Foamable silicone rubber composition and method for curing the s

Details Foamable silicone rubber composition and method for curing the s Foamable silicone rubber composition and method for curing the s

1989-08-17

1990-12-25

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 25, 521 92, 521154, 521915, C08J 902

Patent

active

049803840

ABSTRACT:
A foamed cellular body of a cured silicone rubber composition can be obtained in a continuous process by irradiating a foamable silicone rubber composition containing, in addition to conventional diorganopolysiloxane, finely divided silica filler, blowing agent and crosslinking agent, a substantial amount of a dielectric inorganic powder, which is an iron oxide or a ferrite, with UHF microwaves. When the silicone rubber composition as molded is irradiated with UHF microwaves, the energy of the microwaves absorbed by the dielectric powder is efficiently converted into heat so that the molded body can be very evenly heated to effect foaming vulcanization of the composition giving a foamed and cured silicone rubber article having an excellently fine and uniform cellular structure.

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