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Fluorescence Whitener
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Fluorescence Whitener VBU

[Subordinate Classification:Fluorescence Whitener] [Release Time:2012-11-23] [Reading Times:] [Return]
Fluorescence Whitener VBU
C.I. NO. 87
CAS#: 12768-91-1

 
Quality Index:
Item
Index
1) Appearance
Straw yellow even granule.
2)Fluorescence intensity, (equivalent to standard products), cent
100
3)Whiteness (Difference with that of standard product: whiteness of sample product% or WCTE standard sample whiteness% or WCTE)≥
-3
4)Moisture, % ≤
5.0
5)Fineness (residuum through screen with 250um aperture) %
10
6)Water-insoluble %         
0.5

Performance and characteristics:   
  Fluorescence Whitener VBU belongs to stilbene derivative. Its water-solubility, sunshine resistance, and acid-alkali resistance is higher than that of VBL, and higher whiteness under the same dosage. Blue with purple light as dissolved in the water; be stable when stored and transported. It is especially suitable for manufacturing high-grade paper and cotton fabrics.
Application:
1. Application in paper making:
  Whitening in ingredients, surface sizing and coating, etc. Added directly or dissolved in the water with temperature 30-50℃.
Dosage: to dry paper pulp: whitening in ingredients 0.1—0.3%; whitening in coating 0.1—0.5%; surface sizing 0.1—2%.
2. Application in printing and dyeing
  Cotton yarn and cotton fabric after fluorescence Whitener treatment improve their appearance greatly, increase their whiteness and brightness. The bleaching cotton yarn and fabric must get rid of all chlorine. The water should have no metallic ion, such as copper and iron ions.
Temperature 40-90℃; PH: 8-9; dosage: 0.1-0.5%
Package, storage, and transport:
  
25kg plastic bag, 25kg Carton pail, or packaging according to clients’ demand. Keep from sunshine, dampness; two years valid period.