CAS · 9003-27-4
Product Overview
Polyisobutylene is a high-purity adhesives-sealants supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.
Product Specifications
| Appearance: | Colorless to pale yellow transparent semisolid |
|---|---|
| Viscosity Average molecular weight: | 93,000–103,000 |
| Volatile (105℃, 2h): | 0.30% max |
| Melt Volume Index (MVI) @130°C, 10 kg cm³/10 min: | 90–150 |
Applications
1. Lubricant Additives
Acts as a viscosity modifier, dispersant, and pour point depressant.
Forms the backbone of many succinimide dispersants used in motor oils and hydraulic fluids.
Improves lubrication performance and reduces engine deposits.
2. Adhesives and Sealants
Used as a base polymer in pressure-sensitive adhesives (PSAs) and hot melt adhesives.
Provides permanent tack, elasticity, and moisture resistance, particularly in tapes, labels, and roofing membranes.
Excellent in butyl rubber-based sealants for construction and automotive use.
3. Butyl Rubber Production
Polyisobutylene丨CAS 9003-27-4 is one of the two monomers (along with isoprene) used to make butyl rubber (IIR).
Butyl rubber is prized for low gas permeability and weather resistance, ideal for:
Inner tubes
Pharmaceutical stoppers
Seals and gaskets
4. Packaging and Film Applications
Low molecular weight PIBs are used in cling films, chewing gum bases, and moisture barrier films.
Non-toxic variants are FDA-approved for food-contact applications.
5. Fuel and Oil Additives
Enhances fuel performance as a detergent/dispersant carrier fluid in gasoline and diesel formulations.
Helps in preventing carbon buildup in injectors and intake valves.
6. Electrical Insulation
Used in insulating tapes, cables, and dielectric materials for high-voltage applications.
Benefits
Excellent gas and moisture barrier
UV and chemical resistant
Oxidatively stable
Flexible and tacky at room temperature
Compatible with many hydrocarbon resins and oils
FDA-compliant grades available for food and pharma uses
Conclusion
A concise summary and suitability assessment for this product is available on request. Contact our team to discuss whether it fits your process and quality requirements.