CURABLE SILICONE RUBBER COMPOSITION AND SILICONE RUBBER MEMBER

• Main Author: ISHIHARA YUKA
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2016
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To provide a curable silicone rubber composition which provides a silicone rubber hardened product excellent in dynamic fatigue durability when hardened.SOLUTION: A curable silicone rubber composition is based on (A) an organopolysiloxane of an average composition formula (I) RSiOhaving a polymerization degree of 100 or greater, (B) reinforcement silica of a specific surface area of 50 m/g or greater, measured by the BET adsorption method, (C) a silazane compound of formula (II) and (D) a hardener. In the formula (I), Rand Rare independently identical or different substituted/unsubstituted monovalent hydrocarbon groups and/or alkenyl groups free of an aliphatic unsaturated bond; and at least one of Rand Ris an alkenyl group.SELECTED DRAWING: None 【課題】硬化して動的疲労耐久性に優れたシリコーンゴム硬化物を与える硬化性シリコーンゴム組成物の提供。【解決手段】（Ａ）下記平均組成式（Ｉ）ＲaＳｉＯ(4-a)/2（Ｉ）で表される重合度が１００以上のオルガノポリシロキサン、（Ｂ）ＢＥＴ吸着法による比表面積が５０ｍ2／ｇ以上の補強性シリカ、（Ｃ）下記一般式（ＩＩ）で示されるシラザン化合物、（Ｄ）硬化剤を主成分としてなる硬化性シリコーンゴム組成物。（Ｒ1及びＲ2は各々独立に同一又は異種の脂肪族不飽和結合を有さない非置換又は置換一価炭化水素基又はアルケニル基；Ｒ1とＲ2のうち少なくとも１個はアルケニル基）【選択図】なし