Product Main

Specifications

Optical Brightening Agent 4BK (C.I. 113)
 
Chemical name
Stilbene derivative
Structural formula
 
 
Specification
Appearance:
Grey powder
Fluorescent Color:
Slight bluish
Whitening strength:
100±3( compared with standard sample)
Moisture:
≤6%
Ionic character
anionic
 
 
Treating process:
1.exhausting whitening process:
       4BK: 0.05-0.8% (o.w.f.), 4BKth ratio: 1: 30, dyeing temperature: 40°C -100°C;       Na2SO4:0-10g/l.,start temperature :30°C , heating rate:1-2°C /min, keep the   temperature at 50-100℃ for 20-40min, then lower to 50-30°C --> wash-->  dry( 100°C ) --> setting (120°C -150°C )×1-2 min( add proper amount
       leveling agent according to the leveling effect).
2. Padding Process:
       4BK:0.5-5g/l, residue liquor ratio:100%, one dip and nip --> dry( 100°C )
       -->setting (120°C -150°C )×1-2 min
Use:
Mainly be used as brightener of contton, linen, silk, polyamide fiber ,wool and paper.
Package:
It is packed in 20Kgs paper board bucket..It can be packed according to the requirement of the user.
Note: It needs to be declared that the above data is 4BKsed on our present knowledge and experience; owing to too many affecting factors, these data cannot be free from their check and test when processing and using the product.