Struktol® Activator 73 A

STRUKTOL® Activator 73 A by Struktol is a multifunctional cure activator. It is a mixture of zinc salts of aliphatic and aromatic carboxylic acids. It is effective for the sulfur vulcanization of diene rubber, especially natural rubber. STRUKTOL® Activator 73 A can partly or totally replace conventional activators based on fatty acids, e.g., stearic acid, zinc stearate, and zinc 2-ethylhexanoate. It offers prolonged reversion time, higher modulus, less heat buildup under dynamic load and reduced compression set at elevated temperatures. It provides improved properties at high-temperature cures and viscosity reduction at high shear. It is used as an effective physical peptizer for the mastication of natural rubber. It improves processability in mixing, extrusion and molding. Recommended dosage level is 2-5 phr, in combination with 2-5 phr zinc oxide. The shelf life of this product is 2 years.