The Optical Brightener OB-1 masterbatch is an additive on plastics, mainly for whitening. The Optical Brightener used for plastics is powder, but the Optical Brightener masterbatch is granular, which is easier to stir.The Optical Brightener OB-1masterbatch is suitable for blown film, blow molding, blister molding, injection molding and other products. The Optical Brightener masterbatch is a kind of color masterbatch, usually called plastic colorant. The Optical Brightener OB-1 masterbatch we see is bright and white Good, high coloring strength, migration resistance and good heat resistance. With the rapid development of my country's recycled materials industry in recent years, the lack of raw material resources has caused the price of raw materials to rise. In order to reduce costs, many plastic manufacturers often use recycled materials. The color of the recycled old materials is dull and dull in secondary processing, and many manufacturers add whitening masterbatch.

Optical Brightener OB-1 is kind of plastics additives can absorb UV light then emit visible blue light to reduce the 

yellowish and make the products more white.It mainly used in whitening of polyester and plastic, as well in whitening of 

Nylon during polymerization,also used in ABS, PS, HIPS, PA,PC, PP, PET,EVA, PVC, etc.

China Optical Brightener OB-1 for master batches is very popular in the market,it is different from powder optical brightener ,it is granule with better dispersity and good for dustfree enviroment.

Product Name:Optical Brightener OB-1

Chemical Name:2.2’-(4.4’-diphenol vinyl) dibenzoxazol

CAS No.:1533-45-5

C.I. No.:393

Molecular Formula:C28H18N2O2

Molecular Weight:414 

Technical Index:Appearance:yellowish green powder 

Melting Point:357~359°C 

Purity:≥98.5% 

Recommend Dosage:200-500g per 1000kg material

Package:10KG/25kg per fiber drum with 450kg or 500 kg or 675kg/pallet

Optical Brightener OB-1 produced from China only,but world wilde use it to make master batches,then the optical brightener 

masterbatches and compound are used in the plastics industry.