US Patent Issued to W.R. Grace & Co.- Conn on May 12 for "Phthalate-free polypropylene homopolymer having high stiffness properties" (Maryland Inventor)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,136, issued on May 12, was assigned to W.R. Grace & Co.- Conn (Columbia, Md.).

"Phthalate-free polypropylene homopolymer having high stiffness properties" was invented by Zhiru Ma (Ellicott City, Md.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Phthalate-free polypropylene homopolymers and compositions incorporating the homopolymers are described. The phthalate-free polypropylene homopolymers exhibit high molecular weight as well as low XS content. Composition incorporating the phthalate-free polypropylene homopolymer can have relatively high stiffness properties. In addition, the polypropylene compositions can have good melt flow characteristics. ...