18663194. Dual Catalyst System for Producing LLDPE and MDPE Copolymers with Long Chain Branching for Film Applications simplified abstract (Chevron Phillips Chemical Company LP)

Dual Catalyst System for Producing LLDPE and MDPE Copolymers with Long Chain Branching for Film Applications

Organization Name

Chevron Phillips Chemical Company LP

Inventor(s)

Errun Ding of Mason OH (US)

Chung Ching Tso of Bartlesville OK (US)

Max P. Mcdaniel of Bartlesville OK (US)

Ashish M. Sukhadia of Bartlesville OK (US)

Youlu Yu of Bartlesville OK (US)

Randall S. Muninger of Dewey OK (US)

Aaron M. Osborn of Bartlesville OK (US)

Christopher E. Wittner of Bartlesville OK (US)

Dual Catalyst System for Producing LLDPE and MDPE Copolymers with Long Chain Branching for Film Applications - A simplified explanation of the abstract

This abstract first appeared for US patent application 18663194 titled 'Dual Catalyst System for Producing LLDPE and MDPE Copolymers with Long Chain Branching for Film Applications

The patent application describes ethylene-based polymers with specific characteristics for use in blown films and other manufacturing processes. These polymers have a low melt index, a density range, a CY-a parameter, a controlled number of long chain branches, and a specific ratio at an extensional rate to maintain melt strength and bubble stability.

• Polymers have a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm, and a CY-a parameter at 190°C from 0.2 to 0.6%.
• Average number of long chain branches per 1,000,000 total carbon atoms is less than 5 in a molecular weight range of 500,000 to 2,000,000 g/mol.
• Maximum ratio of η/3η at an extensional rate of 0.03 sec in a range from 3 to 15.
• Polymers have no long chain branching in the high molecular weight fraction but significant long chain branching in the lower molecular weight fraction.
• Produced using a dual catalyst system containing specific metallocene compounds.

Potential Applications: - Blown film manufacturing - Packaging materials - Industrial applications requiring high melt strength

Problems Solved: - Maintaining melt strength and bubble stability in manufacturing processes - Controlling long chain branching for specific applications

Benefits: - Improved fabrication of blown films - Enhanced polymer properties for various manufacturing needs

Commercial Applications: - Enhanced materials for packaging industry - Improved industrial materials for specific applications

Questions about Ethylene-based Polymers: 1. How do these polymers compare to traditional materials used in blown film manufacturing? 2. What are the specific advantages of the dual catalyst system used in producing these polymers?

Frequently Updated Research: - Stay updated on advancements in metallocene catalyst technology for polymer production.

Original Abstract Submitted

Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 15 g/10 min, a density from 0.91 to 0.945 g/cm, a CY-a parameter at 190° C. from 0.2 to 0.6, an average number of long chain branches per 1,000,000 total carbon atoms of the polymer in a molecular weight range of 500,000 to 2,000,000 g/mol of less than 5, and a maximum ratio of η/3η at an extensional rate of 0.03 secin a range from 3 to 15. The ethylene polymers have substantially no long chain branching in the high molecular weight fraction of the polymer, but instead have significant long chain branching in the lower molecular weight fraction, such that polymer melt strength and bubble stability are maintained for the fabrication of blown films and other articles of manufacture. These ethylene polymers can be produced using a dual catalyst system containing a single atom bridged metallocene compound with an indenyl group and a cyclopentadienyl group, and an unbridged hafnium metallocene compound with two cyclopentadienyl groups.