THERMAL SWITCH

• Main Authors: TAKAMATSU NARUAKI, KATAYAMA NAOKI, KATAYAMA KAZUTAKA
• Format: Patent
• Language: English; Japanese
• Published: 15.09.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; RELAYS; SELECTORS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a thermal switch superior in switching between the heat dissipation property and the heat retaining property by improving a material of an elastic thermal expansion member of which the volume reversibly changes accompanying the change in temperature.SOLUTION: A thermal switch comprises: a first base material; a second base material; and an elastic thermal expansion member interposed between the first and second base materials, connecting the first and second base materials as the expansion under a given temperature condition, and forming a heat transfer path from the first base material to the second base material. The elastic thermal expansion member is a crosslinked material of a composition containing (A) a crosslinkable elastomer, (B) a heat-conducting filler, and (C) a crosslinking agent. The elastic thermal expansion member has an average linear thermal expansion coefficient of 1×10-4/K to 10×10-4/K in a range of 0-100°C.SELECTED DRAWING: Figure 1 【課題】温度変化に伴いその体積が可逆的に変化する弾性熱膨張部材の材料を改良することにより、放熱性と保温性の切り替えが優れた熱スイッチを提供することを課題とする。【解決手段】第一基材と、第二基材と、該第一基材と該第二基材との間に介在され、所定の温度条件下で膨張することにより、該第一基材と該第二基材とを接続し、該第一基材から第二基材への熱伝達経路を構成する弾性熱膨張部材と、を備える熱スイッチであって、該弾性熱膨張部材は、（Ａ）架橋可能なエラストマー、（Ｂ）熱伝導性フィラー、（Ｃ）架橋剤、を含む組成物の架橋物であり、該弾性熱膨張部材は、０～１００℃の平均線熱膨張係数が１×１０－４／Ｋ～１０×１０－４／Ｋであることを特徴とする熱スイッチ。【選択図】図１