CA1269015A

CA1269015A - Exothermic stable foam compositions

Info

Publication number: CA1269015A
Application number: CA000503882A
Authority: CA
Inventors: Leonard Mackles
Original assignee: Product Resources International Inc
Current assignee: Product Resources International Inc
Priority date: 1985-03-18
Filing date: 1986-03-12
Publication date: 1990-05-15
Also published as: WO1986005389A1; CA1269015C; EP0215903A1; AU5549486A

Abstract

EXOTHERMIC STABLE FOAM COMPOSITIONS
ABSTRACT

A stable, anhydrous aerosol foam capable of suspending up to 50% by weight of dispersed anhydrous particulate solids capable of absorbing water exothermically is prepared from such solids and a foamable liquid oil, a foaming agent and a propellant.

Description

Description of the Invention The use of anhydrous particulate absorbant materials capable of sorbing water exothermically in autoheatir,g cos~etic and similar compositions is well knowrl. Menkart, et al., in Canadian Patent No. 748,049, disclose liquids, creams, gels and pastes which utilize materials such as silica gel, activated alumina, and alkali rnetal alumino silicate molecular sieves (Zeolites) in non-aqueou~- vehicles which warm automatically on contact with moisture in or on the skin. Analgesic preparations containing Zeolite in an anhydrous liquid are disclosed in r).s. Patent ~Jo. 4,379,143. Cosmetic vehicles comprising a carboxy vinyl polymer and Zeolites are disclosed in U.S. Patent No. 4,362.715. A toothpaste containing Zeolite is disclosed in U;S. Patent No.
4,349,533.
Despite the foregoing cdisclosures, no products based on such formulations have been successfully marketed because such formulations are cosmetically inelegant, i.e., they are very oily, greasy and pasty in consistency;
spread poorly on the skin, and leave the skin with a greasy feel and appearance. ~hese undesirable characteristics result from the fact that water or hydroxylated solvents such as alcohols or glycols must ~6~ S

normally be omitted in order to preserve the exothermic reactivity of the particulate absorbants.

U.S. Patent No. 4,639,367 issued on January 27 ,1987 describes and claims novel annydrous aerosol foams which are capable of suspending up to 50~ by weight of a dispersed solid without causing malfunction of an aerosol valve. The novel properties of these aerosol foams make them suitable for use as delivery systems for a wide range of therapeutic agents and provide ~n alternative to tablets or capsules, which are difficult to swallow or bad tasti~g llquid medications.
It has now been unexpectedly discovered that the aerosol foam delivery system described and claimed in U.S. Patent No. 4,639,367 is capable of functioning to provide a cosmetically elegant delivery system for formulations containing particulate absorbant mat~rials capable of sorbing water exothermically alone or in combination with other therapeutic or cosmetic 2a ingredients. Specifically, it ha~ now been found that a stable, anhydrouc aerosol fo,am or whip capable of suspending up to 50% by weight of a dispersed solid can be prepared from a foamable anhydrous liquid oil; a foaming agent; and controlled amounts of a propellant which are sufficient to produce a stable foam rather than a spray.
~he foam, as delivered from an aerosol canister, has the consistency of whipped cream~ is stable for extended ~z~ p~

periods and i.s hostile to the growth of micro-organisms.
While not wishing to be limited to any particular theor~, it is presently believed that the expansion of the formulations caused by the presence of a propellant causes the product to spread in the form of a thin Lilm on the skin, thereby giving a soft, silky, and co~rnetically elegant feel. The observed effect is analogous to a comparison between whipped cream and bu~ter. ~Ihile both of these products are produced from cream, butter is a dense, yreasy water in oil emulsion, whereas whipped cream is a liyht air in oil emulsion in which the oil is extended over a ouch yreater volume, thereby masking its greasy properties to a substantial extent. In the present invention, by foaming the oils ~Jith a propellant to produce a low density aerated whip or mousse, the greasy property of the oil in the forrnulation is eliminated. The invention rnakes it possible to achieve the foregoing results without valve clogging due to a novel combination of ingredients that produces a high viscosity formulation capable of keeping the small solid~
particles dispersed and of lubricating the aerosol valve.
The foamable, anhydrous liquid oils utilized in the present invention are varied and of no great critical significance. Typical among the organic oils useful for the present invention are those such as .soybean oil, partially hydrogerlated soybean oil, linseed oil, corn oil, peanut oil, sun10wer oil, cottonseed oil, olive oil, ~Z~ Y~

castor oil, liquid petrolatum, oleic acid, lauric acid, and mono- and diglyceride oils. As indicated above, the basic criterion for a liquid oil utilizable in the present invention is that it is foamable.
Typically, the oils utilized in the present invention are present in the formulation in a percentage of 40 to 95~ by weight of the total composition. A
pre~erred range is 50 to 70% by weight of the total composition. The amount of oil may be varied based upon the nature and arnount of the other ingredients in the formulation, such as the amount of dispersed solids.
Ordinarily, the percentaye amount of each other ingredient in the formulation is first selected and the oil is the ingredient added to bring the formulation to 100~.
Foaming agents utilizable in the prescnt invention are selected from the yroup consisting of lecithin, various polyol fatty acid esters and mixtures thereof, or solid silicone copolymers as disclosed in U.S.
Patent No. 3,770,648. Lecithin is the commercial name for a clas of naturally occurring cornpounds derived from soybeans. These compounds are phosphatides and phospholipids. The principal components of lecithin are a naturally occurring mixture of phosphatidyl choline, phosphatidyl ethanolamine, inositol phosphatides and related phosphorous containing lipids. Chemically, lecithin is described as phosphatidyl choline and is a mixture of the diglyceride~ of stearic, palmitic and oleic 3~

acids lirlked to the choline ester of phosphoric acid. It is available commercially as a 60% solution in soybean oil or as a granular powder essentially free of soybean oil.
A hydroxylated lecithin, modified to increase the hydrophilic properties is also commercially available.
This hydroxylated lecithin is commonly supplied as a 60%
solution in soybean oil.
The polyol fatty acid esters utilizable in the pre.~ent invention are commercial products and are comprised of three types:
l. Glycerol esters of fatty acids.

2. Polyglycerol esters of fatty acids.

3. Sorbitan esters of fatty acids.
The glycerol esters which have been found to be advantageous in generating a suitable anhydrous aerosol foam are prepared by standard esterification mettlods and have a HLB of bet~leen 2.5 and ~.5. Among the preferable glycerol fatty ester~ utilizable in the present invention are those ~uch a glycerol monostearate (HLB 3.2) and glycerol monooleate (HLB 3.4).
The polyglycerol esters utilizable itl the present invention are cornmercial products prepared by first polymerizing glycerine under alkaline conditions.
The polymerization is controlled to yield the particular desired average rnolecular weight. Investigations indicate that the polymerization of glycerol proyresses predominateJy in a straight-chairl marlrler, The ester~ are prepared by reactiny the polyglycerols with a specific fatty acid or by the alcoholysis of a triglyceride. By this method, it is possible to prepare esters ranging anywhere from hydrophilic monoesters such as decaglycerol monolaurate to a lipophilic decaglycerol decaoleate.
The polyglycerol esters preferably used in the present invention have an HLB value of between 4.0 and 13Ø Tnese have been iound to be most advantayeous in yeneratirly a suitable anhydrous aerosol foam. Among the preferable polyyly-erol esters utilizatle in the present invention are those such as: hexaylycerol distearate ( HLB

4.0), lecaylycerol tetraoleate (~LB 6.0), triylycerol morlostearate (Ill.B 7.0), triglycerol monooleate (HLB 7.0), octaylycerol monostearate (~ILB 12.0) and octaglycerol monooleate ( HLB 13 . O ) .
Ttle sorbitan fatty acid esters which have been found to be advantageous in generatin~ a suitable anhydrous aerosol foam are cormmercial pro~ucts prepared by standard esterification methods and have an ~ILB of bet 3.0 and 7.0 Amony the preferable sorbitan esters utilizable in the present inventiorl are tho;e suctl as sorbitan rnonostearate (IILB 4.7), sorbitan monooleate (HLB
4.3), and sorbitan rnono palmitate (HLB 6.7).
Additionally, a combination of any of the polyol fatty acid esters may be utilized in the present invention.
The polyol fatty acid esters are somewhat more hydrophilic than lecithin ;o that tneir use allows ttle ~2~

foamable, anhydrous liquid oil to be more easily dispersed when contacted with an aqueous medium. Additionally, they may be used in conjunction with lecithin in the same system which causes the lecithin to become more hydrophilic and therefore more water miscible than the lecithin alone.
qhe solid silicone copolymers which are useful as foaming agents in this invention are fully disclosed in U.S. Patent No. 3,770,648.
1~
The foaming agent utilized in the present invention i8 present in an amount of from 2 to 40~ by weigh~. The amount of foaming agent utilized depends upon the particular foaming agent being utilized, the particular foamable, anhydrous liquid oil being utilized and the propellant ~y~tem. A preferred range of foaming agent i~ from about 3 tO 15% by weight of the composition, with 4 to 6S being especially prefer~ed. It i8 a particularly desirable additional feature of the foaming agent~ that they pos~ess surfactant properties and, therefore, affect the rate ~t which the insoluble solid active ingredient of the foam is released. Accordingly, some variations in the amount of foaming agent in a particular formulation may be purposely chosen based on the nature of the solid active ingredient in order to control the rate of release.
The propellant can be selected from the class of ,, , --..

hydrocarbons that are gaseous under atmospheric pressures and liquefy when compressed, or certain fluorocarbons such as ~REON 115; monochloropentafluorethane; FREON 12, dichlorodifluoromethane; Dymel 22; chlorodifluoromethane;
Dymel 152; 1, 1, difluoroethaane; and dirnethylether.
Propellants other than the liquefied hydrocarbon or fluorocarbon gases can be used including compressed gases like nitrogen, nitrous oxide and carbon dioxide, but they do not produce the most desirable foams over the life of the product in use. The most commorlly used propellants are propane, butane and isobutane. Since these liquefied yases are soluble in the oil vehicle oE the composition, there is a resulting reduction in their vapor pressure.
There~ore, it is most advantageous to use propane since it has the hi~hest pressure of the three hydrocarbon propellants and, everl when dissolved in the low concentrations normally employed in this invention, produces a product with a pressure of 30-40 pounds per ~quare inch over atrnospheric pressure. This pressure is required to eject the foam frorn the container and produce a stable, dense foam. ~lowever, since propane is soluble in the oil base, there is very little pressure drop from the first to the last actuation of the aerosol valve and a satisfactory foam is produced when each dose is expelled.

The amount of propellant used is critical since too much will produce an undesirable spray rather than the desired stable "neasurable foam. Arnourlts of propellant in ~Z~

the range of from l-10 wt. % are operative, but 4-6 wt. %
is the preferred concentration based upon the total weight of the contents of the aerosol container. The amount of propellant used may vary somewhat, depending upon the nature and amount of the other ingredients in the composition but, in all cases, the lowest amount sufficient to forrn a stable, measurable foam without forrning an unmeasurable spray will be selected.
The anhydrous solid particulate matter capable of sorbiny water exothermally whicil can constitute between lU ana 5~% by weight of the basic composition, includes any materials irl this class which are physiologically compatible with hair and skin and which are further compatible with any pharmaceutically active agents to be added to ~aid basic composition In this general category may be included calcillm chloride, silica gel, activated alumina and alkali metal alumino silicate molecular BieVes. The latter generally beiny know as Zeolites. Of particular interest, are the 7,eolites, especially those of the general formula Mx/n[~L2)x(SiO2)yJ, wherein X
and Y are integers greater than ~, the molecular ratio of X to Y is 0.1 to l.l and M is a metal with a valence of n. These Zeolites are preferably in the activated foam which effectively means that they have been pretreated in 25 SUCtl a manner that they contain not in excess of 5~ by weight of water.
~he anhydrous aerosol ioam oi the present ~ Z~ ~} .3 ~

invention may be used as a vehicle for any of a large variety of active pharmaceutical materials or cosmetic inyredients in addition to the exothermic material.
The foam itself may be used as a carrier for a large variety of additional hair or skin modifying agents. Such modifying agents may be cosmetics or pharmaceuticals and may include both prescription and non-prescription agents. Thus, there may be incorporated hair dyes and hair conditioning agents, shampoos, shaving ~oaps, skin emollients, anti-darldruff agents, anti-seborrheic agents, anti-inflammatory agents, muscle relaxants, and any other generally accepted agents for modifyill~ the condition of hair, the surface of the skin and subdermal areas generally treated by topical application of physiologically active materials. As eY.amples of conditioning agents, there may be mentioned the quaternary salts of fatty acids having a carbon content of 12 to 18 carbon atoms, yenerally accepted conditioniny oils such as i~opropyl myristat~, isopropyl palmitate, isopropyl sebacate and the like may be used; as anti-dandru~f ayents, there may be utili~ed ~inc pyrithione or selenium 5ulfide; as anti-seborrheic or anti-inflarnmatory agents there may be mentioned hydrocortisone; as hair dyes any of the conventionally used hair dyes may be employed. This list is to be considered as merely illustrative and in no way lirniting.
Additional ayents not listed hereirl would be apparent to ~L2~

those skilled in the art.
rrhe amount of these added agents will depend upon the required effective concentration and whether they are solid or liquid. If they are liquid, they may constitute up to 95% of the total composition by weight, although 20 to 65~ is to be preferred. If they are solids, they may constitute up to 40~ of the total conlposition, provided that the combined proportion of the anhydrous solid particulate material and said solid agent rJoes not excee~ 50% of the entire composition.
A particularly important and surprising feature of the foams o~ this invention is their ability to suspend high concentrations, i.e., up to 50~ by weight, of solids. Preferably, the suspended particles are ground to a very fine particle size since this facilitates the formation and maintenance of a uniforrn dispersion and prevents clocJging. Particle sizes less than 100 microns, preferably in the range of 50 to 100 microns in diameter, ~re empioyed.
rrhe foam of the present invention can contain up to 50 wt. % of suspended solid particles without any appreciable valve malfunctiorlirlc3, and will usually contain in excess of 15 wt. % of such solid particles since a primary purpose of the foam system is to deliver a high concentration of the active ingredient in the solid particles in a relatively small dose. This ability to suspend higtl percentayes of solids WittlOUt valve s malfunctioning enables the aerosol foam system of the present invention to be utilized for a wide variety of formulations. The reasons for the unique ability of the foams to suspend such a high concentration of solids without valve clogging are not fully understood, but it is believed to result from a combination of the small particle size, the high viscosity of the foam formulation due tv its low propellant content which aids in keeping the particles dispersed and reduces agylomeration and settling, and the lubricating effect of the oil on the valve.
The foarns of the present invention are prepared by conventional formulating techniques. Thus, typically, the foamable anhydrous liquid oil and the foaming agent are mixed together alony with any other soluble ingredients of the composition. The solid to be dispersed is then added and the resultant mixture passed through an appropriate mill to ensure uniform particle size. The batch is then submitted for aerosol filling to an aerosol can. An aerosol valve is placed on the can and the can is crimped. The propellant is;then added by pressure filling.
In addition to the active solid to be dispersed in the foam and the essential ingredients of the foam, there may also be incorporated in the foams of the present invention any of a variety of additives or a combination thereof, commonly added to aerosol compositions or to toiletries, cosmetics, or pharmaceuticals. Typically, ~ 2~ ~t~.S

such additives are those such as emollients, lubricants, humectants, abrasives, perfumes and colorants.
It will be apparent to those skilled in the art that many modifications, both of materials and methods, may be practiced without departing from the purpose and intent of the disclosure.

Hot Oil Hair Mousse Foa~l 1. *Valfor 950, anhydrous sod.
1~ aluminosilicate (P.Q. Corp.) 35.00%
*

2~ Cabosil M-5, Fumed Silica .50 3. Decaglycerol Tetra Oleate 6.00 4. Polyethylene glycol 400 dioleate 2.00

5. Soybean Oil, partially hydrogenated 51.20

6. Propane 5.00

7. Fragrance 0.30 100. 0096 Procedure-The items #3, 4, 5,and 7 are mixed at ambient temperature until uniform. The powders #1 and #2 are added and mixed until uniform. The batch is passed though a colloid mill and then submitted for aerosol filling during which the propane is added.
Use When used as a hot oil hair mousse foam, it is * Trade-mark ~L2~

preferred, but not essential, that the hair be washed and touch dried with a towel so as to leave the hair moist but not dripping. A sufficent amount of mousse is applied to the hair to cover the entire area and worked into the hair. The contact with moist hair will cause the mousse to heat up giving rise to the desired heat conditioning.
The composition can be left on the hair as long as desired. In one modification of its use, a towel may be wrapped around the head in order to preserve the heat factor ~or somewhat longer.
While it i8 not totally necessary to do so, it is generally preferred to wash the composition out of the hair with a mild shampoo in the conventional manner.
The essential ingredients are:
1. The heat generating solid (Va;for 950) which is exothermic upon contact with water on the hair and scalp. Other heat generating anhydrous solids can be u ed in placé of the Valfor 950 in the same preparation, e.g., anhydrous calcium chloride, dried magnesium sulfate.
2Q 2. The foaming agent can be replaced by lecithin or the sorbitan monp esters or mixtures thereof or silicone #1252.
3. The foamable oil is any liquid anhydrous oily material.
The propellant is propane or any high pressure aerosol propellant.

~,2~

Hot Oil Anti-dandruff Mousse Foam -l. Valfor 950, anhydrous sod.
aluminosilicate (P.~. Corp) 35.00%
2. Cabosil M-5, ~umed Silica .50 ~. Sorbitan Mono stearate 4.00 4. Polyethylene glycol 400 dioleate 2.00 5. ~oy~ean Oil, partially hydrogenated 51.20 ~0 6. L'ropane 5.~0 7. ~inc Pyrithione 2.00 . Fragrance 0.30 100 . 00%
Procedure:
The i~em~ #3, 4, 5, 7 and ~ are mixed at 60C.

temperature until uniform. The powders #1 and ~2 are added and rnixed until uniform. The ~atch is cooled and passed through a colloid mill and then submitted for aerosol filliny during which the propane is added.
Use r 2~ It is preferred, but not essential, that the hair be washed and touch dried with a towel so as to leave the hair moist but not dripping. A sufficient arnount of mousse is applied to the hair to cover the entire area and worked into the hair. The contact with moist hair will cause the mousse to heat up givirlg risc to the desired 126~

heat conditioning. The composition can be left on the hair as long as desired. In one modification of its use, a towel may be wrapped around the head in order to preserve the heat factor for somewhat longer.
While it is not totally necessary to do so, it is generally preferred to wash the composition out of the hair with a mild shampoo in the conventional manner Hot Oil Halr Conditioninq Mousse Foam 1. Valfor ~50, anhydrous sod.
alurninosilicate (P.Q. Corp)35.00%
2~ Cabosil M-5, Fumed Silica .50 3. Lecithin, Powdered 3.00 4. Glycerol Mono Stereate 4.00 15 5. Poiyethylene glycol 400 dioleate2.00 6. Cotton Seed Oil 46.20 7. Propane 5,00

8. Stearyl dimethyl benzyl ammonium chloride 4,00 29 g. Fragrance 0,30 100 . 00 Procedure:
The items #3, 4, 5, 6 and 8 are mixed at 60 C.
temperature until uniform. The powders #1 and #2 are added and mixed until uniform. The batch is cooled and passed throu~h a colloid mill and then submitted for ~L2~3~

aerosol filling during which the propane is added.
Use It is preferred, but not essential, that the hair be washed and touch dried with a towel so as to leave the hair moist but not dripping. A sufficient amount of mousse is applied to the hair to cover the entire area and worked into the hair. The contact with moist hair will cause the mousse to heat up giving rise to the desired heat conditioning. The compositiorl can be left on the hair as lony as desired. In one modification of its use, a towel may be wrapped around the head irl order to preserve the heat factor for somewhat longer.
While it is not totally necessary to do so, it is generally preferred to wash the composition out of the hair with a mild shampoo in the conventional manner.

Hot Oil Anti-Seborrheic Emollient Mo~sse Foam l. Valfor 950, anhydrous sod.
aluminosilicate (P.Q. Corp) 35.00 2. Cabosil M-5, Fumed Silica .50 3. Dow Corning Silicone #1252 (50~ silicone copolymer, 50% isobutyl isobutyrate) 4.00 4. Polyethylene glycol 400 dioleate 2.00 5. Sunflower Oil 50.00 6. Propane 5.00 7. Hydrocor~isone Acetat~ 3.00 8. Fragrance 0.30 10 0 . 00%
Procedure:
The items #3, 4, 5, 7 and 8 are mixed at ambient temperature until uniform. The powders #l and #2 are added and mixed until uniform. The batch is passed through a colloid mill and then submitted for aerosol filling duriny which the propane is added.
Use The composition may be used as a skin emollient. In this use the affected area is washed, the ~urplus water shaken off, and the mousse applied to the affected area.
This mousse may be used as an anti-seborrheic hair mousse foam. It is preferred, but not essential, that the hair be washed and touch dried with a towel so as to leave the hair moist but not dripping. A sufficient amount of mousse is applied to the hair to cover the entire area and worked into the hair. The contact with 29 moist hair will cause the mousse to heat up yiviny rise to the desired heat conditioning. The composition can be left on the hair as long as desired. In one modification of its use, a towel may be wrapped around the head in order to preserve the heat factor for somewhat longer.

~ZG~ 5 Hot Oil Hair Dye Mousse Foam 1. Valfor g50, anhydrous sod.
alurninosilicate ~P.Q. Corp) 35.00 2. Cabosil M-5, Fumed Silica .50 3. Dow Corning Silicone #1252 (50% silicone copolymer, 50% isobutyl isobutyrate) 4.00 ~. Polyethylene glycol 400 dioleate 2 00 5. Peanut Oil 50.06 6. Propane 5.00 7. Maxilon Blue GRL(500%) 0.3 Deorlene Orange 7GL 1.2 Deorlene Orange 2GL 0.3 Basacryl Red FB 1.0 8. Pragrance 0. 30 100 . 00%
Procedure:
The items #3, 4, 5, 7 and 8 are mixed at ambient temperature until uniform. ,The powders #1 and #2 are added and mixed until uniform. The batch is passed through a colloid mill and then submitted for aerosol filling during which the propane is added.
Use When used as a hair dye, it i8 preferred, but not essential, that the hair be washed and touch dried 5 ~r~

with a towel so as to leave the hair moist but not dripping. A sufficient amount of mousse is applied to the hair to cover the entire area and worked into the hair.
The contact wit~ moist hair will cause the mousse to heat up giviny rise to the desired heat conditioniny. The composition can be left on the hair as long as desired.
In one modification of its use, a towel may be wrapped around the head in order to preserve the heat factor for sornewhat lonyer.
]o WhiLe it is not totally necessary to do so, it is generally preferred to wash the compositiorl out oE the hair with a mil~ shampoo in the conventional manner.
~XAMPLE 6 Warm Topical Analqesic Mousse l. Menthol l0.0%
2. Sodium Alumino Silicate (Valfor 950) - 35.0 3. Cabosil M-5 1.0 4. Sorbitan Monostearate 4.0 5. Decaglycerol Tetraoleate 6.0 6. Soybean Oil 10.0 7. Isopropyl Myristate 30.0 8. Propane 4.0 100 . U%
Procedure:
Items 4, 5, 6 and 7 are mixed at 60 C.

~L2~ a temperature until uniform. Items 2 and 3 are ad~ed and mixed until uniform. The mixture is cooled to 40 C. and item 1 is added and mixed until uniform. The mixture is then submitted for aerosol filling during which the propane is added.

Warm ToPical Anal~esic Mousse 1. Menthyl Salicylate 15.0%
2. ~odium Alumino Silicate (Valfor 950) 35.0 3. Cabo~il M-5 1.0 4. Sorbitan Monostearate 4.0 5. Decaglycerol Tetraoleate 6.0 6. Soybean Oil 34,0 7. Propane 5,0 100 . 0%
Procedure:
o Items 4, 5, and 6 are mixed at 60 C.
temperature until uniform. Items 2 and 3 are added and mixed until uniform. The mixture is cooled to 40C. and item 1 is added and mixed until uniform. The mixture is then submitted for aerosol filling during which the propane is added.

Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. An anhydrous aerosol foam composition comprising a foamable liquid oil, a foaming agent and a propellant, said propellant being present in an amount sufficient to produce a stable, measurable foam but insufficient to produce a spray when said composition is ejected through an aerosol valve, and dispersed solid particles, said particles comprising substantially anhydrous particulate material capable of absorbing water exothermically.

2. The composition of claim 1 wherein said propellant comprises 1 to 10 wt. % of said composition.

3. The composition of claim 2 wherein said particles comprise 10 to 50 wt. % % of said composition.

4. The composition of claim 3 wherein the average size of said solid particles is in the range of 50 to 100 microns.

5. A composition of claim 1 containing 10 to 50% of activated Zeolite of the formula Mx/n [AlO2)x)SiO2)y]
wherein x and y are integers greater than 6, the molar ratio of x to y is 0.1 to 1.1 and M is a metal with the valence of n.

6. The composition of claim 1 wherein said propellant comprises 1 to 10 wt. % of said composition, said foaming agent comprises 2 to 40 wt. % of said composition, said solid particles comprise 10 to 50 wt. %

of said composition and the balance of said composition is said liquid oil.

7. The composition of claim 6 wherein said propellant is a hydrocarbon.

8. The composition of claim 6 wherein said propellant is a fluorocarbon.

9. The composition of claim 6 wherein said liquid oil is selected from the group consisting of soybean oil, partially hydrogenated soybean oil, linseed oil, corn oil, peanut oil, sunflower oil, cottonseed oil, olive oil, castor oil, liquid petrolatums, oleic acids, lauric acid and mono- and diglyceride oils.

10. The composition of claim 6 wherein the foaming agent is selected from the group consisting of solid silicone polymers, lecithin, polyglycerol esters of fatty acids having an HLB value of between 4.0 and 13.0, glycerol esters of fatty acids having an HLB value of between 2.5 and 4.5, sorbitan esters of fatty acids having an HLB value of between 3.0 and 7.0 and mixtures thereof.

11. The composition of claim 10 wherein said foaming agent comprises 2 to 40 wt. % of said composition.

12. The composition of claim 10 wherein the foaming agent is a mixture of lecithin and glycerol monostearate.

13. The composition of claim 10 wherein the foaming agent is a mixture of lecithin and decaglycerol tetraoleate.

14. The composition of claim 10 wherein the foaming agent is triglycerol monooleate.

15. The composition of claim 10 wherein the foaming agent is decaglycerol tetraoleate.

16. The composition of claim 10 wherein the foaming agent is sorbitan monostearate.

17. The composition of claim 10 wherein the foaming agent is a mixture of decaglycerol tetraoleate and sorbitan monostearate.

18. The composition of claim 10 wherein the foaming agent is a mixture of decaglycerol tetraoleate and glycerol monostearate.

19. The composition of claim 10 wherein the foaming agent is a mixture of decaglycerol tetraoleate, sorbitan monostearate and glycerol monostearate.

20. The composition of claim 10 wherein the foaming agent is a mixture of sorbitan monostearate and glycerol monostearate.

21. The composition of claim 10 wherein the foaming agent is from about 3 to 15 wt. % of the composition.

22. The composition of claim 10 wherein the foaming agent is a mixture of lecithin, sorbitan monostearate and glycerol monostearate.

23. The composition of claim 10 wherein the foaming agent is a mixture of lecithin, sorbitan monostearate and decaglycerol tetraoleate.

24. The composition of claim 10 wherein the foaming agent is a mixture of lecithin and sorbitan monostearate.

25. As an article of manufacture, a pressurized aerosol container, said container having therein an anhydrous aerosol foam composition comprising a foamable liquid oil, a foaming agent and a propellant, said propellant being present in an amount sufficient to produce a stable, measurable foam but insufficient to produce a spray when said composition is ejected through an aerosol valve, and dispersed solid particles, said particles comprising substantially anhydrous particulate material capable of absorbing water exothermically.

26. The composition of claim 25 wherein said propellant comprises 1 to 10 wt. % of said composition, said foaming agent comprises 2 to 40 wt. % of said composition, said solid particles comprise at least 10 wt. % of said composition and the balance of said composition is said liquid oil.

27. The composition of claim 25 wherein said propellant is a hydrocarbon.

28. The composition of claim 25 wherein said propellant is propane.

29. The composition of claim 25 wherein said liquid oil is selected from the group consisting of soybean oil, partially hydrogenated soybean oil, linseed oil, corn oil, peanut oil, sunflower oil, cottonseed oil, olive oil, castor oil, liquid petrolatums, oleic acids, lauric acid and mono- and diglyceride oils.

30. The composition of claim 25 wherein the foaming agent is selected from the group consisting of solid silicone polymers, lecithin, polyglycerol esters of fatty acids having an HLB value of between 4.0 and 13.0, glycerol esters of fatty acids having an HLB value of between 2.5 and 4.5. sorbitan esters of fatty acids having an HLB value of between 3.0 and 7.0 and mixtures thereof.

31. A composition of claim 25 containing 10 to 50% of activated Zeolite of the formula Mx/n [AlO2)x)SiO2)y]
wherein x and y are integers greater than 6, the molar ratio of x to y is 0.1 to 1.1 and M is a metal with the valence of n.