To provide a pressure-sensitive adhesive which uses polyurethane as a base.
The pressure-sensitive adhesive which uses polyurethane as a base is characterized in that the polyurethane includes at least a chemical reaction product of the following starting materials: (a) polyisocyanate which includes at least a kind of aliphatic or alicyclic diisocyanate, and at least a kind of aliphatic or alicyclic polyisocyanate which has 3 or 3 or more isocyanate functionalities, wherein the substance amount fraction as the proportion of a polyisocyanate of the aliphatic or alicyclic polyisocyanate which has 3 or 3 or more isocyanate functionalities is at least 18%, and (b) at least a kind of a hydroxyl functional polyurethane prepolymer of pressure-sensitive adhesion.
WEILAND KIRSTIN
GOUTTEFARDE ROSE-MARIE
Blacksmith
Katsunori Uenishi
Ichiro Torayama
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