Aqueous dispersion type pressure-sensitive adhesive composition and pressure-sensitive adhesive product
AssigneeNitto Denko Corporation
InventorsYutaka Tosaki, Hideki Nagatsu, Shinichi Kouno, Takahiro Yatagai
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AssigneeNitto Denko Corporation
InventorsYutaka Tosaki, Hideki Nagatsu, Shinichi Kouno, Takahiro Yatagai
Estimating the term…
An aqueous dispersion type pressure-sensitive adhesive composition contains a polyalkylene glycol having a weight-average molecular weight of from 20,000 to 5,000,000 or at least one hydrophilic polymer selected from the group consisting of polyvinylpyrrolidone, poly(vinyl alcohol)s, and poly((meth)acrylic acid) in an amount of from 0.5 to 15 parts by weight per 100 parts by weight, on a solid basis, of the acrylic or rubber-based pressure-sensitive adhesive composition of the aqueous dispersion type; and a pressure-sensitive adhesive product contains a pressure-sensitive adhesive layer formed from the aqueous dispersion type pressure-sensitive adhesive composition.
An aqueous dispersion type pressure-sensitive adhesive composition which consists essentially of a polyalkylene glycol having a weight-average molecular weight of from 450,000 to 1,000,000 in an amount of from 0.5 to 15 parts by weight per 100 parts by weight, on a solid basis, of an acrylic pressure-sensitive adhesive composition of the aqueous dispersion type containing an acrylic polymer having a glass transition point of −20° C. or lower and a weight-average molecular weight of at least 200,000, whereby the polyalkylene glycol is incorporated into the composition in the form of an aqueous solution after the polymerization of the acrylic polymer and
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