| 摘要 |
PURPOSE:The titled adhesive composition having long adhesivity retention time, improved workability, high initial bond strength, obtained by blending a self- crosslinking acrylic dispersion with a phenolic resin dispersion, and a self-emulsifiable polyurethane dispersion in a specific ratio. CONSTITUTION:(A) 30-60wt% self-crosslinking acrylic dispersion (e.g., mixture of vinyl acetate and/or vinyl propionate with acrylonitrile and/or methacrylonitrile, etc.) is blended with (B) 20-50wt% phenolic resin dispersion, and (C) 20-50wt% (calculated as solid content) self-emulsifiable polyurethane dispersion (preferably one obtained by introducing amino group, etc. to polyurethane, emulsifying and dispersing it without using emulsifying agent), to give the desired adhesive composition. Since the component C will be agglomerated and separated by extreme change in pH, the pH of the components A and B is preferably made equal to that of the component C.
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