Virtually telechelic silyl-functional polyisobutylene

US6469115B1 · kind B1 · utility

Assignees

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

Inventors

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

Key dates

• Filing date: May 16, 2000
• Grant date: Oct 22, 2002
• Expiry date: May 16, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F210/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for preparing a moisture-curable, virtually telechelic, silyl-functional polyisobutylene is disclosed, said method comprising reacting, in the presence of a Lewis acid,(A) isobutylene;(B) an initiator of the formula (C) a styryl comonomer of the formula 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 independently selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having 6 to 10 carbon atoms, R′″ is a divalent non-aromatic hydrocarbon group having 2 to 6 carbon atoms, X is independently a halogen group, Y is halogen and n is independently 1, 2 or 3.