According to the catalytic system, the technologies used by the world's shunding rubber production companies can be divided into five major systems: nickel, cobalt, lithium, titanium, and rare earth (neodymium).Titanium, nickel and cobalt system is the mainstream in elimination trend, rare earth system in the development stage, lithium is butadiene rubber is mainly used for production, impact polystyrene modification for the nickel butadiene is our country in the 1960 s the successful development of highly active nickel catalysts, respectively in 1965 in jinzhou, lanzhou, began to industrialized production, butadiene rubber production of new technological achievements in 1985, special-class award of national scientific and technological progress, after half a century of several generations efforts, China's nickel production technology and nickel butadiene product quality in the world advanced level.
鎳催化系統的特徵：
1。鎳催化系統是一個多組分系統。催化劑的劑量比，進食模式和衰老模式不僅會影響催化系統的活性，還會影響聚合物的分子量。
2，鎳催化劑系統的穩定性，聚合溫度，以適應較大的範圍，反應溫度以上的溫度超過120度，系統仍未失活，具有良好的溫度抗性。
3。鎳催化系統具有良好的方向性，並且受催化劑量和單體濃度的影響較小。
4。鎳催化的系統在聚合過程中導致丁二烯的大量鏈傳遞，從而導致鏈終止。
稀土催化系統的聚合特徵：
1。飽和烴己烷用作溶劑，有利於環境保護；
2。高單體轉化率，甚至達到100％；
3。產生交聯反應並產生凝膠並不容易。