Cosmetic effervescent cleansing pillow

Details Cosmetic effervescent cleansing pillow Cosmetic effervescent cleansing pillow

2000-03-22

2001-04-17

Page, Thurman K. (Department: 1615)

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

C424S402000, C424S404000

Reexamination Certificate

active

06217854

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention concerns an effervescent foaming wipe article for body cleansing that imparts a pleasant sensory feel to a user's skin.
2. The Related Art
Classically the process of cleansing skin or other articles has employed a surfactant composition. Sometimes an implement has joined the composition. Implements such as sachets serve a multi-purpose. One function is as a delivery package for the surfactant. Sachets may also assist in generating foam. They also function as an abrasive assisting in the cleansing function.
An early example of cleansing pad technology is found in U.S. Pat. No. 1,808,834 (Busch Sr.). A fabric pouch is disclosed surrounding a cleansing composition mainly consisting of calcium and sodium carbonate.
U.S. Pat. No. 4,234,442 (Cornelissens) describes a sachet which can consist of a water permeable material filled with an acidic and an alkaline constituent. Adipic, succinic and glutaric acids exemplify the acidic constituent. Sodium bicarbonate and carbonate represent the alkaline ingredient.
U.S. Pat. No. 4,272,393 (Gergely) describes a cleaning article formed of a porous flexible substrate, especially a cellulosic paper, impregnated with detergent and a gas-generating system. The latter is formed by separating an acidic component such as citric acid from a basic component such as sodium carbonate in two separate areas of the substrate.
U.S. Pat. No. 4,515,703 (Haq), U.S. Pat. No. 4,600,620 (Lloyd et al.) and U.S. Pat. No. 4,603,069 (Haq et al.) all describe wiping articles impregnated with surfactant. These do not contain any effervescent ingredients.
WO 97/43366 (Askew et al.) reports an effervescent system to improve dispensability of granular laundry detergent powders into wash water of automatic washing machines. Citric acid and bicarbonate combinations are employed to generate effervescence.
It is an object of the present invention to provide a cleansing cloth containing an effervescent system activated by contact with water.
Another object of the present invention is to provide a cleansing cloth containing an effervescent system activated by contact with water to generate carbon dioxide which expands the lathering of cleanser components of the cloth.
Still a further object of the invention is to provide a cleansing cloth which imparts a pleasant sensory feel to skin during and after use.
It is to be noted that the subsequently described invention is broader than the objects or technical problems it is directed to solve.
SUMMARY OF THE INVENTION
A cosmetic article is provided for cleansing body surfaces, the article including:
a pouch formed of first and second sheets, at least one being water permeable, the first and second sheets defining a pouch between them, the pouch being sealed along all its perimeter; and
an effervescent cleanser composition in the form of an anhydrous dry solid being positioned within the pouch, the composition including:
(i) from about 1 to about 80% of an alkaline material;
(ii) from about 0.5 to about 80% of an acid material; and
(iii) from about 0.1 to about 30% of a solid surfactant.
Also provided is a method for cleansing skin involving wetting with water a cosmetic cleansing article, generating foam from the article and wiping skin surfaces with the wetted article, the article being the pouch with effervescent cleanser composition delineated above.
DETAILED DESCRIPTION OF THE INVENTION
Cosmetic wiping articles of the present invention when contacted with water billow to many times (more than 10 but often more than 40 times) their dry size when activated by water. The effervescent cleansing system exudes copious amounts of lather. A plumped “pillow” arises from the effervescent action. By careful control of the acidic and alkaline components, a squeaky clean rinsed feeling is felt on a user's skin.
A first essential component of compositions within the pouch is that of an acidic material. Suitable for this purpose are any acids present in dry solid form. Especially appropriate are C
2
-C
20
organic mono- and poly-carboxylic acids and especially alpha- and beta-hydroxycarboxylic acids; C
2
-C
20
organophosphorus acids such as phytic acid; C
2
-C
20
organosulfur acids such as toluene sulfonic acid; and peroxides such as hydrogen peroxide. Typical hydroxycarboxylic acids include adipic, glutaric, succinic, tartaric, malic, maleic, lactic, salicylic and citric acids as well as acid forming lactones such as gluconolactone and glucarolactone. Most preferred is citric acid. Also suitable as acid material may be encapsulated acids. Typical encapsulating material may include water soluble synthetic or natural polymers such as polyacrylates (e.g. encapsulating polyacrylic acid), cellulosic gums, polyurethane and polyoxyalkylene polymers. By the term “acid” is meant any substance which when dissolved in deionized water at 1% concentration will have a pH of less than 7, preferably less than 6.5, optimally less than 5. These acids preferably at 25° C. are in solid form, i.e. having melting points no less than 25° C. Concentrations of the acid should range from about 0.5 to about 80%, preferably from about 10 to about 65%, optimally from about 20 to about 45% by weight of the total composition.
A second essential component of compositions within the pouch is that of an alkaline material. The alkaline material is a substance which can generate a gas such as carbon dioxide, nitrogen or oxygen, i.e. effervesce, when contacted with water and the acidic material. Suitable alkaline materials are anhydrous salts of carbonates and bicarbonates, alkaline peroxides (e.g. sodium perborate and sodium percarbonate) and azides (e.g. sodium azide). Preferably the alkaline material is sodium or potassium bicarbonate. Amounts of the alkaline material may range from about 1 to about 80%, preferably from about 5 to about 49%, more preferably from about 15 to about 40%, optimally from about 25 to about 35% by weight of the total composition.
By the term “anhydrous” is meant the presence of no more than 5%, preferably no more than 3.5% and optimally no more than 1% water by weight of the total composition. Water of hydration is not considered to be water for purposes of the anhydrous definition. However, it is preferred to minimize, preferably to eliminate any water of hydration.
Advantageously the combined amount of acidic and alkaline materials will be at least about 1.5%, preferably from about 40 to about 95%, optimally from about 60 to about 80% by weight of the total composition.
A third necessary component of compositions according to the present invention is that of a dry surfactant, preferably a dry surfactant solid at 20° C. Most suitable for the present invention is sodium cocoyl isethionate. Other useful surfactants include sodium methyl cocoyl taurate and sodium lauryl sulfate. Surfactants may be of the anionic, cationic, nonionic, amphoteric, zwitterionic varieties and combinations thereof. Amounts of the dry surfactant may range from about 0.1 to about 30%, preferably from about 1 to about 30%, optimally from about 8 to about 15% by weight of the total composition.
A variety of skin benefit agents may be included to improve afterfeel properties. Advantageously these substances will be available as anhydrous dry powders. Alternatively these substances may be liquids deposited upon or into a powdered substrate (e.g. sodium bicarbonate or zeolite) to achieve a resultant dry flowing powder. Within the skin benefit agent scope are several categories of materials. These include emollients, antiaging actives, antibacterials and fungicides, skin lighteners, sunscreens and combinations thereof. Amounts of the skin benefit agents may range from about 0.001 to about 30%, preferably from about 0.1 to about 20°, more preferably from about 0.5 to about 10%, optimally between about 1 and about 5% by weight of the total composition.
Emollients may be in the form of natural or synthetic esters, silicone oils, hydrocarbons, starches, fatty acids and mixtures thereof. Typically the emollie

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