Magnesium Oxide (Rubber Grade)
CAS Number: 1309-48-4
Rubber-grade Magnesium Oxide (MgO) is an essential activator and acid acceptor for the vulcanization of polychloroprene (CR) rubber, chlorosulfonated polyethylene (CSM), and fluoroelastomers (FKM). It neutralizes hydrochloric acid generated during processing and aging, preventing compound degradation and metal corrosion. Rubber-grade MgO is produced to have controlled activity, surface area, and particle size for consistent cure behavior.
Technical Specifications
| ash (%) | ≥95 (as MgO) |
| appearance | White powder |
| moisture (%) | ≤1.0 |
| MgO content (%) | ≥96.0 |
| specific surface area (m²/g) | 80–160 |
| activity (acetic acid value, mL/g) | 150–250 |
Applications
- Polychloroprene (CR/neoprene) vulcanization
- CSM and CM rubber compounds
- Fluoroelastomer (FKM/Viton) curing
- Chlorinated PE compounds
- Acid-absorbing filler in halogen-containing rubber
Key Features
- Essential acid acceptor for CR and CSM vulcanization
- Controlled activity grade for consistent cure rates
- Prevents HCl-induced compound degradation and metal corrosion
- Compatible with thiourea and thiazole accelerators in CR systems
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CAS Number
1309-48-4
Category
Rubber / Tire ChemicalsAvailability
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