Cationically electrodepositable finely divided gelled polymer and process for producing same

Abstract

A cationically electrodepositable finely divided gelled polymer obtained by, in the first step, emulsion polymerizing (A) a monomer component comprising (a) a polymerizable unsaturated vinylsilane monomer containing a vinylic double bond and a hydrolyzable alkoxysilane group, (b) a polymerizable monomer having at least two radically polymerizable unsaturated groups in a molecule, (c) a polymerizable unsaturated monomer having a vinylic double bond and a hydroxyl group, and (d) another polymerizable unsaturated monomer using a cationically reactive emulsifying agent having an allyl group in a molecule; and in the second step, emulsion polymerizing a monomer component (B) comprising (e) a blocked monoisocyanate or polyisocyanate in which at least one isocyanate group in a molecule is blocked with a radically polymerizable monohydroxy compound, (f) a polymerizable unsaturated monomer having a vinylic double bond and a hydroxyl group, and (g) another polymerizable unsaturated monomer in the presence of an aqueous finely divided gelled polymer obtained in the first step, said polymer having a core-sheath structure in which the polymerized product of the monomer component (A) is the core and the polymerized product of the monomer component (B) is the sheath, and process for producing same.

Dependencies are inferred from the claim text.