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Fluorescence Whitener
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Fluorescence Whitener VBL

[Subordinate Classification:Fluorescence Whitener] [Release Time:2012-11-23] [Reading Times:] [Return]
Fluorescence Whitener VBL
C.I. NO. 85
CAS#: 131-57-7
Molecular formula
C36H34O8N12S2Na2
 
Quality index:
Item
Index
Used in textile.
Used in paper making.
1)Appearance
straw yellow to yellow even powder.
2)Fluorescence intensity, (equivalent to standard products), cent
100
3)Relative intensity (standard product), cent
100
——
4)Color light, (standard product)
Approximate-micro
——
5)Whiteness, (standard product) ≥
——
-3
6)Moisture, % ≤
5.0
7) Water-insoluble % ≤
0.5
8)Fineness (residuum through screen with 250um aperture) %
10.0
9)Limitation of 23 kinds of harmful aromatic amine, mg/kg
Accord with GB19601-2004 standard.

Performance and characteristics:   
 Fluorescence Whitener VBL is stilbene triazine derivative. Its fluorescence tone, cyan with light purple, belongs to anion. It is mainly used in whitening and brightening of cotton fabrics, whitening of paper, detergent and paint, etc.
Application process:
1. Whitening and brightening of cotton fabrics

  Application process includes dip-dye, pad dyeing, sizing, and soap whitening, and white discharge printing, etc. The dosage: dip-dye: 0.1~0.4%; pad dyeing: 0.5-3k/l; normal dosage of auxiliary; bath ratio: 1:20-40, temperature 40℃ or so, PH=7-9; 30 minutes; drying temperature 70-80℃.
2. Whitening in paper-making industry
 Application process includes whitening of inner pulp, coating, and surface sizing. The dosage is 0.1-0.5%, bath ratio 1:20-40, PH=8-9, temperature 20-45℃, 30 minutes.
3. Package and notes:
  1. Carton/metal pail lined with plastic bag; net weight: 25kg; or packaging according to clients’ demand.
  2. Store in the shade, keep from sunshine and dampness. Two years valid period.
  3. Whitener VBL can be mixed with anion and non-ion surface active agent, direct and acid anion dye and paint, etc. It is not suitable for mixing with cation dye, surface active agent, or synthetic resin.
  4. The used water is soft water without metallic ion (such as copper and iron ion) or free chlorine.
  5. Suitable quantity is demanded. Over dosage may reduce the whiteness, even become yellow. The general dosage is not more than 0.5%.