Process for preparing polyolefin fluff using metallocene catalys

Details Process for preparing polyolefin fluff using metallocene catalys Process for preparing polyolefin fluff using metallocene catalys

1990-11-05

1994-02-01

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526 95, 526114, 526226, 526351, C08F 202

Patent

active

052833003

ABSTRACT:
Olefin polymers and copolymers having controlled morphology are prepared by bulk or slurry polymerization using metallocene catalysts in the presence of an alumoxane cocatalyst. Prepolymerization at a temperature of -10.degree. C. to +35.degree. C. during 1.5 to 3.5 minutes is immediately followed by polymerization at 55.degree.-70.degree. C.
The fluff has a narrow grain size distribution, a smooth surface and a high bulk density.

REFERENCES:
patent: 4767735 (1988-08-01), Ewen et al.
patent: 4871705 (1989-10-01), Hoel
patent: 4892851 (1990-01-01), Ewen et al.

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