Optical Brightening Agent OB

2,5-Di(5-tert-butylbenzoxazol-2-yl)thiophene（OB）

CASNo.7128-64-5

StructuralFormula:

Properties:

It belongs to the symmetrical structure of2,5-thiophene derivatives of benzoxazole. It is light-yellow crystal, non-toxicand odorless, insoluble in water, has light and heat resistance, does not reactwith foaming agents, crosslinking agents, etc., and has no exudation orextraction properties. The spectral absorption wavelength is 370nm.

It is mainly used for whiteningthermoplastic, polyvinyl chloride, polystyrene, polyethylene, polypropylene,ABS, acetate fiber, paint, coating, printing paint, etc. It is used for polymerwhitening in various processing stages, and can give processed products abright blue white luster. Due to its superior fluorescent whitening effect,non-toxicity, good thermal stability, and low dosage, it has been widely usedas one of the fluorescent whitening agents in China.

Specification(HG/T 3703-2016):

Remarks: This quality indicator is only for reference, and the specific indicators are subject to the contract.

Usage:

Mix it with various plastic ions,equivalent to 0.01-0.05% of the weight of plastic raw materials (recommendeddosage), thoroughly and evenly for molding and processing.

Packageand Storage:

Paper box packaging, lined with plasticbags, customers' requirement. Storage in shady room and dry place.

SafetyProtection:

It has a certain irritant effect on theskin and eyes, which may cause respiratory irritation. Preventive measures:Operators should wear protective goggles/masks, protective gloves, and avoidinhaling dust during work. After operation, thoroughly clean the skin. Thisproduct should be used outdoors or in well-ventilated areas as much aspossible. Necessary first aid measures: If inhaled, please move the patient tofresh air. Skin contact: rinse with soap and plenty of water. Eye contact: thoroughlyrinse with plenty of water for at least 15 minutes and consult a doctor.Ingestion: rinse mouth with water and consult a doctor.