Method and element for controlling release of a disinfectant from a substrate

• US 5,421,898 A
• Filed: 02/21/1992
• Issued: 06/06/1995
• Est. Priority Date: 02/21/1992
• Status: Expired due to Term

• Current Assignee: Reckitt Benckiser LLC (Reckitt Benckiser Group PLC)
• Original Assignee: Reckitt & Colman Inc. (Reckitt Benckiser Group PLC)
• Inventors: Cavanagh, James W.
• Primary Examiner(s): MCFARLANE, ANTHONY R
• Application Number:
  US07/838,977
• Time in Patent Office: 1,201 Days
• Field of Search: 427/286, 427/288, 427/389.9, 428/35.2, 428/35.5, 428/36.1, 428/264, 428/265, 428/290, 428/288, 252/91, 134/6, 134/7, 134/42
• US Class Current: 134/7
• CPC Class Codes: A01N 2300/00 Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48
• 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 33/12 Quaternary ammonium compounds
• CPC Class Codes: A61L 2/16 using chemical substances
• CPC Class Codes: C11D 17/049 Cleaning or scouring pads; Wipes
• CPC Class Codes: Y10T 442/2525 Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]

Abstract

This present invention provides an element for controlling release of a quaternary disinfectant in aqueous solutions comprising a substrate coated with the residue of an aqueous composition of a water soluble polymer and a quaternary ammonium disinfectant characterized in that the water soluble polymer has weight average molecular weight of 85,000 to 186,000 and a degree of hydrolysis of 87 to 89 percent.

Claims

1. An element for controlling the release of a quaternary disinfectant in aqueous solutions comprising a substrate coated with the residue of an aqueous composition of both a) a water soluble polymer and b) a quaternary ammonium disinfectant characterized in that the water soluble polymer has weight average molecular weight of 85,000 to 186,000 and a degree of hydrolysis of 87 to 89 percent.

2. An element according to claim 1 wherein the water soluble polymer has a weight average molecular weight of 124,000 to 186,000 and a degree of hydrolysis of 87 to 89 percent.

3. The element of claim 1 wherein the substrate is selected from woven or non-woven fabrics.

4. The element of claim 1 wherein the substrate is a film-forming water soluble polymer.

5. An element according to claim 3 wherein the substrate is in the form of a pouch, sponge or an abrasive scouring pad.

6. An element according to claim 1 or 2 in which the substrate is a fabric dot coated with the residue of an aqueous composition of a water soluble polymer and said quaternary ammonium desinfectant characterized in that the water soluble polymer has weight average molecular weight of 124,000 to 186,000.

7. A fabric pouch containing said element according to claim 3 or 4.

8. An element according to claim 6 or 2 in which the residue is coated on the substrate in the form of one more stripes.

9. The element of claim 1 or 2 wherein the polymer is polyvinyl alcohol, polyvinylpyrrolidone or poly(ethylene oxide).

10. The element of claim 1 or 2 wherein the disinfectant is alkyl dimethylbenzyl ammonium chloride and the polymer is polyvinyl alcohol.

11. The element of claim 1 or 2 wherein the polymer is poly(ethylene oxide) or polyvinylpyrrolidone.

12. The element of claim 1 or 2 wherein the disinfectant is alkyl dimethylbenzyl ammonium chloride and the polymer is polyvinyl alcohol and the ratio of polymer to disinfectant is from 10:

1 to 1;

5.

14. The element of claim 1 or 2 wherein the disinfectant is selected from the group consisting of alkyl dimethyl benzyl ammonium chloride and alkyl dimethyl ethylbenzyl ammonium chloride.

13. A method of making an element from which the release of disinfectants is controlled when said element is wetted comprising the steps of:

(a) providing a substrate and

(b) coating the substrate with a residue of an aqueous composition of a water soluble polymer and a quaternary disinfectant characterized in that the water soluble polymer has weight average weight average molecular weight of 85,000 to 186,000 and a degree of hydrolysis of 87 to 89 percent.

15. A method of disinfecting surfaces, comprising the steps of:

(a) providing a substrate comprising a disinfectant;

(b) controlling release of the disinfectant from the substrate by coating the substrate with a residue of an aqueous composition of a water soluble polymer and a quaternary disinfectant wherein the water soluble polymer has weight average molecular weight of 85,000 to 186,000, and a degree of hydrolysis of 87 to 89 percent and

(c) disinfecting the surface by treating with the coated substrate.