シランカップリング剤による塩素化ブチルゴムの架橋

概要

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The followings became obvious through the study of cross-linking reaction of chlorinated butyl-rubber (Cl-IIR) and silanecoupling agents (SCA).SCA are compounded with Cl-IIR by needer, pressed and immersed into hot water (70°C) to cross-link the compounds. The effect of the amount of SCA, catalyst and press temp. on the degree of cross-linking was studied by calculating Flory-Rehner equ. of swollen samples.It was found that the amount of SCA and catalyst increases the degree of cross-linking. The press temp. also increases the degree of cross-linking but when it goes as high as 180°C, cross-linking occurs without water-immersion. The amount of SCA must be higher than that of Cl in Cl-IIR and press temp. must be as high as 150°C to get good degree of cross-linking. The degree of cross-linking become constant after about 24hr immersion in hot water.
日本ゴム協会の論文