Water-and oil-repellent
AssigneeUnimatec Co., Ltd.
InventorsJi-Shan Jin, Sumiko Mouri, Katsuyuki Sato
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Abstract
A water- and oil-repellent comprising an aqueous dispersion of a fluorine-containing copolymer including as a copolymerization unit (a) a perfluoroalkylalkyl (meth)acrylate represented by the general formula CnF2n+1CmH2mOCOCR═CH2 (wherein R represents hydrogen atom or methyl group; n represents 4, 5, or 6; and m represents 1, 2, 3, or 4), (b) benzyl (meth)acrylate, (c) a fluorine-free polymerizable monomer other than benzyl (meth)acrylate, and (d) a cross-linkable group-containing polymerizable monomer; and a blocked isocyanate added to the aqueous dispersion in a weight ratio of 0.05 to 3.0 to the weight of the solid content of the aqueous dispersion.
Claims2
A water- and oil-repellent consisting of (A) an aqueous dispersion of a fluorine-containing copolymer, obtained by emulsion polymerization of:
- (a) at least one of perfluoroalkylalkyl acrylates and corresponding methacrylates represented by the general formula:
- CnF2n+1CmH2mOCOCR═CH2
- wherein R represents hydrogen atom or methyl group;
- n represents 4, 5, or 6;
- m represents 1, 2, 3, or 4,
- (b) benzyl acrylate or benzyl methacrylate,
- (c) vinylidene chloride, and
- (d) a cross-linkable group-containing polymerizable monomer;
- in the presence of a polyethylene oxide adduct type nonionic surfactant and an emulsifying aid composed of glycol-based compound, and
- (B) a blocked isocyanate added to the aqueous dispersion (A) in a weight ratio of 0.05 to 3.0 to the weight of the solid content of the aqueous dispersion (A),
- wherein the fluorine-containing copolymer has a copolymerization composition of 10 to 80% by weight of the component (a), 5 to 80% by weight of the component (b), 5 to 80% by weight of the component (c), and 0.5 to 40% by weight of the component (d).
Dependencies are inferred from the claim text.