Urethane prepolymer, adhesive, skin patch material, adhesive tape, wearable device, and wearable device kit

Abstract

Provided are a urethane prepolymer from which is obtained an adhesive which has excellent moisture permeability and which attains both low adhesion to skin and high adhesion to a base material, an adhesive, a skin patch material, an adhesive tape, a wearable device, and a wearable device kit. The urethane prepolymer is a hydroxyl-group-terminated urethane prepolymer obtained by reacting an oxyalkylene polymer A having an average number of hydroxyl groups per molecule of 2.1 to 3, an oxyalkylene polymer B in which the number of hydroxyl groups per molecule is 1, and a diisocyanate compound, the number-average molecular weight of the oxyalkylene polymer B being 5000 or greater, and the content of ethylene oxide units in the hydroxyl-group-terminated urethane prepolymer being more than 10 mass %.

Dependencies are inferred from the claim text.