Wet wipes containing hydroxy acetophenone and cocamidopropyl PG dimonium chloride phosphate

Abstract

A cleaning composition including a preservative formulation having hydroxy acetophenone and a phospholipid complex is disclosed. The cleaning composition can be loaded on a cleaning wipe and used for personal care. The hydroxyacetophenone provides a preservative booster to the preservative system for the cleaning composition containing a phospholipid complex, such as cocamidopropyl PG-dimonium chloride phosphate, which has some limited independent preservation activity, depending on the level in the final formulation.

Claims

1. A preservative formulation for a wet wipe cleaning composition, the preservative formulation comprising: a first preservative compound formed of a hydroxy acetophenone; and a second preservative compound formed of an organic phospholipid, wherein the organic phospholipid is an alkyl PG-dimonium chloride phosphate.

2. A preservative formulation according to claim 1 wherein the alkyl PG-dimonium chloride phosphate has a fatty acid chain length between 8 and 20 carbons.

3. A preservative formulation according to claim 2 wherein the alkyl PG-dimonium chloride phosphate is cocamidopropyl PG-dimonium chloride phosphate.

4. A preservative formulation according to claim 2 wherein the alkyl PG-dimonium chloride phosphate is selected from the group consisting of cocamidopropyl PG-dimonium chloride phosphate, sodium coco PG-dimonium chloride phosphate, stearamidopropyl PG-dimonium chloride phosphate, myristalamidopropyl PG-dimonium chloride phosphate, sodium borageamidopropyl PG-dimonium chloride phosphate, linoleamidopropyl PG-dimonium chloride phosphate, and linoleamidopropyl PG-dimonium chloride phosphate dimethicone.

5. A preservative formulation according to claim 1 wherein the alkyl PG-dimonium chloride phosphate has the following formula: ##STR00003## wherein the “R” group is a C.sub.8-C.sub.20 alkyl group and “x”+“y” equals the integer 3.

6. A preservative formulation according to claim 1 further comprising one or more adjuncts selected from a group consisting of water, surfactants, emollients, fragrances and/or perfumes, extracts, oils and/or lotions, silicones, waxes, dyes and/or colorants, solubilizing materials, stabilizers, thickeners, defoamers, hydrotropes, buffers, builders, enzymes, bleaching agents, cloud point modifiers and preservatives.

7. A preservative formulation according to claim 1 wherein the hydroxyl acetophenone has the following formula: ##STR00004##

8. A preservative formulation according to claim 1 wherein the hydroxy acetophenone is present in the cleaning composition in an amount of from 0.1% to 1.0% by weight.

9. A preservative formulation according to claim 8 wherein the hydroxy acetophenone is present in the cleaning composition in an amount of from 0.25% to 0.75% by weight.

10. A preservative formulation according to claim 1 wherein the organic phospholipid is present in the cleaning composition in an amount of from 0.1% to 2.0% by weight.

11. A preservative formulation according to claim 10 wherein the organic phospholipid is present in the cleaning composition in an amount of from 0.2% to 1.5% by weight.

12. A cleaning wipe comprising a substrate and a cleaning composition loaded onto the substrate, the cleaning composition comprising a preservative formulation comprising a hydroxy acetophenone and an alkyl PG-dimonium chloride phosphate.

13. A cleaning wipe according to claim 12 wherein the alkyl PG-dimonium chloride phosphate has a fatty acid chain length between 8 and 20 carbons.

14. A cleaning wipe according to claim 12 wherein the alkyl PG-dimonium chloride phosphate is cocamidopropyl PG-dimonium chloride phosphate.

15. A cleaning wipe according to claim 12 wherein the substrate is a nonwoven substrate.

16. A cleaning wipe according to claim 12 further comprising one or more adjuncts selected from a group consisting of water, surfactants, emollients, fragrances and/or perfumes, extracts, oils and/or lotions, silicones, waxes, dyes and/or colorants, solubilizing materials, stabilizers, thickeners, defoamers, hydrotropes, buffers, builders, enzymes, bleaching agents, cloud point modifiers and preservatives.

17. A cleaning wipe according to claim 12 impregnated into a substrate, the substrate being from 100% to 500% of dry weight relative to the cleaning solution.

18. A preservative formulation for a wet wipe cleaning composition, the preservative formulation consisting of: a first preservative compound formed of a hydroxy acetophenone; and a second preservative compound formed of an organic phospholipid, wherein the organic phospholipid is an alkyl PG-dimonium chloride phosphate.

19. A method of enhancing bactericidal and fungicidal effects of a preservative formulation including an alkyl PG-dimonium chloride phosphate comprising: adding a hydroxyacetophenone to the preservative formulation.

Description

DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS

(1) The invention relates to a formulation for a cleaning composition (or simply a “cleaning composition”) comprising hydroxy acetophenone and a phospholipid complex. The cleaning composition of the invention can be used, for example, on personal care wet wipes such as baby wipes, facial wipes, moist toilet tissue, pet wipes, antibacterial wipes, hand-cleaning wipes and wipes for incontinence and feminine hygiene. As used herein, a “wipe” is a type of article suitable for cleansing or disinfecting or for applying a compound and/or removing materials and compounds from skin and surfaces, such as those disclosed in U.S. Pat. Nos. 7,101,612; 6,814,974; and 6,444,214, each of which is hereby expressly incorporated by reference in its entirety for all purposes, In particular, this term refers to an article for cleansing the body, including the removal of bodily waste.

(2) Preferably, the phospholipid complex is an organic phospholipid. Nonlimiting examples of organic phospholipids include alkyl PG-dimonium chloride phosphates with a fatty acid chain length between 8 and 20 carbons, such as, for example, cocamidopropyl PG-dimonium chloride phosphate. Other non-limiting examples of suitable alkyl PG-dimonium chloride phosphates include sodium coco PG-dimonium chloride phosphate, stearamidopropyl PG-dimonium chloride phosphate, myristalamidopropyl PG-dimonium chloride phosphate, sodium borageamidopropyl PG-dimonium chloride phosphate, linoleamidopropyl PG-dimonium chloride phosphate, linoleamidopropyl PG-dimonium chloride phosphate dimethicone, and the like.

(3) Referring to cocamidopropyl PG-dimonium chloride phosphate, specifically, the complex belongs to a family of products that are multifunctional, natural triglyceride phospholipids and are similar to phospholipids that occur naturally in the body. Cocamidopropyl PG-dimonium chloride phosphate is a coconut oil derived phospholipid composed predominantly of diester and triester phosphatides with multiple-chain groups. It displays a broad range of functional attributes including gentle cleansing and foaming properties, anti-irritation effects when combined with anionic or nonionic surfactants, unusually high substantivity, long-lasting skin conditioning, and broad spectrum antimicrobial activity. Cocamidopropyl PG-dimonium chloride phosphates generally have the following formula:

(4) ##STR00001##
wherein the “R” group originates from coconut oil (i.e. C.sub.S-C.sub.20 alkyl) and “x”+“y” equals the integer 3.

(5) As referred to herein, “hydroxy acetophenone” can be any of the isomers of hydroxyl acteophenone, but in one exemplary embodiment is p-hydroxy acetophenone, compound having the following structure:

(6) ##STR00002##

(7) It is to be understood that the formulation for the cleaning composition can optionally include various other components or adjuncts. The hydroxy acetophenone, alkyl PG-dimonium chloride phosphates and various other components are blended together to form a wet wipe solution or emulsion that can be applied to a substrate to form a usable wet wipe that is sufficiently preserved for storage and consumer use.

(8) The amount of hydroxy acetophenone in the final wet wipe solution is from 0.1% to 1.0% by weight, preferably 0.25% to 0.75% by weight. The amount of phospholipid complex (as part of the active ingredient) in the final wet wipe solution is 0.1% to 2.0% by weight, preferably 0.2% to 1.5% by weight. Hydroxyacetophenone and phospholipid complex is used in combination at above mentioned ratios to provide a robust, self-preserved anti-microbial and preservative formulation or system for use in cleaning composition such as utilized with various substrates to form wet wipes.

(9) As stated above, the cleaning composition may optionally include and/or be used in combination with one or more additional components or adjuncts. The adjuncts include, but are not limited to, water, surfactants, emollients, fragrances and/or perfumes, botanical extracts, oils and/or lotions, silicones, waxes, dyes and/or colorants, solubilizing materials, stabilizers, thickeners, defoamers, hydrotropes, chelating agents, buffers, builders, enzymes, solvents, bleaching agents, cloud point modifiers, preservatives and/or combinations of the same. Any suitable solvent can be utilized with the preservative formulation and cleaning composition including the preservative formulation of the invention, but in certain exemplary embodiments the solvent is selected from C.sub.3-C.sub.10 glycols/diols, or from C.sub.5-C8 glycols/diols.

(10) In one exemplary embodiment of the present invention, the cleaning composition can be loaded onto an absorbent substrate. The absorbent substrate is preferably water-insoluble. By “water insoluble” is meant that the substrate does not dissolve but may readily break apart upon immersion in water. This cleaning composition can be used on flushable wipes in which the nonwoven substrate readily breaks apart after flushing. The water insoluble substrate is the implement or vehicle for delivering the cleaning composition of the present invention to the skin to be cleansed and moisturized. As used herein, the terms “substrate” or “wipe” are intended to include any material on which a cleaning composition may be loaded. In functional applications, a substrate is used to clean an article or a surface, as by wiping. Substrates comprise woven or non-woven materials, typically made from a plurality of fibers. The substrate can be used by itself (typically by hand) or attached to a cleaning implement, such as a floor mop, handle, or a handheld cleaning tool, such as a toilet cleaning device. A wide variety of materials can be used as the substrate. Nonlimiting examples of suitable water insoluble substrates include nonwoven substrates, woven substrates, sponges, cloths, meshes, paper towels, napkins, cleaning pads, and the like.

(11) Preferred embodiments employ nonwoven substrates since they are economical and readily available in a variety of materials. By nonwoven is meant that the layer is comprised of fibers which are not woven into a fabric but rather are formed into a membrane, sheet, substrate, mat, absorbent core or pad layer or combinations thereof. Nonwoven substrates may be comprised of a variety of materials both natural and synthetic. By natural is meant that the materials are derived from plants, animals, insects or byproducts of plants, animals, and insects. By synthetic is meant that the materials are obtained primarily from various man-made materials or from natural materials which have been further altered. The conventional base starting material is usually a fibrous web comprising any of the common synthetic or natural textile-length fibers, or mixtures thereof. Non-limiting examples of natural materials useful in the present invention are silk fibers, keratin fibers and cellulosic fibers. Non-limiting examples of keratin fibers include those selected from the group consisting of wool fibers, camel hair fibers, and the like. Non-limiting examples of cellulosic fibers include those selected from the group consisting of wood pulp fibers, cotton fibers, hemp fibers, jute fibers, flax fibers, and mixtures thereof. Non-limiting examples of synthetic materials useful in the present invention include those selected from the group consisting of acetate fibers, acrylic fibers, cellulose ester fibers, modacrylic fibers, polyamide fibers, polyester fibers, polyolefin fibers, polyvinyl alcohol fibers, rayon fibers, polyurethane foam, and mixtures thereof. Examples of some of these synthetic materials include acrylics such as acrilan, creslan, and the acrylonitrile-based fiber, orlon; cellulose ester fibers such as cellulose acetate, arnel, and acele; polyamides such as nylons; polyesters such as fortrel, kodel, and the polyethylene terephthalate fiber, dacron; polyolefins such as polypropylene, polyethylene; polyvinyl acetate fibers; polyurethane foams and mixtures thereof.

(12) Without being bound to any theory, the invention has shown that the hydroxyacetophenone provides a preservative booster to the preservative system containing a phospholipid complex (such as cocamidopropyl PG-dimonium chloride phosphate) which may have some limited preservation activity independently, depending on the level in the final formulation.

EXAMPLE 1

(13) The following are the components and amounts of the same that represent a specific working example of the composition provided herein.

(14) 1) cocamidopropyl PG-dimonium chloride phosphate: 1.0%; 2) hydroxyacctophenone: 0.50%; 3) glycerin: 0.50%; 4) phenoxy ethanol 0.30%; 5) propanediol: 0.75%; 6) caprylyl glycol: 0.15%; 7) fragrance: 0.20%; and 8) citric acid 0.05%.

EXAMPLE 2

(15) Table 1 represents a specific example of a composition according to the invention that can be loaded onto a cleaning wipe.

(16) TABLE-US-00001 % in final Ingredient % use level % active/purity product Water 95.95 100 96.485 Cocamidopropyl PG- 1.00 46.5 0.465 Dimonium Chloride Phosphate Glycerin 0.50 100 0.50 Phenoxvethanol 0.50 100 0.50 Propanediol 0.75 100 0.75 1,2-Hexanediol 0.50 100 0.50 Hydroxvacetophenone 0.50 100 0.50 Fragrance 0.20 100 0.20 Citric Acid 0.10 100 0.10
It is noted that the range of cleaning solution impregnated into the substrate includes from between 100% to 500% of the dry weight of the substrate.

(17) The disclosures of all articles and references, including patents, are incorporated herein by reference. The invention and the manner and process of making and using it are now described in such full, clear, concise and exact terms as to enable any person skilled in the art to which it pertains, to make and use the same. All references cited in this specification are incorporated herein by reference. It is to be understood that the foregoing describes preferred embodiments of the present invention and that modifications may be made therein without departing from the spirit or scope of the present invention.