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The vulcanization of liquid siloxane rubbers is widely used in various branches of industry. Organic compounds of tin (tin octanoate, tin diethyldicapryliate and others) are applied as catalysts. The defect of the compositions, containing these compounds, is a small time of their stabilization at room temperature (5-15 min). Here, the phthalocyanines as catalysts of vulcanization were investigated for the first time. It is known, that when mixing the polysiloxanediols with structuring agents and the organic catalyst with tin at room temperature the complex 1 is formed:[1]

Metalloporphyrazines – Catalysts of Vulcanization of Liquid Siloxane Rubbers