PRESSURE SENSITIVE ADHESIVE COMPOSITION FOR HEAT-RESISTANT PRESSURE SENSITIVE ADHESIVE SHEET, HEAT-RESISTANT PRESSURE SENSITIVE ADHESIVE SHEET, AND LAYERED BODY

• Main Authors: KANZAKI TENSHIN, KANO HAJIME, KAMOI AKIRA
• Format: Patent
• Language: English; Japanese
• Published: 24.09.2020
• Subjects: 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

To provide a pressure sensitive adhesive composition for a heat-resistant pressure sensitive adhesive sheet, in which foaming from an obtained adhesive layer is suppressed, and suppression of fouling of an adherend is excellent in the case of peeling an adhesive layer from the adherend even after heat treatment under a high-temperature condition of, for example, 240°C or more.SOLUTION: There are provided: a pressure sensitive adhesive composition for a heat-resistant pressure sensitive adhesive sheet including a (meth)acrylic copolymer including a constitutional unit from ethyl acrylate and a constitutional unit from a (meth)acrylic monomer including a nitrogen atom and a hydroxy group, and a crosslinking agent, in which the ratio of the molar number of a functional group in the crosslinking agent to the total molar amount of a hydroxy group included in the (meth)acrylic copolymer is in a range of 0.1 or more and 1.0 or less; a heat-resistant pressure sensitive adhesive sheet; and a layered body.SELECTED DRAWING: None 【課題】例えば、２４０℃以上の高温条件下で熱処理した後であっても、得られる粘着剤層からの発泡が抑制され、かつ、被着体から粘着剤層を剥離したときの被着体の汚染の抑制に優れる耐熱性粘着シート用粘着剤組成物を提供する。【解決手段】エチルアクリレートに由来する構成単位と、窒素原子とヒドロキシ基とを有する（メタ）アクリル系モノマーに由来する構成単位と、を含む（メタ）アクリル系共重合体と、架橋剤と、を含み、前記（メタ）アクリル系共重合体に含まれるヒドロキシ基の全モル数量に対し、前記架橋剤の官能基のモル数の比が、０．１以上１．０以下の範囲である、耐熱性粘着シート用粘着剤組成物、耐熱性粘着シート、及び、積層体。【選択図】なし