Platinum Catalyst for Silicone Rubber (LSR/HTV)
Featured inIndustrial Catalysts
Platinum (Pt) catalyst for addition-cure silicone rubber is used in the hydrosilylation crosslinking of liquid silicone rubber (LSR) and room-temperature vulcanizing (RTV-2) systems. It catalyzes the addition reaction between vinyl-functional siloxane polymer and Si-H functional crosslinker at very low loading levels (typically 5–50 ppm Pt). The platinum catalyst enables fast, solvent-free, and by-product-free cure at moderate temperatures, producing transparent, odorless silicone vulcanizates.
Technical Specifications
| appearance | Colorless to pale yellow liquid (in silicone carrier) |
| shelf life | 12 months at ≤25°C, protected from inhibitors |
| platinum content (%) | 0.5–5.0 (concentrate) |
| specific gravity (25°C) | 0.95–1.05 |
| viscosity (25°C, mPa·s) | 100–10000 (grade-dependent) |
Applications
- Liquid silicone rubber (LSR) injection molding
- RTV-2 addition-cure mold-making silicones
- Medical-grade silicone tubing and implants
- Automotive silicone seals and gaskets
- Electronic potting and encapsulation silicones
Key Features
- Enables fast, by-product-free hydrosilylation cure of LSR
- Effective at ultra-low Pt loadings (5–50 ppm)
- Produces transparent, odorless, food/medical-grade silicone
- Compatible with standard LSR A/B mixing and injection systems
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