1.Properties:
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.
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2.Applications:
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.
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3.Specifications:
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Item |
Indices |
| Appearance |
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 |
| Moisture content |
≤5% |
| Content of insoluble impurities |
≤0.5% |
| Fineness (quantity of residue on sieve having 180um meshes) |
≤10% |
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4.Packaging and storing:
Packaged in cardboard barrels,20kg or 25kg each.Stored in cool and dry place.
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