| 摘要 |
PURPOSE:To obtain a tacky adhesive which has excellent tackiness and scarcely suffers loss of tackiness at low and high temperature, by mixing a styrene/ conjugated diene/styrene block copolymer and a styrene/conjugated diene block copolymer. CONSTITUTION:A tacky adhesive composition containing a styrene/conjugated diene/styrene block copolymer and a styrene/conjugated diene block copolymer. As the styrene/conjugated diene/styrene block copolymer, a styrene/isoprene/ styrene block copolymer in particular is suitably used. A styrene/conjugated diene block copolymer which has a molecular weight of 10,000-50,000, a weight ratio of styrene to conjugated diene of 5/95-50/50, and a content of the 1, 4 linkages of the conjugated diene component of 70% or higher is generally used. A styrene/conjugated diene/styrene block copolymer and a styrene/ conjugated diene block copolymer are used usually in a weight ratio of 97/3-60/40.
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