Patent ID: 7544401

Claim:
An ink jet recording media system that comprises a support and one or more ink jet ink receptive coating layers thereon, wherein at least one ink receptive coating layer comprises a zwitterionic polymer or oligomer, where the zwitterionic polymer or oligomer is a copolymer or cooligomer of acrylamide and at least one zwitterionic monomer, in which the zwitterionic monomers are selected from the formulae wherein L + is a group of formula L − is a group of formula Z + is —N + R 5 R 6 R 7 ; R 1 and R 8 are independently hydrogen or methyl; W + is —S + R 3 — or —N + R 2 R 3 —; Y 1 and Y 2 are independently selected from —O— or —NR 2 ; R 2 , R 3 , R 4 , R 5 , R 6 and R 7 are independently selected from hydrogen and straight or branched chain alkyl of 1 to 4 carbon atoms; m is 2 or 3; and n is 1-5; and where the polymer or oligomer optionally further comprises nonionic monomers selected from the group consisting of methacrylamide, N-methylacrylamide, N,N-dimethyl(meth)acrylamide, N-isopropyl(meth)acrylamide, N-(2-hydroxypropyl)methacrylamide, N-methylolacrylamide, N-vinylformamide, N-vinylacetamide, N-vinyl-N-methylacetamide, poly(ethylene glycol)(meth)acrylate, poly(ethylene glycol)monomethyl ether mono(meth)acrylate, N-vinyl-2-pyrrolidone, glycerol mono((meth)acrylate), 2-hydroxyethyl(meth)acrylate, vinyl methylsulfone, vinyl acetate, diacetone acrylamide, acrylate and methacrylate esters and acids and associative monomers.