【摘要】 采用新型钌系催化剂(SP-5-53)-[1,3-双(2,4,6-三甲基苯基)-2-咪唑烷基亚基]羰基氯氢(三环己基膦)钌对丁腈橡胶(NBR)进行溶液加氢，制备了高性能氢化丁腈橡胶(HNBR)。考察了催化剂对C=C双键的选择性及催化剂用量、氢气压力、反应釜填充度、胶液固含量、反应釜搅拌速度等不同条件对NBR溶液加氢反应的影响。同时进一步讨论了所用催化剂的加氢机理及所得HNBR结构与性能，包括凝胶含量、相对分子质量、硫化特性、物理机械性能、耐热空气老化性能和耐油性能。加氢结果表明，该钌系催化剂可以选择性催化加氢于NBR分子链上的C=C双键而保留腈基三键(-CN)。且当催化剂用量为丁腈橡胶质量分数的0.07%时，反应7 h可得到加氢度99%以上且不含凝胶的HNBR产品。性能测试结果表明，使用该钌系催化剂制备的HNBR的耐油性和耐老化性能相较于同系列进口产品Therban 3406均有所提升。更多还原

【Abstract】 High-performance hydrogenated nitrile rubber(HNBR) was prepared by solution hydrogenation of nitrile-butadiene rubber(NBR) using the novel ruthenium-based catalyst(SP-5-53)-[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene] carbonylchlorohydrido(tricyclohexylphosphine) ruthenium.The selectivity of the catalyst towards double bonds and the effects of different conditions, such as catalyst dosage, hydrogen pressure, reactor filling degree, solid content of the rubber solution, and reactor stirring speed, on the solution hydrogenation reaction of NBR were investigated.Meanwhile, the hydrogenation mechanism of the catalyst used and the structure-property relationships of the obtained HNBR,including gel content, molecular weight, vulcanization characteristics, physical and mechanical properties, heat aging resistance in air, and oil resistance, were further discussed.The results show that the catalyst can selectively catalyze the hydrogenation of carbon-carbon double bonds in the molecular chain of nitrile rubber while retaining the cyano group.Moreover, when the catalyst dosage is 0.07% of the mass fraction of nitrile-butadiene rubber, an HNBR product with a hydrogenation degree of over 99% and free of gel can be obtained after a 7-hour reaction.The oil resistance and aging resistance of HNBR prepared using this catalyst are improved compared with those of the imported product Therban 3406 in the same series.更多还原