Detailed Description:
Optical Brightener OB (2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene) is a premium-grade fluorescent whitening agent widely used in plastics, synthetic fibers, coatings, printing inks, and other polymer applications. It works by absorbing invisible ultraviolet light and re-emitting it as visible blue light, thereby masking yellowish tones and significantly improving product whiteness. OB is known for its excellent thermal stability, light fastness, and compatibility with a wide range of polymers including PVC, PE, PP, PS, ABS, and polyester.

It is particularly suitable for high-temperature processing and outdoor applications due to its resistance to weathering and heat. This makes it an ideal choice for manufacturers seeking to enhance the visual appeal and marketability of their products.

Technical Specifications:
• Chemical Name: 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene
• Appearance: Light yellow crystalline powder
• Melting Point: 196–203°C
• Maximum Absorption Wavelength: 375 nm
• Maximum Emission Wavelength: 435 nm
• Solubility: Insoluble in water, soluble in organic solvents
• Thermal Stability: Excellent up to 300°C
• Applications: Plastics, synthetic fibers, coatings, inks, masterbatches, rubber products