Optical Brightening Agent 4BK, OBA
1)With strong fluorescence
2) With high light stability and chemical stability

Optical Brightening Agent 4BK

 Optical whitening agent

Main Chemical Composition:Stilbene bistriazine derivative

Specification:Appearance: Slight yellow uniform powder                        

Fluorescent Color: Slight bluish

Water: < 5%

                       Fineness( 120 mesh residue):≤5%

Property:

1)With strong fluorescence, excellent whitening performance and slight bluish shade

2) With high light stability and chemical stability.

3) Good acid stability, stable in perborate and hydrogen peroxide.

Application:Mainly be used in whitening of cotton fabric and polyester /cotton blends. T/C whitening in one bath.

Treating Process:

 Exhaust process:     0.1-0.8% (o.w.f.),              bath ratio: 1:10-30

Temperature     90--100°C×30-40min→wash→dry.

The processing can be adjusted according to the actual situation.

One bath process of Scouring hydrogen peroxide bleaching and whitening:

Dosage: 0.2—0.8%( o.w.f.)               hydrogen peroxide:5-15/L

Stabilizer:1—5g/L                             NaOH: 2—4g/L

Scouring agent: 0.5—1g/L                bath ratio: 1:10-30

Temperature     90--100°C×30-40min→wash→dry.

The processing can be adjusted according to the actual situation.

Packing:25kg per cardboard drum