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

US5686534A · 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: Sep 15, 1994
• Grant date: Nov 11, 1997
• Expiry date: Sep 15, 2014

Classification

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

Abstract

An initiation system for the anionic polymerization of (meth)acrylic monomers and, optionally, nonacrylic vinyl monomers is disclosed. The initiation system comprises (1) a functional initiator and (2) an alkali metal alcoholate having the formula R'OM', in which M' is an alkali metal and R' is a group R.sup.1 (OR.sup.2).sub.m where R.sup.1 is a C.sub.1 -C.sub.6 alkyl or arylalkyl radical, R.sup.2 is a C.sub.2 -C.sub.4 alkylene radical and m is equal to 1, 2 or 3. The initiation system is applied to the formation of (meth)acrylic homopolymers and block copolymers of (meth)acrylic monomers and, optionally, nonacrylic vinyl comonomers.