Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1984-07-27
1985-07-09
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526106, 526120, C08F 406, C08F 472
Patent
active
045283389
ABSTRACT:
A catalyst system suitable for olefin polymerization comprising a mixed phosphate base made up of 75-99 mole percent aluminum phosphate and 1 to 25 mole percent of a phosphate of at least one other metal selected from gallium, yttrium, zirconium, lanthanum, neodymium and thorium in conjunction with an organoboron cocatalyst. The resulting catalyst system is capable of giving ethylene polymer having relatively low melt index and at the same time exhibits great sensitivity to molecular weight control agents so as to enable the production of a broad spectrum of polymers so far as melt index is concerned from a single catalyst system.
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Johnson Marvin M.
McDaniel Max P.
Babajko S.
Michl Paul R.
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