公开(公告)号：US20210371574A1

公开(公告)日：2021-12-02

申请号：US17399512

申请日：2021-08-11

Applicant: AGC Inc.

Inventor： Makito NAKAMURA ,  Haru KAWASAKI ,  Hitoshi SHIMOMA ,  Chitoshi SUZUKI ,  Hiroshi WADA

IPC: C08G18/12 ,  C09J7/38 ,  C09J175/08 ,  C08G18/48 ,  A61B5/00

Abstract: To provide a polyurethane prepolymer whereby a pressure-sensitive adhesive having excellent moisture permeability and also having both low adhesion to skin and high adhesion to a substrate can be obtained, a pressure-sensitive adhesive, an adhesive skin patch, a pressure-sensitive adhesive tape, a wearable device and a wearable device kit.
A hydroxy group-terminated polyurethane prepolymer which is obtained by reacting an oxyalkylene polymer A having an average number of hydroxy groups per molecule of from 2.1 to 3, an oxyalkylene polymer B having one hydroxy group per molecule, and a diisocyanate compound, wherein the number average molecular weight of the oxyalkylene polymer B is at least 5,000, and the content of ethylene oxide units in the hydroxy group-terminated polyurethane prepolymer is more than 10 mass %, a pressure-sensitive adhesive, an adhesive skin patch, a pressure-sensitive adhesive tape, a wearable device and a wearable device kit.