Method to reactor-fill polyolefins by employing a sticky prepoly

Details Method to reactor-fill polyolefins by employing a sticky prepoly Method to reactor-fill polyolefins by employing a sticky prepoly

1993-08-30

1995-05-02

Morgan, Kriellion S.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524730, 524786, 524700, 526119, 523129, C08K 505, C08K 322, C08K 334, C08K 304

Patent

active

054120250

ABSTRACT:
The present invention relates to a process to in-situ reactor-fill polyolefins. More specifically, the instant invention provides a process to reactor-fill polyolefins comprising the steps of (a) adding a sufficient amount of alpha-olefin to a filler prior to using the filler for in-situ polymerization; (b) prepolymerizing the mixture of step (a) by contacting the treated filler in random order of no specific sequence with a high activity polymerization catalyst, a cocatalyst, and, if necessary a cocatalyst modifier; and (c) adding an alpha-olefin under olefin polymerization reaction conditions to the reaction product of step (b) to form a reactor-filled composite. The prepolymerization step results in the formation of a sticky prepolymer on the surface and in the pores of the filler.
The present invention further relates to reactor-filled polyolefin composites obtained from the process of the present invention. The reactor-filled polyolefin composites produced by the instant invention are characterized as containing low levels of fines and having a relatively uniform distribution of filler material dispensed throughout the composite matrix.

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