Optical Brightener OB CAS 7128-64-5: Comprehensive User Guide
Table of Contents
1. Product Overview & Specifications
Optical Brightener OB (CAS 7128-64-5) is a high-performance benzoxazole derivative widely used to enhance whiteness and brightness in polymer applications.
| Parameter | Specification |
|---|---|
| Chemical Name | 2,2′-(2,5-Thiophenediyl)bis(5-tert-butylbenzoxazole) |
| Appearance | Yellow-green crystalline powder |
| Molecular Weight | 424.48 g/mol |
| Melting Point | 196-202°C |
| Recommended Dosage | 0.01-0.05% in polymers |
2. Key Applications & Use Cases
Primary Industrial Uses:
- Plastics: PVC, PE, PP modification
- Textiles: Synthetic fiber brightening
- Coatings: UV-resistant formulations
Operational Guidelines:
| Material | Dosage Range | Processing Temp |
|---|---|---|
| PVC Products | 0.02-0.03% | 160-180°C |
| Polyester Fibers | 0.05-0.1% | 270-290°C |
3. Performance Comparison
| Brightener | Heat Stability | UV Resistance | Cost Efficiency |
|---|---|---|---|
| OB 7128-64-5 | ★★★★☆ | ★★★★★ | ★★★★☆ |
| CBS (Tinopal) | ★★★☆☆ | ★★★☆☆ | ★★★☆☆ |
| OB-1 | ★★★★★ | ★★★★☆ | ★★☆☆☆ |
4. Industry Case Studies
Case 1: PVC Pipe Manufacturer
Client: Jiangsu NewMaterials Co., Ltd.
Challenge: Achieve superior whiteness in gray PVC pipes
Solution: 0.025% OB 7128-64-5 additive
Result: 15% whiteness improvement with 8% cost reduction vs traditional formulas
Case 2: Automotive Textiles
Client: Zhejiang TexTech Auto Interiors
Challenge: Prevent yellowing under UV exposure
Solution: 0.08% OB integration in polyester fibers
Result: 400+ hours UV resistance with maintained brightness
5. Usage Optimization Strategies
- Pre-disperse in carrier resins for homogeneous distribution
- Combine with antioxidants for thermal stability
- Adjust concentrations based on substrate opacity
6. Technical Support & Inquiry
Contact our material science team for application-specific guidance:
Email: info@vivalr.com
Phone: (86) 15866781826
Request Formulation Analysis: Send your material specs for customized brightener solutions.
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