Silicone rubber molded products and a method for producing same
AssigneeToray Silicone Company, Ltd.
InventorHideki Kobayashi
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Abstract
Cured unitary molded articles containing conductive and insulating silicone rubber components are prepared by tightly contacting a curable insulating silicone rubber composition comprising a curable silicone rubber containing substantially no carbon black and a nonacyl-type peroxide with a cured conductive silicone rubber component containing carbon black and which has been cured by an addition reaction in the presence of a platinum-type catalyst and molding the resultant composition at elevated temperatures to cure the insulating silicone rubber component and form a unitary cured silicone rubber article. This invention also relates to cured silicone rubber articles prepared using the method of this invention.
Claims18
A molded article consisting essentially of (A) a cured conductive silicone rubber containing from 5 to 75 weight percent carbon black, said component being cured by an addition reaction in the presence of a platinum type catalyst, and (B) a cured insulating silicone rubber component containing substantially no carbon black and which is cured by from 0.2 to 5.0 weight percent of a non-aryl peroxide, wherein said conductive and insulating components form a unitary article.
A method for preparing a unitary molded silicone rubber article comprising
- (I) tightly contacting
- (A) a cured conductive silicone rubber component containing from 5 to 75 weight percent carbon black, said component having been cured by an addition reaction in the presence of a platinum-type catalyst, and
- (B) an uncured insulating silicone rubber component containing substantially no carbon black and from 0.2 to 5.0 weight percent of a nonacyl-type organoperoxide, and
- (II) curing the insulating silicone rubber component at an elevated temperature to form a unitary silicone rubber article.
Dependencies are inferred from the claim text.