Living cationic polymers prepared from silyl-functional aromatic initiators

US6194597A · kind A · utility

Assignees

• Dow Corning Corporation · US
• University of Massachusetts · US

Inventors

• Rudolf Faust · Lexington, US
• Savvas Hadjikyriacou · Lowell, US
• Aroop Kumar Roy · Midland, US
• Toshio Suzuki · Chiba, JP

Key dates

• Filing date: Apr 15, 1999
• Grant date: Feb 27, 2001
• Expiry date: Apr 15, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F10/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid, PA1 (A) at least one cationically polymerizable monomer with PA1 (B) an initiator of the formula ##STR1## wherein R is selected from H or methyl group, R' is a divalent non-aromatic hydrocarbon group having, 1 to 6 carbon atoms, R" is selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having, 6 to 10 carbon atoms, X is halogen, Y is halogen and n is 1, 2 or 3.