Blends of polypropylene impact copolymer with other polymers
AssigneeFina Technology, Inc.
InventorsJuan Aguirre, Mike McLeod, Rodolfo Mier, Nguong van Nguyen
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AssigneeFina Technology, Inc.
InventorsJuan Aguirre, Mike McLeod, Rodolfo Mier, Nguong van Nguyen
Estimating the term…
It has been discovered that the properties of sheet or film materials of broad molecular weight distribution ethylene/propylene rubber impact-modified heterophasic copolymer (ICP) can be improved by blending the ICP with a second polyolefin. The second polyolefin may be a syndiotactic polypropylene (sPP), a random copolymer (RCP) of propylene and comonomer (e.g. ethylene and/or butene) made using a Ziegler-Natta or metallocene catalyst, medium density polyethylene (MDPE), linear low density polyethylene (LLDPE), or low crystalline copolymer of propylene/α-olefin. Improvements include, but are not necessarily limited to, reduced motor amps, lower secant modulus, increased dart drop strength, increased gloss, reduced haze, increased elongation to yield, elimination of stress whitening, improved puncture resistance, and decreased seal initiation temperature. This sheet of film materials may be co-extruded with other resins or laminated with other materials after extrusion.
-33. (canceled)
A process for making a blown film comprising:
A process for making a multilayer film or sheet material comprising co-extruding two resins together where one of the resins is a resin blend comprising:
A process for making a laminated article having at least two layers comprising:
Dependencies are inferred from the claim text.