Methods for making polyfunctional organosiloxanes and compositions containing same

US11787908B2 · kind B2 · utility

Assignee

• Dow Silicones Corporation · US

Inventors

• Eric Joffre · Midland, US
• Nanguo Liu · Midland, US
• Gang Lu · Nanhu, CN
• Zhenbin Niu · Midland, US
• David Rich · Barry, GB

Key dates

• Filing date: Dec 4, 2019
• Grant date: Oct 17, 2023
• Expiry date: Jun 30, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/70
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polyfunctional organohydrogensiloxane is prepared using a boron containing Lewis acid as catalyst. The polyfunctional organohydrogensiloxane may be formulated into release coating compositions. Alternatively, the polyfunctional organohydrogensiloxane may be further functionalized with a curable group to form a clustered functional organosiloxane. The clustered functional organosiloxane may be formulated into thermal radical cure adhesive compositions.