| 摘要 |
PROBLEM TO BE SOLVED: To provide an aqueous resin dispersion necessary for a novel one-pack coating that is used for a porous inorganic substrate used in building material/construction fields, civil engineering fields and the like, particularly for inorganic building materials such as outer wall materials, roof materials and the like of a prefabricated housing and the like, is excellent in permeability into and adhesion to a substrate and reinforcing effects for the substrate and exhibits excellent dryability and blocking resistance, and a coating of the same. SOLUTION: The coating comprises as an essential ingredient an aqueous resin dispersion obtained by emulsion-polymerizing (1) 10-40 wt.% of acrylonitrile, (2) 30-80 wt.% of anα,β-ethylenically unsaturated monomer other than acrylonitrile giving a homopolymer having a glass transition temperature (Tg) of 50°C or higher and (3) the remainder of otherα,β-ethylenically unsaturated monomers, more preferably an aqueous resin dispersion obtained by two-step emulsion polymerization where at least 80 wt.% of acrylonitrile of the total acrylonitrile used in the first and the second steps are polymerized in the second step. COPYRIGHT: (C)2010,JPO&INPIT
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