Insoluble Sulfur IS-HS (Rubber Grade)
CAS Number: 7704-34-9
Insoluble Sulfur IS-HS is a high-stability polymeric form of sulfur used as the primary vulcanizing agent in tire manufacturing. Unlike soluble sulfur, it prevents bloom migration to the rubber surface before vulcanization, ensuring excellent ply adhesion and uniform crosslink distribution. It is the industry standard for steel-cord and textile-cord tire compounds.
Technical Specifications
| ash (%) | ≤0.30 |
| appearance | Light yellow powder or granules |
| moisture (%) | ≤0.50 |
| total sulfur (%) | ≥99 |
| insoluble sulfur content (%) | ≥90 |
| thermal stability (105°C, 15min reversion %) | ≤20 |
Applications
- Steel-cord tire belt and bead compounds
- Textile-cord carcass ply compounds
- High-performance passenger and truck tire treads
- Conveyor belt rubber compounds
- Industrial rubber goods requiring controlled vulcanization
Key Features
- Prevents sulfur bloom on uncured rubber surfaces
- Superior ply-to-ply adhesion in tire building
- High thermal stability IS-HS grade
- Uniform crosslink density for improved fatigue life
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CAS Number
7704-34-9
Category
Rubber / Tire ChemicalsAvailability
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