Dispersible antimicrobial complex and coatings therefrom
AssigneePoly Group LLC
InventorsThomas E. Hopkins, Craig A. Kalmer
Life of this patent
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Abstract
Disclosed are latexes, suspensions, and colloids having a cationic antimicrobial compound complexed with an anionic surfactant. The surfactant may have greater affinity for the antimicrobial compound than other anionic surfactants and other anions in the latex, suspension, or colloid that contribute to disperse phase stability to prevent disrupting the dispersions. Dispersions containing the antimicrobial compound may therefore have a shelf life comparable to dispersions that are otherwise identical but lack the cationic antimicrobial compound and its complexed anionic surfactant. Coatings made with the complexes can exhibit essentially undiminished antimicrobial activity.
Claims18
A composition comprising a mixture of:
- a) a carrier liquid;
- b) a first complex of a cationic antimicrobial compound and a first anionic surfactant dispersed in the carrier liquid;
- c) a second complex of a second anionic surfactant and at least one member selected from particles and immiscible droplets dispersed in the carrier liquid;
- and
- d) said mixture is a colloid, a suspension, or a latex;
- and wherein
- e) the cationic antimicrobial compound comprises a copolymer of a quaternized nitrogen-containing monomer and a hydrophilic comonomer, wherein
- f) the quaternized nitrogen-containing monomer comprises an alkyl-quaternized 4-vinyl pyridine and the hydrophilic comonomer comprises poly(ethylene glycol) methyl ether methacrylate.
Dependencies are inferred from the claim text.