Antimicrobial articles and compounds therefor

• US 10,405,553 B1
• Filed: 03/08/2017
• Issued: 09/10/2019
• Est. Priority Date: 04/07/2015
• Status: Active Grant

• Current Assignee: Novalent Limited
• Original Assignee: Indusco, Ltd.
• Inventors: Mason, Joseph E., Neigel, Dennis Victor
• Primary Examiner(s): Jarrell, Noble E
• Assistant Examiner(s): Kenyon, John S
• Application Number:
  US15/453,108
• Time in Patent Office: 916 Days
• CPC Class Codes: A01N 25/04 Dispersions, emulsions, suspoemulsions, suspension concentrates or gels foams A01N25/16
• CPC Class Codes: A01N 25/08 containing solids as carriers or diluents
• CPC Class Codes: A01N 25/10 Macromolecular compounds
• CPC Class Codes: A01N 25/22 containing ingredients stabilising the active ingredients
• CPC Class Codes: A01N 25/34 Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
• CPC Class Codes: A01N 27/00 Biocides, pest repellants or attractants, or plant growth regulators containing hydrocarbons
• CPC Class Codes: A01N 33/12 Quaternary ammonium compounds
• CPC Class Codes: A01N 55/00 Biocides, pest repellants or attractants, or plant growth regulators, containing organic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen and sulfur containing organo-phosphorus compounds A01N57/00
• CPC Class Codes: A01N 65/00 Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof containing compounds of determined constitution A01N27/00 - A01N59/00
• CPC Class Codes: A01N 65/06 Coniferophyta [gymnosperms], e.g. cypress
• CPC Class Codes: A01N 65/22 Lamiaceae or Labiatae [Mint family], e.g. thyme, rosemary, skullcap, selfheal, lavender, perilla, pennyroyal, peppermint or spearmint
• CPC Class Codes: A01N 65/28 Myrtaceae [Myrtle family], e.g. teatree or clove
• CPC Class Codes: A01N 65/36 Rutaceae [Rue family], e.g. lime, orange, lemon, corktree or pricklyash
• CPC Class Codes: C09D 5/14 Paints containing biocides, e.g. fungicides, insecticides or pesticides C09D5/16 takes precedence

Abstract

Antimicrobial treated articles and compounds. The article includes a substrate and an antimicrobial mixture of an effective amount of at least one antimicrobial silanol quaternary ammonium compound, at least one essential oil and the balance water. In one embodiment, the antimicrobial mixture is forming in a reaction medium for mixing the at least one antimicrobial silanol quaternary ammonium compound and the at least one essential oil together prior to treating the substrate.

Claims

1. A method of stabilizing an aqueous solution of SQAC from premature polymerization comprising:

mixing an anhydrous SQAC defined as 3-(trimethoxysilyl) propyl-N-octadecyl-N,N-dimethyl ammonium chloride and an essential oil selected from the group consisting of grapefruit, lemon, lime, tangerine, orange, and mixtures thereof, to form a mixture,

diluting the mixture to a desired aqueous concentration with demineralized water, and

producing a stable and clear oil-in-water microemulsion that provides long-term stabilization from unwanted polymerization.

2. The method of claim 1 wherein the step of diluting the mixture with demineralized water further comprises diluting the mixture with a volume of water sufficient to produce an oil-in-water microemulsion containing six to ten percent (6-10%) by weight anhydrous SQAC.

3. The method of claim 1 wherein the step of diluting the mixture with demineralized water further comprises diluting the mixture with a volume of water sufficient to produce an oil-in-water microemulsion containing a tenth to six percent (0.1-6.0%) SQAC by weight.

4. The method of claim 1 wherein the step of mixing SQAC with the essential oil further includes defining a weight of the essential oil as five to forty percent (5-40%) by weight when compared to a weight of SQAC included in the mixture.

5. The method of claim 1 wherein the step of mixing SQAC with the essential oil further includes defining a weight of the essential oil as twenty-five to thirty-five percent (25-35%) by weight when compared to a weight (wt/wt) of SQAC present in the mixture.

6. The method of claim 1 wherein the step of producing an oil-in-water microemulsion further comprises producing a stable and clear oil-in-water microemulsion with six percent (6%) SQAC by weight and one and four fifths percent (1.8%) the essential oil by weight, that provides long-term stabilization from unwanted polymerization.

7. The method of claim 6 wherein long-term stabilization is defined as three years at twenty-five degrees Centigrade (25°

C.) without viscosity increase or precipitation.