| 摘要 |
PURPOSE:To provide a repeelable pressure-sensitive adhesive compsn. which makes it possible to repeat a bonding-peeling cycle comprising bonding it to various adherends and then peeling it off therefrom, containing a polymer obtd. by suspension-polymerizing an alkyl (meth)acrylate and an alpha-monoolefincarboxylic acid in the presence of casein. CONSTITUTION:A pressure-sensitive adhesive compsn. contains bondable fine copolymer particles obtd. by suspension-polymerizing a monomer component consisting of 70-99.9wt% C4-C12 alkyl acrylate and/or methacrylate (A), 0.1- 10wt% alpha-monoolefincarboxylic acid (B), and 0-29.9wt% other vinyl compd. (C) in the presence of protective colloid mainyl composed of casein in an aq. medium. Examples of component A are butyl acrylate, 2-ethylhexyl acrylate, etc. Examples of component B are (meth)acrylic acid, itaconic acid, maleic acid, etc.
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