What Is Platinum-Cured Silicone Rubber?

Introduction

Platinum-cured silicone rubber, also known as addition-cure silicone, is a high-performance elastomer widely used in industries requiring superior thermal stability, biocompatibility, and chemical resistance. Unlike peroxide-cured silicones, platinum-cured variants utilize a platinum-based catalyst to initiate crosslinking, resulting in a cleaner, more precise curing process with minimal byproducts.

Key Properties

Thermal Stability – Withstands temperatures ranging from -50°C to 250°C (-58°F to 482°F), making it ideal for automotive, aerospace, and medical applications.

Biocompatibility – Non-toxic and hypoallergenic, meeting FDA and ISO 10993 standards for medical implants, baby products, and food-grade applications.

Chemical Resistance – Resistant to UV radiation, ozone, and harsh chemicals, ensuring durability in demanding environments.

Low Compression Set – Maintains elasticity over time, even under prolonged stress.

High Transparency & Flexibility – Used in optical devices, flexible seals, and soft-touch components.

Common Applications

Medical Devices (catheters, respiratory masks, surgical tools)

Electronics (keypads, gaskets, conductive components)

Automotive (engine gaskets, vibration dampeners)

Consumer Goods (baby bottle nipples, bakeware, wearable tech)

Advantages Over Peroxide-Cured Silicone

No harmful byproducts during curing.

Better control over curing time and shrinkage.

Enhanced mechanical properties and longevity.

Conclusion

Platinum-cured silicone rubber offers unmatched versatility, combining durability with safety for critical applications. Its adoption continues to grow in industries prioritizing precision and reliability.