Polymerization of alpha-olefins with novel T.sub.n MR'.sub.3-n c

Details Polymerization of alpha-olefins with novel T.sub.n MR'.sub.3-n c Polymerization of alpha-olefins with novel T.sub.n MR'.sub.3-n c

1980-02-15

1981-07-07

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526124, 526125, 526139, 526140, 526141, 526142, 526351, C08F 462, C08F 1006

Patent

active

042775906

ABSTRACT:
A new improved catalyst system for alpha-olefin type polymerizations includes a metal alkyl cocatalyst having the formula T.sub.n MR'.sub.3-n in combination with a Group IVB-VIII transition metal compound on a support and a Lewis base wherein n is equal to one or two, T is equal to R.sub.3 DCH.sub.2, and wherein D is selected from the group consisting of Si, Ge or Sn, R is methyl or ethyl, and R' is selected from the group consisting of C.sub.1 to C.sub.8 primary alkyl or aralkyl groups including unhindered branched groups and M is selected from the group consisting of aluminum, gallium, or indium. The improved catalyst system provides both increased polymerization activity and polymers having a high degree of isotactic stereoregularity as well as lower catalyst residue.

REFERENCES:
patent: 3293228 (1966-12-01), Takashi et al.
patent: 3969332 (1976-07-01), Gloriod et al.

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