Sulfonium initiators, process for production and use in cationic polymerizable compositions

US7947757B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• Thomas Klettke · Dießen, DE
• Cornelia B. Fuehrer · Wertach, DE
• Andrea Hailand · Mauerstetten, DE
• Markus Mikulla · Cham, DE

Key dates

• Filing date: Jul 27, 2006
• Grant date: May 24, 2011
• Expiry date: Feb 20, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G59/687
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to an initiator comprising at least one structural element characterized by the following formula (I) wherein X− is a non or low coordinating anion, R1, R2, R3, R4 are independently linear, cyclic or branched C1-C20 alkyl or alkylene groups, wherein one or more of the methylene groups contained in the alkyl or alkylene group can be substituted by —CO—, —CONH—, —CON(CH3)—, —S— and/or —O—, and wherein R1, R2, R3 and/or R4 can act as a bridging element connecting two or more structural elements. The invention is also related to a process of producing the initiator and to a curable composition comprising the initiator, a process for producing the curable composition a kit comprising a cationically curable composition and the inventive initiator and the use of the initiator or the curable composition comprising the initiator for various applications, especially in the dental field.