Process for modifying the rheology of polyolefins

Details Process for modifying the rheology of polyolefins Process for modifying the rheology of polyolefins

1998-02-19

2000-06-20

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253339, C08F 850

Patent

active

060779144

ABSTRACT:
The molecular weight of a polyolefin such as polypropylene is reduced, as evidenced by lowered viscosity and increased melt flow rate, by treatment with an inorganic peroxygen selected from metal persulfates, ammonium persulfates, and any mixtures thereof. The treatment avoids or minimizes the color or odor attendant treatment with organic peroxygens and the toxic products of organic persulfate decomposition, and avoids the special handling required with organic peroxides.

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patent: 3887534 (1975-06-01), Baba et al.
patent: 4537922 (1985-08-01), Chang et al.
patent: 5530073 (1996-06-01), Schoenberg

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