Takeda Chemical Industries, Inc.

Jun-ichi Miyake

Yoshio Kamatani

Kyuya Yamazaki

Disclosed in a two-package type pressure-sensitive adhesive composition which comprises (1) a polyol component having an average molecular weight of about 500 to 100,000 and (2) a polyurethane having terminal free isocyanate group obtained by the reaction of an isocyanate component having oxadiazine-2,4,6-trione ring and a polyol component having an average molecular weight of about 62 to 500 and if necessary, other organic diisocyanate at a specific proportion. The composition has an excellent heat resistance and stable pressure-sensitive adhesion.

Two-package type pressure-sensitive adhesive composition prepared from a

Disclosed is a one-can type pressure-sensitive adhesive composition which contains a polyurethane polyol obtained by the reaction of an isocyanate component having oxadiazine-2,4,6-trione ring, other organic diisocyanate and a polyol component having a molecular weight of 400 to 50,000 at a specific proportion. This composition has an excellent heat resistance, stable pressure-sensitive adhesion, holding power and tackiness.

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Osaka, Japan

Jun-ichi Miyake