Encapsulation of Pigments by Soap-Free Emulsion Polymerization of MMA

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  • SAITO Natsukaze
    Department of Chemical Engineering, Faculty of Engineering, Niigata University
  • KIMURA Isao
    Department of Chemical Engineering, Faculty of Engineering, Niigata University
  • TANAKA Masato
    Department of Chemical Engineering, Faculty of Engineering, Niigata University

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  • ソープフリー重合による顔料のカプセル化
  • ソープフリー ジュウゴウ ニ ヨル ガンリョウ ノ カプセルカ

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Abstract

It was investigated whether a few pigments were encapsulated by soap-free emulsion polymerization of methyl methacrylate or not.<BR>Pigments examined here were carmine 6 B (Index number 15850), disazo-yellow (Index number 21100), copper phthalocyanine blue (Index number 74160).<BR>A few surfactans were added together with the pigments.<BR>The surfactants added were poly (vinyl alcohol) (PVA) sodium dodecyl-benzenesulfonate, sodium dodecyl sulfate.<BR>The size distributions of pigments before and after encapsulation and the effect of the pigments on the state of encapsulation were mainly investigated.<BR>The state of encapsulation was estimated by SEM and EPMA. Disazo-yellow and copper phthalocyanine blue were encapsulated extremely well by using PVA as a surfactant.<BR>Carmine 6 B could not be encapsulated even by using all the surfactants.

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