α - 술폰 지방산 알릴에스테르 올리고머의 합성 및 안료 분산성

Synthesis of Sodium α-Sulfo Fatty Acid Allyl Ester Oligomer and Didpersion Stability of Pigments in Aqueous Solution )

Allylaliphatic carboxylate oligomers were prepared from polymerization giving allyl aliphatic carboxylates in the presence of potassium persulfate in methanol and the α-sulfonation of these allyl aliphatic carboxylates oligomers were carried by direct addition of dry sulfur trioxide. The dispersing performance of oligomer type anionic surfactants and SDS in the aqueous suspension of Fe₂O₃ and Tio₂ particles were evaluated by particle size distribution and ζ-potential measurement. As results, the particles of Fe₂O₃ and Tio₂ were flocculated by addition of small amount of oligomer type anionic surfactants and SDS, then the flocks redispersed by more addition oligomer type anionic surfactants and SDS. The dispersion and flocculation were observed in lower concentration range of oligomer type anionic surfactants than SDS.