JP2015067589A - Foamable composition for washing artificial tooth - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foamable composition for washing artificial tooth having improved hygroscopicity resistance and deliquescent resistance while having foamability.SOLUTION: The invention provides a foamable composition for washing artificial tooth containing a foamable agent, wherein the content of hydrogen carbonate contained as a foamable agent in the composition is 8% by weight or less, and carbonate and citric acid and/or a salt thereof are contained.

Description

  The present invention relates to a denture cleaning foam composition in which moisture absorption and / or deliquescence is significantly suppressed.

  Dentures are treatment means performed for the purpose of making up for missing teeth, and there are various types such as partial dentures and complete dentures. It is desirable that the denture be kept clean in order to keep the oral cavity including the mucous membrane healthy and prevent bad breath. As a means for keeping the denture clean, use of a denture cleanser is suitable, and the denture cleanser is used for the purpose of forming a biofilm on the denture, depositing pigment and plaque, and removing various stains.

  Conventionally, an effervescent denture cleaning tablet has been frequently used as one of denture cleaning agents (Patent Document 1). For example, dentures have been cleaned by immersing the denture in water containing the tablets. It was. In effervescent tablets, sodium bicarbonate, which has a high effervescent power and is inexpensive, has been generally used to improve the effervescent power for the purpose of enhancing visual and physical cleaning effects.

  However, such effervescent tablets are usually individually packaged one by one, and when taken out from the individual package and left in the air, the tablets absorb moisture and deliquesce. Because conventional foaming denture cleaners have these characteristics, we are trying to wrap multiple tablets together instead of individual pills for the purpose of reducing the time and effort of opening, reducing storage space, and reducing costs. However, once opened, inconveniences such as the tablets sticking to each other occur, and it is therefore difficult to package a plurality of tablets together. Furthermore, moisture-absorbing and deliquescent effervescent tablets have many disadvantages such as inactivation of the active ingredients contained in the tablets, deterioration of appearance, and adhesion of the ingredients to the skin when the tablets are touched. It was.

  For this reason, it is important to provide a foaming denture cleaner that is more satisfactory in terms of effects, appearance, handling, and the like, which has improved moisture absorption and deliquescent resistance unlike conventional ones.

JP 2008-050323 A

  An object of the present invention is to provide a denture cleaning agent having improved foam absorption and moisture absorption resistance and deliquescence resistance.

  The inventors of the present invention have made extensive studies in order to solve the above-mentioned problems. As a result, the content of the bicarbonate contained as the foaming agent is 8% by weight or less, and the carbonate and citric acid are combined. Thus, it was found that the moisture absorption resistance and deliquescence resistance of the denture cleaning agent can be remarkably improved while exhibiting the desired foamability. The present invention has been completed as a result of further studies based on this finding, and is as follows.

Item 1. A foaming composition for denture cleaning containing a foaming agent, wherein the content of bicarbonate contained as a foaming agent is 8% by weight or less in the composition, and carbonate, citric acid and / or A foam composition for cleaning dentures, comprising the salt.
Item 2. Item 2. The foaming composition for cleaning a denture according to Item 1, comprising 0.1 to 50 parts by weight of carbonate with respect to 1 part by weight of citric acid and / or a salt thereof.
Item 3. Item 3. The foaming composition for denture cleaning according to Item 1 or 2, wherein the content of citric acid and / or a salt thereof is 1 to 12% by weight.
Item 4. Item 4. The foaming composition for denture cleaning according to any one of Items 1 to 3, wherein the carbonate content in the composition is 0.5 to 50% by weight.
Item 5. Item 5. The foaming composition for denture cleaning according to any one of Items 1 to 4, wherein the total amount of bicarbonate, carbonate, and citric acid and / or a salt thereof in the composition is 2 to 70% by weight.
Item 6. Item 6. The foaming composition for cleaning dentures according to any one of Items 1 to 5, which is substantially free of hydrogen carbonate.
Item 7. Item 7. The foam composition for cleaning dentures according to any one of Items 1 to 6, further comprising a surfactant.
Item 8. Item 12. A denture cleaning method, wherein the denture is brought into contact with water containing the foam composition for cleaning a denture according to any one of items 1 to 7.

  The denture cleaning foam composition of the present invention is excellent in moisture absorption resistance and deliquescence resistance. Further, the denture cleaning foam composition of the present invention has improved moisture absorption resistance and deliquescence resistance, and can exhibit desired foamability.

  Thus, according to the present invention, denture cleaning can be performed effectively because it has the desired foaming property while having moisture absorption and deliquescent resistance. Further, according to the present invention, a desired packaging form can be obtained regardless of the presence of individual packaging of the denture cleaning foam composition, and the change in components and appearance can be greatly reduced even after the packaging is opened. it can. Moreover, according to this invention, when touching the foaming composition for denture cleaning after opening a package, the discomfort and danger, such as a component adhering to skin, can also be reduced.

  Hereinafter, the present invention will be described in more detail.

  The foaming composition for cleaning dentures of the present invention has a bicarbonate content of 8% by weight or less in the composition as a foaming agent, and contains carbonate and citric acid and / or a salt thereof. It is characterized by doing.

  In the present invention, the foaming agent refers to an agent that generates carbon dioxide in the presence of water.

  The bicarbonate used in the present invention is not limited, and examples include conventionally known bicarbonates. For example, as a bicarbonate, a bicarbonate that has been conventionally used as a component of a foaming agent in this field is preferably exemplified. More preferable examples of such a hydrogen carbonate include alkali metal salts of hydrogen carbonate such as sodium hydrogen carbonate and potassium hydrogen carbonate, and further preferable examples include sodium hydrogen carbonate. These may be used alone or in combination of two or more.

  The content of the bicarbonate contained as a foaming agent in the foaming composition for denture cleaning of the present invention is 8% by weight or less in the composition and is not limited as long as the effects of the present invention are obtained. The content of the bicarbonate contained as the foaming agent is preferably 5% by weight or less, more preferably 3% by weight or less, and still more preferably no bicarbonate is contained in the denture cleaning foam composition. Here, substantially not contained may be contained to the extent that does not affect the effect of the present invention, the inclusion of bicarbonate contained as a foaming agent in the denture cleaning foam composition of the present invention The amount is 0 to 1% by weight, preferably 0 to 0.1% by weight in the composition.

  In the present invention, the bicarbonate in the denture cleaning foam composition is preferably 8% by weight or less, preferably 5% by weight or less, more preferably 3% by weight or less, and still more preferably the bicarbonate is substantially Not contained. The fact that it is not substantially contained is explained in the same manner as described above.

  The carbonate used in the present invention is not limited, and examples thereof include conventionally known carbonates. For example, as the carbonate, a carbonate conventionally used as a component of a foaming agent in this field is preferably exemplified. More preferable examples of such carbonates include alkali metal carbonates such as sodium carbonate and potassium carbonate, and sodium carbonate is more preferable. The carbonate may be an anhydride or a hydrate, preferably an anhydride. These may be used alone or in combination of two or more.

  The citric acid and / or salt thereof used in the present invention is not limited and includes conventionally known citric acid and / or salt thereof. For example, in the present invention, citric acid and / or a salt thereof preferably includes citric acid and / or a salt thereof conventionally used as one component of a foaming agent in this field, and examples of the citrate include sodium salt and potassium salt. Alkali metal salts of More preferably, citric acid is exemplified as citric acid and / or a salt thereof. These may be used alone or in combination of two or more.

  In the foam composition for cleaning dentures of the present invention, the blending ratio of bicarbonate to carbonate is not limited as long as the effect of the present invention is obtained, but preferably 1 to 5 parts by weight of carbonate, 0 to 5 bicarbonates. Part by weight is exemplified, more preferably 0 to 3 parts by weight of bicarbonate, and still more preferably 0 to 0.3 parts by weight.

  In the foam composition for cleaning dentures of the present invention, the blending ratio of carbonate and citric acid and / or salt thereof (hereinafter, “citric acid and / or salt thereof” may be referred to as “citric acid or the like” in some cases) Although it is not limited as long as the effect of the present invention is obtained, 0.1 to 50 parts by weight of carbonate is exemplified, preferably 0.1 to 20 parts by weight of carbonate, with respect to 1 part by weight of citric acid and the like. More preferably, 0.1-10 weight part is illustrated, More preferably, 0.5-10 weight part is illustrated, Most preferably, 2-4 weight part of carbonate is illustrated.

  The carbonate content in the denture cleaning foam composition of the present invention is not limited as long as the effect of the present invention is obtained, but is preferably 0.5 to 50% by weight, more preferably 3 to 50% by weight. More preferably, it is 9 to 28% by weight, particularly preferably 14 to 28% by weight.

  Further, the content of citric acid and the like in the foam composition for cleaning dentures of the present invention is not limited as long as the effect of the present invention is obtained, but preferably 1 to 12% by weight, more preferably 3 to 10% by weight, More preferably, 5-8.5 weight% is illustrated.

  The total amount of bicarbonate, carbonate and citric acid is not limited as long as the effects of the present invention can be obtained. Examples of the total amount of the foaming composition for cleaning dentures of the present invention include 2 to 70% by weight. Preferably, 4 to 60 wt% is exemplified, more preferably 4 to 55 wt% is exemplified, and still more preferably 21 to 35 wt% is exemplified. When no bicarbonate is contained, these values can be said to be the total amount of carbonate and citric acid.

  In the present invention, the blowing agent generates carbon dioxide by reacting the hydrogen carbonate and / or the carbonate with the citric acid or the like in water. From this point of view, the foaming agent in the present invention may further contain components that can be used as one component of the foaming agent in this field, as long as the effects of the present invention are not hindered. Examples of such components include sodium sesquicarbonate and acids other than the citric acid. Specific examples of acids include tartaric acid, fumaric acid, malic acid, maleic acid, gluconic acid, succinic acid, salicylic acid, adipic acid, oxalic acid and other organic acids, and alkali metal salts and alkaline earth metal salts thereof. It can be illustrated. These may be used alone or in combination of two or more.

  For example, when the foaming composition for denture cleaning of the present invention further contains an acid other than citric acid or the like as a foaming agent, it is not limited as long as the effects of the present invention are obtained, but citric acid or the like and an acid other than citric acid or the like The carbonate is preferably 0.05 to 50 parts by weight, more preferably 0.1 to 25 parts by weight, and further preferably 0.1 to 5 parts by weight with respect to 1 part by weight of the total amount. 1 to 3 parts by weight is particularly preferred.

  Moreover, in this case, it is not limited as long as the effect of the present invention is obtained. For example, in the foam composition for cleaning dentures of the present invention, the total amount of citric acid or the like and an acid other than citric acid or the like is 1 to 20% by weight. It is preferably exemplified, more preferably 2 to 15% by weight, and further preferably 7 to 15% by weight.

  In this case, the content of acids other than bicarbonate, carbonate, citric acid, and citric acid is not limited as long as the effects of the present invention are obtained. For example, the foaming composition for cleaning dentures of the present invention Among these, the total amount thereof is 2 to 80% by weight, more preferably 5 to 70% by weight, still more preferably 10 to 61% by weight, particularly preferably 26 to 41% by weight. It is. When no bicarbonate is contained, these values can be said to be the total amount of acids other than carbonate, citric acid, and the like, and citric acid and the like.

  By setting it as the foaming agent provided with such a characteristic, it can be set as the foaming composition for denture washing | cleaning which can exhibit desired foaming property, and also the moisture absorption resistance and deliquescent resistance improved notably.

  In the denture cleaning foam composition of the present invention, a surfactant, a chelating agent, an enzyme, a colorant, an antibacterial / bactericidal agent, a fragrance, a sweetener, and a rust preventive agent are further added as necessary without departing from the effects of the present invention. Agent, bleach, anticalculus agent, foam stabilizer, preservative, binder, lubricant, excipient, disintegrant, deodorant, preservative, pH adjuster, oil component, fluidizing agent, etc. An agent may be contained. These additives may be used alone or in combination of two or more. What is necessary is just to set suitably content of these additives according to the objective.

  For example, as an example of a surfactant, it is not limited as long as the effect of the present invention is obtained, and it is not limited to any of cationic, anionic, nonionic and amphoteric surfactants used in conventional denture cleaning. Things can be used.

  Cationic surfactants include quaternary ammonium salts such as alkyl (C6 to C20) trimethylammonium salts, dialkyl (C6 to C20) dimethylammonium salts, and alkyl (C6 to C20) dimethylbenzylammonium salts, alkyl (C6 -C20) amine salt, alkyl (C6-C20) amine ethylene oxide adduct, alkylpyridinium salt and the like. When a cationic surfactant is contained in the denture cleaning foam composition of the present invention, the content of the cationic surfactant is preferably 0.1 to 4% by weight in the denture cleaning foam composition, 0.1 to 2% by weight is more preferable.

  Examples of the anionic surfactant include a linear or branched alkylbenzene sulfonate having an alkyl group having an average carbon number of 8 to 16, an olefin sulfonate having an average of 8 to 20 carbon atoms in one molecule, and an average carbon number. Linear or branched alkyl sulfoacetates having 8 to 20 alkyl groups, alkyl sulfates having an alkyl group having an average carbon number of 8 to 20, and alkane sulfonates having an average of 8 to 20 carbon atoms in one molecule Etc. are exemplified. Although it does not restrict | limit in these, For example, a lauryl group, a myristyl group etc. are illustrated as an alkyl group. When an anionic surfactant is contained in the denture cleaning foam composition of the present invention, the anionic surfactant includes a linear or branched alkylbenzene sulfonate, and an average of 8 to 20 carbon atoms in one molecule. Preferred are olefin sulfonates, linear or branched alkyl sulfoacetates having an alkyl group having an average carbon number of 8 to 20, and alkyl sulfates having an alkyl group having an average carbon number of 8 to 20, preferably 10 to 18 carbon atoms. Linear alkyl benzene sulfonate having an alkyl group, olefin sulfonate having 10 to 18 carbon atoms in one molecule, linear alkyl sulfoacetate having an alkyl group having 10 to 18 carbon atoms, and 10 to 10 carbon atoms More preferred are alkyl sulfates having 18 alkyl groups. Moreover, when an anionic surfactant is contained in the denture cleaning foam composition of the present invention, the anionic surfactant content is 0.1 to 4% by weight in the denture cleaning foam composition. Preferably, 0.5 to 3% by weight is more preferable.

  Nonionic surfactants include higher alcohol ethylene oxide adducts, higher alcohol propylene oxide adducts, alkylphenol ethylene oxide adducts, alkylphenol propylene oxide adducts, fatty acid ethylene oxide adducts, fatty acid propylene oxide adducts, and polyhydric alcohols. Fatty acid ester ethylene oxide adduct, higher alkylamine ethylene oxide adduct, fatty acid amide ethylene oxide adduct, polyethylene glycol type surfactants such as fat and oil ethylene oxide adduct and polypropylene glycol ethylene oxide adduct, and glycerol fatty acid ester, Fatty acid ester of pentaerythritol, fatty acid ester of sorbitol and sorbitan, fatty acid ester of sucrose , Polyhydric alcohol type surfactants such as fatty acid amides of alkyl ethers and alkanolamines of polyhydric alcohols are exemplified. Moreover, when a nonionic surfactant is contained in the foam composition for denture cleaning of the present invention, the content of the nonionic surfactant is 0.1 to 4 weights in the foam composition for denture cleaning. % Is preferable, and 0.5 to 2% by weight is more preferable.

  As an amphoteric surfactant, an amino acid type surfactant such as an alkylaminopropionate having an alkyl group having an average carbon number of 10 to 16 (for example, sodium laurylaminopropionate) or an alkyl group having an average carbon number of 10 to 16 is used. Examples thereof include betaine type surfactants such as alkyldimethylbetaine (lauryldimethylbetaine, stearyldimethylbetaine, etc.), laurylhydroxyethylbetaine, and the like. When the amphoteric surfactant is contained in the denture cleaning foam composition of the present invention, the content of the amphoteric surfactant is preferably 0.1 to 4% by weight in the denture cleaning foam composition, 0.1 to 3% by weight is more preferable.

  In these surfactants, examples of the salt include alkali metal salts such as sodium and potassium, alkaline earth metal salts such as magnesium and calcium, acid addition salts such as ammonium salts, amine salts and hydrochlorides, and the like. Is exemplified by the sodium salt.

  Among these surfactants, anionic surfactants and nonionic surfactants are preferable, and anionic surfactants are more preferable from the viewpoint of obtaining a good cleaning effect.

  These surfactants can be used alone or in combination of two or more.

  Further, for example, the chelating agent is not limited as long as the effect of the present invention is obtained. For example, ethylenediaminetetraacetic acid and / or a salt thereof, polyphosphoric acid and / or a salt thereof (for example, tetrasodium pyrophosphate, sodium dihydrogen pyrophosphate, etc.) Etc. are exemplified.

  For example, the enzyme is not limited as long as the effect of the present invention is obtained, and examples thereof include protease, alcalase, amylase, lipase, dextranase, mutanase, glucanase and the like.

  For example, the colorant is not limited as long as the effect of the present invention is obtained, and examples thereof include synthetic dyes such as various tar dyes such as blue and yellow, lake dyes such as blue lake and yellow tartrazine lake, and natural dyes. .

  For example, the perfume is not limited as long as the effects of the present invention are obtained, and examples thereof include various essential oils such as menthol, salicylic acid, carvone and the like, spearmint, peppermint, peppermint oil and the like.

  The antibacterial / bactericidal agent is not limited as long as the effect of the present invention is obtained, and examples thereof include cationic surfactants, amphoteric surfactants, triclosan, isopropylmethylphenol, chloroxylenol, and thymol.

  Examples of cationic surfactants that can be blended as antibacterial / bactericidal agents include alkyl trimethylammonium chlorides such as stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, and behenyltrimethylammonium; stearyltrimethylammonium bromide, behenyltrimethylammonium bromide Alkyldimethylammonium bromide such as distearyldimethylammonium chloride, dicocoyldimethylammonium chloride, dioctyldimethylammonium chloride, etc .; di (POE) oleylmethylammonium (2EO) chloride; tetradecyldimethylbenzylammonium chloride, Alkyldimethylbenzylammonium chlorides such as thetayldimethylbenzylammonium chloride; benzalkonium chloride, alkylbenzalkonium chloride, alkyldimethylbenzalkonium chloride, benzethonium chloride, lanolin-derived quaternary ammonium salts, stearic acid diethylaminoethylamide, stearic acid Examples include dimethylaminopropylamide, amidopropyldimethylhydroxypropylammonium chloride, stearoylcholaminoformylmethylpyridinium chloride, cetylpyridinium chloride, tall oil alkylbenzylhydroxyethylimidazolinium chloride, benzylammonium salt and the like.

  Examples of amphoteric surfactants that can be formulated as antibacterial / bactericidal agents include glycine-type amphoteric surfactants such as alkylaminoethylglycine and its hydrochloride, alkyldi (aminoethyl) glycine and its hydrochloride; N-lauroyl-N′- Hydroxyethyl-N′-carboxymethylethylenediamine sodium, N-oleyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine sodium, N-cocoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine sodium, N-lauroyl -N'-hydroxyethyl-N'-carboxymethylethylenediamine potassium, N-oleyl-N'-hydroxyethyl-N'-carboxymethylethylenediamine potassium, N-lauroyl-N-hydroxyethyl-N'-carbo Cymethylethylenediamine sodium, N-oleyl-N-hydroxyethyl-N′-carboxymethylethylenediamine sodium, N-cocoyl-N-hydroxyethyl-N′-carboxymethylethylenediamine sodium, N-lauroyl-N-hydroxyethyl-N ′ , N′-dicarboxymethylethylenediamine monosodium, N-oleyl-N-hydroxyethyl-N ′, N′-dicarboxymethylethylenediamine monosodium, N-cocoyl-N-hydroxyethyl-N ′, N′-dicarboxy Methylethylenediamine monosodium, N-lauroyl-N-hydroxyethyl-N ′, N′-dicarboxymethylethylenediamine disodium, N-oleyl-N-hydroxyethyl-N ′, N′-dicarboxyme Carboxymethylamine-type amphoteric surfactants such as sodium ethylenediamine disodium, N-cocoyl-N-hydroxyethyl-N ′, N′-dicarboxymethylethylenediamine disodium; 2-undecyl-N, N, N- (hydroxyethyl) Ixazoline-type amphoteric surfactants such as carboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy disodium salt; alkyls such as lauryldimethylaminoacetic acid betaine and myristylbetaine Betaine-type amphoteric surfactant; palm oil fatty acid amidopropyl dimethylaminoacetic acid betaine, palm kernel fatty acid amidopropyl dimethylaminoacetic acid betaine, beef tallow fatty acid amidopropyl dimethylaminoacetic acid betaine, hardened beef tallow fatty acid amide pro Pyrdimethylaminoacetic acid betaine, lauric acid amidopropyldimethylaminoacetic acid betaine, myristic acid amidopropyldimethylaminoacetic acid betaine, palmitic acid amidopropyldimethylaminoacetic acid betaine, stearic acid amidopropyldimethylaminoacetic acid betaine, oleic acid amidopropyldimethylaminoacetic acid betaine Amidobetaine-type amphoteric surfactants; alkylbetaine-type amphoteric surfactants; alkylamidobetaine-type amphoteric surfactants; alkylsulfobetaine-type amphoteric surfactants such as coconut oil fatty acid dimethylsulfopropylbetaine; amidosulfobetaine-type amphoteric Surfactant; Hydroxysulfobetaine-type amphoteric surfactant such as lauryldimethylaminohydroxysulfobetaine; Carbobetaine-type amphoteric surfactant; Aminocarbo Acid type amphoteric surfactants; phosphobetaine type amphoteric surfactants such as lauryl hydroxy phosphobetaine is exemplified.

  As binders, polyvinylpyrrolidone, poly (oxyethylene) (molecular weight 20,000 to 500,000), polyethylene glycol (molecular weight about 1000 to 50,000), carbowax (molecular weight 4,000 to 20,000) Nonionic surfactants, sodium carboxymethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, cellulose, gelatin, clay, and sugars such as lactose, glucose and xylitol are exemplified.

  Examples of lubricants include sodium benzoate, talc and magnesium stearate, and examples of excipients include sorbitol and sodium sulfate.

  The foam composition for cleaning dentures of the present invention may be in any form depending on the purpose. Examples of the foam composition for cleaning dentures of the present invention include solid forms such as tablets, granules, granules, powders, and pills. The size and shape of the denture cleaning foam composition of the present invention may be arbitrarily set as long as the effects of the present invention are obtained.

  The foam composition for cleaning dentures of the present invention is formulated into the desired form, size, and shape by mixing the above-mentioned components and additives and granulating, tableting, etc. as necessary according to known procedures. Manufactured by.

  In the present invention, denture cleaning is performed by bringing water containing the foam composition for cleaning dentures of the present invention into contact with the dentures. Although it will not restrict | limit as long as the water containing the foam composition for denture cleaning of this invention and a denture contact, From a viewpoint of wash | cleaning a denture effectively, the whole denture is the water containing the foam composition for denture cleaning of this invention It is preferable to make it contact so that it may immerse in. The contact may be performed by adding the denture after adding the denture cleaning foam composition of the present invention to water, and further adding the denture cleaning foam composition of the present invention after adding the denture to water. You may implement by throwing in.

  The water used is not limited, and examples thereof include tap water, purified water, deionized water, and physiological saline. Although the temperature of the water to be used is not limited, a range of 5 to 30 ° C. is preferably exemplified from the viewpoint of more effectively cleaning the denture. Further, in the denture cleaning, the amount of the denture cleaning foam composition of the present invention and the amount of water used is not limited, and may be set as appropriate according to the degree of stain on the denture, and is not limited as long as the effect of the present invention is obtained. However, 1 to 20 g, preferably 1 to 10 g of the denture cleaning foam composition of the present invention is used for about 70 to 200 ml of water. The foaming composition for cleaning dentures of the present invention substantially undergoes foaming when poured into water.

  After the denture cleaning foam composition of the present invention is put into water, the pH of the solution when the denture cleaning foam composition is no longer recognized in water is not limited as long as the effect of the present invention is obtained. The pH of the solution is exemplified by 6-9.

  Also, the time for contacting the denture with water containing the foam composition for cleaning dentures of the present invention is not limited as long as the effect of the present invention is obtained, but for example 5 minutes to 12 hours, more preferably 30 minutes to 8 hours. And may be set as appropriate depending on the stain of the denture. Moreover, the usage frequency of the foam composition for denture cleaning of this invention is not restrict | limited similarly, What is necessary is just to set suitably.

  From this, this invention provides the denture cleaning method characterized by making water and denture contact the water containing the foam composition for denture cleaning of this invention. The method is not limited as long as the denture is brought into contact with water containing the foam composition for denture cleaning according to the present invention, and the embodiment is as described above.

  As described above, the denture cleaning foam composition of the present invention is excellent in moisture absorption resistance and deliquescence resistance. Further, the denture cleaning foam composition of the present invention has improved moisture absorption resistance and deliquescence resistance, and can exhibit desired foamability. Therefore, the present invention further provides dentures characterized in that the content of bicarbonate in the foaming composition for denture cleaning is 8% by weight or less, and carbonates and citric acid and / or salts thereof are used. A method for suppressing moisture absorption and / or deliquescence of a cleaning foam composition is provided. The bicarbonate, carbonate, citric acid and / or salt thereof, further additives, weight ratio and amount of each component, etc. used in the method are explained in the same manner as described above.

  According to the present invention as described above, moisture absorption resistance and deliquescence resistance can be remarkably improved in the denture cleaning foam composition. Moreover, according to this invention, in a foam composition for denture washing | cleaning, moisture absorption resistance and deliquescence resistance are improved, and also desired foamability can be exhibited. Thus, according to the present invention, it is possible to exhibit a desired detergency while having moisture absorption and deliquescence resistance, and the foam composition for denture cleaning can be in a desired packaging form with or without individual packaging, Furthermore, even after the package has been opened, alteration of the components and unpleasant appearance can be significantly reduced. Moreover, according to this invention, when touching the foam composition for denture washing | cleaning, the discomfort and danger, such as a component adhering to skin, can also be reduced.

  Hereinafter, the present invention will be described more clearly using examples and test examples. However, the present invention is not limited to such examples and test examples.

Test example 1
1-1. Preparation of foaming composition for cleaning dentures, evaluation procedure Each component is mixed according to the composition shown in Table 1, and tableted at 3 MPa using a mold with a diameter of 17φ to give a tablet form of 2.56 g per piece A denture cleaning foam composition (Examples 1 and 2) and a comparative composition (Comparative Example 1) were prepared.

  In addition, it is as follows about the component used in producing each composition. Sodium bicarbonate Sodium bicarbonate, manufactured by Tokuyama; Citric acid Product, citric acid (anhydrous), Showa Kako, sodium carbonate, Sodium soda ashlite, manufactured by Tokuyama; Malic acid, Malic acid Fuso S, Fuso Chemical Industry Co., Ltd .; sodium lauryl sulfoacetate, trade name LATHANOL LALPOWDER, manufactured by Stepan Company; sodium sulfate trade name, neutral anhydrous sodium sulfate A6, manufactured by Shikoku Kasei Co., Ltd .; Sorbitol Product name Partec SI450, manufactured by Merck & Co., Inc.

  The foaming power of each composition of Examples 1 and 2 and Comparative Example 1 was evaluated. Specifically, 1 tablet of the obtained composition was gently put into a 200 ml graduated cylinder containing 75 ml of water at 25 ° C., and the upper and lower ends of the foam after 5 minutes were marked on the graduated cylinder. The volume of was measured. When the volume of the foam was 5 ml or more, ◎, 3 ml or more were evaluated as ○, 2 ml or more as Δ, and less than 2 ml as x. The volume of the foam increases when the amount of carbon dioxide generated by the foaming agent is large, and decreases when the volume is small. Therefore, the foamability of the foam composition for denture cleaning can be quantitatively evaluated.

  Separately from this, each composition obtained as described above was left in the air for 45 minutes at 25 ° C. and 60% humidity, and then the moisture absorption and deliquescence states of each composition were as follows: O and x were visually evaluated in three stages.

<Evaluation criteria for moisture absorption and deliquescence>
◎ There is no change in the appearance of the composition.
○ There is a slight change in the appearance of the composition (a state in which bubbles are slightly observed on the surface of the composition).
X The appearance of the composition is clearly changed, or the original composition (tablet) is not retained.

  Each composition was tested three times.

1-2. The evaluation result is shown in Table 1.

  As is clear from Table 1, Comparative Example 1 containing a large amount of sodium hydrogen carbonate, like the conventional foaming denture cleaner, showed good foaming power, but in Comparative Example 1, when exposed to air. The moisture resistance and deliquescence resistance were remarkably inferior. On the other hand, in Examples 1 and 2, no change was observed in the appearance even when exposed to air, or a slight change was observed, indicating that the moisture absorption resistance and deliquescence resistance are high. It was. In Examples 1 and 2, good foaming power was also observed.

  From these results, the foam compositions for cleaning dentures of Examples 1 and 2 have been used frequently as foaming agents because of their high foamability, and the content of sodium hydrogen carbonate contained in the foam composition is remarkable. It was found that the moisture absorption and deliquescence resistances were significantly improved while maintaining good foaming power despite being reduced or not contained.

Test example 2
2-1. Preparation and Evaluation Procedure of Denture Cleaning Foaming Composition Similar to Test Example 1, each component shown in Table 2 was mixed and tableted to give 2.56 g of the foaming composition for denture cleaning ( Examples 3 to 11) were prepared. About each obtained composition, the foaming power was evaluated by the same method as in Test Example 1. Separately, the compositions of Examples 3 to 11 were left in the air for 45 minutes under the conditions of 25 ° C. and 60% humidity, and the moisture absorption and deliquescence properties were evaluated in the same manner as in Test Example 1. Each composition was tested three times.

2-2. The evaluation result is shown in Table 2.

  As is clear from Table 2, also in Examples 3 to 11 that do not contain sodium hydrogencarbonate, sufficient foaming power was observed, and the appearance was not changed even when exposed to air, or a slight change. It was found that the moisture absorption resistance and deliquescence resistance were high.

  From these results, even the foaming compositions for cleaning dentures of Examples 3 to 11 conventionally do not contain sodium bicarbonate, which is frequently used as a foaming agent because of its high foamability. Nevertheless, it was found that the moisture absorption resistance and deliquescence resistance were improved while maintaining good foaming power.

Prescription Example Hereinafter, each component was mixed according to the composition shown in the prescription example, and a foaming composition for denture cleaning in the form of a tablet was prepared in the same manner as in Test Example 1. In any foaming composition for denture cleaning, moisture absorption resistance And excellent deliquescent resistance and sufficient foaming power.

Claims (7)

A foaming composition for denture cleaning containing a foaming agent, wherein the content of bicarbonate contained as a foaming agent is 8% by weight or less in the composition, and carbonate, citric acid and / or A foam composition for cleaning dentures, comprising the salt. The foaming composition for denture washing | cleaning of Claim 1 containing 0.1-50 weight part of carbonate with respect to 1 weight part of citric acid and / or its salt. The foaming composition for denture cleaning according to claim 1 or 2, wherein a content of citric acid and / or a salt thereof in the composition is 1 to 12% by weight. The foaming composition for denture cleaning in any one of Claims 1-3 whose content of carbonate in the said composition is 0.5-50 weight%. The foaming composition for denture cleaning according to any one of claims 1 to 4, wherein a total amount of hydrogen carbonate, carbonate, citric acid and / or a salt thereof in the composition is 2 to 70% by weight. The foaming composition for denture cleaning according to any one of claims 1 to 5, wherein the composition is substantially free of hydrogen carbonate. A denture cleaning method, wherein the denture is brought into contact with water containing the foam composition for cleaning a denture according to any one of claims 1 to 6.