Fluorescent Brightener OB (OBA 184) CAS NO.7128-64-5

Optical brightener OB is a kind of benzoxazole compound, lt is odorless, hard to dissolve in water, soluble in paraffin, fat, mineral oil, wax and common organic solvents. It can be used for whitening thermoplastic plastics, PVC, PS, PE, PP, ABS, Acetate fiber, paint, coating, printing ink, etc. It can be added at any stage in the process of whitening the polymers and make the finished products emitt a bright bluish white glaze.

It can also be used as special marks in identify fakless material if used in printing ink.
DIRECTION FOR USAGE:
Thoroughly dispersed in all those polymers.If any ultral violet spectrum absorption agent is used in the polymers, the optimal dosage of optical brightener OB should be adjusted.
DOSAGE: (per 100 kg polymer ):
    PVC white 0.01-0.05% (10-50 g) transparent 0.0001-0.001% (0.1-1 g) 
    PS white 0.001% (about 1g ) transparent 0.0001-0.001% (0.1-1 g) 
    ABS natural color 0.01-0.05% (10-50 g) white 0.01-0.05% (10-50 g) 
    PE, PP colorless 0.0005-0.001% (0.5-1 g) white 0.005-0.05% (5-50 g) 
    Other plastic are like above

CHEMICAL NAME: 2,5-bis(5-tertbutyl-2-benzoxazolyl)thiophene
MOLECULAR FORMULA: C26H26N2O2S (As International relative Atom Mass 1997)
MOLECULAR WEIGHT: 430.2
Max UV ABSORPTION WAVELENGTH: 375 nm (ethanoll)
Max OPTICAL EMITTING WAVELENGTH: 435 nm
EXCUTIVE STANDARD: Q/LQH009-2003

C.I.: 184

CAS NO.: 7128-64-5

Appearance: Light yellow or milk white powder

Purity: 99.0% min

Melting point: 196-203℃

Usage: A good whitening agent for PVC,PS,PE,PP,ABS,thermoplastic,acetate fiber,paint,coating and printing ink,etc.

Package: 25kg fiber drums with PE liner or according to customer requirements