RUBBER MOLDING

• Main Authors: YASUDA HIROAKI, HAMAMURA TAKEHIRO
• Format: Patent
• Language: English; Japanese
• Published: 30.06.2022
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To give an excellent plasma resistance to a rubber molding and to prevent a compound having a perfluoro-polyether skeleton from bleeding out.SOLUTION: There is provided a rubber molding in which a fluororubber composition comprising a component A of a base rubber containing a hydrogen-containing fluororubber as a main component, a component B of a compound having a perfluoro-polyether skeleton and a component C of a powder filler having a bulk density of 0.4 g/cm3 or less and having a ratio of the content of the component C to the content of the component B of larger than 0.1 in which a part or the whole of the component B contains an alkenyl group in the molecule is cross-linked and formed. The rubber molding has a higher CF bond concentration on the surface of the molding than the inside of the molding.SELECTED DRAWING: None 【課題】ゴム成形品に優れた耐プラズマ性を保持させるとともに、パーフルオロポリエーテル骨格を有する化合物がブリードアウトするのを抑制する。【解決手段】ゴム成形品は、水素含有フッ素ゴムを主成分として含むベースゴムのＡ成分と、パーフルオロポリエーテル骨格を有する化合物のＢ成分と、かさ密度が０．４ｇ／ｃｍ３以下の粉体フィラーのＣ成分とを含有するとともに、前記Ｂ成分の一部又は全部が分子内にアルケニル基を含み、且つ前記Ｃ成分の含有量の前記Ｂ成分の含有量に対する比が０．１よりも大きいフッ素ゴム組成物が架橋して形成されている。ゴム成形品は、成形品表面の方が成形品内部よりもＣＦ結合濃度が高い。【選択図】なし