URETHANE PRESSURE-SENSITIVE ADHESIVE COMPOSITION AND PRESSURE-SENSITIVE ADHESIVE FILM APPLIED WITH THE SAME

To provide: a pressure-sensitive adhesive which has good removability even when left in high temperature and high humidity environment and exhibits good appliability when applied to a base film; and a pressure-sensitive film applied with the pressure-sensitive adhesive.SOLUTION: An urethane pressure...

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Bibliographische Detailangaben
1. Verfasser:	MIZUMA KENTA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY DYES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS POLISHES USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	To provide: a pressure-sensitive adhesive which has good removability even when left in high temperature and high humidity environment and exhibits good appliability when applied to a base film; and a pressure-sensitive film applied with the pressure-sensitive adhesive.SOLUTION: An urethane pressure-sensitive adhesive composition is composed of: a polyfunctional isocyanate; and a polyurethane polyol which is a reaction product of difunctional isocyanate and a polyether polyol including at least polytetramethylene glycol and a trifunctional polyol, wherein a ratio of a total number of moles of OH groups and a total number of moles of NCO groups, NCO group/OH group, is 1.1 to 1.8.SELECTED DRAWING: None 【課題】高温高湿環境下に放置された場合でも、良好な再剥離性を有すると共に、ベースフィルムに塗布する際の塗工性が良好である粘着剤、及びこれを塗布した粘着フィルムを提供する。【解決手段】ポリテトラメチレングリコールと３官能ポリエーテルポリオールを少なくとも含むポリエーテルポリオールと２官能イソシアネートとの反応物であるポリウレタンポリオールと、多官能イソシアネートから成り、ポリエーテルポリオールのＯＨ基と、イソシアネートのＮＣＯ基モル数合計の比がＮＣＯ基／ＯＨ基＝１．１～１．８であることを特徴とするウレタン粘着剤組成物である。【選択図】なし