SEAL MEMBER

• Main Authors: IIZUKA HIDETAKA, OTA HIDEO
• Format: Patent
• Language: English; Japanese
• Published: 31.10.2019
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; DYES; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

To provide a seal member having high ethanol resistance.SOLUTION: There is provided a seal member having: an elastic deformable substrate; a photosetting coated film manufactured on at least a part of a surface of the substrate by using a composition containing an urethane prepolymer having a photoreactive group at a terminal and containing a polyester bond in a polymer skeleton, and polythiol. The photoreactive group is a group having an ethylenic unsaturated bond, a thiol-ene ratio in the polythiol and the urethane prepolymer is 0.5 to 2.0, average functional group of the polythiol is 3 or higher functional, and weight average molecular weight of the urethane prepolymer is 2,500 to 70,000.SELECTED DRAWING: None 【課題】本発明は、高い耐エタノール性を有するシール部材を提供することを課題とする。【解決手段】弾性変形可能な基体と；末端に光反応性基を有し且つポリマー骨格内にポリエステル結合を含むウレタンプレポリマーと、ポリチオールと、を含む組成物を用いて、前記基体の表面の少なくとも一部に作製された光硬化皮膜と；を備えたシール部材であって、前記光反応性基が、エチレン性不飽和結合を有する基であり、前記ポリチオールと前記ウレタンプレポリマーにおけるチオール−エン比は、０．５〜２．０であり、前記ポリチオールの平均官能基は、３官能以上であり、前記ウレタンプレポリマーの重量平均分子量は、２，５００〜７０，０００であることを特徴とするシール部材。【選択図】なし