ADHESIVE AND ADHESIVE TAPE

• Main Authors: TANABE SHINGO, SAITO SHUHEI, ISHIZU TOMOYO, FUKUTA KATSUNORI
• Format: Patent
• Language: English; Japanese
• Published: 06.10.2016
• 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

PROBLEM TO BE SOLVED: To provide an adhesive for re-detachment of a display device showing a curve shape, especially for re-detachment suitable for an adhesive sheet for protection or an adhesive sheet for process temporary fixing such as a curve glass or a hard coat conducted film and further excellent in wettability.SOLUTION: There is provided an adhesive containing an urethane prepolymer (A), a multifunctional polyol (B) and an isocyanate curing agent (C), where the urethane polymer (A) is a polymer having molecular dispersion degree of 4 to 12 by reacting an isocyanate group of polyisocyanate (b) and a hydroxyl group of polyol (a) with molar ratio of NCO/OH=0.5 to 0.9.SELECTED DRAWING: None 【課題】本発明は、湾曲した形状を呈する表示装置の再剥離用、特に湾曲したガラスやハードコートが施されたフィルム等の保護用粘着シートや工程仮固定用粘着シートに好適であり、さらに濡れ性に優れる再剥離用粘着剤を提供することを目的とする。【解決手段】ウレタンプレポリマー（Ａ）、多官能ポリオール（Ｂ）、イソシアネート硬化剤（Ｃ）を含み、前記ウレタンプレポリマー（Ａ）は、ポリイソシアネート（ｂ）のイソシアネート基とポリオール（ａ）の水酸基とをＮＣＯ／ＯＨ＝０．５〜０．９のモル比で反応させた、分子量分散度が４〜１２のポリマーである、粘着剤。【選択図】なし