反应详情

Ethylene, propylene, 5-ethylidene-2-norbornene and dicyclopentadiene were continuously co-polymerized in a 100-liter polymerization vessel, made of stainless steel, equipped with stirring blades. Briefly, hexane was continuously fed as a solvent for polymerization to a lower site of the polymerization vessel at a rate of 83 liters/hour. On the other hand, the polymerization solution was continuously withdrawn from an upper site so that the polymerization solution in the polymerization vessel was 100 liters. Ethylene, propylene, 5-ethylidene-2-norbornene and dicyclopentadiene were continuously fed as monomers at the lower site of the polymerization vessel at rates of 3.00 kg/hour, 2.00 kg/hour, 0.60 kg/hour and 0.03 kg/hour, respectively, into the polymerization vessel. Dimethylsilyl (tetramethylcyclopentadienyl) (3-tert-butyl-5-methyl-2-phenoxy) titanium dichloride, triphenylmethyl tetrakis(pentafluorophenyl)borate and triisobutyl aluminum were continuously fed as catalysts at the lower site of the polymerization vessel at rates of 0.045 g/hour, 1.378 g/hour and 2.640 g/hour, respectively, into the polymerization vessel. The molecular weight was adjusted with hydrogen. The co-polymerization reaction was effected at 89° C. by feeding low-pressure steam into a jacket attached outside the polymerization vessel. The polymerization solution withdrawn from the polymerization vessel was treated with a small amount of ethanol to quench the polymerization reaction, stripped of the monomers and washed with water. Then the solvent was removed by treating with steam in a large amount of water to separate a copolymer, which was dried at 80° C. for a day and night under reduced pressure. By the above procedure, ethylene/propylene/5-ethylidene-2-norbornene/dicyclopentadiene copolymer was produced at a rate of 3.6 kg/hour. Detailed results are shown in Table 1.

1. customequipped with stirring blades
2. customOn the other hand, the polymerization solution was continuously withdrawn from an upper site so that the polymerization solution in the polymerization vessel
3. customThe co-polymerization reaction
4. customwas effected at 89° C.
5. customThe polymerization solution withdrawn from the polymerization vessel
6. additionwas treated with a small amount of ethanol
7. customto quench
8. customthe polymerization reaction
9. washwashed with water
10. customThen the solvent was removed
11. additionby treating with steam in a large amount of water
12. customto separate a copolymer, which
13. customwas dried at 80° C. for a day and night under reduced pressure