Evaluation of Organic Peroxides as Curing Agents for Methylphenylvinyl-Siloxane Elastomers Used for Cellular Silicone Cushions

摘要

Two nonvinyl-specific curing agents, TS50 and BS, and three vinyl-specific curing agents, 101XL, 10XL, and 497XL, in two gums, SE54 and L97KVB, with two temporary fillers, urea and ammonium chloride are evaluated. In both gums, the vinyl-specific catalysts produce a lower compression set than the nonvinyl-specific curing agents. IN SE54 gum, 497XL and 10XL produce a softer cushion than the other catalysts. Also these two catalysts can be used in both gums with urea to produce L3223 cellular silicone. With vinyl-specific catalysts, urea and ammonium chloride produce the same load-deflection results, but urea gives a lower compression set than ammonium chloride. The two gums are quite different: L97KVB produces a much stiffer cushion with much less set than does SE54. (ERA citation 81:025941)