| 摘要 |
PURPOSE:To prevent skin-forming phenomena, a drawback of aqueous emulsion type tackifier, effectively and to improve adhesiveness characteristics of aqueous pressure-sensitive adhesive, by blending the aqueous emulsion type tackifier with a water-soluble salt of casein as a skin-forming inhibitor. CONSTITUTION:(A) 100pts.wt. (solid content) aqueous emulsion type tackifier comprising rosin and/or rosin derivative (e.g., at least one consisting of fumarated rosin, maleinized rosin, rosin ester, maleinized rosin ester and fumarated rosin ester, having 70-140 deg.C softening point) as a dispersed phase and water as continuous phase is blended with (B) 0.1-5pts.wt. water-soluble salt of casein to provide skin-forming prevention properties without lowering adhesiveness of characteristic aqueous emulsion type pressure-sensitive adhesive.
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