Rubber mixture, useful for noise insulation, comprises a heavy metal and/or its alloy and/or oxide, or powdered salt, a rubber (blend) and other conventional ingredients

摘要

Rubber material vulcanizied mixture comprises (wt.%): (a) a rubber or rubber blend (10-50); (b) a heavy metal and/or a heavy metal alloy and/or oxide, and/or powdered salt (85-40); and (c) conventional ingredients (5-10). The rubber mixture is based on unblended chlorinated butyl or acrylate rubber, nitrile or styrene-butadiene rubber, blended with epoxidized natural rubber. An Independent claim is included for preparation of the rubber material comprising mastication of the rubber mixture in a rolling mill for take up of component (b), with mixing of these into the roll gap, homogenization of the whole mixture in the rolling mill, and vulcanization by heating, or by calendering and vulcanization.