Optical Brightener Agent 4BK
Main component: Stilibene derivative
C.I. number: 113
Technical Index:
| Appearance: |
slight yellowish powder |
| Shade of color: |
slight blue |
| Moisture: |
≤5.0 |
Properties and Features:
1. Has high whitening effectiveness with slight shade of blue
2. Stable to light, chemical stability is good
3. With good stability to weak acid, alkali, perborate and hydrogen peroxide.
Application Field:
Suitable for whitening of cotton, polyester/cotton blends peroxide bleaching and whitening in one bath, also suitable for pad process.
Application Process:
1.Exhaus:
| dosage: |
0.1-0.8%(o.w.f) |
| L/R: |
1:10-30 |
| Sodium sulfate or salt: |
10-20g/l |
| Temperature´time: |
90-100°C ´30-40min, wash, dry. |
2.Scouring peroxide bleaching and whitening in one bath:
| Dosage: |
0.2-0.8%(o.w.f) |
| Hydrogen peroxide: |
5-15g/l |
| Stabilizer: |
1-5g/l |
| NaOH: |
2-4g/l |
| Scouring agent: |
0.5-1g/l |
| L/R: |
1:10-30 |
| Temperature´time: |
50-100°C´30-40min, wash dry. |
Actual process should be adjusted according to different requirement.
Packing and Storage:
25kgs cardboard drum lined with PE, can be stored 6 months under cool, dry condition without light.
It needs to be declared that the above data is based 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.
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