Optical brighteners, or fluorescent whitening agents, are used to make plastics, fibers, coatings, inks, and detergents appear whiter and brighter. These products function by absorbing invisible ultraviolet light and re-emitting it as visible light in the blue range of the spectrum. The absorbance and emission spectra of the optical brightener Benetex OB are outlined on the product data sheets. These products are particularly useful to mask the yellowish cast sometimes observed in plastics and fibers after high temperature processing operations. They are also used in substrates containing pigments or dyes to make colors appear more brilliant.

SCS OB

Overview

SCS OB is a heat resistant, solvent soluble, chemically stable fluorescent whitener that provides brighter looking colors.  It is used to offset the yellowness of a polymer and to yield a whiter appearance.  Optical brighteners create brilliance by absorbing UV light, modifying the wavelength of the light and then emitting the light in a fluorescent fashion.   OB can also be used as a tracer in various applications and as an optical brightener in thermoplastics, coatings, printing inks, dyes, man-made fibers, waxes, fats, and oils.

Chemistry                       

Chemical Name:         2,2’-(2,5-thiophenediyl)bis(5-tert-butylbenzoxazole)

CAS Number:             7128-64-5

Chemical Structure:  

Benetex® OB

Typical  Properties                   

Product Form:             Solid

Melting Point:              192 – 208°C

Molecular Weight:       430.6 g/mol

 

SCS OB-1

Overview

SCS OB-1 is a heat resistant and chemically stable fluorescent whitener that increases  whiteness and provides brighter looking colors.  It is used to offset the yellowness of a polymer and to yield a whiter appearance.  Optical brighteners create brilliance by a fluorescence process involving absorption of invisible UV light and emission of visible blue light. OB-1 is especially useful in polyester and nylon fibers, as well as in high temperature engineering plastics.

Chemistry

Chemical Name:         2,2’-(1,2-ethenediyl)bis(4,1-phenylene)bisbenzoxazole

CAS Number:             1533-45-5

Chemical Structure:

Benetex® OB-1 HP

Typical Properties    

Product Form:                 Solid

Melting Point:              >359°C

Molecular Weight:       414.4 g/mol