Optical brightener OB can be used for the whitening and brightening of thermoplastics, such as PVC, PE, PP, ABS, PS and other plastic products. Optical brightener OB has excellent heat resistance and light resistance. It can also be used to whiten some fibers, paints, coatings, high-grade photographic papers, inks, or make anti-counterfeiting marks, etc. It has the best light transmittance, dispersibility, and weather resistance, and has a significant effect on brightening transparent plastics.

Most people knew BASF and Eastman produced optical brighteners,but now China is the only production original.Optical brightener is not only has high technical content, but also has serious environmental pollution. The configuration of environmental protection equipment consumes a lot of money.Now optical brighteners are popular and expprt to more than 40 countries,such as Germany/Italy/Poland/Russia/Ukraine/Turkey/UAE/Iran/Israel/Korea/Vietnam/Thailand/Indonesia/Mexico/Peru/Egypt/Argentina/Brazil/Algeria etc

Products brief:

Product Cate：Optical Brightening Agent For Plastic

Product Name：Optical Brightening Agent OB

Chemical Name：2,5'-Bis[2-(5-tert-buty l-2 benzoxazoly)thiophene

CAS No.：7128-64-5

C.I. No.：184

Molecular Formula：C26H26N2O2N2

Molecular Weight：430

Appearance:slight greenish yellow powder 

Melting Point:200-202°C 

Purity:≥99%

Uses：Mainly be used in whitening of thermoplastic, polyvinyl chloride(PVC), polypropylene(PP), polyester fiber, paint and ink, coating ,as well as trasparent plastics products etc.

Dosage:

In plastics, the amount of fluorescent whitening agent is usually expressed as a percentage relative to the mass of the plastic. 

The usual amount of transparent plastic is 0.0001%-0.001%, and the amount of white plastic is usually 0.05%-0.1%.

In paint and ink, the amount of fluorescent whitening agent is usually 0.02%-0.05%. When it comes to the specific dosage, 

it is recommended to get some small samples from the fluorescent whitening agent manufacturer, because less fluorescent whitening 

agent will easily cause whitening The effect is unsatisfactory. Using too much will cause the brightener to separate out, so before determining 

the dosage, take a sample test to achieve our desired effect.