Method for making heterophasic polymer compositions
AssigneeMilliken & Company
InventorsJoseph J. Peterson, Scott R. Trenor
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Abstract
A method for modifying a heterophasic polymer composition comprises the steps of providing a compatibilizing agent, providing a heterophasic polymer composition comprising a propylene polymer phase and an ethylene polymer phase, mixing the compatibilizing agent and the heterophasic polymer composition, and generating free radicals in the propylene phase and the ethylene phase. At least a portion of the compatibilizing agent then reacts with free radicals in both the propylene polymer phase and the ethylene polymer phase to form a bond with a propylene polymer in the propylene polymer phase and a bond with an ethylene polymer in the ethylene polymer phase.
Claims10
A method for modifying a heterophasic polymer composition, the method comprising the steps of:
- (a) providing a compatibilizing agent, the compatibilizing agent comprising two or more functional groups capable of reacting with a free radical in a radical addition reaction;
- (b) providing a heterophasic polymer composition, the heterophasic polymer composition comprising a propylene polymer phase and an ethylene polymer phase, and the heterophasic polymer composition having a number-average sequence length of ethylene runs of 3 or more;
- (c) mixing the compatibilizing agent and the heterophasic polymer composition;
- and
- (d) generating free radicals in the propylene polymer phase and the ethylene polymer phase, whereby at least a portion of the compatibilizing agent reacts with free radicals in both the propylene polymer phase and the ethylene polymer phase to form a bond with a propylene polymer in the propylene polymer phase and a bond with an ethylene polymer in the ethylene polymer phase.
Dependencies are inferred from the claim text.