Propylene-based polymer compositions with improved crystallization

US10808112B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Yi Ping Ni · Shanghai, CN
• Thomas Cugnon · Колхозный переулок, BE
• Xin Chen · Shanghai, CN
• Yinjie Zhang · Shanghai, CN
• Saifudin M. Abubakar · Shanghai, CN
• Willy J. J. Leysen · São Paulo, BR
• Tie Y. Ye · Shanghai, CN
• Yijin Zhang · Shanghai, CN

Key dates

• Filing date: Nov 2, 2018
• Grant date: Oct 20, 2020
• Expiry date: Dec 29, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2207/066
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is related to a composition with about 80 wt % to about 95 wt % of a polymer blend, wherein the polymer blend comprises (a) about 3 wt % to about 25 wt % of a first propylene-based elastomer based on the polymer blend, and (b) about 75 wt % to about 97 wt % of a second propylene-based elastomer based on the polymer blend; and about 5 wt % to about 20 wt % of an ethylene-based polymer; wherein the first propylene-based elastomer and the second propylene-based elastomer each comprise the following: propylene and from about 2 to about 25 wt % units derived from one or more C2 or C4-C12 alpha-olefins; triad tacticity greater than about 90% and a heat of fusion less than about 75 J; and wherein the first propylene-based elastomer is different from the second propylene-based elastomer.