Daikin Industries, Ltd.

Nissin Chemical Industry Co., Ltd.

Ryosuke Hara

Masahiro Miyahara

Masaki Fukumori

Ikuo Yamamoto

Tsukasa Aga

Shinichi Minami

Rumi Kawabe

Fumihiko Yamaguchi

Masayuki Yamana

Kayo Kusumi

Mitsuhiro Usugaya

Yasuhiro Mitta

Akifumi Mitake

Takahito Kanbara

Provided is a surface treatment agent which does not use fluorine-containing monomers, particularly fluoroalkyl group-containing monomers. The surface treatment agent is a water-based emulsion which includes: a copolymer (1) which includes a first polymer formed from first monomers, and a second polymer formed from second monomers, wherein the second polymer is polymerized in the presence of the first polymer, the first monomers include a long-chain acrylate ester monomer (a) represented by the formula CH&#x2550;CA&#x2014;C(&#x2550;O)&#x2014;O-A(in the formula, Arepresents hydrogen, a monovalent organic group, or a halogen, and Arepresents a Cstraight-chain or branched hydrocarbon group), the first monomers do not include a halogenated olefin monomer (b), and the second monomers include the halogenated olefin monomer (b); a surfactant (2) including a nonionic surfactant; and a liquid medium (3) including water.

Surface treatment agent

Provided is a surface treatment agent which does not use fluorine-containing monomers, particularly fluoroalkyl group-containing monomers. Additionally, provided is a copolymer which includes a first polymer formed from first monomers, and a second polymer formed from second monomers. The copolymer does not include fluorine. The second polymer is polymerized in the presence of the first polymer. The first monomers include a long-chain acrylate ester monomer (a) represented by the formula CH=CA-C(&#x2550;O)&#x2014;O-A(in the formula, Arepresents hydrogen, a monovalent organic group, or a halogen, and Arepresents a Cstraight-chain or branched hydrocarbon group). The first monomers and the second monomers both include a halogenated olefin monomer (b).

Copolymer, and surface treatment agent

Excellent water- and oil-repellency and soil releasability can be obtained by a method of preparing a treated textile, having steps of:

Water- and oil-repellent treatment of textile

An aqueous water- and oil-repellent dispersion containing: (A) a homopolymer or copolymer containing at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate or methacrylate group, or a copolymer containing said polymerizable compound and another compound copolymerizable therewith, (B) a surfactant comprising a cationic surfactant and a nonionic surfactant comprising an alkylene oxide adduct of a higher aliphatic secondary alcohol, and (C) a high flash-point organic solvent, has durable water- and oil-repellency and excellent storage stability.

Aqueous water-and oil-repellent dispersion

An aqueous water- and oil-repellent dispersion containing: (A) a homopolymer or copolymer containing at least one polymerizable compound having a perfluoroalkyl or perfluoroalkenyl group and an acrylate or methacrylate group, or a copolymer containing said polymerizable compound and another compound copolymerizable therewith, (B) an organic solvent which is tripropylene glycol, and (C) a surfactant, has durable water- and oil-repellency and excellent storage stability.

A water-repellent composition for foaming process of a hydrophobic textile, comprising (A) a dispersion of a fluorine-containing polymer, (B) a foaming agent, and (C) a wetting agent is suitable for water-repellent treatment of the hydrophobic textile and can give easy generation of sufficient foaming.

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Osaka, Japan

Ryosuke Hara