プロピレンオキシドゴムの白色配合について

概要

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The physical properties of propylene oxide rubber (POR) in white filler compounds were studied in relation to the appropriate level and type of filler. White fillers used were fumed silica, hydrated silica, clay, active calcium carbonate and calcium carbonate.<BR>From the results, it was found that both fumed and hydrated silica pigments developed the most excellent reinforcement with an increase in the tensile strength and the abrasion resistance. On the other hand, calcium carbonate pigments did not develop any reinforcement. Clay and active calcium carbonate pigments developed an intermediate reinforcement between silica and calcium carbonate.<BR>As the amounts of filler increased, the tensile strength reached a maximum and then decreased. This maximum tensile strength was developed at 30 phr of silica and at 40 to 60 phr of clay and calcium carbonate.
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