Optical Brightener OB

Optical brightener OB is poorly soluble in water, and soluble in alkane,
mineral oil, and common organic solvents.
1. Applications:
Optical Brightener OB can be used for whitening thermoplastics, PVC, PS, PE,
PP, ABS, acetate fibre, paint, coating, printing ink, etc. It can be added for
whitening at any stage of process of polymers and can give the finished
products a bright bluish white glaze.
2. Directions For Use And Dosage:
The dosage should be 0.01-0.05% on weight of plastic. Mix Optical brightener ob
with plastic granulars thoroughly and carry out shaping proudction.
3.The adding methods of optical brighteners:
According to the different producing techniques of paints, there are two ways
of adding optical brighteners:
(1) Optical brighteners OB are usually added in powder form during the
grinding process (also the preparation process of paste) of paints production,
then grinded together with paint vehicle. After fully grinded to microparticle
with diameter ≤20μm, evenly disperse it into paints.
(2) After levigating optical brighteners OB, add it into paints by high-speed
dispersion machine. 
4. Optical brightener OB used for the whitening of white enamel
Prescription (mass fraction):
white enamel (polyurethane type or alcohol acid type): 99.9%
optical brightener OB: 0.02% ~ 0.05%

Click to Enlarge