Fluorescent Brightener Definition & Classification
What Is Fluorescent Brightener?
Optical brightener sometimes called optical brightening agents (OBAs), fluorescent brightening agents (FBAs) or fluorescent whitening agents (FWA) are colorless to weakly colored organic compounds.When present on a substrate, absorb primarily invisible ultraviolet light in the 300-400 nanometer (nm) range and re-emit in the visible violet-to-blue fluorescent light to yield a brighter, fresher appearance.They are designed to brighten colors or mask yellowing in plastics, lacquers, paints, inks, photo-processing solutions and fibers.
Fluorescent Brightener Synonyms
Here we listed the synonym names of optical brightener which we often see and all refers to optical brighteners in most cases
Fluorescent Brightener Classification
1）Fluorescent Brightener Classification by Application
- Fluorescent brightener for detergent
include optical brightener CBS-X,DMS/AMS, CBS-155
- Fluorescent brightener for paper
include Optical brightener PC, BBU/ BBU-L, VBL/VBL-L
- Fluorescent brightener for fiber and textile
- Fluorescent brightener for plastic
- Fluorescent brightener for paint and ink
include optical brightener UVT-1, ST, OEF, RT
2) Fluorescent Brightener Classification by Chemical Structure.
1. Toluylene type, with blue fluorescent light, used in cotton fiber, synthesis fiber, paper, soap industries.
2. Vanilla type, with coumarone structure and strong blue fluorescent light, use in celluloid, PVC plastics.
3. Pyrazoline type, with green fluorescent light, used in wool, polyamide, acrylic fibers.
4. Benzo nitrogen type, with red fluorescent light, used in acrylic fiber, PVC, PS.
5. Phthalimide type, with blue fluorescent light, used in terylene, acrylic fiber, cotton fiber.
3) Plastic Fluorescent Brightener Classification
1. Bisbenzoxazole, chemical structure as below, OB, OB-1, KSN, KCB all belong to this chemical structure
2. Phenyl coumarin, chemical structure as below
3. distyry-biphenyls, chemical structure as below, CBS-X is with this chemical structure