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1. (WO2018042879) RUBBER-BASED PRESSURE-SENSITIVE ADHESIVE COMPOSITION, RUBBER-BASED PRESSURE-SENSITIVE ADHESIVE LAYER, PRESSURE-SENSITIVE ADHESIVE FILM, OPTICAL FILM WITH RUBBER-BASED PRESSURE-SENSITIVE ADHESIVE LAYER, OPTICAL MEMBER, AND IMAGE DISPLAY DEVICE

Pub. No.:    WO/2018/042879    International Application No.:    PCT/JP2017/024825
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Jul 07 01:59:59 CEST 2017
IPC: C09J 123/22
B32B 7/02
B32B 27/00
C09J 7/02
C09J 11/06
G02F 1/1335
G02B 5/30
Applicants: NITTO DENKO CORPORATION
日東電工株式会社
Inventors: SAWAZAKI,Ryohei
澤▲崎▼ 良平
MATSUMOTO,Masamichi
松本 真理
Title: RUBBER-BASED PRESSURE-SENSITIVE ADHESIVE COMPOSITION, RUBBER-BASED PRESSURE-SENSITIVE ADHESIVE LAYER, PRESSURE-SENSITIVE ADHESIVE FILM, OPTICAL FILM WITH RUBBER-BASED PRESSURE-SENSITIVE ADHESIVE LAYER, OPTICAL MEMBER, AND IMAGE DISPLAY DEVICE
Abstract:
The present invention provides a rubber-based pressure-sensitive adhesive composition which contains a rubber-based base polymer, the rubber-based base polymer comprising an isobutylene-based polymer having a polydispersity coefficient, (weight-average molecular weight)/(number-average molecular weight), of 4 or less. A 50 μm-thick rubber-based pressure-sensitive adhesive layer formed from the rubber-based pressure-sensitive adhesive composition has a moisture permeability at 40°C and 92% RH of 50 g/(m2∙day) or less. The rubber-based pressure-sensitive adhesive composition of the present invention can form a rubber-based pressure-sensitive adhesive layer which has low moisture permeability and has so high durability that the adhesive layer can be inhibited from suffering troubles including lifting and peeling even in high-temperature environments.