RE-STRIPPABLE PRESSURE-SENSITIVE ADHESIVE COMPOSITION AND PRODUCTION THEREOF

PURPOSE:To provide a pressure-sensitive adhesive compsn. which makes it possible to repeat an operation cycle comprising sticking it on various adherends and peeling it therefrom, containing a specified fine spherical tacky polymer powder and a specified polymer particle. CONSTITUTION:The titled compsn. contains a fine spherical tacky polymer powder (A) having an average particle size of 10-100mu obtd. by suspension-polymerizing 100pts.wt. monomer mixture consisting of 70-99.8wt% C4-C12 alkyl (meth)acrylate, 0.1-10wt% alpha-monoolefinic carboxylic acid, 0-29.8wt% other vinyl monomer and 0.1-10wt% one member selected from among petroleum resin, natural resin and their derivatives in an aq. medium and a fine polymer particle (B) having an average particle size of 0.1-4mu obtd. by polymerizing 20-300pts.wt. vinyl monomer in an aq. medium. Though the re- strippability of the fine spherical tacky polymer powder is improved with an increase in particle size, adhesion, anchoring properties, stability on standing and coatability are lowered, so that a powder having an average particle size of 10-100mu is preferred. Further, by incorporating fine polymer particles having a particle size of 0.1-4mu, the spherical polymer powder can be prevented from being precipitated.