HOT-MELT COMPOSITION AND HOT-MELT ADHESIVE

To provide a novel hot-melt composition using polyvinyl acetal as a base polymer and further provide a hot-melt composition that has excellent adhesion, heat resistance, bleeding resistance, and flexibility and is suitable as a hot-melt adhesive.SOLUTION: A hot-melt composition contains, relative to...

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Bibliographische Detailangaben
Hauptverfasser:	TAMURA CHUYA, TSUGE KIYONOBU, OBA HIROYUKI, YAMAUCHI TOMONOBU
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 novel hot-melt composition using polyvinyl acetal as a base polymer and further provide a hot-melt composition that has excellent adhesion, heat resistance, bleeding resistance, and flexibility and is suitable as a hot-melt adhesive.SOLUTION: A hot-melt composition contains, relative to (A) polyvinyl acetal 100 pts.mass, (B) a tackifier resin with a softening point of 70-150°C of 5-60 pts.mass and (C) a plasticizer that is liquid or semisolid at room temperature of 10-40 pts.mass. The hot-melt composition has a melt viscosity of 1,000-100,000 mPa s at 180°C.SELECTED DRAWING: None 【課題】ベースポリマーとしてポリビニルアセタールを用いる新規なホットメルト組成物を提供すること。さらに、接着性、耐熱性、耐ブリード性、可撓性に優れ、ホットメルト接着剤として好適なホットメルト組成物を提供すること。【解決手段】（Ａ）ポリビニルアセタール１００質量部当たり、（Ｂ）軟化点が７０〜１５０℃の粘着付与樹脂５〜６０質量部、および（Ｃ）室温で液体もしくは半固体状の可塑剤１０〜４０質量部を含有してなり、１８０℃での溶融粘度が１，０００〜１００，０００ｍＰａ・ｓであることを特徴とするホットメルト組成物である。【選択図】なし