PURPOSE: To obtain the titled sheet having a slight change in adhesiveness with time, by applying an aqueous emulsion composition prepared through two-stage emulsion polymerization of a polymerizable monomer consisting of an alkyl acrylate essentially to a sheet to form an acrylic rubber layer.
CONSTITUTION: A sheet obtained by applying an aqueous emulsion composition prepared through two-stage emulsion polymerization of (A) 50W90wt% a polymerizable monomer for the first stage consisting of (i) 85W99wt% a main monomer consisting of 50wt% or more 4W12C alkyl ester of acrylic acid, preferably n-butyl acrylate, and other acrylic and vinyl monomers copolymerizable with the alkyl ester and (ii) 1W15wt% α,β-unsaturated carboxylic acid (anhydride) and then (B) 10W 50wt% polymerizable monomer for the second stage consisting of said acrylic ester alone or the component (i) to a sheet to form an acrylic rubber layer.
EFFECT: Good releasability, anchoring force to a support and improved machinability of a metal plate.
SUGII TETSUJI
UEMURA TAKEMASA
SOU ISAO
IOHARA GI
NOMURA YOUICHI
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