GB2282385A

GB2282385A - Aerosol shaving creams

Info

Publication number: GB2282385A
Application number: GB9417430A
Authority: GB
Inventors: Kenneth F Clark; Amrit Patel; Domenic Masucci
Original assignee: Colgate Palmolive Co
Current assignee: Colgate Palmolive Co
Priority date: 1993-08-30
Filing date: 1994-08-30
Publication date: 1995-04-05
Anticipated expiration: 2014-08-30
Also published as: FR2709419B1; ZA946016B; GB9417430D0; ITRM940552A1; FR2709419A1; DE4431365A1; GB2282385B; ITRM940552A0; IT1274152B

Description

2282385 1

Composition Background.of the Invention

Shaving creams are known to provide excellent lathering for the purpose of removing hair from the body. However, the shaving cream formulation should also have skin conditioning attributes including, for example, moisturising to provide a soft skin, less drag for a razor or any other apparatus which removes the hair, better skin feel during the shave and after the rinse, improved lather quality and a closer shave due to the increased efficacy of the formulation.

A new formulation has been discovered which provides better lather while improving the skin feel during the shave and after rinsing.

Summarv of the Invention In accordance with the invention there is a shaving cream formulation comprising a) a fatty acid soap or mixture thereof, b) a lipid soluble polyethylene or polyethylene derivative, and c) a lipid.

Detailed Description of the Invention

The fatty acid soaps are well known. Several soaps based on stearate and palmitic carboxyl acids give satisfactory results. Also natural fatty acids such as cocoa or tallow or combinations thereof can be used as a soap. Various metals can be used to form the salt of the fatty acids such as the alkali metals as well as the amine cations. The preferred salt is the sodium salt or the triethanolamine salt of the fatty acid. Particularly preferred is the salt, triethanolamine stearate. This soap is present in about 3 to 20 wt%, preferably about 5 to 12 wt% of the composition.

Polyethylene or polyethylene derived compound is any polyethylene or polyethylene derivative, normal or branched, which is solid at room temperature and which is 2 lipid soluble. By lipid soluble it is meant that the polyethylene or derivative forms a single phase which can be a semi-solid, homogenous gel or gel like material when heated up to a temperature range of about 90 to 100'C with the lipid. Examples of such polyethylenic materials include polyethylenes themselves up to about 4,000 weight average molecular weight, preferably 242 to 1,000, copolymers of ethylene with propylene with similar molecular weight and other like materials. The term lipid as used in this specification means any higher carbon containing material or long chain, i.e. hydrocarbon chain, essentially neutral material such as a long chain alcohol or long chain ether which can solubilise (as defined above) the polyethylene or polyethylene derivative. By long chain is meant carbon chains of about 20 to 70 carbon atoms or more.

The specific wt% of the polyethylene or polyethylene derived material is not unduly significant. However, above about 5 wt% provides a formulation which is greasy to the feel and is generally unsatisfactory. Therefore a wt%, based upon the composition of 0. 1 to less than about 5 wt% is preferred. Even more preferred is a wt% of about 0.2 to about 3.0. The lipid is preferably a wax or relatively high molecular weight material such as a mineral oil for example a petrolatum or a high molecular weight paraffin. Further examples of these lipids includes bees wax, microcrystalline waxes, paraffin waxes, and the high molecular weight fatty alcohols having at least 20 carbon atoms in the molecule. These lipids, when heated to a specific temperature range of 90 to 100'C, admixed with the polyethylenic material and then cooled down to room temperature, form a semi-solid or homogenous gel or gel like material similar to a paste. The lipid should be present in the f ormulation in 3 an amount of from about 0.5 to about 5 wt%, preferably about 1.0 to 3.0 wt% of the composition.

When admixed with the typical materials present in a shave cream formulation, the polyethylene and lipid produce a shave cream which provides a closer shave, better skin feel during the shave and after rinse, and improved lather quality in comparison to the shave creams without the polyethylenic material and the lipid. Examples of such shave cream materials include soaps such as triethanolamine stearate, synthetic surfactant such as the sulfates, sulfonates, sulfosuccinates, free fatty acids and propellants which provide the aerosolyzed composition to the consumer.

The shave cream can be formulated into an aerosol utilising the usual propelling ingredient. This is generally a volatile organic material that exists as a gas at ordinary room temperature and exists largely as a liquid at elevated pressures. Therefore such material can be practically maintained as a liquid under pressure in suitable containers. The propellant must be of such a nature that it does not destroy the lather or decompose the lather producing ingredients of the formulation. Generally these propellants with a very low solubility in water are preferred. The propellant desirably shows a solubility of less than about 32 ml of the propellant gas in 100 grams of water at 1 atmosphere of pressure and 25'C. The best propellants show a solubility of less than about 10 ml of gas per 100 grams of water at the same temperature (2 5 0 C) and pressure (1 atmosphere). Straight chain saturated aliphatic hydrocarbons of suitable vapour pressure which include propane, butane, isobutane and cyclobutane are suitable lather producing propellants. Of course the commercially available substitutes for methanes or ethanes such as materials 4 is available under the trade name, Freon, also give satisfactory results and may present no environmental impact. The propellants are normally present as about 3 to 8 wt% of the composition.

Following are examples illustrating the broad concept of the invention. These examples are intended to exemplify but not to narrow the broad concept.

In each of these examples the formulation was evaluated by applying it to the skin, shaving the beard and noting the sensorial attributes of the formulation in comparison to a control formulation having neither the polyethylenic material nor the lipid. As stated previously, the compositions of the invention were evaluated by the panel testers as providing a closer shave, better skin f eel during the shave and after the rinse, and improved lather quality in comparison to the control composition.

Example 1 COMPONENTS IN WEIGHT PERCENT Deionized Water Triethanolamine Stearate Glycerine Carbopol 934 (polyacrylic acid) Stearyl Alcohol Sulfosuccinate Ethox. Glycerides Lanolin Stearic Acid Polyethylene Mineral Oil ExamiDle II COMPONENTS IN WEIGHT PERCENT 82.7 6 3 0.3 1 3.5 0.5 0.5 0.5 0.25 1.75 Deionized Water Triethanolamine Stearate Glycerine Carbopol 934 (polyacrylic acid) Stearyl Alcohol Olefin Sulfonate Ethox.Glycerides Lanolin Stearic Acid Polyethylene Petrolatum Examnle III COMPONENTS IN WEIGHT PERCENT Deionized Water Triethanolamine Stearate Glycerine Ethox. Glycerides Polyethylene mineral oil Examnle IV COMPONENTS IN WEIGHT PERCENT Deionized Water Triethanolamine Stearate Na Lauryl Sulfate Ceteth 20 Stearic Acid Polyethylene Mineral oil 79 6 3 0.3 1 7 1.0 0.2 0.5 0.25 1.75 89.5 6 3 0.5 0.13 0.87 81.4 10 0.5 3 1 0.6 3.5 Polyethylene glycol ether of cetyl alcohol having an average of 20 ether molecules.

6

Claims

1. An aerosol shaving cream formulation comprising:

a. a soap polyethylene or polyethylene derivative, and lipid.

b.

C.

2. A formulation as claimed in claim 1 in which b is from about 0.1 to less than 5 wt% of the formulation.

3. A formulation as claimed in claim 2 in which b is from about 1.0 to 3. 0 wt%.

4. A formulation as claimed in any one of claims 1 to 3 in which c is from about 0.

5 to 5 wt% of the formulation.

is 5. A formulation as claimed in claim 4 in which c is from about 0.2 to about 3.0 wt%.

6. A formulation as claimed in any one of claims 1 to 5 in which b is a polyethylene having a weight average molecular weight of about 200 to 4, 000.

7. A formulation as claimed in any one of claims 1 to 6 in which c is a wax, a mineral oil or a high molecular weight paraffin.

8. A formulation as claimed in any one of claims 1 to 7 in which the soap is from about 3 to 20 wt-o. of the formulation.

9. A formulation as claimed in claim 1 substantially as specifically described herein with reference to the 7 accompanying examples.

10. A method of removing hair from the human body which comprises:

(a) applying an aerosol shaving cream as claimed in any one of the preceding claims to the portion of the body wherein hair removal is desired.

(b) shaving the portion of the body having the shaving cream applied thereto.

11. A canister adapted for dispensing under pressure a liquid therein, said liquid comprising an aerosol shaving cream formulation as claimed in any one of claims to 1 to 9.

is