JP2010024217A - Shaving gel foam composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaving gel foam composition, regarding a post-foaming shaving gel foam, which is in a gel form when ejected and completely foamed in a good foaming condition when coated and spread on skin and satisfactory as a shaving gel foam by foaming. <P>SOLUTION: The shaving gel foam composition contains as essential components water, a fatty acid, a nonionic surfactant having an HLB of not lower than 10, an alkali agent as a neutralizing agent, a post-foaming agent comprising normal pentane or isopentane, and an oily agent comprising a hydrocarbon or a silicone oil compounded 0.05-5 wt.% as a regulator of the gel's hardness. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a composition of a shaving agent used when shaving body hair such as wrinkles and unwanted hair with a razor, and more specifically, the contents discharged in a gel form are gradually foamed to form a foam. It relates to a shaving gel foam composition to be formed.

  A shaving agent is used when shaving swords and hair with a razor. Many shaving agents are mainly composed of fatty acid soaps, such as shaving creams, aerosol-type shaving foams, and post-foamed shaving gel foams in addition to general solid or powder shaving soaps.

  As the post-foaming type shaving foam, an aerosol composition in which gel is formed with soap and foaming is physically suppressed by the viscosity of the gel is known (Patent Document 1). Moreover, the post-foaming aerosol composition which the discharged gel has high transparency is proposed (patent document 2). In addition, a slow-foaming type post-foaming composition has been proposed in which a compressed gas is dissolved in an aqueous stock solution and foamed with moderately suppressed foaming after being discharged (Patent Document 3).

Japanese Patent Publication No.49-34912 Japanese Patent No. 3354678 Japanese Patent No. 2776540

  However, in the techniques of Patent Documents 1 and 2, the gel formed with soap has a high viscosity because it is stable over time, and part of the gel does not completely foam when spread on the skin, and the gel does not form on the skin. It remained and was not in a good foamed state. Moreover, the technique of patent document 3 adjusts the viscosity of the aqueous undiluted solution, and the method in which the compressed gas dissolves and foams has a small amount of the compressed gas dissolved, and the amount of foaming compared with a post-foaming agent such as pentane. The amount was not satisfactory as a shaving gel foam.

  The present inventor has intensively studied to solve the above problems. As a result, the hardness of the gel containing 0.05 to 5% by weight in a post-foaming agent comprising water, a fatty acid, a nonionic surfactant having an HLB of 10 or more, and an alkali agent, normal pentane or isopentane as a neutralizing agent is adjusted. By adding an oil agent consisting of a hydrocarbon or silicone oil as a preparation agent, a shaving gel foam composition that can be satisfied as a shaving gel foam by foaming in a good foamed state in which the gel is completely foamed when spread on the skin. The headline and here came to complete the present invention.

That is, the present invention provides the following shaving gel foam composition.
1. It is a nonionic surfactant having water, fatty acid, HLB of 10 or more, a post foaming agent composed of an alkali agent, normal pentane or isopentane as a neutralizing agent, and a gel hardness adjusting agent of 0.05 to 5% by weight. A shaving gel foam composition comprising as an essential component an oil comprising a hydrocarbon or silicone oil.
2. 2. The shaving gel foam composition according to claim 1, wherein the oil agent comprising hydrocarbon is liquid paraffin.
The shaving gel foam composition of the present invention contains 0.05 to 5% by weight of water, a fatty acid, a nonionic surfactant having an HLB of 10 or more, a post-foaming agent comprising an alkali agent, normal pentane or isopentane as a neutralizing agent. An oil agent comprising a hydrocarbon or silicone oil which is a gel hardness adjusting agent is an essential component. Hereinafter, the shaving gel composition of the present invention will be specifically described.

  The water used in the present invention serves as a base of the composition, and usually comprises tap water, distilled water, ion exchange water, etc., and is 40 to 98% by weight, preferably 60 to 95% by weight in the composition. If it is less than 40% by weight, sufficient foaming cannot be obtained, and if it exceeds 98% by weight, other components are reduced, which is not preferable as a shaving agent.

  Examples of the fatty acid include linear or branched saturated or unsaturated fatty acids having 10 to 22 carbon atoms. Specifically, fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, behenic acid, isostearic acid, linoleic acid, linolenic acid, ricinoleic acid, and fatty acids derived from natural fats and oils containing many of the above fatty acids Is mentioned. Preferably, a linear or branched saturated fatty acid having 12 to 18 carbon atoms is used. Of these, linear fatty acids such as myristic acid, palmitic acid and stearic acid, and coconut oil fatty acid containing a large amount of the fatty acids are particularly preferred. These fatty acids can be blended alone or in appropriate combination.

  Nonionic surfactants having an HLB of 10 or more are polyoxyethylene (hereinafter POE) (9) lauryl ether [HLB (hereinafter abbreviated): 14.5], POE (7) cetyl ether [11.5], POE ( 20) POE alkyl ethers such as stearyl ether [18.0], POE (7) oleyl ether [10.5], POE (20) behenyl ether [18.0], POE (10) polyoxypropylene (hereinafter POP) ) (4) POE / POP alkyl ethers such as cetyl ether [10.5], POE (20) POP (6) decyltetradecyl ether, polyethylene glycol monolaurate (10E.O.) [12.5], mono Polyethylene glycol stearate (10E.O.) [11.0], polyethylene monooleate Polyethylene glycol fatty acid esters such as coal (10E.O.) [11.0], POE castor oil such as POE (20) castor oil [10.5], POE (30) hydrogenated castor oil [11.0] Hardened castor oil, mono coconut oil fatty acid POE (20) sorbitan [16.9], monopalmitic acid POE (20) sorbitan [15.6], monostearic acid POE (20) sorbitan [14.9], monooleic acid POE sorbitan fatty acid esters such as POE (20) sorbitan [15.0] are exemplified. The HLB of the nonionic surfactant is 10 or more, preferably 10.5 or more, more preferably 12.0 or more. If HLB is less than 10, the oil agent which consists of hydrocarbons cannot be solubilized stably, and the hardness of a gel cannot be made constant. The blending ratio is not particularly specified, but the blending ratio capable of solubilizing the oil is preferably 0.1 to 12% by weight, more preferably 0.3 to 7% by weight.

  Although the alkali agent for neutralizing the said fatty acid is not specifically limited, For example, organic bases, such as alkanolamine and a basic amino acid, inorganic bases, such as an alkali metal hydroxide, are mentioned. Specifically, as alkanolamine, triethanolamine, 2-amino-2-methyl-1-propanol, etc., as basic amino acid, arginine, lysine, histidine, etc., as alkali metal hydroxide, sodium hydroxide, hydroxide Potassium etc. are mentioned. The base for neutralization is preferably the organic base compound from the viewpoint that the pH does not increase excessively and the salt stability does not precipitate and the storage stability is good.

  As the post-foaming agent, normal pentane or isopentane is essential, and in other cases, isobutane and normal butane can be appropriately combined. In order to obtain good foaming, the blending ratio is preferably 2 to 15% by weight, more preferably 3 to 10% by weight. If the blending ratio is less than 2% by weight, the foaming is too small to be preferred as a shaving agent, and if it exceeds 15% by weight, the foaming is too much to cause foaming, which is not preferred as a shaving agent.

  As the oil agent, hydrocarbons such as liquid paraffin, petrolatum, ceresin, solid paraffin and squalane, and silicone oil such as dimethylpolysiloxane and methylphenylpolysiloxane are preferable. Among these, liquid oils composed of hydrocarbons and liquid paraffin are liquid at room temperature, and are particularly preferable from the viewpoint of handling and usability. The blending ratio is preferably 0.05 to 5% by weight, more preferably 0.3 to 3% by weight. If it is less than 0.05% by weight, the gel is too soft to be preferred as a shaving agent, and if it exceeds 5% by weight, the gel is too hard to be preferred as a shaving agent.

  In the antiperspirant spray composition of the present invention, in addition to the above essential components, other general components used in cosmetics within a range not impairing the effects of the present invention, such as humectants, preservatives, pH adjustment An agent, a viscosity modifier, an antioxidant, a refreshing agent, a disinfectant, a fragrance, a pigment, and the like can be appropriately blended.

Examples and Comparative Examples

  Examples of the shaving gel foam composition of the present invention will be described below, but the present invention is not limited thereto.

Examples 1-2 and Comparative Examples 1-4
In accordance with the composition shown in Table 1 below, the ingredients of the shaving gel foam composition were prepared and filled into double container type aerosol containers. The following evaluation methods were used to evaluate (i) the state of the gel after ejection, (b) the state where the gel was applied and spread on the skin, and (c) the satisfaction as a shaving agent. The evaluation results are also shown in Table 1. The unit in an Example and a comparative example shows weight%.

(I) Gel state after discharge At 20 ° C., 2 to 3 g of the shaving gel composition was discharged, the time from discharge to foaming was measured, and evaluated according to the following criteria.
○: The time from foaming to foaming is 60 seconds or more Δ: The time from ejection to foaming is 30 seconds or more and less than 60 seconds ×: Time from foaming to foaming Is less than 30 seconds

(B) State applied and spread on skin At 20 ° C., 2 to 3 g of the shaving gel composition was discharged, and the state of the gel when lightly extended with a finger on the skin was observed.
○: No gel remains on the skin and everything is foamed △: A small amount of gel remains on the skin ×: A large amount of gel remains on the skin

(C) Satisfaction as a shaving agent Using the shaving gel compositions of Examples 1 and 2 and Comparative Examples 1 to 4, shaving was performed by 10 adult men, and the satisfaction as a shaving agent was evaluated. It was.
○: 8 or more people evaluated as satisfactory as a shaving agent Δ: 5-7 people evaluated as satisfied as a shaving agent ×: 4 or less people evaluated as satisfied as a shaving agent

The invention's effect

  The shaving gel composition of the present invention maintains a stable gel state after ejection, has a good foamed state when stretched on the skin, and is highly satisfactory as a shaving agent.

Claims (2)

It is a nonionic surfactant having water, fatty acid, HLB of 10 or more, a post foaming agent composed of an alkali agent, normal pentane or isopentane as a neutralizing agent, and a gel hardness adjusting agent of 0.05 to 5% by weight. A shaving gel foam composition comprising as an essential component an oil comprising a hydrocarbon or silicone oil. 2. The shaving gel foam composition according to claim 1, wherein the oil agent comprising hydrocarbon is liquid paraffin.