The most representative synthetic rubber with properties similar to natural rubber. It is made by emulsion polymerization of styrene and butadiene. It has versatile properties and accounts for 60% of synthetic rubber consumption. It is divided into hot rubber and cold rubber depending on the temperature during polymerization, but about 80% of the total is cold rubber polymerized at 5°C. It is characterized by oil resistance, abrasion resistance, and aging resistance, and is used for automobile tires and footwear. There are also carbon-containing SBR, oil-containing SBR, lignin-containing SBR, and high styrene SBR. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
天然ゴムに近い性質をもった最も代表的な合成ゴム。スチレンとブタジエンの乳化重合によってつくられる。汎用的性質があり,合成ゴムの消費量の 60%を占める。重合の際の温度によってホットラバーとコールドラバーに分けられるが,全体の約 80%は5℃で重合させたコールドラバーである。耐油性,耐摩耗性,耐老化性などが特長で,自動車タイヤや履物に用いる。またカーボン入り SBRと油入り SBR,リグニン入り SBR,ハイスチレン SBRなどがある。
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