Polyisobutylene (CAS 9003-27-4) Technical Guide: Applications, Specifications, and Industry Insights
Table of Contents
1. Product Specifications and Comparative Analysis
Chemical Name: Polyisobutylene (PIB)
CAS No.: 9003-27-4
Molecular Formula: C4H8
Molecular Weight: 56.106 g/mol (monomer unit)
Physical Properties:
- Appearance: Colorless to pale yellow viscous liquid/rubber-like solid
- Density: 0.92 g/mL at 25°C
- Melting Point: 54–56°C
- Boiling Point: >300°C
Grade Comparison Table
| Grade | Average Molecular Weight | Key Applications |
|---|---|---|
| Low MW | 600–1,400 | Lubricant additives, adhesives |
| Medium MW | 2,400–4,500 | Sealants, waterproofing materials |
| High MW | 600,000+ | Industrial rubber, electrical insulation |
2. Detailed Applications of Polyisobutylene
Core Industrial Uses:
- Adhesives & Sealants: Primary component in high-performance pressure-sensitive adhesives and glass sealants
- Construction Materials: Waterproofing agent for roofing and underground structures
- Petrochemicals: Viscosity modifier in lubricants and fuel additives
- Polymer Modification: Enhances flexibility and aging resistance in asphalt/rubber products
- Electrical Engineering: Insulation material for cables due to high dielectric strength
3. Practical Use Cases
Case 1: Automotive Lubricant Formulation
PIB (MW 1,300) improves oxidation stability in engine oils, extending service intervals by 30%.
Case 2: Architectural Sealant Production
High-MW PIB (450,000) enables durable, UV-resistant sealing joints in curtain wall systems.
5. Contact Information
For technical specifications or bulk purchasing:
Email: info@vivalr.com
Phone: (86) 15866781826
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