43-7
Chemical Name	2,5-bis(5-tert-butyl benzoxazoly-2’-)thiophene
Appearance	Light green powder
Purity	≥98%
Melting point	198~202 °C
Volatile:	<0.5%
Package	20kg per carton, 25/30kg per fiber drum with PE liner, or as per the customers’ requirements.
Applications: It is widely used in thermoplastic such as PVC, PE, PP, ABS, PS, and unsaturated resin and paint, ink and oil soluble coatings.
Properties: The product is light green or green powder, non-toxic and tasteless, can dissolve in alkane, fat, mineral oil, paraffin and most organic solvents, the absorption spectra of the largest value for 375 mm (in ethanol).
Dosage: PVC whitening: 0.01~0.05%; Polystyrene :0001~0.001%; Polyolefin matrix: 0.0005~0.001% Printing ink: 0.05- 0.5%		to improve the light intensity: 0.0001~0.001% ABS:0.01~0.05%; White matrix: 0.005~0.05%

Optical Brightener OB