Propylene-ethylene copolymers and adhesives containing propylene-ethylene copolymers

US12152136B2 · kind B2 · utility

Assignee

• Synthomer Adhesive Technologies LLC · US

Inventors

• Jianning Liu · Johnson City, US
• Marc Stacey Somers · Kilgore, US
• Bennett H. Novak · Longview, US
• Raymond Prescott Cottle · Longview, US
• Bee Kim Liew · Katy, US
• Andrea Gail Hagood · Kingsport, US
• Terri Roxanne Carvagno · Church Hill, US

Key dates

• Filing date: Jul 26, 2022
• Grant date: Nov 26, 2024
• Expiry date: Jul 26, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/03
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Propylene-ethylene copolymers are provided that exhibit superior tensile strength and mechanical properties due to their specific propylene and ethylene content, triad tacticity, viscosity, and crystallinity. Moreover, we have discovered that certain processing conditions, such as polymerization temperature and external donor to catalyst ratios, can facilitate the production of the high tensile strength propylene-ethylene copolymers described herein. Furthermore, the high tensile strength propylene-ethylene copolymers may be used to produce a variety of hot melt adhesives, such as those for hygiene applications, woodworking applications, lamination applications, and packaging applications, which exhibit unique and superior mechanical properties.