RUBBER BASED PRESSURE-SENSITIVE ADHESIVE AND ADHESIVE SHEETS THEREFROM

PURPOSE:To obtain the subject adhesive consisting of specific ratio of each specific polyisobutylene, etc., rubber and tackiness-providing agent, etc., having prescribed gel fraction and having excellent adhesion strength without carrying out buffing or primer coating, and suitable as automotive mem...

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Bibliographische Detailangaben
Hauptverfasser:	UMEDA MICHIO, ONISHI HIROHITO
Format:	Patent
Sprache:	eng
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:	PURPOSE:To obtain the subject adhesive consisting of specific ratio of each specific polyisobutylene, etc., rubber and tackiness-providing agent, etc., having prescribed gel fraction and having excellent adhesion strength without carrying out buffing or primer coating, and suitable as automotive members, etc. CONSTITUTION:The objective adhesive consisting essentially of (A) 100 pts.wt. polyisobutylene, butyl rubber or halogenated butyl rubber having 200000-1500000 weight-average molecular weight, (B) 30-300 pts.wt. liquid is semi-liquid rubber having < 10000-50000 weight-average molecular weight and (C) 30-300 pts.wt. tackiness-providing agent or/and softening agent having < 100000 weight-average molecular weight, and being 10-40% in gel fraction. Furthermore, layers of the adhesive are provided on both faces of a substrate to provide the adhesive sheets.