ADDITION-CURABLE RUBBER COMPOSITION FOR ROLL AND ION CONDUCTIVE RUBBER ROLL

• Main Author: SHUTO SHIGEKI
• Format: Patent
• Language: English; Japanese
• Published: 17.11.2014
• Subjects: BEARINGS; BLASTING; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOLOGRAPHY; LIGHTING; MAGNETOGRAPHY; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHOTOGRAPHY; PHYSICS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WEAPONS

PROBLEM TO BE SOLVED: To provide an addition-curable rubber composition which has a good bubble releasing property, can provide a cured product having no bubble and stable electrical resistance, and is suitable for producing a rubber for a roll used for an electrophotographic image forming device and the like, and further to provide an ion conductive rubber roll having an ion conductive rubber layer arranged on an outer periphery of a roll axis, the rubber layer comprising a polyoxyalkylene and an organohydrogenpolysiloxane having solubility and low reactivity (low crosslinking reaction rate) thereof improved.SOLUTION: The addition-curable rubber composition for a roll comprising (A) polyoxyalkylene having at least two alkenyl groups in one molecule, (B) an organosilicon compound having 2 to 100 silicon atoms and having at least two hydrogen atoms bonded to silicon atoms (SiH groups) and having at least one arylene skeleton, (C) a catalyst for hydrosilylation reaction, (D) an ion conductivity-imparting agent, and (E) wet silica. 【課題】泡抜け性が良く、また気泡がなく、電気抵抗値の安定した硬化物が得られる、電子写真式画像形成装置等に用いられるロール用ゴムの製造に好適な付加硬化型ゴム組成物、更にロール軸の外周に、ポリオキシアルキレンとオルガノハイドロジェンポリシロキサンの溶解性、及び低反応性（低架橋反応率）を改善したイオン導電性ゴム層を設けたイオン導電性ゴムロールを提供する。【解決手段】（Ａ）一分子中に少なくとも２個のアルケニル基を有するポリオキシアルキレン、（Ｂ）一分子中に少なくとも２個のケイ素原子結合水素原子（ＳｉＨ基）を有し、かつアリーレン骨格を少なくとも１個有するケイ素原子数２〜１００の有機ケイ素化合物、（Ｃ）ヒドロシリル化反応触媒、（Ｄ）イオン導電性付与剤、及び（Ｅ）湿式シリカを含有するロール用付加硬化型ゴム組成物。【選択図】なし