Optical Brightener OB
Synonyms 2, 5-Bis(5'-tert-butyl-2-benzoxazol-2-yl)thiophene; 2, 5-Di(5-tert-butylbenzoxazol-2-yl)thiophene; BBOT
Molecular Formula: C26H26N2O2S
Molecular Weight: 430.56
CAS Registry Number: 7128-64-5
EINECS: 230-426-4

Appearance, light yellow or milk white powder
Volatility 0.5%max.
Turbidity 5.0 %max.
Solubility clear
Assay (by HPLC) 98.5%min.
Melting Point 200-202ºC
Ash Content 0.5%max.
Granularity (mesh) 200meshes min.

Solubility: Hardly soluble in water, but soluble in paraffin, mineral oils and ordinary organic solvents.
Packaging: Packaged in cardboard drums, 20kg or 25kg each

Properties:
1. Small consumption, strong whitening intensity, small consumption can bring a very good whitening result.
2. Wide service behavior, suitable for various kinds of plastic whitening.
3. Have a good compatibility with plastic, good resistance to high temperature and excellent light fastness and weathering resistance.

Fluorescent brightener OB uses:
1. Especially suitable for whitening plastics, such as the polyolefin, polyamide, polyacrylonitrile and so on.
2. Widely used in the film, injection molding and extrusion molding material, is suitable for all plastic processing.

Method of Application: Recommend consumption: Put about 20g OB brightener into every 100kg materiel, concrete consumption is adjusted according to compounding formula.