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Publication numberWO2004032859 A2
Publication typeApplication
Application numberPCT/US2003/031866
Publication date22 Apr 2004
Filing date7 Oct 2003
Priority date9 Oct 2002
Also published asEP1556006A2, EP1556006A4, US6800295, US7387787, US20040071755, US20050069575, WO2004032859A3
Publication numberPCT/2003/31866, PCT/US/2003/031866, PCT/US/2003/31866, PCT/US/3/031866, PCT/US/3/31866, PCT/US2003/031866, PCT/US2003/31866, PCT/US2003031866, PCT/US200331866, PCT/US3/031866, PCT/US3/31866, PCT/US3031866, PCT/US331866, WO 2004/032859 A2, WO 2004032859 A2, WO 2004032859A2, WO-A2-2004032859, WO2004/032859A2, WO2004032859 A2, WO2004032859A2
InventorsS. Fox Priscilla
ApplicantThe Dial Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: Patentscope, Espacenet
Water soluble sheet composition
WO 2004032859 A2
Abstract
The present invention is a composition in the form of a soluble sheet or film which has a variety of uses, particularly in the personal care field. Such sheets are preferably water soluble. An important component of these water soluble sheets is a 'base composition,' which includes a water soluble film forming polymer, a polyvinyl alcohol, and a humectant such as propylene glycol. Surfactant may be added to the liquid base composition so that, when the composition is dried into sheet form, the sheet will generate foam when exposed to water and have cleansing properties. Skin care ingredients may also be added to the base composition in addition to or in place of the surfactant. Volatile alcohols or hydrocarbons may also be incorporated into the liquid base composition to facilitate drying of the composition to form the flexible sheet product.
Claims  (OCR text may contain errors)
1 WHAT IS CLAIMED IS:
1. A water soluble sheet formed from a composition comprising a water soluble
polymer, polyvinyl alcohol, a humectant, and surfactant.
2. A water soluble sheet formed from a composition comprising a water soluble
polymer, polyvinyl alcohol, a humectant, and skin feel ingredients.
6 3. A base composition for use in preparing a water soluble sheet product, said
base composition comprising water and about 0.75% to about 5% by weight of a
water soluble polymer, about 6.5% to about 23% by weight of polyvinyl alcohol,
and about 0.75% to about 12%> by weight of a humectant.
4. The base composition of Claim 3 wherein said water soluble polymer is PVP .
' 1 5. The base composition of Claim 4 wherein said PVP is 2-pyrrolidone, 1-
ethenyl-homopolymer.
6. The base composition of Claim 3 wherein said polyvinyl alcohol has a
hydrolysis of between about 87%) and 90%.
7. The base composition of Claim 3 wherein said humectant is propylene
glycol.
8. A composition for use in preparing a water soluble sheet product, said
composition comprising up to about 65% by weight of surfactant, about 0.15% to
about 0.35% by weight of a water soluble polymer, about 1.3% to about 2.78% by
weight of polyvinyl alcohol, about 0.15% to about 0.59% by weight of ahumectant,
with the balance of the composition being water.
9. The composition of Claim 8 wherein said water soluble polymer is PVP.
10. The composition of Claim 9 wherein said PVP is 2-pyrrolidone, 1-ethenyl-
homopolymer.
11. The composition of Claim 8 wherein said polyvinyl alcohol has a hydrolysis
of between about 87% and 90%.
12. The composition of Claim 8 wherein said humectant is propylene glycol.
13. The composition of Claim 8 wherein said surfactant is a soap.
14. The composition of Claim 8 wherein said surfactant is a surfactant blend.
1 15. The composition of Claim 8 further including up to about 50%) by weight of
skin feel ingredients.
16. A composition for use in preparing a water soluble sheet product, said
composition comprising up to about 50% by weight of skin feel ingredients, about
0.15%) to about 0.35%> by weight of a water soluble polymer, about 1.3% to about
6 2.78%) by weight of polyvinyl alcohol, and about 0.15% to about 0.59% by weight
of a humectant, with the balance of the composition being water.
17. The composition of Claim 16 wherein said water soluble polymer is PVP.
18. The composition of Claim 17 wherein said PVP is 2-pyrrolidone, 1 -ethenyl-
homopolymer.
A 19. The composition of Claim 16 wherein said polyvinyl alcohol has a hydrolysis
of between about 87% and 90%.
20. The composition of Claim 16 wherein said humectant is propylene glycol.
21. A method for forming a water soluble sheet product, said method
comprising:
a. Forming a base composition comprising about 0.75%> to about 5% by
weight of a water soluble polymer, about 6.5% to about 23% by
weight of polyvinyl alcohol, from about 0.75%> to about 12%) of a
humectant, and water;
b . Adding a surfactant to said base composition to form a liquid product
composition, said liquid product composition being up to about 65%
by weight of said surfactant, between about 15% to about 90% of said
base composition, with the balance of said liquid product composition
being water;
c. Spreading said liquid product composition into sheet form; and
d. Drying said liquid product composition.
22. The method of Claim 21 wherein said water soluble polymer is PVP.
23. The method of Claim 22 wherein said PVP is 2-pyrrolidone, 1-ethenyl-
homopolymer.
24. The method of Claim 21 wherein said polyvinyl alcohol has a hydrolysis of
between about 87% and 90%.
25. The method of Claim 21 wherein said humectant is propylene glycol.
26. The method of Claim 21 wherein said surfactant is a soap.
27. The method of Claim 21 wherein said surfactant is a surfactant blend.
28. The method of Claim 21 further comprising adding up to about 50% by
weight of skin feel ingredients to said surfactant and said base composition to form
said liquid product composition.
29. A method for forming a water soluble sheet product, said method
comprising:
a. Forming a base composition comprising about 0.75%> to about 5% by
weight of a water soluble polymer, about 6.5%) to about 23%> by weight of polyvinyl alcohol, from about 0.75% to about 12% of a
humectant, and water;
b. Adding skin feel ingredients to the base composition to form a liquid
product composition, said liquid product composition being up to
about 50%) of said skin feel ingredients, between about 15% to about
90% of said base composition, with the balance of said liquid product
composition being water;
c. Spreading said liquid product composition into sheet form; and
d. Drying said liquid product composition
30. The method of Claim 29 wherein said water soluble polymer is PVP.
31. The method of Claim 30 wherein said PVP is 2-pyrrolidone, 1-ethenyl-
homopolymer.
32. The method of Claim 29 wherein said polyvinyl alcohol has a hydrolysis of
between about 87% and 90%.
33. The method of Claim 29 wherein said humectant is propylene glycol.
Description  (OCR text may contain errors)

WATER SOLUBLE SHEET COMPOSITION

FIELD OF THE INVENTION

The present invention relates to a composition in the form of a soluble sheet

which has a variety of uses, particularly in the personal care field.

BACKGROUND OF THE INVENTION

The prior art discloses various uses for soluble films. For instance, soluble

films have been used to enclose materials. U.S. Patent No. 5,385,737 to Shigeno,

et al. and Patent No. 4,544,693 to Surgant disclose soluble capsules into which

various substances can be placed.

Soluble films have also been used for cosmetic purposes. For example, U.S.

Patent No. 6,060,547 to Canter et al. discloses a water-in-oil emulsion film used to

form a makeup foundation. Another cosmetic application of water soluble films is

found in U.S. Patent No. 4,126,142 to Saute, which discloses a face mask which is

applied to the skin, allowed to dry, and then removed.

U.S. Patent No. 5,948,430 to Zerbe, et al, discloses a soluble film for oral administration. The film is used for the delivery of materials via the mucous

membranes, particularly the buccal mucosa.

Although means for forming films for various applications are known in the

art, there is a need for a water soluble film which will bind surfactant and other

ingredients, and which, when exposed to water, will dissolve and provide personal

cleansing such as can be obtained from, for example, hand soap or body wash.

There is also a need for a water soluble film to which skin care ingredients may be

added and which will release such skin ingredients upon exposure to sufficient

moisture.

SUMMARY OF THE INVENTION

The present invention is a composition in the form of a soluble sheet or film

which has a variety of uses, particularly in the personal care field. Such sheets are

preferably water soluble, which aids in their use in the personal care field. The

water soluble sheets of this invention will bind surfactant and other ingredients, and

which, when exposed to water, will dissolve and provide personal cleansing such as can be obtained from, for example, a soap bar or a liquid body wash.

An important component of these water soluble sheets is a so-called "base

composition," which includes a water soluble film forming polymer, a polyvinyl

alcohol, and a humectant such as propylene glycol. Surfactant may be added to the

liquid base composition so that, when the composition is dried into sheet form, the

sheet will generate foam when exposed to water and have cleansing properties. At

this stage, skin care ingredients may also be added to the base composition in

addition to or in place of the surfactant. Moreover, volatile alcohols or

hydrocarbons may also be incorporated into the liquid base composition to facilitate

drying of the composition to form the flexible sheet product.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a water soluble sheet product formed from

a novel base composition. Even without the addition of other ingredients, the base

composition, if allowed to dry, will form a water soluble sheet. As used herein, all weights given represent the weight of the material in a 100% active form in the

composition.

The base composition includes from about 0.75% to about 5% by weight of

a water soluble polymer, from about 6.5% to about 23% by weight of polyvinyl

alcohol, and from about 0.75% to about 12% be weight of a humectant, with the

preferred humectant being propylene glycol. The remainder of the base

composition is water. Up to about 2% by weight of magnesium aluminum silicate

may also be added to the base composition to enhance its slip characteristics.

However, magnesium aluminum silicate results in a more viscous base composition,

which, in turn, effects the thickness of the resulting soluble sheet product.

The preferred water soluble polymer is polyvinylpyrrolidone (PVP), and the

most preferred PVP is 2-pyrrolidone, 1-ethenyl-homopolymer having an average

molecular weight of about 60,000 Daltons. Such PVP is available as PVP K-30

from International Speciality Products, in Wayne, New Jersey. Although it has been

discovered that PVP is the water soluble polymer which works best in the base composition of the present invention, other water soluble polymers may be used in

place of or in combination with PVP. These water soluble polymers include

polyquaternium 10, magnesium aluminum silicate, VP/VA copolymer, ethyl ester

of PVM/MA copolymer, and sodium magnesium silicate. A suitable

polyquaternium 10 is available as Celquat CS 230M from National Starch in

Bridgewater, New Jersey. A suitable VP/VA copolymer is available as PVA 735

from International Specialty Products in Wayne, New Jersey. A suitable ethyl ester

of PVM/MA is available as Omnirez 2000 from International Specialty Products in

Wayne, New Jersey. An acceptable sodium magnesium silicate is available as

Veegum K from R.T. Vanderbilt in Norwalk, Connecticut. The level of water

soluble polymer or combination of water soluble polymers used in the base

composition should range from about 0.75% to about 5% by weight.

In the present invention, the polyvinyl alcohol functions as a film former, and

it is used in conjunction with the water soluble polymer. In the preferred

embodiment of the invention, the polyvinyl alcohol used has a hydrolysis of between about 87% and 90%. A suitable polyvinyl alcohol having the preferred

hydrolysis range is available as AirVol polyvinyl alcohol supplied by Air Products

and Chemicals, Inc. in Allentown, Pennsylvania. Either AirVol 540, having a

hydrolysis of between about 87% and 89%, or AirVol 523 S, having a hydrolysis of

between about 87% and 90%> is preferred. In the most preferred embodiment of the

invention, AirVol 523 S is used because it best enhances the solubility of the soluble

sheet product. It has been found that a polyvinyl alcohol having a hydrolysis below

87%o results in a sheet which is less soluble. Above 90%, the sheet again loses

some solubility.

The preferred humectant is propylene glycol, which serves to aid the sheet

product to absorb water. In addition to propylene glycol, other humectants which

can be used as the humectant in the base composition of the present invention

include: (1) glycerin; (2) dipropylene glycol; (3) glyceryl polymethracrylate; and

(4) glyceryl polymethracrylate in combination with propylene glycol. The level of

humectant used in the base composition is normally from about 0.75% to about 12% by weight. However, additional humectant can be added depending upon the end

use and desired characteristics of the soluble sheet. However, the amount of

humectant added should not adversely effect the formation of the soluble sheet

product.

In the preferred embodiment of the base composition, from about 1.5% to

about 2.5%o by weight of PVP, from about 13.5% to about 14.5% by weight of

polyvinyl alcohol, and from about 2.5% to about 3.5% of propylene glycol are used.

In the most preferred embodiment, about 1.75% of a PVP having an average

molecular weight of about 60,000 Daltons, about 13.91% of polyvinyl alcohol

having a hydrolysis between about 89% and 90%), and about 2.94% of propylene

glycol are used. The balance of the base composition is water.

In preparing the base composition of this invention, the water soluble

polymer and water are placed into a heatable container. With constant agitation,

polyvinyl alcohol is then slowly added to the water and water soluble polymer

mixture. When the polyvinyl alcohol has become saturated (starts to swell), heat is applied until the mixture reaches about 180 F . The mixture is agitated throughout

the heating process. Once the mixture has reached 180 F, heating is discontinued.

At this point, the humectant is added. Preferably, agitation is continued until the

mixture has cooled to about 120 F, although additives and water my be added to

the base composition while it is still hot. The base composition can be stored in a

tightly covered container. If it is to be stored for a long period of time prior to its

use for formation of the sheet product, a preservative such as DMDM hydantion

may be added. A suitable DMDM hydantion is available as Mackstat DM from

Mclntyre in University Park, Illinois.

In accordance with the present invention, various ingredients may be

combined with the base composition depending upon the intended use of the final

product. As used herein, the combination of base composition and surfactant and/or

other ingredients is referred to as the liquid product composition. I have found that

the base composition is compatible with a rather wide variety of surfactants,

emollients, humectants, beads, exfoliating agents, colorants and fragrance additives. Once the desired ingredients have been combined with such the base composition,

the resulting liquid product composition is then dried to form the water soluble

sheet product. When the base composition is combined with such other ingredients,

the level of PVP, polyvinyl alcohol, and propylene glycol in the liquid product

composition should be as follows: about 0.15% to about 0.35 % by weight of PVP;

about 1.3% to about 2.78% by weight of polyvinyl alcohol; and about 0.15% to

about 0.59% by weight of propylene glycol. In general, a liquid product

composition useful for skin conditioning can include up to about 50% by weight of

skin feel ingredients, about 15% to about 90% by weight of the base composition,

with the balance of the liquid product composition being water. Although up to

about 50%) by weight of the liquid product composition may be skin feel

ingredients, depending upon the chosen skin feel ingredient, less than 50% by

weight of the liquid product composition should be used if formation of the soluble

sheet product is adversely effected. In general, when surfactant is added to the base composition, a composition

useful for personal cleansing should include about 15% to about 90% by weight of

the base composition, and to up to about 65% by weight of surfactant. As is

discussed in more detail below, water soluble soaps, anionic surfactants, nonionic

surfactants, cationic surfactants, and surfactant blends may all be added to the base

composition. The combined weight of surfactant should not exceed about 65% by

weight of the liquid product composition; however, the amount of surfactant which

can be added without adversely effecting the formation of the soluble sheet product

depends upon the chosen surfactant.

When the base composition is blended with selected ingredients, it is

preferred that the combination of the base composition and such ingredients include

about 20% by weight of base composition. However, the amount of base

composition used will vary depending upon the desired viscosity of the liquid

product composition and the corresponding desired thickness of the soluble sheet

product. In general, the more viscous the liquid product composition is, the thicker the soluble sheet product formed from the liquid product composition will be. The

amount of surfactant added will vary depending upon the particular surfactant

chosen and the effect desired by the user. The addition of water is not required for

blending the base composition with a surfactant, but the change in the viscosity of

the base composition and surfactant mixture caused by the addition of water will

assist in the dispersal of additive components. Dilution with water will also reduce

product cost and produce thinner sheets.

In connection with the disclosure of surfactants, soaps, skin feel ingredients

and other ingredients, various exemplary formulations are given. These examples

are illustrative only, and they are not intended and do not limit the invention in any

way.

Anionic surfactants are the preferred surfactants for use with the base

composition of the present invention. Anionic surfactants which are compatible

with the base composition include ammonium laureth sulfate, sodium laureth

sulfate, and TEA-cocoyl glutamate. A suitable ammonium laureth sulfate is available as Standapol A from Cognis in Ambler, Pennsylvania. Sodium laureth

sulfate is also available from Cognis as Standapol ES-2. A suitable TEA-cocoyl

glutamate is available as Amisoft CT-125 from Ajinomoto USA, Inc. in Teaneck,

New Jersey.

When used as the surfactant in the making of the flexible sheet product of

the present invention, anionic surfactants produce a quick and long lasting lather.

Up to about 47% by weight of anionic surfactant can be added to the base

composition of the present invention. The following are representative

formulations embodying the present invention where anionic surfactants are mixed

with the base composition to form a liquid product composition which may then be

dried to form the soluble sheet product. As used in the Examples 1 through 5

below, the base composition includes about 1.75% PVP K-30, about 13.91%)

AirVol 523 S, about 2.94% propylene glycol, and about 81.4% water. Example 1

Ingredient Percentage by Weight

Base Composition 20 - 21% Ammonium Laureth Sulfate 20%-24% Deionized Water Balance

Example 2

Ingredient Percentage by Weight

Base Composition 20 - 21% Ammonium Laureth Sulfate 10 - 12% Deionized Water Balance

Example 3

Ingredient Percentage by Weight

Base Composition 89 - 90% Sodium Laureth Sulfate 2.5 - 3% Deionized Water Balance

Example 4

Ingredient Percentage by Weight

Base Composition 20 - 21% Sodium Laureth Sulfate 14 - 18% Deionized Water Balance Example 5

Ingredient Percentage by Weight

B ase composition 20 - 21 )

TEA-Cocoyl Glutamate 17- 18%

Deionized Water Balance

Nonionic surfactants may also be added to the base composition of the

present invention. However, when used as the only surfactant, such a mixture of

nonionic surfactants with the base composition will not form sheets. Consequently,

in order to achieve the formation of the desired soluble sheet product, it is necessary

to include a companion surfactant, such as an anionic surfactant, cationic surfactant,

amphoteric surfactant, or a surfactant blend. Depending to a degree upon the

nonionic surfactant chosen, up to about between 26% and 30%) by weight of a

nonionic surfactant can be incorporated into the liquid product composition. In

general, nonionic surfactant may be added to the base composition until the point

at which film formation, and, consequently, the formation of the soluble sheet

product, is adversely effected. However, in order to achieve sheet formation, the

total amount of nonionic and other surfactant added should not exceed about 65 > by weight of the liquid product composition. In order to form satisfactory sheets,

the nonionic surfactant should be added to the base composition in lower levels than

the other surfactants to be included in the mixture.

Cationic surfactants can also be used to form the sheets of the present

invention. Compatible cationic surfactants include DL pyrrolidone carboxylic acid

ethyl cocoyl arginate and sunflowerseedamidopropyl dimethylamine lactate. A

suitable DL pyrrolidone carboxylic acid ethyl cocoyl arginate is available as CAE

from Ajinomoto USA, Inc. in Teaneck, New Jersey. Depending upon the cationic

surfactant selected, up to about between 4.9% and 48% by weight of cationic

surfactant can be incorporated into the liquid product composition. The maximum

level of surfactant will vary depending upon the particular cationic surfactant

chosen. Thus, in order to obtain formation of the soluble sheet product, it has been

discovered that the maximum level of DL pyrrolidone carboxylic acid ethyl cocoyl

arginate that can be added to the liquid composition is about 4.9%) by weight, and

the maximum level of sunflowerseedamidopropyl dimethylamine lactate that can be incorporated into the liquid product composition is about 12%) by weight. In

general, cationic surfactant may be added to the base composition until the point at

which film formation, and consequently, the formation of the sheet, is adversely

effected.

When DL pyrrolidone carboxylic acid ethyl cocoyl arginate (CAE) is added

to the base composition and dried to form the flexible sheet product, a stretchy, thin

sheet which quickly dissolves in water is formed. In order to prevent over-dryness

of the sheet, the DL pyrrolidone carboxylic acid ethyl cocoyl arginate should be

solublized in propylene glycol prior to addition to the base composition. Following

is a representative formulation embodying the present invention of the combination

of a base composition and surfactant mixture using DL pyrrolidone carboxylic acid

ethyl cocoyl arginate. As used in Example 6 and 7, the base composition includes

about 1.75% PVP K-30, about 13.91% AirVol 523S, about 2.94% propylene

glycol, and about 81.4% water. Example 6

Ingredient Percentage by Weight

Base composition 20-21% CAE 4 - 4.9%

Propylene Glycol 44 - 45% Deionized Water Balance

"* 1 In mixtures containing DL pyrrolidone carboxylic acid ethyl cocoyl arginate,

foam production of the sheet may be enhanced by the addition of a betaine.

Nevertheless, it has been found that limited foam is generated by a mixture

containing DL pyrrolidone carboxylic acid ethyl cocoyl arginate unless an anionic

surfactant is also added to the mixture. The following is an example of a preferred

16 mixture including DL pyrrolidone carboxylic acid ethyl cocoyl arginate and an

anionic surfactant, sodium laureth sulfate:

Example 7

Ingredient Percentage by Weight

Base composition 19-20%

CAE 2 -3 %

Sodium Laureth Sulfate 7 - 9%

Propylene Glycol 28.5% - 29.5% l',6 Deionized Water Balance As previously noted, in order to achieve the formation of suitable sheets, the total

amount of cationic and other surfactant added should not exceed about 65% by

weight of the liquid product composition.

Water soluble soaps can also be used in the formation of the soluble sheet

product of the present invention. It can be used to modify the lather generation

potential of the soluble sheet and to slow the solubility of the sheet. Up to about

between 2% and 22% weight of soap can be incorporated into the liquid product

composition, depending upon the soap chosen. In general, soap and synthetic

surfactant may be added to the base composition until the point at which film

formation, and consequently, the formation of the soluble sheet product, is

adversely effected. Soap can be the only surfactant added to the base composition,

or, alternatively, it may be combined with another surfactant for addition to the base

composition. In order to achieve the formation of sheets, the total amount of soap

and synthetic surfactant should not exceed about 65% by weight of the liquid

product composition. Compatible soaps include sodium octonoate and potassium soaps. The following is an example of a composition using sodium octonoate. As

used in Example 8, the base composition includes about 1.75% PVP K-30, about

13.91% AirVol 523S, about 2.94% propylene glycol, and about 81.4% water.

Example 8

Ingredient Percentage by Weight

Base composition 19.5 - 20.5%

Sodium Octonoate 9 - 10%

Sodium Laureth Sulfate 12 - 15% Deionized Water Balance

Triethanolamine potassium vegetable oil soap is also a compatible soap and

is available as Mackanate WGS from Mclntyre in University Park, Illinois. The

following is an example of a mixture with Mackanate WGS. As used in Example

9, the base composition includes about 1.75% PVP K-30, about 13.91% AirVol

523 S, about 2.94% propylene glycol, and about 81.4% water.

Example 9

Ingredient Percentage by Weight

Base composition 19.5 - 20.5%

Mackanate WGS 19.5 - 20.5%

Deionized Water Balance

Skin feel ingredients, including skin conditioners such as vitamin E acetate,

silicones, petrolatum and aloe may be added to the base composition with or

without a surfactant. When used without a surfactant, a sheet containing such skin

conditioning additives may be applied directly to wet skin, such as right after

bathing or showering. When the sheet with skin conditioning additives is applied

to wet skin, the sheet dissolves leaving the skin conditioner on the skin.

Other skin feel ingredients may also be added to the liquid product

composition to provide visual or perceptual sensory or skin conditioning effects to

the ultimate product. Examples include loofah, jojoba beads, oat hulls, walnut

shells, petrolatum, cyclomethicone, sodium PEG-7 olive oil carboxylate, silicones,

aloe, vitamin E acetate, emollients and humectants. These skin feel ingredients can be added at levels required for aesthetic sensory perception, or skin conditioning

and have the ability to change the texture of the sheet itself.

Skin feel ingredients added to the liquid product composition at provide

visual perceptual sensory, or skin conditioning effects, may be added at the level

desired by the user; however, the amount of material added should not impair film

formation to create the soluble sheet product. In general, a liquid product

composition. Although up to about 50% by weight of the liquid product

composition may be skin feel ingredients, depending upon the chosen skin feel

ingredient, less than 50% by weight of the liquid product composition may have to

be used in order to avoid adversely effecting the formation of the soluble sheet

product.

The following examples further illustrate the present invention in which skin

feel ingredients which enhance the visual or perceptual sensory or skin conditioning

effects are added. These examples are not intended to limit the invention in any

way. Thus, altering the examples, or even using altogether different ingredients which are within the scope of the claims is not outside the contemplated invention.

As used in Examples 10 through 14, the base composition includes about 1.75%

PVP K-30, about 13.91% AirVol 523S, about 2.94% propylene glycol, and about

81.4% water.

Example 10

Ingredient Percentage by Weight

Base Composition 19 - 20%)

TEA-Cocoyl Glutamate 18 - 19%

Sodium PEG-7 Olive Oil Carboxylate 7 - 8%

Deionized Water Balance

Example 11

Ingredient Percentage by Weight

Base Composition 21-22%

Sodium Laureth Sulfate 9 - 12%

Sodium PEG-7 Olive Oil Carboxylate 11-12% Deionized Water 28-29%

Example 12

Ingredient Percentage by Weight

Base Composition 22 - 23% Ammonium Laureth Sulfate 10 - 13% High Oleic Sunflower Seed Oil 11 - 12% Perfume, Dye, etc. 1.5 - 2.5% Deionized Water Balance

Example 13

Ingredient Percentage by Weight

Ϊ 6 Base Composition 23.5-24.5% Ammonium Laureth Sulfate 9 - 12% Cetearyl Octonoate 10 - 11% Perfume, Dye, etc. 5 - 6% Deionized Water Balance

;,ι

Example 14

26 Ingredient Percentage by Weight

Base composition 42.5 43.5% Ammonium Laureth Sulfate 13 - 17% Jojoba Ester 2 - 3%

Antibacterial agents such as triclosan, benzethonium chloride,

chlorohexidine gluconate (CHG) and triclocarban may also be incorporated into the

liquid product composition. In the above examples surfactants are used which are typically used in a

variety of personal care cleansing products. However, surfactants which are usually

employed in household cleaning products such as laundry detergents may also be

used in the soluble sheet product. Such an embodiment has particular application

to treatment of stains on clothing. In this embodiment of the invention, sheets

formed by including such surfactants in the base composition are dampened and

applied to the stained area. The sheet is then allowed to remain on the stained area,

providing treatment to the stain, until washing occurs.

Volatile ingredients such as ethanol, petroleum ether, or isopentane can be

incorporated into the liquid product composition to help enhance the drying of the

soluble sheet product. These volatile materials serve to expand the liquid product,

and, at room temperature, cause a skin to form over the inflated surface of the

product. In the dried soluble sheet product, the skin remains semi-inflated, creating

air pockets, or cells, in the soluble sheet product. Air pockets may also be created

in the soluble sheet product by aerosolizing the liquid product composition. Alternatively, air pockets may be created in the soluble sheet product by

incorporating surfactant and certain oils into the liquid product composition. For

example, an addition of about 11% of sunflower oil to the base composition and

about 10 - 12% ammonium laureth sulfate results in a soluble sheet product with air

pockets or cells.

Once the desired ingredients have been incorporated into the base

composition, the liquid product composition is preferably is spread onto a relatively

flat surface to dry at room temperature. Alternatively, the liquid may be more

rapidly dried by subjecting it to a heat, such as an oven. It has been found that

drying the liquid product composition in about a 140 F oven works well. However,

higher temperature can be used for faster drying. Enhanced drying can also be

accomplished through a heated spray system, vacuum, or other known drying

methods.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4544693 *3 Jan 19841 Oct 1985Monsanto CompanyWater-soluble film
US5948430 *1 Aug 19977 Sep 1999Lts Lohmann Therapie-Systeme GmbhWater soluble film for oral administration with instant wettability
Non-Patent Citations
Reference
1 *See also references of EP1556006A2
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
WO2009095891A1 *30 Jan 20096 Aug 2009The Procter & Gamble CompanyPersonal care composition in the form of a flexible, porous, dissolvable solid structure
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Classifications
International ClassificationA61K9/70, A61K47/10, A61K9/00, A61K47/32
Cooperative ClassificationC11D17/044, A61K47/32, C11D17/049, A61K9/7007, A61K8/345, A61K8/8129, A61K47/10, A61K8/463, A61Q1/10, A61K9/0014
European ClassificationA61K9/00M3, A61K9/70B, A61K47/32, A61K47/10, A61K8/34D, C11D17/04F, A61K8/46C, A61Q1/10, A61K8/81G, C11D17/04B2S
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