Phosphine-catalyzed, michael addition-curable sulfur-containing polymer compositions

US10011751B2 · kind B2 · utility

Assignee

• PRC-DESOTO INTERNATIONAL, INC. · US

Inventors

• Lawrence G. Anderson · Washington, US
• Juexiao Cai · Santa Clarita, US
• Mark P. Bowman · New Kensington, US
• Renhe Lin · Santa Clarita, US

Key dates

• Filing date: Mar 4, 2016
• Grant date: Jul 3, 2018
• Expiry date: Nov 17, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J2481/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Compositions comprising Michael acceptor-terminated sulfur-containing prepolymers, thiol-terminated sulfur-containing prepolymers, and e phosphine catalysts useful in aerospace sealant applications are disclosed. The compositions exhibit extended pot life, cure rapidly following activation, and provide cured sealants having improved properties useful in aerospace sealant applications.