Optical Brightening Agent OB CAS 7128-64-5

Short Description:

Optical brightening agents (OBAs), also known as fluorescent brightening agents (FBAs), are chemical compounds that give whitening effect to fabric. They do this by absorbing light in the ultraviolet and violet regionand re-emit the light in the blue region. This blue light reduces the yellow colour of the substrate and give a brightened look.

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Product Detail

Product Tags

Description

Optical Brightener OB is used as an brightener and to offset the yellowness of a polymer and yield a whiter appearance. Mainly used as thermoplastic (PVC, PS, PE, PP, ABS) optical brightener.

Specification:

Product Name	Optical Brightening OB
Chemical Name	2,5-Bis(5-tert-butyl-2-benzoxazolyl)thiophene
CAS No.	7128-64-5
Molecular Formula	C26H26N2O2S
Molecular Weight	430.56
Appearance	Slight greenish yellow powder
Assay	98% min
Melting point	196-200°C

Application

Optical Brightening OB is use for coatings, printing inks, paints, dyes, manufactured fibers, synthetic leather, waxes, fats, and oils. Recommend indoor use only.

If OB must be used in combination with a UV absorber, the absorption spectrum of the latter must leave an open window in the near UVA for the optical brightener ob.

Recommended concentrations:0.02-5% depend on the application and degree of desired whiteness.