Process for the production of polymers having reactive end groups

US4611037A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rudiger Musch · Bensberg, DE
• Oskar Nuyken · Munich, DE
• Stephen Pask · Dormagen, DE
• Axel Vischer · Garching bei München, DE
• Michael Marcus Walter · Tonbridge, GB

Key dates

• Filing date: Aug 6, 1985
• Grant date: Sep 9, 1986
• Expiry date: Aug 6, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F110/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An improved process for the production of polymers having halogen end groups from cationically polymerizable monomers, the monomer being polymerized in an inert solvent at a temperature of from +10.degree. to -130.degree. C. using a catalyst system consisting of a metal halide and an organic halide, compounds corresponding to the following general formula being used as organic halides: ##STR1## wherein X represents a halogen atom; PA0 R.sub.1, R.sub.2, R.sub.3, represent C.sub.5 -C.sub.10 cycloalkyl, or a C.sub.1 -C.sub.20 straight- or branched-chain alkyl or ##STR2## wherein R.sub.4 and R.sub.5 represent C.sub.5 -C.sub.10 -cycloalkyl or a C.sub.1 -C.sub.20 straight- or branched-chain alkyl; PA0 and the organic halide has at least 5 carbon atoms and at most 50 carbon atoms and is in a concentration of from 10.sup.-1 to 10.sup.-6 mols per mol of monomer, while BX.sub.3, SnX.sub.4, TiX.sub.4, SbX.sub.5 or FeX.sub.3, wherein X is fluorine, chlorine, bromine or iodine, is used as metal halide in from 2 to 500 times molar excess, based on the organic halide.