Process for polymerizing high melt index olefins and polymerizat

Details Process for polymerizing high melt index olefins and polymerizat Process for polymerizing high melt index olefins and polymerizat

1982-11-12

1985-01-29

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526106, 526132, 526134, 526352, C08F 424, C08F 1000

Patent

active

044966997

ABSTRACT:
A process is disclosed for polymerizing an olefin to provide a polyolefin of high melt index which comprises contacting the olefin with a catalyst system obtained by heat activating a supported organophosphoryl chromium compound obtained by the reaction of chromium trioxide with an organophosphorous compound having the formula: ##STR1## wherein R is alkyl, aralkyl, aryl, cycloalkyl, or hydrogen, but at least one R is other than hydrogen, and combining the heat activated supported material with a melt index increasing amount of at least one organoborane catalyst modifier having the formula: ##STR2## wherein m and n each is zero or 1, R.sub.1 and R.sub.2 are each a hydrocarbyl group of from 1 to 10 carbon atoms, or one of R.sub.1 and R.sub.2 is hydrogen, or together R.sub.1 and R.sub.2 constitute a hydrocarbyl group of from 2 to 10 carbon atoms.

REFERENCES:
patent: 3476724 (1969-11-01), Hogan et al.
patent: 3947433 (1976-03-01), Witt
patent: 3984351 (1976-10-01), Rekers et al.
patent: 3985676 (1976-10-01), Rekers et al.
patent: 4252926 (1981-02-01), Katzen et al.
U.S. Equivalent of Netherlands Reference.

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