JP2004352664A - Aerosol product for warm bath - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerosol product capable of keeping the shape for a long time by floating the product on warm water. <P>SOLUTION: The aerosol product for the warm bath can form a foam on the surface of water when 1 g of an aerosol composition comprising an aqueous undiluted liquid containing an active ingredient, and a liquefied gas is ejected on the water at 30-50°C, and the foam keeps the shape on the quiescent surface of the water and is dissolved in a short time when waves are made on the surface of the water. The aqueous undiluted liquid preferably contains a salt of a fatty acid including stearic acid. The aqueous undiluted liquid preferably contains a polyhydric alcohol. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０１０４】
【表２】

【０１０５】
【発明の効果】
本発明のエアゾール製品によれば、エアゾール組成物を湯浴に吐出したときに、静止している湯の表面でフォームの状態を５分以上維持できるため、フォームから香料や清涼化剤などが外気へ拡散しやすく、これらの薬剤の効果を充分に発揮できる。また、静止している湯の表面ではフォームが広がらずに湯との接触部分から順次溶解していく（フォームが下方に沈んでいくように溶解する）ため、溶解したフォームから薬剤が湯中で拡散していく様子を視覚的に確認することができる。さらに、水面を波立てると短時間で溶解するため、フォーム内の有効成分を用時に溶解させてその効果を得ることができる。
【図面の簡単な説明】
【図１】本発明のエアゾール製品から湯浴にエアゾール組成物を吐出したときのフォームが溶解する様子を示す図である。
【図２】従来のエアゾール製品から湯浴にエアゾール組成物を吐出したときのフォームが溶解する様子を示す図である。
【符号の説明】
１ エアゾール製品
２ フォーム
３ 水面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to aerosol products for warm baths.
[0002]
[Prior art]
As an application of an aerosol product, a bath agent used by floating a foam in a warm bath is disclosed (for example, see Patent Documents 1 and 2). Since the aerosol composition of such a bath preparation is an O / W type emulsion, the foam is easily dissolved in water. Normally, when the foam is floated on water, the foam spreads over a wide area and comes into contact with water. Since it is sequentially liquefied, its shape retention is poor. In particular, when floating in water at 30 to 50 ° C. (hereinafter referred to as hot water), the liquefaction of the foam is accelerated by the steam, and it is difficult to keep the foam for a long time.
[0003]
Further, a foaming bath agent containing a fatty acid neutralized with a 10% sodium hydroxide solution and foaming on bath water is disclosed (for example, see Patent Document 3). However, in this foaming bath agent, the surfactant contained in the component reacts with the slight amount of calcium and magnesium contained in the bath water, and the surfactant properties are lost. Disappears efficiently and cannot be held for a long time.
[0004]
Further, a foaming bath agent containing a surfactant having a cloud point of 40 ° C. or lower and foaming on bath water is disclosed (for example, see Patent Document 4). However, this foaming bathing agent also quickly defoams the foam when the temperature of the foam in contact with the hot water is higher than the cloud point of the surfactant, and the foam state cannot be maintained for a specific time.
[0005]
Moreover, the foamy deodorant which can form foam on the water surface is disclosed (for example, refer patent document 5). However, it is intended to block the bad odor generated from the source of bad odor by forming foam on the surface of the water stored in the toilet, and to prevent the bad odor from spreading into the space. It is mainly used for flush toilets and simple toilets. It is what is done.
[0006]
Furthermore, the foamable aerosol composition which mix | blends an alkaline agent with the ratio of 20-80 mol% with respect to a fatty acid is disclosed (for example, refer patent document 6). However, it is not intended to form foam on the water surface because it is not sticky when applied to the skin or hair, is excellent in dryness, and forms foam having elasticity.
[0007]
[Patent Document 1]
Japanese Patent Publication No. 3-78363 (page 2, column 3, line 27 to column 4, line 1)
[Patent Document 2]
Japanese Patent Laid-Open No. 7-53395 (paragraph number [0007])
[Patent Document 3]
JP-A-8-53341 (paragraph number [0012])
[Patent Document 4]
JP-A-8-53342 (paragraph number [0006])
[Patent Document 5]
JP 2001-46483 A (paragraph number [0004])
[Patent Document 6]
JP 2001-106611 A (paragraph number [0005])
[0008]
[Problems to be solved by the invention]
It is an object of the present invention to provide an aerosol product that can float a foam in hot water to maintain its shape for a long time (maintain the foam state) and can dissolve the foam in hot water in a short time during use. To do.
[0009]
[Means for Solving the Problems]
In the present invention, when 1 g of an aerosol composition composed of an aqueous stock solution containing an active ingredient and a liquefied gas is discharged into water having a temperature of 30 to 50 ° C., a foam is formed on the water surface, and the foam is stationary on the water surface. The present invention relates to an aerosol product for a hot bath which is shaped for 5 minutes or more and dissolves in a short time when the water surface is waved.
[0010]
The aqueous stock solution preferably contains a fatty acid salt containing stearic acid.
[0011]
The aqueous stock solution preferably contains a polyhydric alcohol.
[0012]
The aqueous stock solution preferably contains a volatile active ingredient.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, when 1 g of an aerosol composition comprising an aqueous stock solution containing an active ingredient and a liquefied gas is discharged into hot water having a temperature of 30 to 50 ° C., a foam is formed on the water surface, and the foam is stationary on the water surface. The present invention relates to an aerosol product for a hot bath which is shaped for 5 minutes or more and dissolves in a short time when the water surface is waved.
[0014]
The aerosol product for a warm bath of the present invention can retain a foam for 5 minutes or more on a still water surface when a certain amount of the aerosol composition is discharged into hot water. , A bathtub, etc.). In addition, the foam is heated in a state of floating in hot water, and volatile active ingredients such as a fragrance and a refreshing agent are easily diffused into the outside air, so that the effect of sufficiently exerting the effects of these drugs can be obtained. Furthermore, if the water surface is waved by stirring the hot water in which the foam is floating or immersing the body in hot water, the foam dissolves in the hot water in a short time, so use the active ingredients contained in the foam. Sometimes it can be dissolved to achieve its effect. In addition, when the water surface remains stationary, when the foam dissolves, the foam settles without spreading on the water surface, so that it is possible to visually confirm how the drug diffuses into the hot water. “Dissolving in a short time” means dissolving in 1/3 or less of the time that the shape can be retained on a stationary water surface, more preferably 1/4 or less, and particularly preferably 1/5 or less.
[0015]
The aerosol composition used for the aerosol product of the present invention is a foamable aerosol composition comprising an active ingredient, an aqueous stock solution containing a fatty acid and an alkaline agent, and a liquefied gas. While maintaining a foam state for a predetermined time, when the water surface is waved, it dissolves in hot water in a short time.
[0016]
The active ingredient is present in the foam in a state where it is discharged onto the hot water surface to form a foam. It is preferable to use a water-soluble active ingredient so that it can be exhibited. Examples of the active ingredient include various extracts, herbal medicines, refreshing agents, astringents, moisturizers, bactericidal (antibacterial) / preservatives, deodorants / deodorants, amino acids, vitamins, cleaning agents, and other various fragrances. Etc.
[0017]
Extracts include, for example, red pepper tincture, ginger tincture, assembly extract, peonies extract, loofah extract, rose extract, lemon extract, aloe extract, ginger root extract, eucalyptus extract, sage extract, seaweed extract, pine extract, placenta extract, silk Extract, garlic extract and the like.
[0018]
Herbal medicines include carrots, peony, green grass, alba powder, aloe powder, seaweed powder, hydrolyzed keratin powder, hydrolyzed collagen powder, sage powder, shobu and the like.
[0019]
Examples of astringents include zinc oxide, allantoin hydroxyaluminum, citric acid, and lactic acid.
[0020]
Examples of the humectant include ethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, collagen, xylitol, sorbitol, hyaluronic acid, caronic acid, sodium lactate, keratin, casein, lecithin, urea and the like.
[0021]
Examples of the bactericidal (antibacterial) / preservative include paraoxybenzoic acid ester, phenoxyethanol, benzalkonium chloride, chlorhexidine chloride, and parachlormetacresol.
[0022]
Examples of the deodorant / deodorant include lauryl methacrylate, geranyl crotolate, acetophenone myristate, benzyl acetate, benzyl propionate, methyl benzoate, methyl phenylacetate, tea extract and the like.
[0023]
Examples of amino acids include glycine, alanine, leucine, serine, tryptophan, cystine, cysteine, methionine, aspartic acid, glutamic acid, arginine and the like.
[0024]
Examples of vitamins include retinol, retinol palmitate, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, dl-α-tocopherol nicotinate, vitamin D2, dl-α-tocopherol acetate, dl-α-tocopherol acetate, pantothenic acid And biotin.
[0025]
Examples of the detergent include surfactants described later, proteolytic enzymes such as papain, trypsin and promeline, lipolytic enzymes such as phospholipase and pancreatic lipase, and polysaccharide-degrading enzymes such as lysozyme, heparinase and hyaluronidase.
[0026]
In addition, since the foam can be held for 5 minutes or more on a hot surface of 30 to 50 ° C., when a volatile active ingredient is blended, the volatile active ingredient is volatilized from the foam by the heat transmitted from the hot water and diffuses in the space. And the effect can be demonstrated. Examples of the volatile active ingredient include a refreshing agent and a fragrance.
[0027]
Examples of the refreshing agent and perfume include l-menthol, d-camphor, geraniol, eucalyptus oil, mint oil, loin oil, peppermint oil, and lavender oil.
[0028]
The compounding amount of the active ingredient is preferably 0.01 to 30% by weight, more preferably 0.1 to 20% by weight in the aqueous stock solution. When the compounding amount of the active ingredient is less than 0.01% by weight, the concentration of the active ingredient is too low, and the amount used for obtaining a predetermined effect tends to increase. On the other hand, if it exceeds 30% by weight, the concentration of the active ingredient is too high, and depending on the active ingredient, it may have an adverse effect.
[0029]
Fatty acids are blended to adjust the shape retention of foam (hardness of foam and solubility in hot water) and to adjust the shape retention time. Depending on the type of fatty acid, the amount of fatty acid, the type of alkali agent, the amount of alkali agent, etc., the shape retention (the hardness of the foam and the solubility in hot water) is adjusted appropriately according to the temperature of the hot water, and the shape retention time Can be adjusted.
[0030]
As the fatty acid, those having a melting point of 30 to 90 ° C. are preferable. For example, capric acid (31.6 ° C.), lauric acid (44.2 ° C.), myristic acid (53.9 ° C.), palmitic acid (63. 1 ° C.), stearic acid (69.6 ° C.), isostearic acid, behenic acid (81.5 ° C.) and the like. Fatty acids with a melting point of less than 30 ° C tend to have insufficient foam hardness and tend to shorten the shape retention time. Fatty acids over 90 ° C tend to harden the aerosol composition even at room temperature. Solubility is poor and tends to remain behind. In particular, when used in hot water of about 38 to 45 ° C. as a bath agent, those having a melting point of 50 to 70 ° C. are preferably used, and fatty acids including stearic acid are particularly preferably used. When fatty acids containing stearic acid are used, the shape retention time of foam is significantly longer for hot water of about 38 to 45 ° C., and volatile active ingredients such as fragrances and refreshing agents are sufficiently diffused into spaces such as bathrooms. And an excellent feeling of use can be obtained. Furthermore, when hot water is waved, the foam dissolves in a short time, and the active ingredients in the foam are dissolved in the hot water, and the effect can be obtained. In addition, you may use a fatty acid independently, However, You may mix and use 2 or more types.
[0031]
The blending amount of the fatty acid is preferably 0.5 to 10% by weight, particularly 1 to 8% by weight in the aqueous stock solution. When the amount is less than 0.5% by weight, the foam dissolves as soon as it floats on hot water, and the shape cannot be retained for a predetermined time. When the content exceeds 10% by weight, the foam does not dissolve in hot water but tends to remain behind and tends to feel dirty. Further, when stored for a long time at a low temperature, the fatty acid tends to precipitate in the aerosol composition and tends to be clogged with a valve.
[0032]
The fatty acid is neutralized with an alkaline agent, and part or all of the fatty acid becomes a fatty acid salt.
[0033]
Examples of the alkali agent include sodium hydroxide, potassium hydroxide, ammonium hydroxide, triethanolamine, diethanolamine, aminomethylpropanol, diisopropanolamine and the like.
[0034]
The blending ratio of the alkali agent to the fatty acid (hereinafter referred to as the degree of neutralization) is preferably in the range of 40 to 110 mol%, more preferably 45 to 100 mol%, particularly 50 to 95 mol%. When the degree of neutralization is less than 40 mol%, the fatty acid does not dissolve in the hot water but remains behind, and the hot water tends to become dirty. Moreover, when it preserve | saves for a long time at low temperature, a fatty acid precipitates or there exists a tendency for the viscosity of an aerosol composition to rise and to become difficult to discharge. When the amount exceeds 110 mol%, the fatty acid tends to dissolve in hot water, and when it floats on the surface, it tends to dissolve in hot water in a short time and become liquefied, making it impossible to retain the shape for a predetermined time. When fatty acids containing stearic acid are used, the effect of the neutralization degree by the alkaline agent on the shape retention of the foam is small, and the foam retention time is kept long even in the range of a high neutralization degree of 80 to 100 mol%. In addition, even when stored for a long period of time, there are no problems such as precipitation of fatty acids and an increase in the viscosity of the aerosol composition.
[0035]
In aqueous stock solutions, other surfactants, higher alcohols and polyhydric acids are used to improve foam shape retention, and to prevent fatty acids from precipitating during storage and the aerosol composition from solidifying. You may mix | blend alcohol, water-soluble polymer, etc. Other surfactants include nonionic surfactants, anionic surfactants, amphoteric surfactants, silicone surfactants, natural surfactants, etc., alone or in appropriate combination of two or more. Can be used.
[0036]
Nonionic surfactants include, for example, sorbitan fatty acid esters, glycerin fatty acid esters, polyglycerin fatty acids (such as di, tri, tetra, hexa, and deca), polyoxyethylene sorbitan fatty acid esters, polyoxyethylene sorbit fatty acid esters, Polyoxyethylene glycerin fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene castor oil / hardened castor oil, polyoxyethylene alkylamine / fatty acid amide, polyoxyethylene fatty acid Examples thereof include amides, fatty acid alkylolamides, and alkyl polyglucosides.
[0037]
Examples of the anionic surfactant include alkyl sulfates, polyoxyethylene alkyl ether sulfates, alkyl phosphates, polyoxyethylene alkyl ether phosphates, higher alkyl sulfate esters, higher fatty acid amide sulfonates, Examples thereof include phosphoric acid ester salts, alkylbenzene sulfonates, N-acyl glutamates, higher fatty acid ester sulfates, and α-olefin sulfonates.
[0038]
Examples of amphoteric surfactants include lauroyldimethylaminoacetic acid betaine, lauroylcarboxyethylhydroxyethylimidazolium betaine, and the like.
[0039]
Examples of the silicone surfactant include polyoxyethylene / methylpolysiloxane copolymer, polyoxypropylene / methylpolysiloxane copolymer, poly (oxyethylene / oxypropylene) / methylpolysiloxane copolymer, and the like.
[0040]
Examples of the natural surfactant include surfactin sodium, lecithin, saponin, soybean phospholipid, soybean lysophospholipid solution, and the like.
[0041]
The blending amount of the other surfactant is preferably 0.1 to 20% by weight, particularly 0.5 to 10% by weight in the aqueous stock solution. When the blending amount of the surfactant is less than 0.1% by weight, it is difficult to obtain the effect of improving the shape retention, and when it exceeds 20% by weight, stickiness and skin irritation may be strengthened. Tends to decrease.
[0042]
Higher alcohols can improve the shape retention of the foam, prevent the precipitation of fatty acids during storage, and prevent the aerosol composition from solidifying. As the higher alcohol, those having a melting point of 20 to 60 ° C. are preferable. For example, lauryl alcohol (24 ° C.), myristyl alcohol (37.9 ° C.), cetyl alcohol (49.3 ° C.), stearyl alcohol (58.0 ° C.) ) Etc. Higher alcohols with a melting point of less than 20 ° C tend not to have the effect of improving shape retention, the effect of preventing precipitation of fatty acids during storage, and the effect of preventing solidification of the aerosol composition. When it exceeds, it becomes difficult to mix with the aqueous concentrate. In addition, it is difficult to dissolve in hot water and tends to remain behind. In particular, when used as a bath agent, it is preferable to use one having a melting point of 40 to 60 ° C.
[0043]
The blending amount of the higher alcohol is 0.1 to 5% by weight, particularly 0.2 to 3% by weight, in the aqueous stock solution. If the blending amount of the higher alcohol is less than 0.1% by weight, it is difficult to obtain the effect of improving the shape retention, and if it exceeds 5% by weight, it is difficult to blend in the aqueous stock solution and the stickiness tends to be strong. There is a tendency for the feeling of use to decrease.
[0044]
Polyhydric alcohol can improve the shape retention of bubbles on a stationary water surface, and can easily dissolve in a short time when the water surface is waved. Examples of the polyhydric alcohol include 1,3-butylene glycol, dipropylene glycol, diethylene glycol, propylene glycol, ethylene glycol, glycerin, and the like, and glycols are particularly preferable from the viewpoint that the above effects are easily obtained. However, when glycerin is used alone, the effect of prolonging the shape retention time is low. The blending amount of the polyhydric alcohol is 0.5 to 20% by weight, particularly 1 to 10% by weight in the aqueous stock solution. When the blending amount of the polyhydric alcohol is less than 0.5% by weight, it is difficult to obtain the above effect, and when it exceeds 20% by weight, the sticky feeling becomes strong and the feeling of use tends to be lowered.
[0045]
Water-soluble polymers can improve the shape retention of the foam. Examples of water-soluble polymers include gelatin, agar, casein, dextrin, pectin, starch, sodium alginate, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, nitrulose, crystalline cellulose, modified potato starch, polyvinyl alcohol, and polyvinylmethyl. Examples include ether, polyvinylpyrrolidone, carboxyvinyl polymer, sodium polyacrylate, and the like. Of these, gelatin is preferable because it is easy to obtain a foam having excellent shape retention.
[0046]
The blending amount of the water-soluble polymer is 0.1 to 5% by weight, particularly 0.2 to 3% by weight, in the aqueous stock solution. When the blending amount of the water-soluble polymer is less than 0.1% by weight, it is difficult to obtain the effect of improving the shape retention, and when it exceeds 5% by weight, it becomes difficult to blend in the aqueous stock solution and the stickiness is strong. There is a tendency that the feeling of use tends to decrease. Also, the aerosol composition tends to solidify at low temperatures.
[0047]
Furthermore, in order to make it easy to mix | blend surfactant and a higher alcohol, and also the component which is hard to melt | dissolve in water, such as an active ingredient mentioned later and other components, you may mix | blend a lower alcohol with aqueous | water-based stock solution.
[0048]
Examples of the lower alcohol include monovalent alcohols having 2 to 5 carbon atoms such as ethanol and isopropanol.
[0049]
The blending amount of the lower alcohol is not particularly limited, but is preferably 0.1 to 30% by weight, more preferably 0.5 to 25% by weight in the aqueous stock solution. When the blending amount of the lower alcohol is less than 0.1% by weight, it is difficult to obtain the effect of blending the lower alcohol. When the blending amount exceeds 30% by weight, it is easy to dissolve in a short time when floated on hot water. There is a tendency that the bubbles cannot keep shape for a long time.
[0050]
The aqueous undiluted solution can contain pigments, oils and the like as other components.
[0051]
The pigment is used for the purpose of coloring hot water when the foam is dissolved in hot water, for example. Examples of the dye include Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 1 No. 1, Red No. 106, Yellow No. 4, Yellow No. 5, Green No. 3, Blue No. 1, Blue 2 and so on.
[0052]
The oil is used for the purpose of improving the feeling of use. Examples of the oil include hydrocarbons, ester oils, silicone oils, fats and oils, waxes, and the like.
[0053]
Examples of the hydrocarbon include pentane, hexane, liquid paraffin, squalane and squalene.
[0054]
Examples of the ester oil include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, myristyl myristate, diisobutyl adipate, diethoxyethyl succinate, and the like.
[0055]
Examples of the silicone oil include methylpolysiloxane, decamethyltetrasiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, and dimethylsilicone emulsion.
[0056]
Examples of fats and oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, sesame oil, castor oil, linseed oil, safflower oil, jojoba oil, coconut oil, palm oil And hardened castor oil.
[0057]
Examples of waxes include beeswax, lanolin, candelilla wax, paraffin wax, microcrystalline wax, jojoba wax, and polyethylene wax.
[0058]
The oil content is preferably 0.1 to 10% by weight in the aqueous stock solution. If the blending amount of the oil is less than 0.1% by weight, the blending effect of the oil tends to be difficult to obtain. If the blending amount exceeds 10% by weight, it tends to be separated from the aqueous stock solution, and it tends to be difficult to discharge a uniform composition.
[0059]
In the aqueous stock solution, a surfactant or the like is mixed in water, and this is heated to disperse the fatty acid or higher alcohol in a liquid state, and then an alkali agent is added to convert a part or all of the fatty acid into a fatty acid salt. Furthermore, it can be prepared by dissolving or dispersing active ingredients and the like.
[0060]
Examples of the liquefied gas include propane, n-butane, isobutane and a mixture thereof, liquefied petroleum gas, dimethyl ether, and a mixture of liquefied petroleum gas and dimethyl ether. Among liquefied gases, liquefied petroleum gas or a mixture of liquefied petroleum gas and dimethyl ether containing liquefied petroleum gas as a main component (mixed with 50% by weight or more of liquefied petroleum gas from the viewpoint of easily forming a foam that can be retained for a predetermined time when floated on hot water. Liquefied gas) is preferred.
[0061]
The blending ratio of the aqueous stock solution and the liquefied gas is preferably 95/5 to 60/40 (weight ratio), more preferably 93/7 to 65/35. When the blending ratio is larger than 95/5, foam foaming property is poor and foam is hard to be hardened. If it is smaller than 60/40, the specific gravity of the foam becomes light, it becomes difficult to dissolve in hot water, the foam remains on the hot water surface, and the hot water tends to feel dirty.
[0062]
Note that a compressed gas such as carbon dioxide, nitrogen nitrous oxide, nitrogen gas, compressed air, or oxygen gas may be filled as a pressurizing agent. In particular, when carbon dioxide is filled and used as a bath agent, the blood circulation promoting effect is obtained by carbon dioxide dissolved in the aerosol composition.
[0063]
The aerosol product of the present invention is obtained by filling a pressure-resistant container with an aqueous stock solution, fixing a valve, filling a liquefied gas, and mixing the two. At this time, the pressure in the pressure vessel is preferably 0.2 to 0.6 Pa, particularly 0.3 to 0.5 Pa at 25 ° C. If the pressure in the pressure vessel is less than 0.2 Pa, the foamability is poor, the foam specific gravity increases, the foam tends to sink into the hot water, and the foam tends to liquefy. When the product is left unattended, the temperature of the aerosol product becomes high, and the increase in the pressure in the container tends to be unfavorable.
[0064]
The reason why the foam formed by the aerosol product of the present invention is retained for 5 minutes or more on a still water surface can be considered as follows.
[0065]
(1) This is because the foam is hard and has excellent shape retention, so that it does not lose its shape even when it floats on stationary water, and contact between water and the foam is reduced. This will be described in detail. In the case of a single fatty acid, it is difficult to dissolve in hot water, but it becomes a fatty acid salt (soap) by neutralization with an alkaline agent, so that it dissolves because it is given water solubility. When the fatty acid salt is added to the aqueous stock solution, the discharged foam becomes hard and has good shape retention, and when the foam is floated on water, there is little contact between the foam and water, so that the shape retention time becomes longer. Here, when the degree of neutralization of the fatty acid is low, the amount of the fatty acid salt is small, so that the shape retention is deteriorated and the shape retention time is shortened. In addition, the solubility in water becomes poor, and precipitation tends to occur at low temperatures. If the degree of neutralization is too high, the solubility in water increases and the shape retention time is shortened.
[0066]
(2) By adding a water-soluble polymer, a higher alcohol, a polyhydric alcohol and the like to the aqueous stock solution, the shape retention of the foam is improved and the shape retention time of the foam is increased. When polypropylene glycol or 1,3-butylene glycol is blended as the polyhydric alcohol, the shape retention time becomes longer.
[0067]
(3) Since the foam holds the gas inside, the heat transfer from the hot water is slow and the melting temperature of the fatty acid salt in the foam is slow to reach, so the foam can be maintained for a long time. .
[0068]
The aerosol product of the present invention is used for hot baths, for example, bathing agents and cleaning agents (tableware, washing machines, bathtubs, etc.).
[0069]
In the conventional aerosol product, when the aerosol composition is discharged from the aerosol product 1 and the foam 2 is formed on the water surface 3, the foam 2 spreads over a wide area and is sequentially liquefied from a portion in contact with hot water. Therefore, the shape retention time of the foam 2 is short (FIGS. 2A to 2C).
[0070]
However, in the aerosol product of the present invention, when the aerosol composition is discharged from the aerosol product 1 to form the foam 2 on the water surface 3, the foam 2 does not spread on the water surface 3, and there are few contact parts with hot water. Dissolve only part (dissolve so that the foam sinks downward). Therefore, the shape retaining property of the foam 2 is good, and it can be visually confirmed that the foam is dissolved and the drug is diffused in the hot water (FIGS. 1A to 1C).
[0071]
In the aerosol product of the present invention, when 1 g of the aerosol composition is discharged into hot water to form a foam on the water surface, the foam is maintained on the surface where the foam is stationary for 5 minutes or more, preferably 10 minutes or more, and the foam state is maintained. can do. Therefore, a fragrance | flavor, a refreshing agent, etc. are easy to spread | diffuse from the foam to outside air, and can fully exhibit the effect of these chemical | medical agents. Effective if the foam is held for less than 5 minutes on the surface of the water, the fragrances and refreshing agents in the foam (components that diffuse in the space to demonstrate or recognize their effects) dissolve in the hot water and diffuse. Is difficult to obtain, and if it exceeds 30 minutes, the foam is difficult to dissolve in hot water and tends to remain behind. Furthermore, when the water surface is ruffled, it is preferably dissolved in a short time (less than 1/3 of the shape retention time on the stationary water surface, more preferably 1/4 or less, particularly preferably 1/5 or less, In terms of time, it is preferable to dissolve within 4 minutes, and preferably within 3 minutes), and the active ingredient contained in the foam can be diffused into the hot water in a short time.
[0072]
Here, the foam is retained on the water surface means that 1 g of the aerosol composition is discharged onto the water surface, the foam has a three-dimensional effect, and the height from the water surface is 1 cm or more.
[0073]
The time for which the foam is retained on the water surface refers to the time from when the aerosol composition is discharged until the height of the foam from the water surface falls outside the above range.
[0074]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to these.
[0075]
Example 1
<Aqueous stock solution> (wt%)
Stearic acid (* 1) 3.0
Myristic acid (* 2) 1.0
Triethanolamine 1.38
Cetanol 0.5
1,3-butylene glycol 5.0
Glycerin 1.0
POE methylpolysiloxane copolymer (* 3) 2.0
Polyoxyethylene (60) hydrogenated castor oil (* 4) 2.0
Palm oil fatty acid diethanolamide (* 5) 1.6
Gelatin 0.5
Fragrance 2.0
Water-soluble dye 0.02
Purified water balance
Total 100.0
[0076]
The degree of neutralization of the fatty acid is 60 mol%.
[0077]
The method for preparing the aqueous stock solution is as follows.
1. Purified water was heated to 40 to 45 ° C., and a surfactant was added to dissolve it.
2. Fatty acids were added and heated to 70-80 ° C. to disperse the fatty acids in a liquid state.
3. An alkaline agent (triethanolamine) was added to neutralize the fatty acid.
4. Cool to 30-40 ° C. and add fragrance, water-soluble dye and other ingredients to dissolve.
[0078]
<Aerosol composition> (wt%)
Aqueous stock solution 80.0
Liquefied petroleum gas (* 6) 20.0
Total 100.0
[0079]
The manufacturing method of the aerosol product is as follows.
1. 40 g of the obtained aqueous undiluted solution was filled in a pressure-resistant container (PET container, full injection amount: 100 ml), and the valve was fixed.
2. 10 g of liquefied petroleum gas was filled from the valve, and the container was shaken to mix the aqueous stock solution and liquefied petroleum gas.
* 1 Stearic acid 550V (mixture of 55% stearic acid and 45% palmitic acid, manufactured by Kao Corporation)
* 2 LUNAC MY-98 (manufactured by Kao Corporation)
* 3 HCO-60 (Nikko Chemicals)
* 4 SH-3771M (Toray Dow Corning Silicone Co., Ltd.)
* 5 Amizole CDE (manufactured by Kawaken Fine Chemical Co., Ltd.)
* 6 Vapor pressure at 25 ° C is 0.30 MPa (composition is a mixture of propane, normal butane and isobutane)
[0080]
Example 2
An aerosol product was produced in the same manner as in Example 1 except that the blending amount of triethanolamine in the aqueous stock solution was adjusted so that the neutralization degree of the fatty acid was 75 mol%.
[0081]
Example 3
An aerosol product was produced in the same manner as in Example 1 except that the blending amount of triethanolamine in the aqueous stock solution was adjusted so that the neutralization degree of the fatty acid was 100 mol%.
[0082]
Example 4
Example except that the amount of stearic acid in the aqueous stock solution was 4.0% by weight, myristic acid was not added, and the amount of triethanolamine was adjusted so that the neutralization degree of the fatty acid was 60 mol%. An aerosol product was produced in the same manner as in Example 1.
[0083]
Example 5
An aerosol product was produced in the same manner as in Example 1 except that the aqueous stock solution was 85% by weight and the liquefied petroleum gas was 15% by weight.
[0084]
Example 6
An aerosol product was produced in the same manner as in Example 1 except that the aqueous stock solution was 90% by weight and the liquefied petroleum gas was 10% by weight.
[0085]
Example 7
An aerosol product was produced in the same manner as in Example 4 except that 4.0% by weight of myristic acid was used instead of stearic acid. The neutralization degree of the fatty acid was 60 mol%.
[0086]
Example 8
An aerosol product was produced in the same manner as in Example 4 except that 4.0% by weight of palmitic acid was used instead of stearic acid. The neutralization degree of the fatty acid was 60 mol%.
[0087]
Comparative Example 1
An aerosol product was produced in the same manner as in Example 4 except that the amount of triethanolamine was adjusted so that the neutralization degree of the fatty acid was 35 mol%.
[0088]
Comparative Example 2
An aerosol product was produced in the same manner as in Example 4 except that the amount of triethanolamine was adjusted so that the neutralization degree of the fatty acid was 120 mol%.
[0089]
Comparative Example 3
An aerosol product was produced in the same manner as in Example 4 except that 4.0% by weight of oleic acid was used instead of stearic acid. The neutralization degree of the fatty acid was 60 mol%.
[0090]
Comparative Example 4
An aerosol product was produced in the same manner as in Example 4 except that 4.0% by weight of lauric acid was used instead of stearic acid. The neutralization degree of the fatty acid was 60 mol%.
[0091]
Comparative Example 5
<Aerosol composition> (wt%)
1,3-butylene glycol 8.0
Glycerin 4.0
99% ethanol 7.9
Methylparaben 0.1
Polyoxyethylene sorbitan monolaurate 0.5
Polyoxyethylene hydrogenated castor oil 1.5
Fragrance 1.0
Dye amount
Purified water 70.0
Dimethyl ether 4.0
Liquefied petroleum gas 3.0
Total 100.0
[0092]
An aqueous stock solution was prepared in the same manner as in Example 1 except that the composition shown in the aerosol composition was used, and an aerosol product was produced in the same manner as in Example 1 except that not only liquefied petroleum gas but also dimethyl ether was used. .
[0093]
Comparative Example 6
<Aqueous stock solution> (wt%)
Tetraoleic acid polyoxyethylene (60) sorbit 3.0
Ethanol 1.0
Glycerin 1.5
Methylparaben 0.2
Fragrance 0.7
Purified water balance
Total 100.0
[0094]
<Aerosol composition> (wt%)
The aqueous stock solution 95
Propellant (liquefied petroleum gas) 5
Total 100
[0095]
An aerosol product was produced in the same manner as in Example 1 except that the aqueous stock composition and the aerosol composition were used.
[0096]
<Test method>
1. Storage stability
About the obtained aerosol product, the following procedures a) and b) were repeated, and the presence or absence of the change of the aerosol composition was confirmed visually. It should be noted that a) → b) was defined as one cycle, and repeated 10 cycles.
a) Store in a constant temperature room at 45 ° C for 3 days
b) Store in a refrigerator at 5 ° C for 1 day
[0097]
Evaluation criteria
○: No abnormality in all 10 cycles.
Δ: Slight precipitation was observed during storage at 5 ° C., but the precipitate dissolved at room temperature (20 ° C.).
X: Precipitation was observed when stored at 5 ° C., and the precipitate was confirmed even at room temperature.
[0098]
2. Form retention time
1 g of the obtained aerosol composition was discharged onto the surface of bath water (42 ° C.) to form a foam on a stationary water surface. Next, the time from when the aerosol composition was discharged until the height of the foam from the water surface became lower than 1 cm was measured.
[0099]
3. Diffusion state of foam on water surface and dissolution state in bath water
1 g of the aerosol composition was discharged onto the surface of the bath water (42 ° C.), and it was visually confirmed that the foam spread on the surface of the bath water where the foam was stationary. Furthermore, the state in which the foam was liquefied and dissolved in the bath water was visually confirmed.
[0100]
Evaluation criteria
○: Formed a three-dimensional foam without spreading on the water surface after discharge, dissolved as the foam subsided over time, and it was confirmed that hot water was discolored from the foam .
Δ: A foam having a three-dimensional effect was formed which slightly expanded on the water surface after discharge, and the foam melted so as to sink as time passed, and it was confirmed that hot water was discolored from the foam.
X: It was not confirmed that the hot water spreads immediately after discharge and covers most of the bath water surface, and the hot water changes color.
[0101]
4). Diffusivity to outside air
1 g of the aerosol composition was discharged onto the surface of bath water (42 ° C.), and the smell of the fragrance in the bathroom was evaluated when the foam was liquefied and dissolved in the bath water.
○: The smell of fragrance is filled in the whole bathroom and it is comfortable.
Δ: The scent of the fragrance is felt, but the diffusion is insufficient and it is somewhat unsatisfactory.
X: Almost no smell of fragrance.
[0102]
5. Foam dissolution time when the water surface is waved
1 g of the aerosol composition was discharged onto the surface of bath water (42 ° C.), and when the water surface was gently swirled by hand to draw a circle, the time required for the foam to dissolve in the bath water was measured. .
[0103]
[Table 1]

[0104]
[Table 2]

[0105]
【The invention's effect】
According to the aerosol product of the present invention, when the aerosol composition is discharged into a hot water bath, the state of the foam can be maintained for 5 minutes or more on the surface of the hot water, so that the fragrance, the refreshing agent, etc. It is easy to diffuse to the surface and the effects of these drugs can be fully exerted. In addition, the foam does not spread on the surface of the hot water but dissolves sequentially from the contact area with the hot water (dissolves so that the foam sinks downward). You can visually check how it spreads. Furthermore, since the water surface is melted in a short time, the active ingredient in the foam is dissolved at the time of use, and the effect can be obtained.
[Brief description of the drawings]
FIG. 1 is a view showing a state in which foam is dissolved when an aerosol composition is discharged from an aerosol product of the present invention into a hot water bath.
FIG. 2 is a diagram illustrating a state in which foam is dissolved when an aerosol composition is discharged from a conventional aerosol product into a hot water bath.
[Explanation of symbols]
1 Aerosol products
2 forms
3 Water surface

Claims (4)

When 1 g of an aerosol composition composed of an aqueous stock solution containing an active ingredient and a liquefied gas is discharged into water at a temperature of 30 to 50 ° C., a foam is formed on the water surface, and the foam is held for 5 minutes or more on the static water surface. Aerosol products for warm baths that are shaped and dissolve in a short time when the water surface is waved. The aerosol product for warm baths according to claim 1, wherein the aqueous stock solution contains a fatty acid salt containing stearic acid. The aerosol product for warm baths according to claim 1 or 2, wherein the aqueous stock solution contains a polyhydric alcohol. The aerosol product for a warm bath according to claim 1, 2 or 3, wherein the aqueous stock solution contains a volatile active ingredient.

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