Zwitterionic copolymers, coating compositions, articles, and coating methods

Abstract

Zwitterionic copolymers, coating compositions (e.g., aqueous coating compositions and articles containing such copolymers, and methods of coating such coating compositions; wherein the copolymer includes: (a) first monomeric units derived from monomers of Formula (I) CH═CR—(CO)—X—R—[-Q-R—]—Y (I) or salts thereof, wherein: Ris hydrogen or methyl; X is oxy or —NH—; Ris an alkylene optionally including catenary oxygen; Ris an alkylene; Q is —(CO)O—, —NR—(CO)—NR—, or —(CO)—NR—; Ris hydrogen or alkyl; n is equal to 0 or 1; and Y is phosphonic acid, phosphonate, phosphoric acid, or phosphate; and (b) second monomeric units derived from monomers of Formula (II) CH═CR—(CO)—X—R—[-Q-R—]—[NRR]+—R—Z— (II) wherein: Ris hydrogen or methyl; X is oxy or —NH—; Ris alkylene optionally including catenary oxygen; Ris alkylene; Q is —(CO)O—, —NR—(CO)—NR—, or —(CO)—NR4-; Ris hydrogen or alkyl; n is equal to 0 or 1; Rand Rare each independently an alkyl, aryl, or a combination thereof, or Rand Rboth combine with the nitrogen to which they are both attached to form a heterocyclic ring having 3 to 7 ring members; Ris alkylene; and Z″ is carboxylate or sulfonate.CH═CR—(CO)—X—R—[-Q-R-]—Y  (I)CH═CR—(CO)—X—R—[-Q-R—]—[NRR]—R—Z  (II)