Silicone-polyether copolymer, method of preparing same, and sealant comprising same

US10676568B2 · kind B2 · utility

Assignees

• DOW GLOBAL TECHNOLOGIES LLC · US
• Dow Silicones Corporation · US

Inventors

• Martin Grasmann · Midland, US
• David Hagan · Midland, US
• Brian Harkness · Midland, US
• William H. Heath · Lake Jackson, US
• Stephen Michael Hlinka, II · Midland, US
• Eric Jude Joffre · Midland, US
• William Johnson · Newark, US
• Bindu Krishnan · Lake Jackson, US
• Jeanette Young · Midland, US
• Bizhong Zhu · Midland, US

Key dates

• Filing date: Jun 26, 2018
• Grant date: Jun 9, 2020
• Expiry date: Jun 26, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2200/0685
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A silicone-polyether copolymer has the formula Xg—Y, where each X is an independently selected silicone moiety having a particular structure, Y is a linear or branched polyether moiety, and subscript g is on average more than 1. A method of preparing the silicone-polyether copolymer comprising reacting a polyether compound and an organosilicon compound in the presence of a hydrosilylation-reaction catalyst. A sealant is also disclosed, the sealant comprising the silicone-polyether copolymer and a condensation-reaction catalyst.