Asahi Kasei Plastics North America, Inc.

Sameer G Mehta

Laura Therese Shereda

Vaibhav Vishnu Apte

Michael James Balow

Katherine M Shipley

A polymeric composition is a blend of one or more heterophasic copolymers of propylene and ethylene produced by a multistep polymerization, wherein the heterophasic copolymers comprise a low crystalline matrix component and a soft amorphous elastomeric component, in which both the matrix component and the soft amorphous elastomeric component contain greater than 55% by weight propylene; one or more additional elastomeric components selected from the group of an ethylene/&#x3b1;-olefin C-Ccopolymer with a total ethylene concentration of greater than or equal to 65% by weight; and a propylene/&#x3b1;-olefin C, C-Ccopolymer with a total propylene concentration of greater than or equal to 65% by weight; 5-65% by weight of the total composition of one or more inorganic or organic reinforcement materials; and 0.01-4% by weight of the total composition of a maleic anhydride grafted polypropylene compatibilizer or coupling agent. The polymeric composition has a low crystallinity of less than 30 J/gram measured by DSC. The total elastomer content of the polymeric composition is greater than 50% by weight, and the overall polymeric composition has an ethylene concentration of greater than 10% by weight.

Polypropylene compounds with enhanced haptics

The present invention relates to polypropylene compositions with a balance of high strength, good clarity, excellent stress whitening resistance, and excellent impact properties&#x2014;especially at low temperatures&#x2014;for use in demanding plastics applications. Blends consist of both homopolymer and random copolymer polypropylene fractions, as well as propylene-ethylene elastomers and styrenic based elastomers. The invention also covers molded articles made from these blends.

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Novi, MI, United States of America

Sameer G Mehta