Process for preparing aqueous dispersion
AssigneeUnimatec Co., Ltd.
InventorsToshimasa Sagawa, Haruyoshi Tatsu, Masayosi Horiuti
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Abstract
An aqueous dispersion is prepared by subjecting (meth)acrylate containing a polyfluoroalkyl group and a polymerizable monomer containing no fluorine atom to an emulsification treatment in the presence of a surfactant and a polypropyleneglycol-based compound having a molecular weight of 250 to 5,000, followed by copolymerization reaction in the presence of a polymerization initiator. The resulting aqueous dispersion, even if prepared from (meth)acrylate copolymer containing mixed perfluoroalkyl groups including perfluoroalkyl groups having 12 or more carbon atoms as polyfluoroalkyl groups, has a distinguished emulsion stability and thus can be effectively used as a water and oil repellent, etc.
Claims10
A process for preparing an aqueous dispersion which comprises subjecting (meth)acrylate containing a polyfluoroalkyl group and a polymerizable monomer free of fluorine atoms to an emulsification treatment in the presence of water, a nonionic surfactant comprising a condensation product of polyethylene oxide (n=10-90) and octyl phenol or nonyl phenol and a cationic surfactant, and a polypropyleneglycol-based compound having a molecular weight of 250 to 5,000, followed by copolymerization reaction in the presence of a polymerization initiator.
Dependencies are inferred from the claim text.