Optical brightener OB(fluorescent whitening agent OB) is a kind of optical brightener called the public lover, OB shows that it has a very good fusion and is suitable for all kinds of plastics. At the same time, the optical brightener OB can also be used in paint, ink, coating, and PE film.
Nickname: 2,5-Bis-/5-tert.-butyl-2-benzoxazolyl)-thiophene; Fluorescent Brightener OB; FLUOESCENT BRIGHTENER-OB; FBA 184; 2,5-Thiophenediylbis(5-tert-butyl-1,3-benzoxazole); Optical Brightener OB; 2,2'-thiene-2,5-diylbis(5-tert-butyl-1,3-benzoxazole)
Product Name：Optical Brightener OB
Chemical Name：2,5'-Bis[2-(5-tert-buty l-2 benzoxazoly)thiophene
Appearance:slight greenish yellow powder
Uses：Mainly be used in whitening of thermoplastic, polyvinyl chloride(PVC), polypropylene(PP), polyester fiber, paint and ink, etc.
In plastics, the amount of fluorescent whitening agent is usually expressed as a percentage relative to the mass of the plastic.
The usual amount of transparent plastic is 0.0001%-0.001%, and the amount of white plastic is usually 0.05%-0.1%.
In paint and ink, the amount of fluorescent whitening agent is usually 0.02%-0.05%. When it comes to the specific dosage,
it is recommended to get some small samples from the fluorescent whitening agent manufacturer, because less fluorescent whitening agent will easily cause whitening The effect is unsatisfactory. Using too much will cause the brightener to separate out, so before determining the dosage, take a sample test to achieve our desired effect.