Polyurethanes and method for making polyurethanes

US12071505B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Kshitish A. Patankar · Midland, US
• Arjun Raghuraman · Pearland, US
• Thomas P. Willumstad · Lake Jackson, US
• Mark F. Sonnenschein · Midland, US
• Jody Henning · Midland, US
• Heather A. Spinney · Midland, US
• David R. Wilson · Midland, US
• Sukrit Mukhopadhyay · Midland, US
• William H. Heath · Lake Jackson, US

Key dates

• Filing date: Sep 17, 2019
• Grant date: Aug 27, 2024
• Expiry date: Jul 22, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2190/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyurethanes are made in a one-shot process from one or more polyols having a hydroxyl equivalent weight of at least 350, wherein at least 50% of the weight of iii) is a hydroxyl-containing polymer of propylene oxide, the hydroxyl-containing polymer of propylene oxide having a hydroxyl equivalent weight of at least 350, an average of 1.8 to 3 hydroxyl groups per molecule of which hydroxyl groups 40 to 70% are primary hydroxyl groups, an oxyethylene content of no greater than 10% by weight based on the weight of the polymer and a polydispersity of 1.175 or less. The polyurethanes exhibit excellent mechanical properties, are highly hygroscopic and cured rapidly.