Imperial Chemical Industries Limited

Akzo Nobel Coatings International B.v.

Stuart Douglas Smith

Riaz Ahmad Choudhery

David John Dyer

Brian David Milligan

A process for producing an aqueous dispersion of at least two preformed polymers each at least partially modified by grafted addition polymers produced in a solution of the polymers, comprising the steps of i) providing a solution in organic carrier liquid of a first preformed polymer, consisting of diepoxy resin, and at least one other preformed polymer excluding polyesters ii) mixing the solution containing the polymers with ethylenically unsaturated monomers, said monomers comprising an effective amount of copolymerizable dispersing moiety iii) providing an effective amount of a grafting polymerization initiator iv) allowing or causing the monomers to polymerize and graft to at least some of the preformed polymers to form a solution of modified polymers v) optionally adding crosslinking agent to solution iv) vi) dispersing the solution of modified polymers, and optionally crosslinking agent, in aqueous medium to form a stable dispersion of particles.

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Walsall, United Kingdom

Stuart Douglas Smith