Optical Brightener OB-1

OB-1 is a stilbene benzoxazole class optical brightener suitable for many kinds of plastic materials under high temperature process.

CAS No: 1533-45-5
Appearance: bright yellow crystals powder
Assay: 98.5%Min Melting point: 355-360ºC
Properties: OB-1 imparts very good heat resistance because of high melting point and strong stability. Because this product`s hydrophobic nature, it has good light fastness. it also has good light-resistance and resistance to bleaching of chloride, can impart excellent effect used in polyester fiber . its strong fluorescence makes it not only can improve substrates whiteness but also brightness, it can be used as disperse dyes in the chemical fiber, can be used like oil dissolving coloring agent in the plastics.
Applications:
OB-1 is Suitable for whitening chemical fibers, such as the polyester fiber, nylon fiber, polypropylene fiber and so on; suitable for whitening and brightening PP, hard PVC, ABS, EVA, polystyrene, polycarbonate, etc, suitable to be added into the conventional polymerization of polyester and nylon fiber, especially suitable for whitening the plastics of high temperature compaction.