The chemical composition of fluorescent brighteners mainly includes the following categories:
Styrene type: This type of fluorescent brightener is used in cotton fiber and some synthetic fiber, papermaking, soap making and other industries, with blue fluorescence.
Coumarin type: It has the basic structure of coumarone and is used in celluloid, polyvinyl chloride plastics, etc. It has strong blue fluorescence.
Pyrazoline type: It is used in wool, polyamide, acrylic and other fibers, with green fluorescence.
Benzotriene type: It is used in acrylic and other fibers and polyvinyl chloride, polystyrene and other plastics, with red fluorescence.
Phthalic imide type: It is used in polyester, acrylic, nylon and other fibers, with blue fluorescence.
Application fields of fluorescent brighteners
Fluorescent brighteners are widely used in textiles, paper, detergents, plastics and other fields. For example, fluorescent brightener OB-1 is used in polyester fibers, with excellent whitening effect and excellent thermal stability. In addition, fluorescent brightener KCB is widely used in polyolefins, PVC, foamed PVC, TPR, EVA and PU foam, and has excellent light resistance and heat resistance.