WO2007037490A1

WO2007037490A1 - Aqueous fragrance composition

Info

Publication number: WO2007037490A1
Application number: PCT/JP2006/319734
Authority: WO
Inventors: Masahiro Yamashita; Daisaku Nagaike
Original assignee: Kobayashi Pharmaceutical Co., Ltd.
Priority date: 2005-09-30
Filing date: 2006-10-02
Publication date: 2007-04-05
Also published as: JP5235267B2; JP2007099838A

Abstract

[PROBLEMS] To provide an aqueous fragrance composition in which the fragrance ingredient is inhibited from altering during long-term use or with temperature fluctuations and the initial fragrantness can last over long. [MEANS FOR SOLVING PROBLEMS] An agent for inhibiting fragrance ingredient alteration which contains, as an active ingredient, the following ingredient(s) (1) or (2): (1) (i) an alkali metal salt of a weak acid having a pKa of 4-8; and (2) at least two members selected from the group consisting of (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) a strongly basic alkali metal compound.

Description

Specification

Aqueous fragrance composition

Technical field

[0001] 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.

Background art

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 for a period of one month or longer. Some fragrance components blended with fragrances are altered by long-term use and temperature changes, and fragrances that have little change in fragrance even after long-term use and storage have been demanded.

[0003] In order to solve this problem, methods such as adding an anti-oxidation agent to prevent alteration of the fragrance component have been taken. Among the antioxidants, BHT (dibutylhydroxytoluene) is the most widely used antioxidant, and tocotrienol and plant-derived antioxidants have been used (for example, Patent Document 1, 2, 3 etc.). However, these antioxidants alone were not sufficient to suppress the deterioration of the fragrance component caused by use and temperature changes.

[0004] Although it has been known so far to exert a deodorizing action by combining an organic acid, a weak alkaline agent and the like (for example, Patent Documents 4 to 7), the organic acid and the weak alcohol are known. It has not been known that the use of a combination of strength agents suppresses the deterioration of fragrance components.

Patent Document 1: JP 2000-336355 A

Patent Document 2: Japanese Patent Laid-Open No. 06-108087

Patent Document 3: JP 09-183995

Patent Document 4: JP 2002-000711

Patent Document 5: Column 2002— 306583 Patent Document 6: JP 2002-336338 A

Patent Document 7: Japanese Patent Laid-Open No. 06-219928

Disclosure of the invention

Problems to be solved by the invention

[0005] The present invention includes an aromatic component alteration preventing agent capable of preventing deterioration of an aromatic component due to long-term use or temperature change, and an alteration of the aromatic component for an extended period of time, comprising the alteration preventing agent. The main object is to provide an aqueous fragrance composition that can be retained without any problems. Means for solving the problem

[0006] As a result of diligent research, the present inventors have found that, in an aqueous fragrance composition, (l) an alkali metal salt of a weak acid having a pKa of 4 to 8; (2) an alkali of a weak acid having a pKa of 4 to 8 By blending any one of the components shown in the group consisting of a metal salt, a weak acid having a pKa of 4 to 8 and an alkali metal compound having strong basicity, alteration of the aromatic component Was found to be suppressed. The present invention has been completed as a result of further research based on such knowledge.

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 inhibitor comprising the following component (1) or (2) as an active ingredient:

(1) (i) Alkaline metal salt of weak acid with pKa of 4-8

(2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (1 ^ & is a weak acid of 4-8, and (iii) an alkali metal compound having a strong basicity, at least selected from the group consisting of 2 or more types.

Item 2. The agent for preventing alteration according to Item 1, wherein the pKa of the weak acid represented by (i) or (ii) is 6 to 7.5.

Item 3. 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) Alkaline metal salt of weak acid with pKa of 4-8 (2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (1 ^ & is a weak acid of 4-8, and (iii) an alkali metal compound having a strong basicity, at least selected from the group consisting of 2 or more types.

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) (i) Alkaline metal salt of weak acid with pKa of 4-8

(2a) (1¾ is a weak acid with 4 to 8 and (iii) a strongly basic alkali metal compound

(2b) (i) Alkali metal salt of weak acid with pKa of 4-8, and (ii) Combination of weak acid with pKa of 4-8

(2c) A combination of (i) an alkali metal salt of a weak acid having a pKa of 4-8, (ii) a weak acid of a pKa of 4-8, and (iii) an alkali metal compound exhibiting strong basicity.

Item 6. The water-based fragrance composition according to Item 4 or 5, wherein the pKa of the weak acid represented by (i) or (ii) is 6 to 7.5.

Item 7. The aqueous fragrance according to Item 4 or 5, wherein the weak acid shown in (i) or (ii) is a combination of a weak acid having a pKa of not less than 7.5 and not more than 7.5 and a weak acid having a pKa of not less than 5 and less than 6. Composition. Item 8. The aqueous solution according to Item 4 or 5, wherein the weak acid is selected from the group consisting of carbonic acid, phosphoric acid, citrate, malic acid, succinic acid, and pyrophosphoric acid. Air freshener composition.

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 is shown in (ii) above. Item 5. The aqueous fragrance composition according to Item 4, which is a weak acid strength citrate. Item 10. The total amount of the anti-deterioration component shown in (1) or (2) above is 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 4 to 9.

Item 11. , Citronellyl acetate, linalyl acetate, menthyl acetate, borlease Tate, isobornyl acetate, fe-ruethyl acetate, terpenyl acetate, dipentene, limonene (p—Mentha—1, 8—diene), terpinolene (p—Mentha—1, 4 (8) —diene), α Item 4 ~: The aqueous solution according to L0, which is at least one selected from the group consisting of terpinene, myrcene (7-Methyl-3 methylene-1, 6, octadiene) and β pinene (Nopinene) force Air freshener composition.

Item 12. The aroma component is a blended flavor of limonene and at least one selected from the group consisting of otatanal, decanal, citral, citronellal, piperonal, vanillin, hydroxycitronellal, and isocyclocitral. The aqueous fragrance composition according to any one of Items 4 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) Alkaline metal salt of weak acid with pKa of 4-8

Item 14. The method for preventing deterioration according to Item 13, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5.

Item 15. The method for preventing alteration according to Item 13, 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 16. Addition of 0.05 to 0.9% by weight of the total amount of the anti-deterioration component shown in either (1) or (2) above with respect to the total weight of the aqueous fragrance composition Item 13. The method for preventing alteration according to any one of Items 13 to 15,

In the present invention, “deterioration of fragrance component” means both a qualitative change in which the fragrance component undergoes chemical modification and decomposition and the fragrance changes or a quantitative change in which the fragrance disappears. Point to.

[0009] 1. β-stop

The aromatic component alteration preventing agent of the present invention includes the following:

(1) (i) Alkaline metal salt of weak acid with pKa of 4-8

(2) (i) an alkali metal salt of a weak acid having a pKa of 4-8, (1 ^ & is a weak acid of 4-8, and (iii) an alkali metal compound having a strong basicity, at least selected from the group consisting of 2 types or more It is characterized by the fact that the component shown in the above is an effective component.

[ooio] ω alkali metal salt

In the present invention, the alkali metal salt refers to a weak acid having a pKa power of ˜8 described in detail below and a salt of an alkali metal such as lithium, sodium, potassium, rubidium, cesium, frangium and the like. Examples of the alkali metal salt used in the present invention include alkali metal organic acid salts (for example, fruit acid (alphahydroxy acid) salts, pyrophosphates, etc.), inorganic acid salts (for example, carbonates, hydrogencarbonates, Phosphates, etc.), for example, sodium carbonate, potassium carbonate, lithium carbonate, sodium bicarbonate, potassium bicarbonate, sodium succinate, potassium succinate, sodium succinate, potassium succinate, sodium malate, Examples include potassium malate, sodium pyrophosphate, sodium dihydrogen pyrophosphate, sodium pyrohydrogen phosphate, sodium tripolyphosphate, potassium tripolyphosphate, and the like. Of these alkali metal salts, carbonates and fruit acid (alphahydroxy acid) salts are preferred in view of their impact on the natural environment, such as sodium carbonate, potassium carbonate, sodium bicarbonate, and citrate. Sodium, 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.

[0011] (ii) Weak acid

In the present invention, the weak acid has a pKa power of about ˜8, and if it is combined with the above (i) alkali metal salt or (iii) alkali metal compound described later, the effect of preventing deterioration of the aromatic component is exhibited. There is no particular limitation, and those usually used in cosmetics and daily necessities such as daily necessities can be used. Such weak acids include, for example, malic acid (pKa 5.05), taenoic acid (pKa 5.72), succinic acid (pKa 5.61), carbonic acid (pKa 6.35), and diic acid (pKa 7.2). And organic acids such as pyrophosphoric acid (pKa 6.76) and tripolyphosphoric acid (pKa 6.5), inorganic acids, and the like. Preferred are succinic acid, succinic acid, and carbonic acid. These weak acids can be used alone or in combination of two or more.

Among these, it is preferable 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 aromatic component. Examples of such weak acids include carbonic acid and phosphoric acid. In addition, the shadow on the natural environment In consideration of reverberation, carbonic acid is more preferable.

[0013] In addition, a weak acid in the vicinity of pKa7 (for example, pKa6 or more and 7.5 or less, preferably pKa6.5 or more and about 7 or less) and pKa5 or more and less than 6 and preferably pKa5 or more and about 5.5 or less and By combining them, it is possible to expect a better effect of preventing deterioration of the fragrance component. 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. Further, examples of the weak acid having a pKa of 5 or more and less than 6 include malic acid, succinic acid, succinic acid and the like, and kenic acid is more preferable in consideration of the remarkable effect of preventing deterioration of aromatic components and the supply ability. Therefore, for example, by using a combination of carbonic acid and citrate, it is possible to expect a better effect of preventing the deterioration of the aromatic component.

[0014] In addition, the ability of the aromatic component of the present invention to prevent alteration, for example, when (i) an alkali metal salt of a weak acid of pKa4 to 8 and (ii) a weak acidity of pKa4 to 8 is present, the weak acid shown in (i) At least one selected from the group consisting of citrate, malic acid and succinic acid. Further, it is preferable that the weak acid in (i) is carbonic acid, and it is more preferable that the weak acid in (ii) is caustic acid.

[0015] (iii) Alkaline group compounds

In the present invention, the alkali metal compound is a compound containing an alkali metal element such as lithium, sodium, potassium, rubidium, cesium, frangium, etc., and refers to a compound that liberates alkali metal ions in the presence of water. Further, 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, an “alkali metal compound exhibiting strong basicity” means an alkali whose pH is 11.5 or more when dissolved in 1 U of 0.1 U of water at 25 ° C. Refers to a metal compound.

[0016] Examples of such alkali metal compounds include alkali metal hydroxides, alkoxides, and the like, for example, sodium hydroxide, potassium hydroxide, sodium methoxide, potassium t-butoxide, and the like. Preferred are sodium hydroxide and potassium hydroxide. These alkali metal compounds can be used alone or in combination of two or more. [0017] Composition of anti-fogging agent

The above (i) alkali metal salt can be used alone as an anti-altering agent for the aromatic component of the present invention (the embodiment shown in (1) above), (i) an alkali metal salt, (ii) a weak acid, (Iii) Two or more alkali metal compounds exhibiting strong basicity can be used in combination (the embodiment shown in the above (2)).

[0018] Further, as a preferred embodiment of the present invention, there is an aromatic component alteration preventing agent comprising as an active ingredient any of the following components (1) or (2a) to (2c): (1) (i) Alkaline metal salt of weak acid with pKa of 4-8

(2a) ^) 1¾ is a weak acid from 4 to 8 and (iii) a combination of alkali metal compounds showing strong basicity

(2b) (i) Alkali metal salt of a weak acid having a pKa of 4 to 8 and (ii) A combination of a weak acid having a pKa of 4 to 8

(2c) (i) A combination of an alkali metal salt of a weak acid having a pKa of 4 to 8, (1¾ is a weak acid of 4 to 8, and (iii) an alkali metal compound exhibiting strong basicity.

[0019] Among the above (1) and (2a) to (2c), the most preferable embodiment as the anti-deterioration agent for the fragrance component of the present invention is an embodiment using the component shown in (2b) as an active ingredient. is there. In particular, when the alteration inhibitor of the present invention is applied to an aqueous fragrance composition, the effect of the present invention can be remarkably exhibited by adopting the above aspect (2b). In the case of 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 citrate.

[0020] When the component shown in (2) above is employed as an active ingredient, the blending ratio of (i) to (iii) is not particularly limited as long as it can exert the effect of preventing deterioration of the aromatic component. For example, the above (2a) The preferred combinations of (i) to (iii) shown in (2c) are as follows.

[0021] The aromatic component alteration preventing agent of the present invention comprises a combination of (1a to 8 weak acids) and (iii) an alkali metal compound exhibiting strong basicity as shown in (2a) above. The mixing ratio of ii) and (iii) is that when (iii) is 1 part by weight, (ii) is about 0.25 to 200 parts by weight, preferably about 1 to 200 parts by weight, more preferably 2 to 2 parts by weight. : About LOO parts by weight. [0022] The aromatic component alteration inhibitor according to the present invention is a combination of (1) an alkali metal salt of a weak acid having 1 to 8 to 8 and (ii) a weak acid having a pKa of 4 to 8 as shown in (2b) above. When (ii) is 1 part by weight, (i) is about 0.2 to: LO part by weight, preferably about 0.5 to 8 parts by weight. More preferably, it is about 0.7 to 3 parts by weight.

[0023] The aromatic component alteration inhibitor of the present invention comprises (i) an alkali metal salt of a weak acid having a pKa of 4 to 8, as shown in (2c), ^) a weak acid of 4 to 8 in 1¾, and (iii) ) When the combination strength of alkali metal compounds showing strong basicity is also obtained, the compounding ratio of (i), (ii) and (iii) is as follows. About 5 parts by weight, 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. About 1 part by weight, more preferably about 0.01 to 0.1 part by weight.

[0024] The aromatic component alteration preventing agent of the present invention obtained by combining the components (i) to (m) above is

It can be applied to compositions containing fragrance ingredients for the main purpose of fragrance effects, and can suppress qualitative and quantitative changes in fragrance ingredients and retain the initial fragrance for a long period of time. . The composition in which the fragrance component is blended mainly for the above-mentioned fragrance effect is not particularly limited. Examples include rinses, body soaps and other cleaning agents, bathing agents, and antiperspirants. Among these, a fragrance is particularly preferable.

[0025] In any of the above cases (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- About 0.9% by weight, more preferably about 0.1 to 0.5% by weight, and even more preferably about 0.1 to 0.25% by weight, resulting in long-term use, temperature change, etc. It is possible to suppress the deterioration of the aromatic component. At this time, it is desirable to adjust the pH of the composition to about 5 to 7.5, preferably about 6 to 7.5, more preferably about 6.5 to 7.5.

[0026]

2. 7k yarn thread

The present invention provides an aqueous fragrance composition comprising the fragrance component alteration inhibitor and the fragrance component.

[0027] β direction ih l 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 the modification of the fragrance component of the present invention. The total amount 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 to 0.25%. It is desirable to blend so as to be about% 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.

Min

In the aqueous fragrance composition of the present invention! The fragrance component used for a long time is not particularly limited as long as it is used as a raw material for daily necessities. Examples of such aromatic components include aldehydes having 6 to 12 carbon atoms, varnishaldehyde, acetal R, acetophenone, acetyl sedrene, adxal, allyl amyl glycolate, allyl cyclohexane propionate, alpha damascone, anne Bullet, Ambroxan, Amylcinnamic Aldehyde, Amylcinnamic Aldehyde Dimethyl Acetal, Amylvalericate, Amylsalicylate, Isoamyl Acetate, Acetyl Rugenol, Isoamyl Salicylate, Indole, αionone, J3 ionone , Α-methylionone, j8-methylionone, γ-methylionone, indene, ethyl ヮ niline, olanthiol, oak moss No. 1, oribone, oxyphenylon, caryophyllene, kashmeran, force norebo , Garaki solid, caron, coumarin, nolaclezinoremechinoreetenore, gerani_no_one_nore, geraninoreacetate, geraninorefomate, geraninorenitrinore, tetrahydrogeranionore, tetrahydrogeranynoacetate, coabon, sandaroa, sandera , Santa Rex, Santalinol, Methyl Salicylate, Cinamic Alcohol, Cynamic Aldehyde, Cis Jasmon, Citral, Citral Dimethyl Acetal, Citrasal, Citronellal, Citronellol, Citronellylacetate, Citronellyl Formate, Citronellyl-Tolyl, Cyclase, Cyclamenaldehyde, cyclaprop, cinnamyl acetate, dihydrodiasmon, dimethol, isocyclocitral, di Sumaru, Jasumorataton, jazz Moff Iran, steel Larry Rua Sete over preparative, steel Larry Honoré propionate, Sedoroanba, Sedori Honoré acetate, Sedoronore, Celestrid, j8 Damascon, alpha terpineol, gamma terpineol, terpyrucetate, thymol, delta damascone, denoreta C6 to C13 ratatones, tonalid, traseolide, tripral, isonol acetate, nerol, nerell acetate, neoberga Mate, Nopyl Acetate, Nopyl Alcohol, Vacdanol, Hyacinth Dimethylacetal, Hydrotropic Alcohol, Hydroxy Citronellal, α-Pinene, Butyl Butylate, Paratertiary Butinorecyclohexanol, Paratertiary Butinorecyclohexyl Acetate , Ortho-tertiary butylcyclohexanol, diphenyloxide, fluitate, fenthyl alcohol, phenolethyl acetate, isobutylquinol , Phenylethyl alcohol, phenylethyl acetate, phenylacetoaldehyde dimethyl acetal, benzyl acetate, benzyl alcohol, benzyl salicylate, bergamyl acetate, benzaldehyde, benzyl formate, dimethylbenzyl carpinol, hedion, Helional, Helioto Mouth Pin, Cis 3-Hexenore, Cis 1-Hexenole Acetate, Cis 1-Hexenino Resa Recylate, Hexylcinnamic Aldehyde, Hexyl Salicylate, Pentalide, Bell Dock, Onolebonorenoreacetate , Isobonolenoreacetate, Isobonoleneol, Nendoborneol, Manzanate, Mayolate, Mugealdehyde, Milac Aldehyde, Dihydromyrce , Dimyrcetol, mugol, musk ΤΜ— II, musk 781, musk C14, musk 1 \ mustakeketine, musk mobeken, musk mossken, mensanilacetate, mentsonate, methyl anthralate, methyl mugenol, menthol, methyl hue- Ruacetate, Eugenol, Isogenol, Methylisogenol, _{Ί C6-13} lactone, Lime oxide, Methyl lavender ketone, Dihydrolinalool, Ligstral, Lilyal, Limonene, Linalol, Linalol oxide, Tetrahydrolinalol, Tetrahydral Linalyl acetate , Linalyl acetate, rilal, rubafuran, rosephenone, oral oxide, ヮ niline, benzoin, peruvian balsam, tonole banoresum, otatanal, decananole, Peronal, nonylin, hydroxycitronellal, ethyl 2-methylbutyrate, 3-methylbutyl acetate, linalyl acetate, menthyl acetate, borenoacetate, terperyl acetate, dipentene, terpinolene, alpha terpinene, minoresene, β-pinene, tuberose oil, mustin tincture, castrium tincture, shibe Tint tincture, ambergris tincture, peppermint oil, perilla oil, petitdalen oil, pine oil, rose oil, rosemary oil, camphor oil, fine oil, clary sage oil, sandalwood oil, spearmint oil, spike lavender oil, star varnish oil, lavandin Oil, lavender oil, lemon oil, lemongrass oil, lime oil, neroli oil, oak moss oil, okotia oil, pachilili oil, thyme oil, ton force bean tincture, turpentine oil, ヮ -la bean tincture, basil oil, nutmeg oil, shii Toronera oil, clove oil, bored rose oil, cananga oil, cardamom oil, cassia oil, fern wood oil, orange oil, mandarin oil, tangierin oil, anise oil, bay oil, coriander oil, eremi oil, eucalyptus oil, fennel Oil, galvanum oil, gera-um oil, hiba oil, straw oil, jasmine Oil, base Chiba oil, bergamot oil, ylang ylang oil, grapefruit oil

, Yuzu oil and the like. These fragrance components may be used alone or in combination with any combination of two or more.

[0029] Among these aromatic components, a compound having an aldehyde group or a compound having an ester group is likely to be unstable under high temperature conditions. Therefore, by adding the alteration inhibitor of the present invention to the fragrance composition containing these compounds, the stability of these compounds can be increased, and alteration of the fragrance component can be suppressed.

[0030] Examples of the aromatic component having an aldehyde group include otatanal, decanal, citral, citronellal, piperonal, nonylin, hydroxycitronellal, isocyclocitral and the like.

[0031] The aromatic component having an ester group includes, for example, ethyl 2-methyl propylate, 3-methyl butyl acetate, benzyl acetate, gel acetate, citronellyl acetate, linalyl acetate, menthyl acetate, bornyl acetate, isobornol. -Luacetate, ferroethyl acetate, terberyl acetate and the like.

[0032] In addition, hydrocarbon-based aromatic components having about 8 to 12 carbon atoms are easily denatured under high temperature conditions. Therefore, when preparing an aqueous fragrance composition using a hydrocarbon-based fragrance component, it is desirable to blend the fragrance component alteration inhibitor of the present invention.

[0033] Examples of such hydrocarbon fragrance components include dipentene limonene (p-Mentha-1, 8, diene), terpinolene (p Mentha-), for example, in the case of a hydrocarbon fragrance component having 10 carbon atoms. 1, 4 (8) — diene), α-terpinene, myrcene (7— Methyl— 3— methy lene-1, 6-octadiene), βpinene (Nopinene) and the like. These charcoal hydrocarbon aromatic components are added with hydroxyl groups by a hydrolysis reaction, and are particularly susceptible to the quality of the scent. For example, limonene changes to 3, 7 dimethyl-1, 6-octagen 3-ol, α-terbineol, etc. by the hydrolysis reaction, and changes the fragrance.

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

[0035] 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. is there. 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. However, by blending the alteration inhibitor of the present invention, the fragrance composition is improved. 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.

[0036] Further, when the aqueous fragrance composition of the present invention is prepared by including an fragrance component having an aldehyde group or an ester group, the fragrance component having an aldehyde group is 70 to 0.2 wt% in the total fragrance component. %, Preferably about 40 to 0.5% by weight, more preferably about 20 to 1% by weight, and about 70 to 0.2% by weight of the aromatic component having an ester group, preferably about 40 to 0.5% by weight. More preferably, about 20 to 1% by weight can be blended.

[0037] Chelate II

Among weak acids, there are weak acids that easily form insoluble salts with metal ions such as carbonic acid, such as carbonic acid, and the aromatic component alteration inhibitor of the present invention has a chelating effect of metal ions. It is preferable to have a compound with Some of the above (i) alkali metal salts chelate in an aqueous solution. If necessary, a known chelating agent may be added. Examples of chelating agents include, for example, EDTA salt, salt salt 'HIDA salt' HEDTA salt, DTP salt salt, TTHA salt, GLDA salt, DHEG salt, PDTA salt, DPTA—OH salt, etc. HEDP salt, NTMP salt, PBTC salt, EDTMP salt, etc. Examples include acid-based chelating agents. Of these, chelating agents having a pKa power of ˜8 are preferred.

[0038] Other

The aqueous fragrance composition of the present invention contains water as at least one of the bases. In addition to the above components, polyols (dipropylene glycol, propylene glycol, etc.), nonionic surfactants (POE alkyl ether, POE hardened castor oil, etc.), On-active surfactant, amphoteric surfactant, cationic surfactant, UV absorber, deodorant (plant extract such as green tea extract, catechin, cyclodextrin, amphoteric surfactant), anti-oxidative agent, Preservatives, disinfectants, fungicides, natural extracts, silicones, thickeners, dyes, pigments, pigments, oils, organic solvents (ethanol, hydrocarbons' glycol ethers, etc.), etc. Components that can be usually blended can be blended as appropriate.

[0039] The pH of the aqueous fragrance composition of the present invention is about pH 5 to 7.5, preferably about pH 6 to 7.5, by adjusting the blending amount of each component within the above-mentioned range. More preferably, it is desirable to set the pH to about 6.5 to 7.5. If necessary hydrochloride, was added a known pH adjusting agents, such as magnesium hydroxide of the _P H of the aqueous fragrance composition of the present invention be adjusted to the above range.

[0040] 舰

The aqueous fragrance composition of the present invention can be prepared in a dosage form known as an aqueous fragrance composition. Such dosage forms are not particularly limited, and examples include liquid preparations, gel preparations, water-absorbing polymer impregnation preparations, mist preparations, hydrous aerosol preparations, and the like.

[0041] 3. How to prevent wrinkles

The method for preventing alteration of a fragrance component according to the present invention is characterized in that the alteration prevention component shown in the above (1) or (2) is added to an aqueous fragrance composition containing a fragrance component. The addition amount of each component shown in the above (1) or (2) is as described above. According to the method for preventing alteration of aroma components of the present invention, it is possible to prevent alteration of aroma components due to long-term use or temperature change. The invention's effect

[0042] 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 under high temperature conditions or used for a long period of time Z can be suppressed.

[0043] Further, according to the present invention, there is provided an aqueous fragrance composition in which deterioration of the fragrance component is suppressed even under high temperature conditions or long-term use Z storage, and the initial fragrance is maintained over a long period of time. It is possible to provide a method for preventing deterioration of an aromatic component.

[0044] Further, the anti-deterioration agent of the present invention is also highly resistant to an aromatic component having an aldehyde group or an ester group, which has been problematic in its use as an aromatic component because of its instability.ヽ Stability can be imparted. Therefore, by blending such a fragrance component and the anti-degeneration agent of the present invention in an aqueous fragrance composition, it is possible to enjoy a new fragrance that has never been so powerful.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to these examples.

Test example 1

[0046] Preparation and evaluation of water fragrance composition The fragrance compositions (Examples 1 to 5 and Comparative Examples 1 and 2) having the compositions shown in Table 1 below were prepared. [0047] [Table 1]

Table 1. Formulation of aqueous fragrance composition I

01) 2- (3, 5- ter t-shi ').

02) Toray 'Dawko-Nink' · manufactured by Silicon Corporation SH5505 E UL Aqueous fragrance composition prepared according to the above table 1. stored at 50 ° C for 1 month, appearance, pH and scent Evaluated. The scent sensation is expressed as the average of the results of a five-point evaluation using a sensory BOX by 9 subjects. The five-level evaluation was performed based on the following evaluation method, and a score of 3.5 or higher was accepted. The results are shown in Table 1.2. 5 points: Compared to + 5 ° C stored products, there is no difference in force.

4 points: Do n’t compare sniffing side-by-side,

3 points: Differences that can be divided even if you do not sniff side by side! ヽ

2 points: Clearly different

1 point: The incense tone itself changes.

[0049] [Table 2]

Table 1.2

[0050] Formula II

Aqueous fragrance compositions (Examples 6 to 8 and Comparative Example 3) having the compositions shown in Table 2 below were prepared.

[0051] [Table 3]

Table 2. Formulation of aqueous fragrance composition II

(* 1) 2— (3, 5— tert-dipentyl-2-hydroxyphenyl) 1 2H-benzotriazol (* 2) Toray 'Dauco 12' manufactured by Silicone Corporation SH5505 EMUL

[0052] An aqueous fragrance composition was prepared according to the formulation shown in Table 2 above, 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.

[0053] [Table 4] Table 2.2

From the results of pH and scent sensory evaluation shown in Tables 1.2 and 2.2, the combination of sodium carbonate and taenoic acid, sodium hydrogen carbonate and citrate can suppress pH changes immediately after compounding. It was also found that the deterioration of the aromatic component was suppressed. Test example 2

[0055] Aqueous fragrance compositions (Example 9-: L1 and Comparative Examples 4-6) were prepared based on the formulation shown in Table 3 below, and the effect of suppressing deterioration of the fragrance component was evaluated.

[0056] [Table 5] Table 3.

(* 1) 2— (To 3,5H: ert-y. Ntil-2-hydroxy I 2)-2Η-Nzotriasole

(* 2) Toray 'Dauco 12' SHILCO-IN SH5505

[0057] The appearance, pH and scent function 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.

[0058] [Table 6] Table 3.2

Test example 3

About Example 3 and Comparative Example 1, after storing at 50 ° C for 1 month, ATDZGCZMS (Automatic fhermal Desorption

The decomposition rate was measured by comparing the peak intensities of the I Gas Chromatograph I Mass Spectrometer. The measuring method is as follows.

Used equipment:

GC-MS HP6890 MASS Selective Detector (HEWLETT PACKARD);

GC column DB—5MS 30m X 250 _i um X 0.25 μm (manufactured by J & W SCIENTIFIC)

ATD Automated Thermal Desorber TurboMatrix

ATD (Perkin Elmer)

ATD collection tube (Heat desorption tube for Perkin Elmer) TENAX TA (SUPELCO) GC measurement conditions:

50 ° C (5 minutes) → 5 ° CZ minutes → 100 ° C (0 minutes) → 10 ° CZ minutes → 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 for about 1 hour in a 1000 L capacity box on the filter paper. Adsorb 1 L of gas in the box with ATD sample tube at 50 mLZmin. This is analyzed by GCZMS for volatile components.

Depending on the structure of the aromatic component, hydrocarbon aroma components such as limonene (Rtl2. 45) are altered, and 3, 7 dimethyl-1, 6-octagen 3-ol (Rtl5. 04) and α-tervineol (Rtl7. 69) ) Etc. The decomposition ratio was then measured. The limonene decomposition ratio is expressed as ((peak area of 3,7 dimethyl-1,6-octagen 3-ol) + (a peak area of tervineol)) Z (peak area of limonene). By calculating how much the degradation ratio has increased compared to the initial level, it is possible to determine how much the deterioration of the fragrance component in the aqueous fragrance composition could be suppressed.

As a result, the initial limonene decomposition ratio of Comparative Example 3 was 0.44, which was 1.34 after 1 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 1 month at 50 ° C., indicating that alteration of the aromatic component was suppressed.

Claims

Claims [1] An agent for preventing alteration of an aromatic component, comprising as an active ingredient any one of the following (1) or (2)

(1) (i) Alkaline metal salt of weak acid with pKa of 4-8

[2] The anti-altering agent according to claim 1, wherein the weak acid represented by (i) or (ii) has a pKa of 6 to 7.5.

[3] The alteration inhibitor according to claim 1, wherein the weak acid represented by (0 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.

[4] Aqueous fragrance composition comprising a fragrance component and an alteration preventing component shown in (1) or (2) below:

(1) (i) Alkaline metal salt of weak acid with pKa of 4-8

[5] 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.

[6] The aqueous fragrance composition according to claim 4, wherein the weak acid represented by (0 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.

[7] The aqueous fragrance according to claim 4, wherein the weak acid is selected from the group consisting of carbonic acid, phosphoric acid, citrate, malic acid, succinic acid, and pyrophosphoric acid. Agent composition.

[8] The total amount of the anti-deterioration component shown in either (1) or (2) is 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 4 to 7.

[9] A method for preventing deterioration of an aroma component, comprising adding to the aqueous fragrance composition containing the aroma component an anti-alteration component as shown in (1) or (2) below:

(1) (i) Alkaline metal salt of weak acid with pKa of 4-8

(2) (i) An alkali metal salt of a weak acid having a pKa of 4-8, (1 ^ & is a weak acid of 4-8, and (iii) a strong salt At least two or more selected from the group consisting of basic alkali metal compounds.