Polyester polyols from thermoplastic polyesters and dimer fatty acids

US10611879B2 · kind B2 · utility

Assignee

• RESINATE MATERIALS GROUP, INC. · US

Inventors

• Shakti L. Mukerjee · Canton, US
• Rick Tabor · Plymouth, US
• Adam W. Emerson · Belleville, US
• Kevin Anthony Rogers · Farmington, US
• Eric David Vrabel · Ferndale, US
• Matthew T. Brown · South Lyon, US
• Matthew J. Beatty · Ann Arbor, US
• Jack Rogers Kovsky · Livonia, US
• Michael D. Kellerman · Chicago, US
• Michael Robert Christy · Howell, US

Key dates

• Filing date: Apr 15, 2019
• Grant date: Apr 7, 2020
• Expiry date: Apr 15, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyester polyols made from thermoplastic polyesters are disclosed. The polyols can be made by heating a thermoplastic polyester such as virgin PET, recycled PET, or mixtures thereof, with a glycol to give a digested intermediate, which is then condensed with a dimer fatty acid to give the polyol. The invention includes a polyester polyol comprising recurring units of a glycol-digested thermoplastic polyester and a dimer fatty acid. The polyester polyol can also be made in a single step by reacting the thermoplastic polyester, glycol, and dimer acid under conditions effective to produce the polyol. High-recycle-content polyols having desirable properties and attributes for formulating polyurethane products, including aqueous polyurethane dispersions, can be made. The polyols provide a sustainable alternative to bio- or petrochemical-based polyols.