Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1990-09-17
1991-08-20
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521 92, 521 95, 521154, 521 96, 521915, C08J 910
Patent
active
050414666
ABSTRACT:
An efficient method for the preparation of a foamed and cured silicone rubber body having a uniform fine-cellular structure, in which a foamable silicone rubber composition is prepared by uniformly compounding a diorganopolysiloxane, finely divided silica filler, titanium dioxide powder, blowing agent and curing agent, each in a specified weight proportion, and irradiating the thus prepared composition with microwaves having a frequency of 900 to 5000 MHz which, by virtue of the titanium dioxide powder having a high dielectric constant, are efficiently absorbed and converted to heat, whereby the composition is evenly heated throughout the body to cause uniform foaming and curing.
REFERENCES:
patent: 4391765 (1983-07-01), Lee et al.
patent: 4460713 (1984-07-01), Lee et al.
patent: 4555529 (1985-11-01), Lee et al.
patent: 4572917 (1986-02-01), Graiver et al.
Hatakeyama Jun
Takahashi Masaharu
Foelak Morton
Shin-Etsu Chemical Co. , Ltd.
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