Optical Brightening Agent OB-1
OB-1 is used widely in the plastic market. Because of its excellent brightening ability, good thermal stability, and compatibility with many polymers.
Key words: optical brightening agent OB-1, optical brightener OB-1, fluorescent brightener OB-1, optical whitening agent OB-1, brightener OB-1

Typical Properties:

Chemical name: 2, 2-(1, 2-Ethenediyldi-4, 1-phenylene) bisbenzoxazole
Molecular weight: 414.4
CAS No.: 1533-45-5
C.I.: 393

Specifications:

Ash % 0.3max
Empirical Formula C28H18N2O2
Melting Point(DTA), C 353-359
Appearance Yellowish Green Powder
Odor Free of odor
Volatile Content % 0.3max
Assay % 99min
Particle Size 200 meshes

Application:

For whitening of polyester and nylon; also used in ABS, PS, HIPS, PA, PC, PP, EVA, PVC, etc.

Rate of use: (per 1000kg of substrate)
Polyester: 75-300g
EVA, PP, nylon: 75-200g