加拿大丁腈橡胶在油封胶料中的应用

Application of Canadian Nitrile Rubber in Seals Compound

考察加拿大丁腈橡胶NBR801（丙烯腈含量40％）和NBR802（丙烯腈含量18％）在回转轴油封胶料中的应用。结果表明：主体材料采用NBR801／NBR802（并用比85／15）并用，补强剂采用滚筒法炭黑，半补强炉法炭黑（并用比45／25）并用，填充剂采用25份碳酸钙，硫黄用量2～3份，促进剂采用促进剂M／DM／D（并用比1／0．5／0．7）并用，增塑剂采用邻苯二甲酸二丁酯，松焦油（并用比10／2．5）并用，油封胶料的物理性能、耐磨性能、耐低温性能和耐油性能较好，成品油封性能达到使用要求。

In this study, the application of Canadian nitrile rubber NBR801 （acrylonitrile content of 40%） and NBR802 （acrylonitrile content of 18%） in the rotary shaft oil seal compound was investigated. The optimized compound formulation was as follows： rubber material was NBR801/NBR802 at the blending ratio of 85/15, reinforcement system was blend of roller carbon black/semi-reinforcing furnace black with the ratio of 45/25, 25 parts of calcium carbonate was applied as filler, sulfur dosage was 2 to 3 parts, accelerators M/DM/D were at the ratio of 1/0.5/0.7, and plasticizers were dibutyl phthalate and pine tar with the ratio of 10/2.5. The physical properties, wear resistance, low temperature resistance and oil resistance of the compound were excellent, the functional performance of finished seal fully met the application requirement.