Fluorescent Brightener OB-2
Fluorescent Brightener OB-2 is a bis(benzoxazolyl)stilbene derivative with two methyl substituents, supplied as a pale yellow powder at 98% purity.
The extended stilbene-benzoxazole conjugation absorbs ultraviolet radiation and emits intense blue fluorescence, and the methyl groups raise the melting point and reduce volatility, improving performance in high-temperature polymer processing. It is one of the most widely used brighteners for thermoplastics because it disperses well and resists migration.
The powder should be stored in a dry, closed container protected from sunlight and heat, since continued UV exposure causes photodegradation and yellowing of the brightener itself.
• Plastics brightening: the dominant use, giving a bluish-white appearance to PVC, polystyrene, polyolefins and ABS compounds.
• Fibre and textile applications: applied to polyester, polyamide and acrylic fibres by exhaust or padding processes.
• Masterbatch and film: incorporated into masterbatches and packaging films, where low volatility during extrusion is essential.
• Inks and coatings: used in solvent-borne and UV-cured systems to enhance whiteness and brightness.
Product Name: Fluorescent Brightener OB-2
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