Polyolefin with improved processing properties
AssigneeE. I. Du Pont de Nemours and Company
InventorsJeff T. Fenton, Allan J. Lundeen, Mark P. Mack, Jean A. Merrick
Life of this patent
Estimating the term…
Abstract
Processing properties of polyethylene resins are improved while retaining original physical properties by incorporating less than 1.5 weight percent of high molecular weight, non-crystalline polyolefins into the polyolefin resins. The resulting compositions exhibit reduced melt viscosity at high shear rates while providing essentially unchanged finished physical properties of the polyethylene article.
Claims9
A method for improving the processing characteristics of extrudable, substantially crystalline polyolefin polymers and copolymers prepared from monomers containing from 2 to 10 carbon atoms, comprising incorporating into a said polymer or copolymer up to 1.5% by weight of a substantially non-crystalline hydrocarbon soluble homopolymer of a C.sub.8 -C.sub.30 monolefin monomer or copolymer thereof formed with monolefin monomers containing from 2 to 30 carbon atoms, said incorporated homopolymer or copolymer having an inherent viscosity of at least 6.0 deciliters per gram at a shear rate of 300.degree. sec.sup.-1 at 25.degree. C.
A resin compositon comprising from 98.5% to 99.9% by weight of an extrudable, substantially crystalline polyolefin homopolymer or copolymer formed from olefins containing from 2 to 30 carbon atoms, together with from about 0.1% to about 1.5% by weight of a substantially non-crystalline homopolymer of a C.sub.8 -C.sub.30 monolefin monomer or copolymer thereof having an inherent viscosity of at least 6.0 deciliters per gram and formed with monolefin monomers containing from 2 to 30 carbon atoms.
Dependencies are inferred from the claim text.