Cationic core-shell particles with acid-swellable shells

A cationic core-shell particle suitable for use in formulating ink jet receptive coatings comprising:

• (A) a polymeric core component, said core component comprising the free radical polymerization reaction product of a mixture comprising:
• (1) about 80.0% to about 99.5% by total weight of the mixture of a member selected from the group consisting of acrylic esters of alcohols containing from 1 to 22 carbon atoms, methacrylic esters of alcohols containing from 1 to 22 carbon atoms, styrene, substituted styrenes, acrylonitrile, methacrylonitrile, vinyl chloride, vinylidene chloride, vinyl ethers, vinyl esters, N-vinyl amides, acrylamides, methacrylamides, and combinations thereof;
• (2) about 0.5% to about 20.0% by total weight of the mixture of a member selected from the group consisting of ethylenically unsaturated monomers containing at least one quaternary ammonium group and combinations thereof;
• (3) about 0.5% to about 8.0% by total weight of the mixture of a surfactant about selected from the group consisting of nonionic surfactants, cationic surfactants, and combinations thereof;
• and
• (4) a catalytic amount of polymerization initiator;
• and
• (B) an acid-swellable polymeric shell component disposed generally about said core component, said shell component comprising the free radical polymerization reaction product of a mixture comprising:
• (1) about 5.0% to about 35.0% by total weight of the mixture of a member selected from the group consisting of amine-containing ethylenically unsaturated monomers and combinations thereof;
• (2) about 10.0% to about 80.0% by total weight of the mixture of a member selected from the group consisting of acrylic esters of alcohols containing from 1 to 22 carbon atoms, methacrylic esters of alcohols containing from 1 to 22 carbon atoms, styrene, substituted styrenes, acrylonitrile, methacrylonitrile, vinyl chloride, vinylidene chloride, vinyl ethers, vinyl esters, N-vinyl amides, acrylamide, N-alkyl-substituted acrylamides, methacrylamide, N-alkyl-substituted methacrylamides, and combinations thereof;
• (3) up to about 15.0% by total weight of the mixture of a member selected from the group consisting of ethylenically unsaturated monomers containing at least one quaternary ammonium group and combinations thereof;
• (4) up to about 8.0% by total weight of the mixture of a member selected from the group consisting of ethylenically unsaturated monomers containing at least one hydroxyl group and combinations thereof;
• (5) up to about 8.0% by total weight of the mixture of a member selected from the group consisting of N-hydroxymethylacrylamide, N-hydroxymethylmethacrylamide, N-alkoxymethylacrylamide, N-alkoxymethylmethacrylamide, and combinations thereof;
• (6) up to about 4.0% by total weight of the mixture of a chain transfer agent;
• (7) about 0.5% to about 8.0% by total weight of the mixture of a surfactant about selected from the group consisting of nonionic surfactants, cationic surfactants, and combinations thereof;
• and
• (8) a catalytic amount of polymerization initiator.