Ethylene-propylene rubber

Japanese: エチレン・プロピレンゴム(英語表記)ethylene‐propylene rubber
Ethylene-propylene rubber
Abbreviation: EPR. Synthetic rubber copolymerized with ethylene and propylene. Ethylene and propylene copolymer rubber is called EPM, and rubber made into a ternary copolymer by adding a diene monomer as a third component is called EPDM, with the latter being the mainstream at present. EPM and EPDM are often collectively called ethylene-propylene rubber. EPR is obtained by blowing a mixed gas of ethylene and propylene into a hydrocarbon solvent containing a Ziegler catalyst, a combination of vanadium compounds and organoaluminum compounds, to copolymerize them.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
略称EPR。エチレンとプロピレンの共重合系合成ゴム。エチレンとプロピレンの共重合ゴムをEPM,これに第三成分としてジエンモノマーを加え三元共重合体としたゴムをEPDMとよび,現在は後者が主流である。EPM,EPDMをまとめてエチレン・プロピレンゴムとよぶことが多い。EPRはバナジウム化合物と有機アルミニウム化合物を組み合わせたチーグラー触媒を含む炭化水素溶媒中にエチレンとプロピレンの混合ガスを吹き込んで共重合させることによって得られる。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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