OPTICAL BRIGHTENER OB (Hubei Hongxin Chemical) by Hubei Hongxin Chemical is a 2,5-bis-(5-ter-butyl-benzoxazolyl-)thiophene. It acts as an optical brightener. It is widely used for the whitening of PVC, PE, PP, PS, ABS, SAN, SB, CA, PA, PMMA and acrylic resin. OPTICAL BRIGHTENER OB (Hubei Hongxin Chemical) is soluble in alkane, fat, mineral oil, paraffin and most organic solvents.
OPTICAL BRIGHTENER KCB by Hubei Hongxin Chemical is a 1,4-Bis(2-benzoxazoly)naphthalene. It acts as an optical brightener. OPTICAL BRIGHTENER KCB is used in whitening of synthetic fiber, plastic products specially EVA.
OPTICAL BRIGHTENER OB-1 by Hubei Hongxin Chemical is a 2,2-(4,4’-vinyl biphenyl) dual benzoxazole. It acts as an optical brightener. It is widely used in polyester fiber such as nylon and many kinds of plastics. It offers excellent thermal stability and whitening effect. It is compatible with PP, PVC, ABS, PA, PS, PC and PBT. Recommended dosage level of OPTICAL BRIGHTENER OB-1 in polyester fiber is 75-300 ppm and for rigid PVC ,PP, ABS, nylon, PC is 20-50 ppm. It is insoluble in water but soluble in high boiling point organic solvent such as phenyl chloride.
