JP5235267B2 - Aqueous fragrance composition - Google Patents

Description

  The present invention relates to an aromatic component alteration inhibitor comprising a combination of a weak acid alkali metal salt, an alkali metal compound and a weak acid, and an aqueous fragrance composition containing the alteration inhibitor.

  Conventionally, as a fragrance used in a living room or a washroom of a general household, a stationary type such as a liquid preparation or a gel preparation has been widely used. These fragrances are generally premised on long-term use with a use period of one month or longer. Some fragrance components blended with fragrances are altered by long-term use and temperature changes, and fragrances with little change in fragrance have been sought after long-term use and storage.

  Therefore, in order to solve this problem, a method has been adopted in which an antioxidant is added to prevent the aroma component from being altered. Among the antioxidants, BHT (dibutylhydroxytoluene) is most widely used, and tocotrienol and plant-derived antioxidants have been used (for example, Patent Documents 1, 2, and 3). etc). However, these antioxidants alone are not sufficient to suppress the deterioration of the fragrance component caused by use or temperature change.

In addition, it has been known so far to exert a deodorizing action by combining organic acids and weak alkali agents (for example, Patent Documents 4 to 7), but a combination of organic acids and weak alkali agents is used. It has not been known that deterioration of the fragrance component is suppressed by using the
JP 2000-336355 A JP 06-108087 A JP 09-183955 JP 2002-000711 A JP 2002-306583 A JP2002-336338 JP 06-219928

  The present invention includes an aromatic component alteration inhibitor capable of preventing deterioration of an aromatic component due to long-term use or temperature change, and the alteration inhibitor, and the aromatic component is retained without being altered for a long period of time. The main objective is to provide an aqueous fragrance composition to be obtained.

  As a result of diligent research, the present inventors have found that in an aqueous fragrance composition, (1) an alkali metal salt of a weak acid having a pKa of 4 to 8; (2) an alkali metal salt of a weak acid having a pKa of 4 to 8, pKa The deterioration of the fragrance component is suppressed by blending any one of the components represented by at least two or more selected from the group consisting of a weak acid of 4 to 8 and an alkali metal compound exhibiting strong basicity. I found. The present invention has been completed as a result of further research based on such findings.

The present invention provides the following fragrance component alteration preventing agent, aqueous fragrance composition, and fragrance component alteration prevention method.
Item 1. An aromatic component alteration preventing agent comprising as an active ingredient the following component (1) or (2):
(1) (i) an alkali metal salt of a weak acid having a pKa of 4-8 (2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (ii) a weak acid having a pKa of 4-8, and (iii) At least two or more selected from the group consisting of alkali metal compounds exhibiting strong basicity.
Item 2. Item 2. The alteration inhibitor according to Item 1, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5.
Item 3. Item 2. The alteration preventing agent according to Item 1, wherein the weak acid represented by (i) or (ii) is a combination of a weak acid having a pKa of 7.5 or more and 7.5 or less and a weak acid having a pKa of 5 or more and less than 6.
Item 4. Aqueous fragrance composition comprising a fragrance component and an alteration preventing component shown in either (1) or (2) below:
(1) (i) an alkali metal salt of a weak acid having a pKa of 4-8 (2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (ii) a weak acid having a pKa of 4-8, and (iii) At least two or more selected from the group consisting of alkali metal compounds exhibiting strong basicity.
Item 5. Aqueous fragrance composition comprising a fragrance component and an alteration preventing component shown in any of (1) or (2a) to (2c) below:
(1) a combination of (i) a weak acid having a pKa of 4 to 8 (2a) (ii) a weak acid having a pKa of 4 to 8 and (iii) an alkali metal compound exhibiting strong basicity (2b) (i A combination of a weak acid having a pKa of 4 to 8 and (ii) a weak acid having a pKa of 4 to 8 (2c) (i) an alkali metal salt of a weak acid having a pKa of 4 to 8; (ii) a pKa of 4 A combination of ˜8 weak acids and (iii) an alkali metal compound exhibiting strong basicity.
Item 6. Item 6. The aqueous fragrance composition according to Item 4 or 5, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5.
Item 7. Item 6. The aqueous fragrance composition according to Item 4 or 5, wherein the weak acid represented by (i) or (ii) is a combination of a weak acid having a pKa of 6 or more and 7.5 or less and a weak acid having a pKa of 5 or more and less than 6.
Item 8. Item 6. The aqueous fragrance composition according to Item 4 or 5, wherein the weak acid is any one or more selected from the group consisting of carbonic acid, phosphoric acid, citric acid, malic acid, succinic acid, and pyrophosphoric acid.
Item 9. The alkali metal salt shown in (i) is at least one selected from the group consisting of sodium carbonate, sodium hydrogen carbonate and sodium dihydrogen pyrophosphate, and the weak acid shown in (ii) is citric acid. Item 5. The aqueous fragrance composition according to Item 4, which is an acid.
Item 10. Item 4-9, wherein the alteration-preventing component shown in either (1) or (2) is contained in a total amount of 0.05 to 0.9% by weight relative to the total weight of the aqueous fragrance composition. The aqueous fragrance composition according to any one of the above.
Item 11. The aromatic component is octanal, decanal, citral, citronellal, piperonal, vanillin, hydroxycitronellal, isocyclocitral, ethyl 2-methylbutyrate, 3-methylbutyl acetate, benzyl acetate, geranyl acetate, citronellyl acetate, linalyl Acetate, menthyl acetate, bornyl acetate, isobornyl acetate, phenylethyl acetate, terpenyl acetate, dipentene, limonene (p-Mentha-1,8-diene), terpinolene (p-Mentha-1,4 (8)) -Diene), α-terpinene, myrcene (7-methyl-3-methylene-1,6-octadiene) and β-pinene (Nopinene). Item 11. The aqueous fragrance composition according to Item 4 to 10, which is at least one of the above.
Item 12. Any 4 of paragraphs in which the fragrance component is a mixed flavor of limonene and at least one selected from the group consisting of octanal, decanal, citral, citronellal, piperonal, vanillin, hydroxycitronellal and isocyclocitral. 10. The aqueous fragrance composition according to 10.
Item 13. A method for preventing deterioration of an aromatic component, comprising adding the anti-deterioration component shown in either (1) or (2) below to an aqueous fragrance composition containing the aromatic component:
(1) (i) an alkali metal salt of a weak acid having a pKa of 4-8 (2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (ii) a weak acid having a pKa of 4-8, and (iii) At least two or more selected from the group consisting of alkali metal compounds exhibiting strong basicity.
Item 14. Item 14. The method for preventing alteration according to Item 13, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5.
Item 15. Item 14. The method for preventing deterioration according to Item 13, wherein the weak acid represented by (i) or (ii) is a combination of a weak acid having a pKa of 6 or more and 7.5 or less and a weak acid having a pKa of 5 or more and less than 6.
Item 16. The total amount of the aqueous fragrance composition is characterized by adding 0.05 to 0.9% by weight of the total amount of the anti-altering component shown in either (1) or (2) above, Item 16. The method for preventing alteration according to any one of Items 13 to 15.

  In the present invention, “deterioration of the fragrance component” refers to both qualitative changes in which the fragrance is subjected to chemical modification / decomposition and changes in fragrance or quantitative changes in which the fragrance disappears.

1. Fragrance component alteration inhibitor The fragrance component alteration inhibitor of the present invention is:
(1) (i) an alkali metal salt of a weak acid having a pKa of 4-8 (2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (ii) a weak acid having a pKa of 4-8, and (iii) It is characterized by using as an active ingredient at least two or more components selected from the group consisting of strongly basic alkali metal compounds.

(I) Alkali metal salt In the present invention, the alkali metal salt is a weak acid having a pKa of 4 to 8 described in detail in (ii) below, and an alkali metal such as lithium, sodium, potassium, rubidium, cesium, frangium, etc. Refers to salt. Examples of the alkali metal salt used in the present invention include organic acid salts of alkali metals (for example, fruit acid (alphahydroxy acid) salts, pyrophosphates, etc.), inorganic acid salts (for example, carbonates, bicarbonates, phosphorus Acid salts, etc.), for example, sodium carbonate, potassium carbonate, lithium carbonate, sodium bicarbonate, potassium bicarbonate, sodium citrate, potassium citrate, sodium succinate, potassium succinate, sodium malate, malic acid Examples include potassium, sodium pyrophosphate, sodium dihydrogen pyrophosphate, sodium monohydrogen pyrophosphate, sodium tripolyphosphate, potassium tripolyphosphate, and the like. Among these alkali metal salts, carbonates and fruit acid (alpha hydroxy acid) salts are preferable in consideration of the influence on the natural environment, such as sodium carbonate, potassium carbonate, sodium hydrogen carbonate, sodium citrate, sodium malate, Sodium succinate etc. are mentioned, More preferably, sodium carbonate and sodium hydrogencarbonate are mentioned. These alkali metal salts can be used alone or in combination of two or more.

(Ii) Weak acid In the present invention, the weak acid has a pKa of about 4 to 8, and is blended with the above (i) alkali metal salt or (iii) alkali metal compound described later to exhibit the effect of preventing deterioration of the aromatic component. If it is a thing, it will not specifically limit, What is normally used by cosmetics, daily necessities, daily necessities, etc. can be used. Examples of such weak acids include malic acid (pKa 5.05), citric acid (pKa 5.72), succinic acid (pKa 5.61), carbonic acid (pKa 6.35), phosphoric acid (pKa 7.2), and pyrophosphoric acid. Organic acids such as (pKa6.76) and tripolyphosphoric acid (pKa6.5), inorganic acids and the like can be mentioned, and citric acid, succinic acid and carbonic acid are preferable. These weak acids can be used alone or in combination of two or more.

  Among these, it is desirable to use a weak acid having a pKa of about 6 to 7.5, and more preferably about a pKa of 6 to 7 in order to exhibit a superior effect of preventing deterioration of the fragrance component. Examples of such weak acids include carbonic acid and phosphoric acid. Furthermore, carbon dioxide is more preferable in consideration of the influence on the natural environment.

  Further, by combining a weak acid in the vicinity of pKa7 (for example, about pKa6 to 7.5, preferably about pKa6.5 to 7) and a weak acid of about pKa5 to less than 6, preferably about pKa5 to 5.5, It can be expected to have a better effect of preventing deterioration of aroma components. Examples of the weak acid having a pKa of about 6 or more and 7.5 or less include carbonic acid, phosphoric acid, pyrophosphoric acid, tripolyphosphoric acid, and the like. Moreover, examples of the weak acid having a pKa of 5 or more and less than 6 include malic acid, citric acid, succinic acid, and the like, and citric acid is more preferable in consideration of the saliency prevention effect and supply ability of the aromatic component. Therefore, for example, by using a combination of carbonic acid and citric acid, it is possible to expect a better effect of preventing deterioration of the aromatic component.

  In addition, when the deterioration inhibitor of the fragrance component of the present invention comprises, for example, (i) an alkali metal salt of a weak acid of pKa4 to 8 and (ii) a weak acid of pKa4 to 8, the weak acid shown in (i) , At least one selected from the group consisting of phosphoric acid and pyrophosphoric acid, and the weak acid shown in (ii) is at least any one selected from the group consisting of citric acid, malic acid and succinic acid It is preferable that the weak acid of (i) is carbonic acid, and it is more preferable that the weak acid of (ii) is citric acid.

(Iii) Alkali metal compound In the present invention, an alkali metal compound is a compound containing an alkali metal element such as lithium, sodium, potassium, rubidium, cesium, frangium, etc., and releases an alkali metal ion in the presence of water. Point to. Moreover, the alkali metal compound used in the present invention is not particularly limited as long as it is soluble in water and exhibits strong basicity when dissolved in water. In the present invention, the term “alkali metal compound exhibiting strong basicity” refers to an alkali metal compound having a solution pH of 11.5 or more when 0.1 mol is dissolved in 1 L of water at 25 ° C.

  Examples of such alkali metal compounds include alkali metal hydroxides, alkoxides, and the like, such as sodium hydroxide, potassium hydroxide, sodium methoxide, potassium t-butoxide, etc., preferably sodium hydroxide, Potassium hydroxide and the like. These alkali metal compounds can be used alone or in combination of two or more.

Constitution of Fragrance Component Alteration Agent The above (i) alkali metal salt can be used alone as the alteration inhibitor of the fragrance component of the present invention (embodiment shown in (1) above), (i) alkali metal Two or more kinds of salts, (ii) weak acids, and (iii) alkali metal compounds exhibiting strong basicity can be used in combination (the embodiment shown in (2) above).

Moreover, as a preferable embodiment of the present invention, there is an aromatic component alteration preventing agent containing as an active ingredient any of the following components (1) or (2a) to (2c):
(1) (i) a weak acid alkali metal salt having a pKa of 4 to 8 (2a) (ii) a weak acid having a pKa of 4 to 8 and (iii) a combination of alkali metal compounds exhibiting strong basicity (2b) (i A combination of a weak acid having a pKa of 4-8 and (ii) a combination of a weak acid having a pKa of 4-8 (2c) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (ii) a pKa of 4 A combination of ˜8 weak acids and (iii) an alkali metal compound exhibiting strong basicity.

  Among the above (1) and (2a) to (2c), the most preferable embodiment as the alteration inhibitor for the fragrance component of the present invention is an embodiment using the component shown in (2b) as an active ingredient. In particular, when the anti-deterioration agent of the present invention is applied to an aqueous fragrance composition, the effects of the present invention can be remarkably exhibited by adopting the above aspect (2b). Further, when adopting the above aspect (2b), (i) the alkali metal salt is at least one selected from the group consisting of sodium carbonate, sodium hydrogen carbonate and sodium dihydrogen pyrophosphate, And (ii) the weak acid is particularly preferably citric acid.

  When the component shown in (2) above is employed as an active ingredient, the compounding ratio of (i) to (iii) is not particularly limited as long as it can exert the effect of preventing deterioration of the fragrance component. For example, the above (2a) to (2c) The preferred combinations of (i) to (iii) shown in (1) are as follows.

  When the anti-altering agent for an aromatic component of the present invention comprises a combination of (ii) a weak acid having a pKa of 4 to 8 shown in (2a), and (iii) an alkali metal compound exhibiting strong basicity, (ii) ) And (iii), (iii) is about 0.25 to 200 parts by weight, preferably about 1 to 200 parts by weight, more preferably 2 to 100, when (iii) is 1 part by weight. About parts by weight.

  When the aromatic component alteration inhibitor of the present invention comprises a combination of (i) an alkali metal salt of a weak acid having a pKa of 4 to 8 and (ii) a weak acid having a pKa of 4 to 8 as shown in (2b) above. The mixing ratio of (i) and (ii) is that when (ii) is 1 part by weight, (i) is about 0.2 to 10 parts by weight, preferably about 0.5 to 8 parts by weight, more preferably Is about 0.7 to 3 parts by weight.

  The aromatic component alteration preventing agent of the present invention comprises (i) an alkali metal salt of a weak acid having a pKa of 4 to 8, (ii) a weak acid having a pKa of 4 to 8, and (iii) In the case of a combination of alkali metal compounds exhibiting basicity, the compounding ratio of (i), (ii) and (iii) is 0.1 to 5 weights when (i) is 1 part by weight. Part, preferably about 0.2 to 2 parts by weight, more preferably about 0.3 to 1 part by weight, and (iii) is about 0.001 to 1 part by weight, preferably 0.001 to 0.1 part by weight. The degree is more preferably about 0.01 to 0.1 parts by weight.

  The alteration inhibitor of the fragrance component of the present invention obtained by combining the above components (i) to (iii) can be applied to a composition in which the fragrance component is blended mainly for the fragrance effect. It is possible to suppress qualitative and quantitative changes in the odor and maintain the initial fragrance over a long period of time. The composition in which the fragrance component is blended mainly for the above fragrance effect is not particularly limited. Examples include detergents such as body soaps, bathing agents, and antiperspirants. Among these, a fragrance is particularly preferable.

  In any of the cases shown in the above (1) or (2), the aromatic component alteration inhibitor of the present invention is contained in the composition in an amount of about 0.01 to 2% by weight, preferably 0.05 to 0.9. By blending about wt%, more preferably about 0.1 to 0.5 wt%, more preferably about 0.15 to 0.25 wt%, the deterioration of the aromatic component due to long-term use, temperature change, etc. It is possible to suppress. At this time, the pH of the composition is desirably adjusted to about 5 to 7.5, preferably about 6 to 7.5, and more preferably about 6.5 to 7.5.

2. Aqueous fragrance composition The present invention provides an aqueous fragrance composition comprising the above-mentioned fragrance component alteration inhibitor and fragrance component.

Fragmentation preventive agent for fragrance component The blending ratio of each component in the aqueous fragrance composition of the present invention is not particularly limited as long as it can exert the effect of preventing deterioration of the fragrance component of the present invention, but is shown in (1) or (2) above. The total amount of the anti-altering component is about 0.01 to 2% by weight, preferably about 0.05 to 0.9% by weight, more preferably about 0.1 to 0.5% by weight, and still more preferably 0.15 It is desirable to blend so as to be about 0.25% by weight. If the total blending amount of each component of the composition shown in the component (1) or (2) is within the above range, it is possible to effectively suppress the deterioration of the fragrance component, and further, the fragrance composition. It is possible to maintain the stability of the preparation without deteriorating the volatile evaporation performance, which is the original function of the product.

Fragrance component The fragrance component used in the aqueous fragrance composition of the present invention is not particularly limited as long as it is a fragrance component used as a raw material for daily necessities. Examples of such fragrance components include aldehydes having 6 to 12 carbon atoms, anisaldehyde, acetal R, acetophenone, acetyl cedrene, adoxal, allyl amyl glycolate, allyl cyclohexane propionate, alpha damascone, amblet lid , Ambroxan, amylcinnamic aldehyde, amylcinnamic aldehyde dimethyl acetal, amyl valericate, amyl salicylate, isoamyl acetate, acetyl eugenol, isoamyl salicylate, indole, α ionone, β ionone, α methyl ionone, β methyl ionone, γ methyl ionone, Indene, ethyl alliline, uranium thiol, oak moss no. 1, Oligorib, Oxyphenylone, Caryophyllene, Kashmelan, Carvone, Galaki Solid, Caron, Coumarin, Paracresyl Methyl Ether, Geraniol, Geranyl Acetate, Geranyl Formate, Geranil Nitrile, Tetrahydrogeraniol, Tetrahydrogeranylacetate, Coabon, Sandaroa, Sandera, Santa Rex, Santa Linol, Methyl Salicylate, Cynamic Alcohol, Cynamic Aldehyde, Cis Jasmon, Citral, Citral Dimethyl Acetal, Citrasal, Citronellal, Citronellol, Citronellyl Acetate, Citronellyl Formate, Citronellil Nitrile, Cyclamet, Cyclamenaldehyde, cyclaprop, cinnamyl acetate, dihydroja Mon, Dimethol, Isocyclocitral, Jasmar, Jasmolactone, Jasmofilan, Stilalylacetate, Stilalyle Propionate, Cedro Amber, Cedrill Acetate, Cedrol, Celestrido, β Damascon, α Turpineol, γ Terpineol , Tarpinyl acetate, thymol, delta damascon, delta C6-C13 lactone, tonalid, traceride, tripral, isononyl acetate, nerol, nerell acetate, neobergamate, nopyl acetate, nopyl alcohol, bacdanol, hyacinth dimethyl Acetal, hydrotropic alcohol, hydroxycitronellal, alpha pinene, butyl butyrate, para tertiary butyl cyclohexanol, para tertiary -Butyl cyclohexyl acetate, ortho-tertiary butyl cyclohexanol, diphenyl oxide, fluate, fenthyl alcohol, phenyl ethyl phenyl acetate, isobutyl quinoline, phenyl ethyl alcohol, phenyl ethyl acetate, phenyl acetoaldehyde dimethyl acetal, benzyl acetate, benzyl alcohol, benzyl Salicylate, bergamyl acetate, benzaldehyde, benzyl formate, dimethylbenzyl carbinol, hedion, helional, heliotropin, cis-3-hexenol, cis-3-hexenyl acetate, cis-3-hexenyl salicylate, hexylcin Namic aldehyde, hexyl salicylate, pentalide, bellodox, Tobornyl acetate, isobornyl acetate, isoborneol, endo-borneol, manzanate, mayolate, mugealdehyde, miracaldehyde, dihydromyrsenol, dimyrcetol, mugor, musk TM-II, musk 781, musk C14, musk T , Musk ketone, musk civetine, musk mosken, mensanil acetate, mentonate, methyl anthranilate, methyl eugenol, menthol, methyl phenyl acetate, eugenol, isoeugenol, methyl isoeugenol, γC6-13 lactone, lime oxide, methyl lavender ketone, dihydro Linalool, ligustral, lyial, limonene, linalool, linalool oxide, tetrahydrolinalol, tetrahydrolina Lille acetate, linalyl acetate, rilal, rubafuran, rosephenone, rose oxide, vanillin, benzoin, perubalsum, trubalsum, octanal, decanal, piperonal, vanillin, hydroxycitronellal, ethyl 2-methylbutyrate, 3-methylbutyl Acetate, linalyl acetate, menthyl acetate, bornyl acetate, terpenyl acetate, dipentene, terpinolene, α-terpinene, myrcene, β-pinene, tuberose oil, mustin tincture, castrium tincture, civet tincture, ambergris tincture, peppermint oil, perilla Oil, petitgrain oil, pine oil, rose oil, rosemary oil, camphor oil, melamine oil, clary sage oil, sandalwood oil, spearmint oil, spike Lavender oil, Star anise oil, Lavandin oil, Lavender oil, Lemon oil, Lemongrass oil, Lime oil, Neroli oil, Oak moss oil, Ocotia oil, Patchouli oil, Thyme oil, Tonka bean tincture, Turpin oil, Vanilla bean tincture, Basil Oil, nutmeg oil, citronella oil, clove oil, bored rose oil, cananga oil, cardamom oil, cassia oil, cedarwood oil, orange oil, mandarin oil, tangerine oil, anise oil, bay oil, coriander oil, elemi oil, eucalyptus oil, Mention may be made of fennel oil, galvanum oil, geranium oil, hiba oil, cocoon oil, jasmine oil, vetiver oil, bergamot oil, ylang ylang oil, grapefruit oil, yuzu oil and the like. These fragrance components may be used singly or in combination with any combination of two or more.

  Among these aromatic components, a compound having an aldehyde group or a compound having an ester group tends to be unstable under high temperature conditions. Therefore, the stability of these compounds can be increased and the deterioration of the fragrance component can be suppressed by blending the anti-deterioration agent of the present invention with the fragrance composition containing these compounds.

  Examples of the fragrance component having an aldehyde group include octanal, decanal, citral, citronellal, piperonal, vanillin, hydroxycitronellal, and isocyclocitral.

  Examples of the aromatic component having an ester group include ethyl 2-methylbutyrate, 3-methylbutyl acetate, benzyl acetate, geranyl acetate, citronellyl acetate, linalyl acetate, menthyl acetate, bornyl acetate, and isobornyl acetate. , Phenylethyl acetate, terpenyl acetate and the like.

  In addition, hydrocarbon-based aromatic components having about 8 to 12 carbon atoms are easily altered by high temperature conditions. Therefore, when preparing an aqueous fragrance | flavor composition using a hydrocarbon-type fragrance | flavor component, it is desirable to mix | blend the alteration inhibitor of the fragrance | flavor component of this invention.

  Examples of such hydrocarbon-based aromatic components include dipentene, limonene (p-Mentha-1,8-diene), and terpinolene (p-Mentha-1,4) as long as they are hydrocarbon-based aromatic components having 10 carbon atoms. (8) -diene), α-terpinene, myrcene (7-methyl-3-methylene-1,6-octadiene), β-pinene (Nopinene) and the like. These hydrocarbon-based aromatic components are added with a hydroxyl group by a hydrolysis reaction, and are particularly susceptible to the quality of the scent. For example, limonene is changed to 3,7-dimethyl-1,6-octadien-3-ol, α-terpineol, and the like by a hydrolysis reaction, thereby changing the fragrance.

  Among these, in particular, when an aromatic component having an aldehyde group and a blended aromatic component containing both limonene are used, the aromatic component having an aldehyde group becomes extremely unstable and easily deteriorates. Along with this, the transformation of limonene is accelerated and it becomes easy to affect the aroma. Therefore, it is particularly preferable to use the fragrance component alteration preventing agent of the present invention for an aqueous fragrance composition containing an aroma component having an aldehyde group and limonene.

  The blending amount of the fragrance component in the aqueous fragrance composition of the present invention is about 0.1 to 10% by weight, preferably about 0.5 to 5% by weight, more preferably about 1 to 3% by weight. Since such a fragrance composition contains a fragrance component at a high concentration, a change in fragrance when the fragrance component is altered is easily perceived. Alteration is suppressed and the initial fragrance can be maintained for a long time even if it contains a fragrance component at a high concentration.

  Moreover, when preparing the fragrance | flavor component which has an aldehyde group or an ester group in the aqueous | water-based fragrance | flavor composition of this invention, the aromatic component which has an aldehyde group is about 70 to 0.2 weight% in a total fragrance component, Preferably, it is about 40 to 0.5% by weight, more preferably about 20 to 1% by weight, and the aromatic component having an ester group is about 70 to 0.2% by weight, preferably about 40 to 0.5% by weight, more preferably. Can be blended in an amount of about 20 to 1% by weight.

Among the chelating agent weak acids, there are weak acids that easily form insoluble salts with metal ions such as calcium in the composition, such as carbonic acid. The aromatic component alteration inhibitor of the present invention has a chelating effect of metal ions. It is preferable to mix the compound which has. Some of the (i) alkali metal salts are chelated in an aqueous solution, but a known chelating agent may be added if necessary. Examples of chelating agents include, for example, aminocarboxylic acid chelating agents such as EDTA salt, NTA salt, HIDA salt, HEDTA salt, DTPA salt, TTHA salt, GLDA salt, DHEG salt, PDTA salt, DPTA-OH salt, HEDP, etc. Examples thereof include phosphonic acid chelating agents such as salts, NTMP salts, PBTC salts, and EDTMP salts. Among these, a chelating agent having a pKa of 4 to 8 is preferable.

Others The aqueous fragrance composition of the present invention contains water as at least one of the bases. In addition to the above-mentioned components, polyols (dipropylene glycol, propylene glycol, etc.), nonionic surfactants (POE alkyl ether, POE hydrogenated castor oil, etc.), anionic surfactant are used as long as the effects of the present invention are not impaired. Agent, amphoteric surfactant, cationic surfactant, UV absorber, deodorant (plant extract such as green tea extract, catechin, cyclodextrin, amphoteric surfactant), antioxidant, preservative, disinfectant Ingredients that can be usually blended in an aqueous fragrance composition, such as fungicides, natural extracts, silicones, thickeners, dyes, pigments, pigments, oils, organic solvents (ethanol, hydrocarbons, glycol ethers, etc.) Can be blended.

  In addition, the pH of the aqueous fragrance composition of the present invention is adjusted to about 5 to 7.5, preferably about 6 to 7.5, more preferably about 6 by adjusting the blending amount of each component within the aforementioned range. It is desirable to set so as to be about 5 to 7.5. Moreover, you may add well-known pH adjusters, such as hydrochloric acid and magnesium hydroxide, as needed, and may adjust pH of the aqueous | water-based fragrance | flavor composition of this invention in the said range.

Dosage Form The aqueous fragrance composition of the present invention can be prepared in a known dosage form as an aqueous fragrance composition. Such a dosage form is not particularly limited, for example, liquid preparation, gel preparation,
Water-absorbing polymer impregnated preparations, mist preparations, hydrous aerosol preparations and the like can be mentioned.

3. Method for Preventing Alteration of Fragrance Component The method for preventing alteration of an aroma component according to the present invention is to add the alteration prevention component shown in either (1) or (2) above to an aqueous fragrance composition containing an aroma component. Features. The addition amount of each component shown by said (1) or (2) is as above-mentioned. According to the method for preventing deterioration of an aromatic component of the present invention, it is possible to prevent deterioration of the aromatic component due to long-term use or temperature change.

  According to the fragrance component alteration preventing agent of the present invention, alteration of the fragrance component such as when the aqueous fragrance composition is used / stored under high temperature conditions or for a long period of time can be suppressed.

  In addition, according to the present invention, an aqueous fragrance composition in which the deterioration of the fragrance component is suppressed even under high temperature conditions or for long-term use / storage, and the initial fragrance is maintained over a long period of time, and the fragrance component is deteriorated. A prevention method can be provided.

  Furthermore, the anti-deterioration agent of the present invention can impart high stability even to fragrance components having an aldehyde group or an ester group that have been problematic in use as fragrance components due to their instability. it can. Therefore, by blending such a fragrance component and the alteration inhibitor of the present invention in an aqueous fragrance composition, it is possible to enjoy a new fragrance that has not existed before.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these Examples.

Test example 1

Preparation and evaluation of aqueous fragrance compositions
Formula I
Table 1 below. A fragrance composition (Examples 1 to 5 and Comparative Examples 1 and 2) having the composition shown in FIG.

Table 1 above. The appearance, pH and scent sensation of the aqueous fragrance composition prepared according to the above was stored at 50 ° C. for 1 month. The scent sensation is represented by an average score obtained by performing a five-step evaluation using a sensory BOX by nine examinees. The five-step evaluation was performed based on the following evaluation method, and a score of 3.5 or higher was used as an acceptance criterion. The results are shown in Table 1.2.
5 points: No difference at all compared to + 5 ° C storage.
4 points: Differences that cannot be understood unless they are sniffed side by side 3 points: Differences that can be understood without side by side sniffing 2 points: There is clearly a difference 1 point: The incense tone itself is changing.

Formula II
Table 2 below. An aqueous fragrance composition (Examples 6 to 8 and Comparative Example 3) having the composition shown in FIG.

  Table 2 above. Aqueous fragrance compositions were prepared according to the formulation shown in Table 1, and the appearance, pH and scent functionality of the aqueous fragrance composition were evaluated according to the method performed for Formula I. The results are shown in Table 2.2 below.

From the results of pH and fragrance sensory evaluation shown in Tables 1.2 and 2.2, by blending sodium carbonate and citric acid, sodium bicarbonate and citric acid, pH change immediately after blending can be suppressed, It was found that the deterioration of the aromatic component is also suppressed.

Test example 2

Table 3 below. Based on this formulation, aqueous fragrance compositions (Examples 9 to 11 and Comparative Examples 4 to 6) were prepared, and the deterioration-inhibiting effect of the fragrance component was evaluated.

The appearance, pH and scent functionality of the aqueous fragrance composition obtained by the above formulation were evaluated according to the method performed for Formula I. The results are shown in Table 3.2 below.

Test example 3

About Example 3 and Comparative Example 1, after storing at 50 ° C. for 1 month, the decomposition rate was measured by comparing peak intensities of ATD / GC / MS (Automatic Thermal Desorption / Gas Chromatograph / Mass Spectrometer). The measuring method is as follows.
Used equipment:
GC-MS HP6890 MASS Selective Detector (manufactured by HEWLETT PACKARD)
GC column DB-5MS 30m × 250μm × 0.25μm (J & W SCIENTIFIC)
ATD Automated Thermal Desorber TurboMatrix ATD (Perkin Elmer)
ATD collection tube (Tube for thermal desorption for Perkin Elmer) TENAX TA (manufactured by SUPELCO)

GC measurement conditions:
50 ° C. (5 minutes) → 5 ° C./minute→100° C. (0 minute) → 10 ° C./minute→270° C. (13 minutes)
Gas: Helium gas Test method: About 5 mL of the fragrance composition of Example 1 and Comparative Example 3 is taken and diffused in a 1000 L capacity box on a filter paper for about 1 hour. The gas in the box is adsorbed by 1 L at 50 mL / min with an ATD sample tube. This is analyzed by GC / MS for volatile components.

Depending on the structure of the aromatic component, etc., the hydrocarbon aromatic component such as limonene (Rt12.45) is altered to 3,7-dimethyl-1,6-octadien-3-ol (Rt15.04) or α-terpineol (Rt17. 69) etc., the decomposition ratio was measured for these compounds. The limonene decomposition ratio is represented by ((peak area of 3,7-dimethyl-1,6-octadien-3-ol) + (peak area of α-terpineol)) / (peak area of limonene). By calculating how much the decomposition ratio has increased compared to the initial stage, it is possible to measure how much the alteration of the fragrance component in the aqueous fragrance composition can be suppressed.
As a result, when the limonene decomposition ratio in the initial period of Comparative Example 3 was 0.44, it was 1.34 after one month at 50 ° C., and the ratio of decomposed products increased. On the other hand, in Example 1, the limonene decomposition ratio was 0.44 at the initial stage and 0.61 even after one month at 50 ° C., indicating that the deterioration of the aromatic component was suppressed.

Claims (9)

An aromatic component alteration preventive agent comprising as an active ingredient the following component (1) or (2), wherein the total amount is 0.01 to 2% by weight in the water-containing aqueous fragrance composition containing the fragrance component Anti-degeneration agent used at a ratio of:
(1) (i) One kind of alkali metal salt of weak acid having a pKa of 4 to 8 (2) (i) One kind of alkali metal salt of weak acid having a pKa of 4 to 8, (ii) One having a pKa of 4 to 8 At least two or more selected from the group consisting of weak acids and (iii) alkali metal compounds exhibiting strong basicity. The alteration inhibitor according to claim 1, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5. Weak acids previously indicated Symbol (ii) is a combination of a weak acid of less pKa6 to 7.5 in weak acid and a pKa of 5 or more 6, alteration preventing agent according to claim 1. A water-containing aqueous fragrance composition comprising the fragrance component and the alteration preventing component shown in either (1) or (2) below, wherein the blending ratio of the alteration preventing component in the water-containing aqueous fragrance composition is: Aqueous fragrance composition having a total amount of 0.01 to 2% by weight:
(1) (i) One kind of alkali metal salt of weak acid having a pKa of 4 to 8 (2) (i) One kind of alkali metal salt of weak acid having a pKa of 4 to 8, (ii) One having a pKa of 4 to 8 At least two or more selected from the group consisting of weak acids and (iii) alkali metal compounds exhibiting strong basicity. The aqueous fragrance composition according to claim 4, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5. Weak acids previously indicated Symbol (ii) is a combination of a weak acid of 5 or more and less than 6 weak and pKa of pKa6 to 7.5, the aqueous fragrance composition according to claim 4. The aqueous fragrance according to any one of claims 4 to 6, wherein the weak acid is one or more selected from the group consisting of carbonic acid, phosphoric acid, citric acid, malic acid, succinic acid and pyrophosphoric acid. Agent composition. The alteration preventing component shown in either (1) or (2) is contained in a total amount of 0.05 to 0.9% by weight based on the total weight of the aqueous fragrance composition. The aqueous fragrance composition according to any one of the above. In the water-containing aqueous fragrance composition containing the fragrance component, the alteration preventing component shown in either of the following (1) or (2) is added in a total amount of 0.01 to 2 in the water-containing aqueous fragrance composition. A method for preventing deterioration of an aromatic component, which is added so as to be in weight%:
(1) (i) One kind of alkali metal salt of weak acid having a pKa of 4 to 8 (2) (i) One kind of alkali metal salt of weak acid having a pKa of 4 to 8, (ii) One having a pKa of 4 to 8 At least two or more selected from the group consisting of weak acids and (iii) alkali metal compounds exhibiting strong basicity.