Initiation system for the anionic polymerization of (meth)acrylic monomers

US5677387A · kind A · utility

Assignee

• Elf Atochem S.A. · FR

Inventors

• Philippe Bayard · Stavelot, BE
• Roger Fayt · Neupré, BE
• Philippe Teyssie · Flémalle, BE
• Sunil K. Varshney · Grivegnée, BE
• Bruno Vuillemin · Billère, FR
• Philippe Heim · Pau, FR

Key dates

• Filing date: Jun 7, 1995
• Grant date: Oct 14, 1997
• Expiry date: Jun 7, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F297/026
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A diblock copolymer obtained by polymerizing acrylic, methacrylic or nonacrylic vinyl monomers in the presence of a polymerization initiating amount of an initiation system including (1) at least one functional initiator and (2) an alkali metal alcoholate. The alcoholate has the formula: EQU R'OM' in which M' is an alkali metal and R' has the formula: EQU R.sup.1 (OR.sup.2).sub.m in which R.sup.1 is a linear or branched alkyl radical containing from 1 to 6 carbon atoms or an arylalkyl radical, R.sup.2 is a linear or branched alkylene radical containing from 2 to 4 carbon atoms, and m is the integer 1, 2 or 3.