Product Name: Fluorescent Whitening Agent VBU
C.I. No.: --
Physical Form: light yellow even-sized powder
Whitening intensity:equivalent to the 100 points of the standard agent
Hue:slightly different from the standard agent
WCIE(whiteness different between VBU and the standard agent):≥-3.0
Content of insoluble impurities:≤0.5%
Fineness (quantity of residue on sieve having 180um meshes):≤10%
Fluorescent Whitening Agent VBU,also called acid-resistant Whitening Agent VBU,is a derivative of the diphenylethylene bistriazine.It has an appearance of light yellow powder,a nature of anion and an acid-and alkali-resistance of PH 2-10.This shitening agent can be used in a bath together with anionic or non-ionic surfacant,anionic dyes and synthetic resin.
Having a rather strong acid-and chlorine-resistance,VBU is mainly used for whiteing while cotton or viscose products and suitable for one-bath whitening of cotton fabric in resin finishing liquor.It can be used for whitening knitted undershirts to prevent them from being yellowed by sweat stain.