含塩素ポリマーのアルデヒド橋かけ

概要

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It has been found that rubbers are cross-linked by aldehydes; and especially, in case of acidic polymers, that they can be cross-linked sufficiently without catalysts. In this paper, the cross-linking effects of chlorine containing polymers such as polychloroprene, chlorosulfonated polyethyrene and polyvinyl chloride are examined. Adding an active filler, hydrated silica 20 or 40phr of volumes, to Neopren WHV and varying the amount of α-polyoxymethylene 0, 2, 4, 6, 8 or 10phr, the initial cross-linking rate is measured, and then the most rapid of it is compounded about 4phr. The strongest compound is obtained when 2phr of α-polyoxymethylene is compounded and press-heated at either 130 or 150°C. Polyvinyl chloride is not cross-linked by aldehyde because of the excessive de-hydrochlorination under heating. Hypalon is cross-linked sufficiently by using a small amount of acid, and Hycar 1203J is cross-linked without using acid.
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