Concrete piece and exfoliation preventing one -component polyurethane resin composition of the tiles and concrete pieces using the same and a method of preventing spalling of the tile

摘要

The present invention provides a one-component type polyurethane resin composition for preventing detachment of concrete pieces and tiles containing an isocyanate group-containing urethane prepolymer (A) and a thixotropy-imparting agent (B), and a method for forming a reinforcing layer on a surface of a concrete structure or tiled wall containing a resin coated film composed thereof, in order to provide a one-component type polyurethane resin composition for preventing detachment of concrete pieces and tiles, which has superior workability by being able to be applied with a trowel or brush, forms a transparent resin coated film after reactive curing that has superior weather resistance without applying a top coat, facilitates diagnosis of deterioration of concrete by being carried out visually during maintenance of concrete structures, is able to maintain the existing appearance of the tiled exteriors of buildings and other structures and eliminates dispersion to surrounding areas during application, and a method for preventing detachment of concrete pieces and tiles that uses this composition.