Fixing between fr vulcanizates and metal plates and its prevention.

MORI Kunio, TAKAMATSU Sigeaki, WATANABE Akira

doi:10.2324/gomu.62.52

Bibliographic Information

Other Title

金属と加硫ゴムの固着に関する研究　ＶＩＩ　　フッ素ゴム加硫物と金属の固着とその防止法
フッソゴムカリュウブツトキンゾクノコチャクトソノボウシホウ

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Description

When fluorinated rubber (FR) vulcanizates came into contact with metal plates under a pressure, very high fixing strength arose between both. The fixing strength at an initial period is the result that hydrogen bonds arose in the interface between fluorine atoms on the vulcanizates and the metal surfaces. In subsequent fixing, a chemical reaction occurs in the interface to give a first order bond between both. As a result, the fixing strength increased with increasing the contact time. The interfacial reaction occurs mainly between active double bonds and/or active functional groups on the vulcanizates and a OH group on the metal surface: The active double bonds are produced on a backbone of polymers during vulcanization for FR with vinylidene fluoride unit. the active functional groups result from curing agents during vulcanization. In order to prevent the fixing between FR vulcanizates and metals, the surface of FR vulcanizates was modified by using the blooming method and a surface treatment technique. The immersing treatment of FR vulcanizates into the acetone solution of a reactive silicon and hydrogen hexachloroplatinate was especially very effective for preventing the fixing. This is for that the reactive silicon react with the active double bond and the active side chains on FR vulcanizates and the formed siloxane film has low surface tension for its polar components and prevents perfectly the above interfacial reactions.

Journal

NIPPON GOMU KYOKAISHI

NIPPON GOMU KYOKAISHI 62 (1), 52-60, 1989

THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN