JP4996845B2 - Foam-type fluorine coating agent - Google Patents

Description

  The present invention relates to a foamy fluorine coating agent which is discharged as a foam by mixing with air and passing through a porous membrane.

  When fluoride is applied to the enamel surface of the tooth, the fluorine concentration in the enamel surface layer increases, and the occurrence of caries can be prevented. Conventionally, liquid or gel coating agents have been used as fluorine coating agents. However, since the liquid form is soaked in a cotton ball and applied to the tooth surface, the treatment takes time and there is a problem in efficiency. Moreover, since the gel-like thing uses the tray method which bites the tray on which the gel is placed, it is simple, but it is difficult to spread because of its high viscosity. Furthermore, considering the risk of acute poisoning of fluorine, the amount used must be minimized.

In order to solve such a point, recently, a method has been proposed in which a propellant is blended in a liquid fluorine coating agent, filled in an aerosol container, and foamed (see Patent Documents 1 and 2). By foaming, the amount used can be greatly reduced without impairing the area of contact between the foam and the teeth. However, a flammable gas is usually used as a propellant, which is not preferable from the viewpoint of the environment such as not only having a problem with safety in the oral cavity but also being unable to easily discard or reuse the container. On the other hand, in order to foam without using a propellant, there is a method of using a former container having a structure in which the composition is mixed with air and passed through a porous film and discharged as a foam. As for the composition filled in the container, many patents are disclosed in the field of “oral use”, and there are techniques disclosed as general cleaning agents (Patent Documents 3 to 6). Furthermore, a foamy fluorine coating agent for oral cavity containing a fluoride ion supplying fluoride ion, a phosphate ion, an anionic surfactant, and a nonionic surfactant using a former container without using an aerosol container is disclosed. (See Patent Document 7).

U.S. Pat. No. 4,770,634 US Pat. No. 5,071,637 Japanese Patent Laid-Open No. 10-087456 JP-A-10-087460 JP-A-10-114636 Japanese Patent Laid-Open No. 10-114636 Japanese Patent Laid-Open No. 11-116451

  However, if high-concentration fluorine, which is usually used in fluorine coatings, is simply added to these foam preparations, the liquid composition will precipitate if left in a low-temperature environment for a long time. Or foaming from the foam container, or even if it is discharged, the foam quality deteriorates, and the fluorine coating agent is widely used in both public health and dentistry settings. Although it is necessary for people, it is too costly to produce a product, and it has not been possible to supply a foamy fluorine coating agent of a quality that can be actually used. In particular, when stored in an environment at a low temperature for a long period of time, if there is a precipitate such as a precipitate, it cannot be discharged in the form of a foam. Therefore, a stable foam preparation has been demanded even in a low temperature range.

  The object of the present invention has been made in view of the above circumstances, and in a composition filled in a foam container that is mixed with air and passed through a porous membrane and discharged as a foam, it is possible to stably hold the foam at a low cost. Powerful, excellent in feeling of use, safe for human body and environment, and does not cause cloudiness or precipitation even when stored and stored in a low temperature environment for a long time while containing a high concentration of fluoride ions And providing a foamy fluorine coating agent having stable properties.

As a result of intensive studies to achieve the above object, the present inventors
Fluoride to supply fluoride ions,
Phosphate ion,
By containing three or more compounds each containing a specific amount of anionic surfactant and further having a hydroxyl group,
The present inventors have found that a foamy fluorine coating agent having good property stability that does not cause white turbidity or precipitation can be obtained, and the present invention has been completed.

That is, the present invention
Fluoride supplying 0.5-2% by mass of fluoride ions,
0.01-10% by mass of phosphate ions,
A liquid composition comprising 0.2 to 5.0% by mass of an anionic surfactant and further containing three or more compounds having a hydroxyl group,
The present invention provides a foam fluorine coating agent which is filled in a former container having a porous film and becomes foamed when discharged from the container.

  According to the present invention, the foam to be discharged while containing a high concentration of fluoride ions has a stable foam holding power, is excellent in feeling of use, is safe for the human body and the environment, and is left in a low temperature environment for a long time. Thus, it is possible to provide a stable foamy fluorine coating agent having a property that does not cause cloudiness or precipitation even when stored.

  The fluoride used in the foamy fluorine coating agent of the present invention contains an amount for supplying 0.5 to 2% by mass of fluoride ions. If the fluoride ion is less than 0.5% by mass, the enamel fluorine uptake effect is small, and if it is more than 2% by mass, it is unstable as a fluoride coating agent. The fluoride to be used is not particularly limited. For example, sodium fluoride, potassium fluoride, ammonium fluoride, calcium fluoride, copper fluoride, zinc fluoride, lithium fluoride, cesium fluoride, fluorine Zirconium fluoride, tin fluoride, hydrofluoric acid, sodium monofluorophosphate, potassium monofluorophosphate, sodium titanium fluoride, potassium titanium fluoride, N′-octadecyltrimethylenediamine-N, N, N ′ -Tris (2-ethanol) -dihydrofluoride, 9-octadecenylamine-hydrofluoride, hexylamine hydrofluoride, laurylamine hydrofluoride, glycine hydrofluoride, alanine hydrofluoride, sodium hexafluorosilicate , Fluorosilane, fluorine Such as diammine silver and the like, which may be used alone or in combination of two or more. Of these, preferably one or both of sodium fluoride and hydrofluoric acid are selected.

  Moreover, the foamy fluorine coating agent of this invention contains 0.01-10 mass% of phosphate ions, More preferably, it contains 0.05-5 mass%. If the phosphate ion is less than 0.01% by mass, enamel demineralization is remarkable, and if it exceeds 10% by mass, the effect of inhibiting the dissolution of enamel is not increased so much, which is uneconomical and the feeling of use is remarkable. Inferior. Phosphorus oxides supplying these phosphate ions are not particularly limited. For example, phosphoric acid, disodium hydrogen phosphate, sodium dihydrogen phosphate, trisodium phosphate, dipotassium hydrogen phosphate , Potassium dihydrogen phosphate, tripotassium phosphate, ammonium monohydrogen phosphate, tricalcium phosphate, disodium diglyceryl phosphate, dicetyl phosphate, dicetyl aluminum phosphate, calcium hydrogen phosphate, diammonium hydrogen phosphate Cetyl phosphate, treoyl phosphate, tristearyl phosphate, tripalmityl phosphate, ammonium dihydrogen phosphate, magnesium phosphate, and the like. These may be used alone or in combination of two or more. Of these, phosphoric acid, disodium hydrogen phosphate, sodium dihydrogen phosphate, trisodium phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, and tripotassium phosphate are preferably selected.

  The anionic surfactant used in the foamy fluorine coating agent of the present invention is not particularly limited, and examples thereof include natural or synthetic higher fatty acid salts, alkyl sulfates, carboxylic acids, amino acids, and sulfosuccinic acids. And phosphoric acid surfactants. Alkyl sulfate-based, amino acid-based, and sulfosuccinic acid-based surfactants are preferably selected. The blending amount is 0.2 to 5.0% by mass, preferably 0.3 to 3% by mass, and more preferably 0.3 to 1% by mass. If the blending amount is less than 0.2% by mass, good quality foam cannot be obtained, and if it exceeds 5% by mass, the oral tissue is strongly stimulated and the flavor is impaired.

Among them, as the alkylsulfuric surfactant, sulfuric acid having an alkyl group having 8 to 18 carbon atoms and a salt thereof, the salt of which is an alkali metal salt such as sodium or potassium or a salt of triethanolamine is selected. .
Specific examples include sodium lauryl sulfate, potassium lauryl sulfate, triethanolamine lauryl sulfate, ammonium lauryl sulfate, sodium octyl sulfate, sodium decyl sulfate, sodium myristyl sulfate, and sodium cetyl sulfate.
Among these, sodium decyl sulfate, potassium decyl sulfate, sodium lauryl sulfate, and potassium lauryl sulfate are particularly preferable. In the case of these alkyl sulfate compounds, those having a distribution in the alkyl chain length may be used.

As the amino acid surfactant, an amino acid having a saturated or unsaturated acyl group having 8 to 18 carbon atoms and a salt thereof, wherein the salt is an alkali metal salt such as sodium or potassium, or a triethanolamine salt is selected. .
Specifically, N-acyl glycine and its salts such as coconut oil fatty acid glycine potassium, acyl sarcosine and its salts such as octanoyl sarcosine sodium, decanoyl sarcosine sodium, lauroyl sarcosine sodium, myristoyl sarcosine triethanolamine,
N-octanoyl-N-methyl-β-alanine sodium, N-decanoyl-N-methyl-β-alanine sodium, N-lauroyl-N-methyl-β-alanine sodium, N-palmitoyl-N-methyl-β-alanine N-acyl-N-methyl-β-alanine and its salts such as sodium; N-octanoyl-N-methyltaurine sodium, N-decanoyl-N-methyltaurine sodium, N-lauroyl-N-methyltaurine sodium, N- N-acyl-N-methyltaurine and its salts such as palmitoyl-N-methyltaurine; N-octanoyl-L-glutamate sodium, N-decanoyl-L-glutamate sodium, N-lauroyl-L-glutamate sodium, N-myristoyl -Sodium L-glutamate N-acyl-L-glutamic acid such as potassium N-cocoyl-L-glutamate, triethanol N-lauroyl-L-glutamate, and salts thereof, and the like.
N-acylglycine and its salt, N-acyl sarcosine and its salt, and N-acyl-N-methyl-β-alanine and its salt are preferred, among them N-acylglycine and its salt such as coconut oil fatty acid glycine potassium Is particularly preferred. Moreover, you may use what has distribution in an alkyl chain length. These anionic surfactants can be blended alone or in combination of two or more.

  Furthermore, among the anionic surfactants described above, an anionic surfactant having a chain length of 8 to 11 carbon atoms in the alkyl group and acyl group is the total amount of the anionic surfactant contained in the liquid composition. Of these, 10 to 35% is preferable, and 15 to 25% is more preferable. Furthermore, it is more preferable that the alkyl group and acyl group of the anionic surfactant have 10 carbon atoms. In this case, an anionic surfactant having a specific carbon number may be used, or an anionic surfactant having such a carbon number distribution as to have such a ratio may be used.

The compound having a hydroxyl group used in the foamy fluorine coating agent of the present invention is not particularly limited, but alcohols, polyhydric alcohols, sugars and sugar alcohols, compounds having a polyoxyethylene group, and phenols may be used. To be elected.
The compound having a hydroxyl group to be used is selected from alcohols, polyhydric alcohols, sugars and sugar alcohols, compounds having a polyoxyethylene group, and phenols, for example, alcohols such as ethyl alcohol and isopropyl alcohol; glycerin , Ethylene glycol, propylene glycol, 1,3-butylene glycol, polyethylene glycol, polypropylene glycol, polybutylene glycol, polyglycerin and other polyhydric alcohols; sorbitol, xylitol, palatinose, palatinit, erythritol, trehalose, lactitol sugar and sugar alcohol Polyoxyethylene such as polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene polyoxypropylene copolymer, etc. Compounds having a len group; thymol, carvacrol, 3-methyl-4-isopropylphenol, resorcinol, eugenol, isoeugenol, salicylic acid, salicylic acid ester, hydroxybenzoic acid phenols are selected.
Of these, ethyl alcohol, glycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, polypropylene glycol, sorbitol, xylitol, palatinose, palatinit, erythritol, trehalose, polyoxyethylene polyoxypropylene copolymer, Polyoxyethylene sorbitan fatty acid ester and hydroxybenzoic acid ester are selected, and more preferably ethyl alcohol, glycerin, propylene glycol, polyethylene glycol, sorbitol, xylitol, palatinose, palatinit, erythritol, trehalose, polyoxyethylene polyoxypropylene copolymer Coalesced polyoxyethylene sorbitan fatty acid ester, hydroxybenzoic acid ester To be elected.
These are blended in combination of three or more, preferably four or more. When the number of these hydroxyl group-containing compounds is 2 or less, it is impossible to prepare a liquid composition having a viscosity, solubility and usability that can withstand use.

  The total amount is 3 to 17% by mass, more preferably 5 to 15% by mass. Even when the blending amount is less than 3% by mass or exceeds 17% by mass, it is impossible to prepare a liquid composition having a viscosity, solubility and use feeling that can withstand use.

  In addition to the above-mentioned components, the foamy fluorine coating agent of the present invention usually contains components used in oral compositions, for example, surfactants other than those described above, wetting agents, monohydric alcohols, thickeners, fragrances, sweeteners. , PH adjusters, preservatives, pigments and the like can be appropriately blended within a range not impairing the effects of the present invention. However, since the foamed fluorine coating agent of the present invention is used by filling a former container having a porous film, water-insoluble powders such as abrasives that cause clogging of the porous film are not blended.

Other surfactants include amphoteric surfactants such as carboxybetaine, amidebetaine, and sulfobetaine; nonionic surfactants such as polyoxyethylene fatty acid ester; quaternary ammonium salts, amine salts Examples thereof include cationic surfactants of the type, and these can be blended as needed alone or in combination of two or more.
In order to suppress oral irritation low, it is preferable that the amount of the surfactant is small. In this case, the anionic surfactant can be added in an amount of 0.2 to 1% by mass. However, if the nonionic surfactant is not included, a formulation with better foam can be obtained.

  Examples of thickeners include, for example, cellulose derivatives such as carrageenan and carboxymethylcellulose, alkali metal alginates such as sodium alginate, gums such as xanthan gum, tragacanth gum and gum arabic, synthetic binders such as polyvinyl alcohol and sodium polyacrylate, Examples thereof include inorganic binders such as silica gel, aluminum silica gel, and bee gum, and these can be blended alone or in combination of two or more thereof so that the viscosity of the composition at 25 ° C. is 100 cps or less. When it exceeds 100 cps, it becomes difficult for the composition to pass through the porous membrane, and bubbles may not be discharged. The compounding quantity of these thickeners is 0.01-5 mass% normally with respect to the composition whole quantity.

  As a flavoring agent, for example, menthol, carvone, anethole, eugenol, methyl salicylate, limonene, ocimene, n-decyl alcohol, citronell, α-terpineol, methyl acetate, citronenyl acetate, methyl eugenol, cineol, linalool, Examples include ethyl linalool, crocodile, thymol, spearmint oil, peppermint oil, lemon oil, orange oil, sage oil, rosemary oil, cinnamon oil, perilla oil, winter green oil, clove oil, and eucalyptus oil. Or it can mix | blend in combination of 2 or more types. The compounding quantity is 0.05-3 mass% normally with respect to the composition whole quantity, Preferably it is 0.05-1 mass%.

  Furthermore, examples of the sweetening agent include saccharin sodium, acesulfame potassium, stevioside, neohesperidyl dihydrochalcone, glycyrrhizin, perilartin, thaumatin, asparatylphenylalanyl methyl ester, ρ-methoxycinnamic aldehyde, and the like. Can be blended alone or in combination of two or more. The compounding quantity is 0.01-1 mass% normally with respect to the whole composition, Preferably it is 0.05-0.5 mass%.

  The fluorine coating agent of the present invention can be produced by mixing these components and according to an ordinary method, and the obtained composition is filled in a former container having a porous film. The former container filled with the fluorine coating agent of the present invention may be any one as long as it is discharged as a foam by pressurizing the container, mixing the composition with air, and passing the porous film. For example, the method of pressurization includes a squeeze foamer that presses the body of the soft container with fingers, and a pump former that presses the head of a cap equipped with a pump mechanism with fingers.

  Furthermore, the foamy fluorine coating agent of the present invention can be used in a tray method using a dental fluorine tray or the like used in a normal fluoride gel or the like. For example, “This foamy fluorine coating agent is foamed from the former container as described above and is discharged into a dental fluorine tray. Then, the tray is inserted into the oral cavity of the person to be coated, and the tray and teeth are overlapped. It is conceivable to use it lightly for about 1 to 5 minutes.

  The amount of sodium ions in the liquid composition is 2% by mass or less in order to obtain a foamy fluorine coating agent having good property stability that does not cause white turbidity or precipitation even when stored and stored in a low temperature environment for a long time. More preferably. Sodium ions in the entire contents are supplied from raw materials such as various pH adjusters, surfactants and thickeners when preparing the composition. Usually, it is difficult to add no sodium in such a composition. This invention makes the quantity of the sodium ion mix | blended as a whole or less by selecting the raw material to be used when comprising a foam-like composition.

  Next, the present invention will be described in more detail with reference to test examples and examples, but the present invention is not limited thereto. All the compounding quantities in an Example mean the mass%.

Test Example 1: Low-temperature stability, properties, and foaminess evaluation by a compound having a hydroxyl group A liquid composition was prepared from the following components and the components of Examples 1 to 9 and Comparative Examples 1 to 4 shown in Table 1 by a conventional method. Using the following evaluation criteria, the low-temperature stability was evaluated after 5 months at 5 ° C. and left for 1 month, and the properties were evaluated immediately after the preparation. As for the foam, immediately after preparation, after leaving it to stand at room temperature for 1 month, the composition is filled into a foam container, foamed into a foam, discharged into a 100 ml glass, and bulky 5 minutes after discharge. The amount of decrease was evaluated. The results are shown in the lower part of Table 1.

Ingredient Amount (% by mass)
Sodium fluoride 2.0
Phosphoric acid 0.02
Sodium hydrogen phosphate 0.2
Compounds having a hydroxyl group Table 1
Sodium lauryl sulfate Table 1
Sweetener 0.2
Fragrance 0.1
Balance of purified water 100.0

The prepared foamy fluorine coating agent was evaluated for properties, foaminess and low-temperature stability.
Low temperature stability ○: No precipitation was observed
×: Precipitation observed ○: Transparent and uniform liquid after preparation
×: Opaque or non-uniform liquid foam after preparation preparation ○: Bulk reduction rate is 80% or more and 100%
Δ: Bulk reduction rate of 60% or more and less than 80%
X: Comprehensive evaluation with less than 60% reduction in bulk ○: Low-temperature stability, properties, and foam evaluation were all evaluated as ○
Δ: Evaluation of low-temperature stability and properties is ○, and evaluation of bubble stickiness is Δ
X: There was at least one x in each evaluation. A low evaluation in which the overall evaluation was Δ or higher, the low-temperature stability and the properties were passed, and the foam was evaluated as Δ or higher.

  From the results in Table 1, it was found that all of Examples 1 to 9 were stable in properties without causing cloudiness or precipitation at low temperatures. In addition, it was confirmed that the required quality was satisfied even in the case of the foam quality in the evaluation after the properties, preparation and one month at room temperature. On the other hand, in Comparative Examples 1 to 4, it was recognized that white turbidity and precipitation occurred at low temperatures.

Test Example 2: Low-temperature stability, properties, and bubble proof evaluation based on the number of carbon atoms of the alkyl group of the anionic surfactant Prepared by the method and evaluated using the same evaluation as in Test Example 1. The results are shown in the lower part of Table 2.

Ingredient Amount (% by mass)
Sodium fluoride 2.0
Phosphoric acid 0.02
Sodium hydrogen phosphate 0.2
Ethanol 0.5
Glycerin 5.0
Polyethylene glycol 1.0
Methyl paraoxybenzoate 0.1
Butyl paraoxybenzoate 0.1
Sodium alkyl sulfate (the composition of the carbon number of the alkyl group is Table 2) 0.5
Sweetener 0.2
Fragrance 0.1
Purified water balance 100.0

  From the results of Table 2, it can be seen that all of Examples 10 to 14 have stable properties without being clouded or precipitated after being left at a low temperature for 1 month. On the other hand, in Comparative Examples 5 to 8, it was recognized that white turbidity and precipitation occurred at low temperatures, or that the foam was significantly inferior.

Test Example 3: Low temperature stability, properties, foaminess, oral irritation, flavor evaluation by blending amount of anionic surfactant Liquid from each component of Examples 15 to 20 and Comparative Examples 9 to 10 shown in Table 3 below The composition is prepared by a conventional method, and the low temperature stability, properties, and foam are evaluated using the same evaluation as in Test Example 1, and foam texture, oral stimulation, flavor evaluation and comprehensive evaluation are described below. Evaluation was performed using the following evaluation criteria. The results are shown in the lower part of Table 3.

Ingredient Amount (% by mass)
Sodium fluoride 2.0
Phosphoric acid 0.02
Sodium hydrogen phosphate 0.2
Ethanol 0.5
Glycerin 5.0
Polyethylene glycol 1.0
Sodium alkyl sulfate (Example 12) Table 3
Polyoxyethylene polyoxypropylene copolymers Table 3
Polyoxyethylene sorbitan fatty acid ester Table 3
Methyl paraoxybenzoate 0.1
Butyl paraoxybenzoate 0.1
Sweetener 0.2
Fragrance 0.1
Purified water balance 100.0

Bubble texture ○: Uniform and fine
Δ: Large bubbles slightly mixed
×: Oral irritation with a lot of large bubbles ○: No abnormality in oral mucosa
Δ: Degeneration is observed in oral mucosa
×: Flavor standing where peeling of oral mucosa is recognized ○: Flavor standing is good
Δ: Slightly bad flavor
×: Overall evaluation with very poor flavor and enduring actual use ○: All evaluation items were ○
Δ: Evaluation of low-temperature stability and properties is ○, foamy, foam texture, intraoral puncture
There is at least one △ in evaluation of intense and flavor standing
X: There was at least one x in each evaluation. Overall evaluation was △ or higher, low-temperature stability, properties passed, foamy, foam texture, oral irritation and flavor standing evaluated △ or higher. Passed.

  From the results of Table 3, in all of Examples 15 to 20, no fatal problems as products were recognized in the evaluation of low-temperature stability, properties, foaminess, foam texture, oral stimulation, and flavoring. On the other hand, in Comparative Examples 9 to 10, fatal problems were recognized in some evaluation items.

Example 22 A fluorine coating agent was prepared from the following components according to a conventional method, and filled into a pump-type former container having a porous membrane.
Ingredient Amount (% by mass)
Sodium fluoride 2.0
Sodium alkyl sulfate 0.4
(The proportion of C10 sodium alkyl sulfate in the total sodium alkyl sulfate is 17.5%
)
Sodium hydrogen phosphate 0.2
Phosphoric acid 0.05
Propylene glycol 1.5
Concentrated glycerin 5.0
Polyethylene glycol 0.8
Methyl parahydroxybenzoate 0.2
Saccharin sodium 0.1
Fragrance 0.1
Purified water balance 100.0

Reference Example 23 A fluorine coating agent was prepared from the following components according to a conventional method, and filled in a pump-type former container having a porous membrane.
Ingredient Amount (% by mass)
Sodium fluoride 2.0
Hydrofluoric acid 0.3
Sodium lauryl sulfate 1.0
(Sodium lauryl sulfate having a distribution in the alkyl group, the ratio of each carbon number of the alkyl group is 3% for C8 and 1 for C10 with respect to the total amount of sodium lauryl sulfate.
7.5%, C12 is 70%, C14 is 12%)
Polyoxyethylene sulfosuccinate (2 mol) disodium lauryl 1.0
Polyoxyethylene polyoxypropylene copolymer 5.5
Palm oil fatty acid diethanolamide 0.5
Tripotassium phosphate trihydrate 3.0
Tripotassium citrate dihydrate 1.0
Fragrance 1.0
Ethanol 2.5
Sorbit 10.0
Saccharin sodium 0.6
Water balance 100.0

Reference Example 24 A fluorine coating agent was prepared from the following components according to a conventional method, and filled in a pump-type former container having a porous membrane.
Ingredient Amount (% by mass)
Sodium fluoride 2.0
Phosphoric acid 0.03
Dipotassium hydrogen phosphate 0.18
Sodium lauryl sulfate 2.0
(Sodium lauryl sulfate having a distribution in the alkyl group, and the proportion of each carbon number of the alkyl group is 17.5% C10 with respect to the total amount of sodium lauryl sulfate, C
12 is 70%, C14 is 12.5%)
Polyoxyethylene polyoxypropylene copolymer 5.0
Polyoxyethylene sorbitan fatty acid ester 1.0
Glycerin 5.0
Saccharin sodium 0.2
Fragrance 1.0
Water balance 100.0

Example 22 described above is stable in properties without causing cloudiness or precipitation even after being left at 5 ° C. for 1 month, and has a good foam after preparation and at room temperature for 1 month. The mouth irritation and flavoring were good and the feeling was good.

Claims (3)

  In a liquid composition filled in a former container having a porous membrane, the liquid composition contains the following components (A) to (D), and is foamed when discharged from the container: A foamy fluorine coating agent.
(A) Fluoride supplying 0.5-2% by mass of fluoride ion
(B) Phosphate ion 0.01 to 10% by mass
(C) In the carbon number distribution of the constituting alkyl groups, the total abundance ratio of the alkyl groups having 8 and 10 carbon atoms is 9 to 28% by mass with respect to the total constituting alkyl groups. Sodium 0.2-5.0% by mass
(D) 3 or more types selected from the group of compounds having a hydroxyl group consisting of ethyl alcohol, glycerin, propylene glycol, polyethylene glycol, sorbitol, and hydroxybenzoic acid ester (C) is characterized in that, in the carbon number distribution of the constituting alkyl group, the total abundance ratio of the alkyl groups having 8 and 10 carbon atoms is from 17 to 28% by mass with respect to the entire alkyl group constituting. The foamy fluorine coating agent according to claim 1, wherein the amount of sodium alkyl sulfate is 0.2 to 5.0% by mass. The foamy fluorine coating agent according to claim 1, wherein the total amount of (D) is 3 to 7.5% by mass.