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 hi kum 1960 s-a kan ram a ni a, kum 1965-a Jinzhou, Lanzhou-a nickel catalysts active tak takte hlawhtling taka siam chhuah a ni a, chu chuan industrialized production a ṭan a, butadiene rubber siam chhuah, kum 1985-a technological achievement thar siam chhuah, national scientific leh technological progress-a special-class award of national scientific and technological progress, kum zabi engemaw zat chhunga generations-te’n an siam chhuah, China-in a siam chhuah level. a ni.
Nickel catalytic system ziarang:
1. Nickel catalytic system hi multicomponent system a ni a. dosage ratio, feeding mode leh aging mode of catalysts te hian catalytic system activity a nghawng mai bakah polymer molecular weight a nghawng bawk.
2, nickel catalyst system stability, polymerization temperature, range zau takah insiamrem turin, reaction temperature 120℃aia sang , system chu inactivation a la ni lo, temperature resistance tha tak a nei.
3. Nickel catalytic system hian directivity tha tak a nei a, catalyst awm zat leh monomer concentration. hian a nghawng tlem zawk.
4. Nickel catalyzed system chuan polymerization process chhungin butadiene chain transfer tam tak a thlen a, chu chuan chain termination. a thlen a ni.
Rare Earth catalytic system-a polymerization characteristics:
1. Saturated hydrocarbon hexane hi solvent atan hman a ni a, hei hi boruak humhalh nan a tha hle a;
2. monomer conversion rate sang tak, 100% thleng pawh;
3. Cross-linking reaction siam chhuah leh gel siam chhuah hi thil awlsam a ni lo.