Evaluation of organic peroxides as curing agents for methylphenylvinyl-siloxane elastomers used for cellular silicone cushions
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.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6522355
- Report Number(s):
- UCRL-53124; ON: DE81025121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360401* -- Polymers & Plastics-- Preparation & Fabrication-- (-1987)
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
COMPRESSIBILITY
CURING
ELASTOMERS
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
PEROXIDES
POLYMERIZATION
POLYMERS
SILICONES
SILOXANES
SYNTHESIS