| 摘要 |
PURPOSE:To obtain a pressure-sensitive adhesive which has excellent adhesiveness, blocking resistance, abrasion resistance, heat resistance, etc., and is suitable for sticking of, e.g., a letter form sealed by folding in three, by incorporating a tackifier and a silica gel into a chloroprene rubber latex. CONSTITUTION:100pts.wt. tackifier (e.g., a rosin or a polyterpene resin) is added to 100pts.wt. chloroprene rubber latex to improve the adhesive power and the long-term stability thereof, to which 5-40pts.wt. fine powder of silica gel is added to improve the blocking resistance, abrasion resistance, heat resistance, etc., thus giving an objective pressure-sensitive adhesive. As the silica gel, a fine powder having an average particle diameter of about 1-10mum is preferable. If necessary, a dispersing agent, a wetting agent, an anti-foaming agent, etc., can also be added to the chloroprene rubber latex in addition to the tackifier and silica gel.
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