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| Benetex OB |
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| 2,2’-(2,5-thiophenediyl) bis [5-tert-butylbenzoxazole] |
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| 7128-64-5 |
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Benetex 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.
Benetex 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.
Applications:
*Thermoplastics - Benetex OB can be used to impart excellent brightness to various thermoplastics, including: polyvinyl chloride, polyethylene, polypropylene, cellulose acetate, polystyrene, linear polyester, and polyamides
*Coatings - Benetex OB provides an excellent means to determine coverage of either conventional or UV cure coatings.
Small amounts act as a tracer which, when viewed under a black light, indicate whether or not uniform coating coverage has been achieved.
This is especially useful for clear coatings where coverage can be difficult to determine by conventional means.
Benetex OB can also be used to offset the yellowness of coatings to yield a whiter appearance.
*Printing Inks - Benetex OB may be used in printing inks to facilitate the quick identification of security bonds, and also as a safeguard against forgeries (bank notes).
Benetex OB may also be combined with dyes to produce particularly bright shades.
The effect is especially pronounced in pastel shades.
*Man-made fibers - Benetex OB imparts a lightfast brightness with good textile fastness properties to both PVC and acetate fibers. |
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Appearance: Yellow, crystalline powder
Molecular Weight: 431
Melting Range: 196-203'C
Flashpoint (Ignition): 662 'F (Marcusson)
Percent Volatile: < 0.5 %
Color of chloroform solution : clear (1g in 100ml at room temperature)
Transmittance: 450 nm >= 90%: 500 nm >= 93%
Specific Gravity(1g/100ml chloroform): 1.26 ~ (H20 = 1)
Vapor Pressure: @ 20'C. ca. 2x10(-10) (mm Hg)
Decomposition Temperature: > 350'C
Ash: 0.2% Maximum
Assay: 98% Minimum |
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