The Dow Chemical Company

Klye G Kummer

Rajen M Patel

Pak-Wing Steve Chum

Pradeep Jain

Deepak R Parikh

Ronald P Markovich

Thomas J McKeand

Timothy E Clayfield

Wasif Ahmed Khan

Polymer mixtures are disclosed which comprise at least one homogeneously branched ethylene polymer (A) and at least one ethylene polymer (B) having a crystallinity which is at least 7% greater than the crystallinity of polymer (A) with certain provisos. A process for making a molded article using the disclosed polymer mixtures is disclosed as well as films, film layers, coatings and molded articles formed from those mixtures. These mixtures have several advantages over polymer compositions of the prior art, including improved properties at elevated temperatures such as improved softening point under load, improved hardness, improved toughness, improved 100% modulus of elasticity, improved compression set, improved ability to prevent oil bleed out at lower temperatures when the mixture contains oil and reduced injection molding cycle time. The mixtures retain their performance advantages even when substantial amounts of additives such as oil and filler are incorporated into the mixture. The mixtures may also be crosslinked after they are formed into the shape of an article to form vulcanized elastomeric products. The polymer mixtures have utility in a variety of applications.

Polyolefin elastomer blends exhibiting improved properties

Growing community of inventors

Lake Jackson, TX, United States of America

Klye G Kummer