Cao su nitrile (NBR) được dùng chủ yếu trong các ứng dụng kháng dầu. Có nhiều dạng biến thể của cao su nitrile, một trong số đó là HNBR. Các tính chất chung của loại cao su này được trình bày bên dưới.

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The most important chemical modification is hydrogenation of the NBR so that little of the unsaturation remains. This results in a product with much improved resistance to oxidation and weathering, but with little or no sacrifice of other useful properties. Hydrogenated nitrile rubber (HNBR) is produced by a catalytic solution hydrogenation of the butadiene unsaturation in the polymer. Owing to the largely saturated backbone of the rubber it has significantly better high temperature and ageing resistance compared to NBR. As in NBR, HNBR with different ACN contents is also available. Finally, versions of HBNR containing incorporated methacrylic acid are available. This acid functionality leads to excellent polymer-filler interaction in compounds. Applications for HNBR take advantage of the excellent resistance to organic fluids. However, the increased high temperature performance of the HNBR makes it far superior to NBR in critical applications.

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Trích đăng từ sách Rubber Technologist’s Handbook, Sadhan K. De và Jim R. White, Smithers Rapra Technology, trang 69, 2001

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