Two-step polymerization process and product thereof

Details Two-step polymerization process and product thereof Two-step polymerization process and product thereof

1975-10-30

1977-07-12

Holler, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C08F29708, C08F29706

Patent

active

040354440

ABSTRACT:
A two-step process comprises (A) polymerizing ethylene in the presence of a catalyst comprising (1) at least one organoaluminum compound, (2) at least one titanium tetrahalide and (3) optionally, at least one Lewis base, and (B) thereafter polymerizing isoprene in the presence of the step (A) reaction mixture. The reaction product contains polymerized therein about 0.05 to about 2.2 weight percent ethylene. The reaction product has satisfactory green strength and monomer conversion efficiency together with excellent processability.

REFERENCES:
patent: 3684785 (1972-08-01), Hasegawa et al.
Chemical Abstracts, 62, 6565e (1965).

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