Platinum catalysts are the key curing agents for addition-cure liquid silicone rubber (LSR), silicone gels, and silicone encapsulants. Their efficiency, stability, and poisoning resistance directly affect curing speed, transparency, and product lifespan.

IOTA Platinum Catalyst Product Series

IOTA 81 Series
General-purpose catalysts for methyl silicone rubber and silicone encapsulants.

IOTA 82 Series
Designed for phenyl silicone systems and LED encapsulation, offering excellent heat resistance and anti-yellowing performance.

IOTA 83 Series
Specially developed for polyether-modified and amino-modified silicone oil synthesis.

IOTA 8500
High-purity chloroplatinic acid for research and catalyst synthesis.

IOTA 84611 / 84612
Reaction inhibitors used to control hydrosilylation speed and extend pot life.

Key Models in the IOTA 81 Series

IOTA 8111
1500 ppm platinum, standard general-purpose grade.

IOTA 8113
3000 ppm platinum, balanced performance and cost.

IOTA 8112
5000 ppm platinum, high-activity catalyst.

IOTA 8116
20000 ppm platinum, ultra-high concentration for precision electronic encapsulation.

Delayed-Cure Series

IOTA 8117
Short-delay catalyst for fast-curing applications.

IOTA 8152 / 8153 / 8154
Long-delay catalysts designed for extended working time and longer pot life.

Specialty Grades

IOTA 8118A / 8118B
Poison-resistant catalysts for systems containing sulfur, phosphorus, amines, or other catalyst-deactivating impurities.

IOTA 8150 / 8151
Heat-resistant and anti-yellowing catalysts for high-temperature curing and optical-grade products.

IOTA 8119
Water-compatible catalyst with excellent solubility for water-based silicone systems.

How to Select the Right Platinum Catalyst

Based on Catalytic Efficiency

Standard silicone rubber applications typically use 1500–5000 ppm catalysts.

For electronics, optical silicones, and precision encapsulation, high-concentration catalysts such as 20000 ppm are recommended to reduce dosage and improve consistency.

Based on Pot Life Requirements

For rapid production cycles, standard or short-delay catalysts are suitable.

For applications requiring longer processing time, choose IOTA 8152–8154 long-delay grades.

Based on Special Operating Conditions

For high-temperature curing and yellowing resistance, select IOTA 8150 or IOTA 8151.

For formulations containing catalyst poisons such as sulfur, phosphorus, or amines, IOTA 8118A/B is recommended.

Industry Trends

Driven by the rapid growth of EVs, electronics, and LSR applications, demand for platinum catalysts continues to rise.

Industry reports indicate annual market growth of approximately 20–25%, while high-performance domestic platinum catalysts continue gaining market share.

Summary

Choose 8111, 8112, or 8113 for standard curing applications.

Choose 8116 when ultra-low addition levels are required.

Choose 8152–8154 for extended pot life.

Choose 8118A/B for poison resistance.

Choose 8150/8151 for high-temperature and anti-yellowing applications.

Choose 8119 for water-based silicone systems.

Selecting the right catalyst based on curing speed, pot life, and operating conditions is essential for achieving optimal performance in addition-cure silicone systems.