What Is Highly Reactive Polyisobutylene (HR-PIB)?
Highly Reactive Polyisobutylene (HR-PIB) is a premium grade of polyisobutylene (PIB) with a high content of vinylidene terminal double bonds. Compared with conventional PIB, HR-PIB shows much higher chemical reactivity.
Structure and Properties
HR-PIB has the same saturated backbone as standard polyisobutylene polymer, but features highly reactive vinylidene end groups.
This structure provides:
- High reactivity
- Excellent thermal and oxidative stability
- Good chemical resistance and compatibility
Applications of HR-PIB
- Lubricant additives: Core raw material for PIBSA and ashless dispersants
- Engine oils and fuels: Improves cleanliness and deposit control
- Specialty chemicals: Used in functional polymers and intermediates