Effect of the Addition of Water-Soluble Polymeric Species on the Encapsulation of Pigments by Soap-Free Emulsion Polymerization

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  • SAITO Natsukaze
    Department of Chemical Engineering, Faculty of Engineering, Niigata University
  • KIMRA 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に及ぼす水溶性高分子種の添加の影響
  • 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 ニ オヨボス ス

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Abstract

It was investigated how the addition of a mixture of two water-soluble polymeric species affe-cted the state of encapsulation of pigments by soap-free emulsion polymerization. The pigments examined were disazo-yellow (Index number, PY17), phthalocyanine blue (Index number, PB 15 : 3), and carbon black (# 15), which had been predispersed in the aqueous solution of a sur-factant before the polymerization. The monomer used for the encapsulation was methyl metha-crylate. The surfactants added were hydroxy-propyl methyl cellulose (HPMC) and poly (vinyl alcohol) (PVA). In this experiment, the sate of encapsulation was mainly examined by the addition of PVA and HPMC with different degree of polymerization. It was found that the pigments were encapsulated better by the addition of the mixture of PVA and HPMC rather than the individual surfactants.

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