Thermoplastic vulcanizates and compositions therefrom

US11015008B2 · kind B2 · utility

Assignee

• ExxonMobil Chemical Patents Inc. · US

Inventors

• Sudhin Datta · Houston, US
• Andy H. Tsou · Houston, US
• Ron Walker · Pearland, US
• Krishnan Anantha Narayana Iyer · Manvel, US
• Rhutesh K. Shah · Katy, US
• Hamidreza Khakdaman · Calgary, CA
• Sebastian Vasquez · Houston, US
• Feng Li · Beijing, CN

Key dates

• Filing date: Mar 18, 2019
• Grant date: May 25, 2021
• Expiry date: Mar 18, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2312/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Disclosed is the preparation of thermoplastic vulcanizates with reduced crosslinked rubber dispersion sizes and dispersity. The thermoplastic vulcanizates include a polypropylene matrix phase in which cross-linked rubber particles are dispersed. The thermoplastic vulcanizates include the reaction product of a mixture that includes at least 10 wt % of isotactic polypropylene at least 30 wt % of an amorphous propylene-ethylene-diene terpolymer containing at least 60 wt % propylene-derived units and less than or equal to 25 wt % of ethylene-derived units; at least 10 wt % of a diluent and at least 0.015 wt % of at least one curative. The mixture is preferably formed without adding an ethylene-propylene-diene terpolymer.