Method of preventing discoloration of perfume delivery particles

Abstract

To provide a method for preventing discoloration of perfume delivery particles during storage.SOLUTION: The method for preventing the discoloration of the perfume delivery particle comprises adding (C) a polysaccharide to the perfume delivery particle containing (A) an inorganic excipient and (B) a perfume.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a method for preventing discoloration of perfume delivery particles. [Background technology]

[0002] In recent years, research has been conducted into techniques for imparting functions such as fragrance, sterilization, disinfection, antibacterial properties, and UV protection to textile products by using auxiliary ingredients other than detergent compositions when washing textile products. In particular, attempts have been made to attach perfume components to textile products by adding a granular composition in which a perfume is supported on a solid carrier, i.e., perfume delivery particles, separately from the detergent composition during washing.

[0003] Patent Document 1 discloses fragrance particles that contain (a) a polyhydric alcohol that is liquid at 25°C and (b) polyethylene glycol, and the weight ratio of component (a) to component (b) is in the range of (a) / (b) = 0.0025 to 0.5, and that suppress fragrance evaporation during storage while rapidly dissolving without losing particle strength, particularly when stored in a high-humidity environment. Patent Document 2 discloses fragrance particles that have excellent stability during transportation and storage and a good appearance, and that contain (A) 5 to 30% by weight of a fragrance, (B) an oil-absorbing carrier having an oil absorption capacity of 100 ml / 100 g or more but less than 800 ml / 100 g as measured according to JIS K5101, (C) a binder, and (D) non-hygroscopic inorganic particles having an oil absorption capacity of less than 100 ml / 100 g as measured according to JIS K5101 and containing 20% ​​or more particles with a particle size of less than 20 μm and 10% or more particles with a particle size of 100 μm or more, and that are compacted by extrusion granulation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-111705 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-330362 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the present inventors have found that such perfume delivery particles can become discolored during storage, and that preventing this can be a challenge. The present invention provides a method for preventing discoloration of perfume delivery particles during storage. [Means for solving the problem]

[0006] The present inventors have found that by including a polysaccharide in the fragrance delivery particles, discoloration of the fragrance delivery particles during storage can be suppressed. That is, the present invention relates to a method for preventing discoloration of fragrance delivery particles, which contain (A) an inorganic excipient (hereinafter referred to as component (A)) and (B) a fragrance (hereinafter referred to as component (B)), by incorporating (C) a polysaccharide (hereinafter referred to as component (C)). [Effects of the Invention]

[0007] According to the present invention, there is provided a method for preventing discoloration of perfume delivery particles during storage. DETAILED DESCRIPTION OF THE INVENTION

[0008] The reason why the method of the present invention can prevent discoloration of perfume delivery particles during storage is not entirely clear, but is presumed to be as follows. Many fragrances are fragrance compounds that have relatively reactive functional groups such as aldehyde groups or ketone groups. Furthermore, as described in JP 2010-284511 A, such fragrance compounds are prone to changes in fragrance tone and color due to exposure to light and other factors. In addition, fragrances supported on inorganic excipients are more likely to be exposed to air and light than liquid fragrances, increasing the risk of discoloration and fragrance tone changes. In the present invention, by incorporating a polysaccharide (C) such as dextrin into fragrance delivery particles containing an inorganic excipient (A) and a fragrance (B), the hydroxyl and glycoside groups commonly found in polysaccharides are encapsulated with functional groups such as aldehyde groups, ketone groups, and unsaturated alcohols present in the fragrance via hydrogen bonds, thereby suppressing reactions such as oxidation due to exposure to light and air. Furthermore, even if the above reaction were to proceed, it is presumed that the polysaccharide would tightly encapsulate the reaction product, thereby preventing it from seeping out onto the particle surface, thereby suppressing any change in color that would be visible to the naked eye. However, the present invention is not limited to the above-mentioned mechanism of action.

[0009] The present invention relates to a method for preventing discoloration of fragrance delivery particles by incorporating (C) a polysaccharide (hereinafter referred to as component (C)) into fragrance delivery particles containing (A) an inorganic excipient (hereinafter referred to as component (A)) and (B) a fragrance (hereinafter referred to as component (B)). Hereinafter, the fragrance delivery particles that are the subject of the method for preventing discoloration of fragrance delivery particles of the present invention will be referred to as the fragrance delivery particles of the present invention.

[0010] The perfume delivery particles of the present invention contain an inorganic excipient as component (A).

[0011] From the viewpoint of the solubility of the perfume delivery particles, the component (A) preferably contains a water-soluble inorganic excipient (hereinafter referred to as the component (A1)). In the present invention, the water-soluble inorganic excipient refers to an inorganic excipient that dissolves in an amount of 1.0 g or more in 100 g of water at 20°C.

[0012] The component (A1) may be one or more water-soluble inorganic excipients selected from alkali metal sulfates, alkaline earth metal sulfates, alkali metal hydrogen sulfates, alkaline earth metal hydrogen sulfates, alkali metal chlorides, and alkaline earth metal chlorides. From the viewpoint of production, one or more water-soluble inorganic excipients selected from alkali metal sulfates, alkaline earth metal sulfates, and alkali metal chlorides are preferred, one or more water-soluble inorganic excipients selected from sodium sulfate, magnesium sulfate, and sodium chloride are more preferred, and one or more water-soluble inorganic excipients selected from sodium sulfate and magnesium sulfate are even more preferred.

[0013] From the viewpoints of production and the strength of the delivery particles, it is preferable that component (A) contains a water-insoluble inorganic excipient [hereinafter referred to as component (A2)]. In the present invention, the water-insoluble inorganic excipient refers to an inorganic excipient that dissolves in an amount of less than 1.0 g in 100 g of water at 20°C.

[0014] The component (A2) may be one or more water-insoluble inorganic excipients selected from amorphous aluminosilicates, calcium silicate, silicon oxide, and crystalline aluminosilicates.

[0015] Examples of amorphous aluminosilicates include AluminumSilicate P820 (manufactured by Degussa) and TIXOLEX 25 (manufactured by Hanfutsu Chemical Co., Ltd.), and those represented by the following general formula are also preferably used: These compounds are characterized by having ion exchange capacity. xM2O·Al2O3·ySiO2·wH2O (where M represents an alkali metal such as sodium or potassium, and x, y, and w represent the number of moles of each component within the following ranges: 0.2≦x≦2.0; 0.5≦y≦10.0; and w is any positive number including 0) xMeO·yM2O·Al2O3·zSiO2·wH2O (where Me represents an alkaline earth metal such as calcium or magnesium, and M represents an alkali metal such as sodium or potassium, and x, y, z, and w represent the number of moles of each component within the following ranges: 0.001≦x≦0.1; 0.2≦y≦2.0; 0.5≦z≦10.0; and w is any positive number including 0)

[0016] Examples of calcium silicate include Fluorite R (manufactured by Tokuyama Soda Co., Ltd.) and HUBERSORBR 600 (manufactured by Huber).

[0017] Specific examples of silicon oxide include white carbon, and more specific examples include ordinary white carbon and calcined white carbon. Ordinary white carbon is a general term for amorphous silicon dioxide made of SiO2, and is divided into precipitated silica and fumed silica depending on the manufacturing method. Calcined white carbon is white carbon obtained by treating ordinary white carbon at high temperature to hydrophobize the silanol groups on the surface.

[0018] Crystalline aluminosilicates are generally called zeolites and are represented by the following formula (1): a'(M2O)·Al2O3·b'(SiO2)·w(H2O) (1) (In the formula, M represents an alkali metal atom, a', b', and w represent the number of moles of each component, generally 0.7≦a'≦1.5, 0.8≦b'<6, and w is any positive number.) Among them, those represented by the following general formula (2): Na2O·Al2O3·n(SiO2)·w(H2O) (2) (where n is a number between 1.8 and 3.0, and w is a number between 1 and 6.) Preferably, the compound represented by the formula: The crystalline aluminosilicate (zeolite) is preferably a synthetic zeolite having an average primary particle size of 0.1 to 10 μm, such as zeolite type A, type X, or type P. Zeolite may be used in the form of powder and / or agglomerated dried zeolite particles obtained by drying a zeolite slurry.

[0019] From the viewpoint of oil absorption capacity and ensuring the strength of the granulated delivery particles, component (A2) is preferably one or more selected from silicon oxide and calcium silicate, and more preferably silicon oxide.

[0020] In the fragrance delivery particles of the present invention, the content of component (A) is preferably 35% by mass or more, more preferably 50% by mass or more, even more preferably 60% by mass or more, and preferably 90% by mass or less, more preferably 85% by mass or less, even more preferably 80% by mass or less, even more preferably 75% by mass or less, and even more preferably 70% by mass or less, from the viewpoint of ensuring the strength of the granulated delivery particles and preventing discoloration.

[0021] When the fragrance delivery particles of the present invention contain component (A1) as component (A), the content of component (A1) is preferably 30% by mass or more, more preferably 45% by mass or more, even more preferably 50% by mass or more, and preferably 85% by mass or less, more preferably 80% by mass or less, even more preferably 75% by mass or less, even more preferably 70% by mass or less, even more preferably 65% ​​by mass or less, even more preferably 60% by mass or less, and even more preferably 55% by mass or less, from the viewpoint of ensuring the solubility of the granulated delivery particles.

[0022] When the fragrance delivery particles of the present invention contain component (A2) as component (A), the content of component (A2) is preferably 3% by mass or more, more preferably 4% by mass or more, even more preferably 6% by mass or more, from the viewpoint of suppressing a decrease in yield during granulation and ensuring the strength of the granulated delivery particles, and is preferably 20% by mass or less, more preferably 15% by mass or less, even more preferably 10% by mass or less.

[0023] When the fragrance delivery particles of the present invention optionally contain components (A1) and (A2) as component (A), the mass ratio (A1) / [(A1)+(A2)] of the content of component (A1) to the total content of components (A1) and (A2) is, from the viewpoint of achieving both instant solubility and durability of the granulated delivery particles, preferably 0.6 or more, more preferably 0.7 or more, even more preferably 0.8 or more, still more preferably 0.82 or more, even more preferably 0.85 or more, and preferably 1.0 or less, more preferably 0.95 or less, and even more preferably 0.92 or less.

[0024] The perfume delivery particles of the present invention contain a perfume as component (B). The term "fragrance" as used herein is not particularly limited, as long as it is one or more selected from fragrances and fragrance precursors. Examples of fragrances that can be used include those described in "Fragrance and Fragrance Blending Basics" by Nakajima Mototaka, 4th edition, Sangyo Tosho Co., Ltd., April 20, 2005, and fragrance compounds known to be incorporated into fabric softeners through patent documents. The fragrance compounds may be a single compound or a mixture of two or more compounds. Fragrance components or blended fragrance compositions independently prepared by fragrance manufacturers can also be used. The fragrance may be a single fragrance compound or a fragrance composition containing two or more fragrance compounds, and the fragrance composition may contain a fragrance diluent or solvent in addition to the fragrance compound. Fragrance precursors can also be used as the fragrance. Microencapsulated fragrances are excluded from component (B) of the present invention.

[0025] When component (B) contains one or more fragrance compounds (hereinafter referred to as component (B1)) selected from fragrance compounds having an unsaturated bond and an aldehyde group or a ketone group, the fragrance delivery particles of the present invention undergo a more advanced fragrance degradation reaction during storage, thereby more effectively benefiting from the effects of the method of preventing discoloration of fragrance delivery particles of the present invention.

[0026] Examples of the fragrance compound (B1) having an unsaturated bond and an aldehyde group include α-amylcinnamic aldehyde, benzaldehyde, cinnamic aldehyde, cis-4-heptenal, cis-4-decenal, citral, citronellal, cuminaldehyde, cyclamen aldehyde, 3,6(4,6)-dimethyl-3-cyclohexene-1-carbaldehyde (trade name: Cycloberthal / Kao: registered trademark), floral ozone, heliotropin, helional, α-hexylcinnamic aldehyde, hydratropic aldehyde, isocyclocitral, 3-(4-tert-butylphenyl)butanal (trade name: Lilial), maceal, and miracaldehyde. Examples of suitable aldehydes include 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde, perillaldehyde, trans-2-hexenal, trimethylundecenal, a mixture of 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde and 3,5-dimethyl-3-cyclohexene-1-carboxaldehyde (trade names: Ligustral or Triplal), anisaldehyde, vanillin, ethyl vanillin, methyl vanillin, a mixture of 4-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde and 3-(4-hydroxy-4-methylpentyl)-3-cyclohexene-1-carboxaldehyde (trade name: Lyral / IFF Co., Ltd.: registered trademark), and these may be used alone or in combination.

[0027] Examples of the fragrance compound (B1) having an unsaturated bond and a ketone group include acetophenone, p-methylacetophenone, 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2-buten-1-one (α-damascone, Firmenich), 1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-buten-1-one (β-damascone, Firmenich), 1-(2,6,6-trimethyl-3-cyclohexen-1-yl)-2-buten-1-one (δ-damascone, IFF), 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-1,6-heptadien-3-one (allylionone), 1-(5,5-dimethyl-cyclohexen-1-yl)-4-penten-1-one (Dynacon, Firmenich), cis-jasmone, dihydrojasmone, 1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2-buten-1-one (damascenone, Firmenich), 7-acetyl-1,2,3,4,5,6,7,8-octahydro -1,1,6,7-Tetramethylnaphthalene (Iso E Super, manufactured by IFF), 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one (α-ionone), 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-buten-2-one (β-ionone), menthone, carvone, 5-(2,6,6-trimethyl-2-cyclohexen-1-yl)-4-penten-3-one (α-methylionone), 5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-4-penten-3-one (α-methylionone), Examples of such ketones include 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-4-penten-3-one (β-methylionone), 4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-methyl-3-buten-2-one (α-isomethylionone), 4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-methyl-3-buten-2-one (δ-methylionone), methyl nonyl ketone, nootkatone, maltol, ethyl maltol, raspberry ketone, and methyl naphthyl ketone, and these may be used alone or in combination.

[0028] (B1) Ingredients: Ionone Beta, Cyclamen Aldehyde, ISOE Super, 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2-buten-1-one, 1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-buten-1-one, 1-(2,6,6-trimethyl-3-cyclohexen-1-yl)-2-buten-1-one, 1-(5,5-dimethyl-cyclohexen-1-yl)-4-penten-1-one, 1-(2,6,6-trimethyl-1,3-cyclohexadien-1-yl)-2-buten-1-one, 2,4-dimethyl-3-cyclohexen-1-yl One or more fragrance compounds selected from hexene-1-carboxaldehyde, 3,5-dimethyl-3-cyclohexene-1-carboxaldehyde, and α-hexyl cinnamic aldehyde, particularly one or more fragrance compounds selected from ionone beta, cyclamen aldehyde, isoe super, and α-hexyl cinnamic aldehyde, are important fragrance ingredients in perfumery but are also listed as fragrances that are significantly affected by discoloration. When these compounds are included, the fragrance delivery particles of the present invention undergo a more severe fragrance denaturation reaction during storage, and therefore can particularly benefit from the effects of the method of preventing discoloration of fragrance delivery particles of the present invention.

[0029] In the fragrance delivery particles of the present invention, the content of component (B) is preferably 2% by mass or more, more preferably 3% by mass or more, even more preferably 4% by mass or more, even more preferably 6% by mass or more, even more preferably 8% by mass or more, and preferably 20% by mass or less, more preferably 17.5% by mass or less, even more preferably 15% by mass or less, and even more preferably 13% by mass or less, from the viewpoint of imparting a residual fragrance to clothing and preventing the fragrance component from seeping out.

[0030] In the fragrance delivery particles of the present invention, when the (B) component contains the (B1) component, the content of the (B1) component in the (B) component is preferably 5% by mass or more, more preferably 10% by mass or more, and even more preferably 15% by mass or more, from the viewpoint of ensuring the fragrance's palatability, and is preferably 50% by mass or less, more preferably 45% by mass or less, even more preferably 40% by mass or less, and even more preferably 30% by mass or less, from the viewpoint of suppressing discoloration of the delivery particles during storage.

[0031] When the fragrance delivery particles of the present invention contain a (B1) component as the (B) component, the content of the (B1) component in the fragrance delivery particles is, from the viewpoint of enjoying the effects of the present invention, preferably 0.1% by mass or more, more preferably 1.0% by mass or more, even more preferably 1.5% by mass or more, and preferably 10% by mass or less, more preferably 7.5% by mass or less, even more preferably 6.0% by mass or less, even more preferably 5.0% by mass or less, even more preferably 4.0% by mass or less, even more preferably 3.0% by mass or less, and even more preferably 2.5% by mass or less.

[0032] In the method of preventing discoloration of fragrance delivery particles of the present invention, discoloration due to the fragrance during storage can be suppressed by adding a polysaccharide as component (C) to fragrance delivery particles containing (A) an inorganic excipient [hereinafter referred to as component (A)] and (B) a fragrance [hereinafter referred to as component (B)] of the present invention. That is, the perfume delivery particles of the present invention contain a polysaccharide as component (C). Furthermore, the phrase "compound (C) is added to perfume delivery particles containing components (A) and (B)" does not specify the order in which components (A), (B), and (C) are added to the perfume delivery particles, and the order in which each component is added is not limited in any way.

[0033] The polysaccharide of component (C) may be one or more selected from dextrin, cellulose and its derivatives, starch, locust bean gum, guar gum, pullulan, chitin, chitosan, agarose, carrageenan, curdlan, etc., and from the viewpoint of preventing the leaching of the flavoring component and the solubility of the delivery particles, it is preferably one or more selected from dextrin, cellulose and its derivatives, and starch, and more preferably dextrin.

[0034] Dextrin is obtained by partial hydrolysis of starch. Starch molecules are gradually broken down into smaller molecules through hydrolysis, ultimately becoming glucose. Depending on the degree of hydrolysis, a mixture of various sugars is produced. For example, the dextrin used in the present invention may be water-soluble starch, modified starch, or a derivative thereof, such as one or more selected from esterified starch (e.g., starch phosphate), etherified starch (e.g., carboxymethylated starch), enzyme-modified dextrin (e.g., maltodextrin), and roasted dextrin. Furthermore, it is preferable to use starch prepared by mixing, in a predetermined ratio, non-reducing end starch having a dextrose equivalent value (hereinafter referred to as DE value) of 0 to 8, as defined by the following formula, with water-soluble starch, modified starch, or a derivative thereof in which the glucose end has been converted to a reducing end by hydrogenation. Non-reducing end starch is starch in which both ends are non-reducing ends (having no reducing ends).

[0035] DE value = [direct reducing sugars (expressed as glucose) / solids] x 100 In particular, the dextrin is preferably one having a DE value in the range of 0 to 8 and having been subjected to a hydrogenation treatment, and more preferably one containing a starch carrier mixed with starch having a DE value in the range of 0 to 3 and having a glucose end as a reducing end.

[0036] Starch hydrolysis can be carried out by standard methods such as acid-catalyzed or enzyme-catalyzed methods. Specific examples of dextrins include those produced by the method described in Japanese Patent Application Laid-Open No. 8-143603. Among these dextrins, dextrins with a specific volume of 5 m3 or less are preferred due to their oil absorption capacity. 2 / g or more 10m 2 The glass transition temperature of dextrin is preferably 200° C. or higher from the viewpoint of stability at high temperatures.

[0037] The cellulose and its derivatives include one or more selected from carboxymethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, cationized cellulose, and the like. The starch may be one or more selected from corn starch, wheat starch, potato starch, tapioca starch, and the like.

[0038] In the method for preventing discoloration of fragrance delivery particles of the present invention, the fragrance delivery particles of the present invention contain component (C) in an amount of preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 2.5% by mass or more, even more preferably 5.1% by mass or more, even more preferably 6.0% by mass or more, even more preferably 7.0% by mass or more, and preferably 35% by mass or less, more preferably 30% by mass or less, even more preferably 25% by mass or less, even more preferably 20% by mass or less, even more preferably 15% by mass or less, and even more preferably 12% by mass or less, from the viewpoint of preventing discoloration and ensuring the strength of the granulated delivery particles. Furthermore, in the fragrance delivery particles of the present invention, the content of component (C) is preferably 1% by mass or more, more preferably 2% by mass or more, even more preferably 2.5% by mass or more, even more preferably 5.1% by mass or more, even more preferably 6.0% by mass or more, even more preferably 7.0% by mass or more, and preferably 35% by mass or less, more preferably 30% by mass or less, even more preferably 25% by mass or less, even more preferably 20% by mass or less, even more preferably 15% by mass or less, and even more preferably 12% by mass or less, from the viewpoint of preventing discoloration and ensuring the strength of the granulated delivery particles.

[0039] In the method for preventing discoloration of fragrance delivery particles of the present invention, the fragrance delivery particles of the present invention contain component (C) such that the mass ratio (C) / (A) of the content of component (C) to the content of component (A) in the fragrance delivery particles is preferably 0.01 or more, more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.07 or more, even more preferably 0.09 or more, even more preferably 0.11 or more, even more preferably 0.13 or more, even more preferably 0.15 or more, and preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.3 or less, and even more preferably 0.2 or less, from the viewpoints of discoloration prevention performance, ensuring the strength of the granulated delivery particles, and solubility. Furthermore, in the fragrance delivery particles of the present invention, the mass ratio (C) / (A) of the content of component (C) to the content of component (A) is preferably 0.01 or more, more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.07 or more, even more preferably 0.09 or more, even more preferably 0.11 or more, even more preferably 0.13 or more, even more preferably 0.15 or more, and preferably 1.0 or less, more preferably 0.5 or less, even more preferably 0.3 or less, and even more preferably 0.2 or less, from the viewpoints of discoloration prevention performance, ensuring the strength of the granulated delivery particles, and solubility.

[0040] In the method for preventing discoloration of fragrance delivery particles of the present invention, when the fragrance delivery particles of the present invention contain component (A2) as component (A), the fragrance delivery particles of the present invention contain component (C) such that the mass ratio (C) / (A2) of the content of component (C) to the content of component (A2) in the fragrance delivery particles is preferably 0.15 or more, more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.6 or more, even more preferably 0.8 or more, even more preferably 1.0 or more, even more preferably 1.2 or more, and preferably 5.0 or less, more preferably 3.0 or less, even more preferably 2.0 or less, and even more preferably 1.5 or less, from the viewpoint of ensuring discoloration prevention performance and the strength of the granulated delivery particles. Furthermore, when the fragrance delivery particles of the present invention contain component (A2) as component (A), the mass ratio (C) / (A2) of the content of component (C) to the content of component (A2) is, from the viewpoint of preventing discoloration and ensuring the strength of the granulated delivery particles, preferably 0.15 or more, more preferably 0.3 or more, even more preferably 0.5 or more, even more preferably 0.6 or more, even more preferably 0.8 or more, even more preferably 1.0 or more, even more preferably 1.2 or more, and preferably 5.0 or less, more preferably 3.0 or less, even more preferably 2.0 or less, and even more preferably 1.5 or less.

[0041] The fragrance delivery particles of the present invention may further contain, as component (D), a polyalkylene glycol having a weight average molecular weight of 2,000 or more and 20,000 or less, in order to ensure the strength of the granulated delivery particles and to suppress the evaporation of fragrance components from the delivery particles.

[0042] Component (D) may be one or more selected from polyethylene glycol, polypropylene glycol, and random or block adducts of ethylene oxide and propylene oxide. From the viewpoint of production, such as ease of handling of the raw materials during granulation and high handleability, it is preferably one or more selected from polyethylene glycol and polypropylene glycol, and more preferably polyethylene glycol.

[0043] The weight average molecular weight of component (D) is 2,000 or more, preferably 3,000 or more, more preferably 4,000 or more, even more preferably 6,000 or more, and 20,000 or less, preferably 15,000 or less, even more preferably 12,000 or less, and even more preferably 10,000 or less, from the viewpoint of preventing stickiness of the delivery particle surface during storage in a high-temperature environment and ensuring the solubility of the delivery particle. The weight-average molecular weight of component (D) is determined by gel permeation chromatography (GPC) using a mixed solution of acetonitrile and water (phosphate buffer solution) as the developing solvent and polyethylene glycol as the standard.

[0044] When the fragrance delivery particles of the present invention contain component (D), the content of component (D) in the fragrance delivery particles of the present invention is preferably 8% by mass or more, more preferably 10% by mass or more, even more preferably 12% by mass or more, and preferably 30% by mass or less, more preferably 25% by mass or less, even more preferably 20% by mass or less, from the viewpoints of suppressing evaporation of the fragrance component from the delivery particles and improving the solubility of the delivery particles.

[0045] The fragrance delivery particles of the present invention may contain other ingredients such as fragrances encapsulated in microcapsules, water-soluble cationic polymeric compounds, cationic surfactants, organic solvents, antibacterial agents, oxidation stabilizers, pigments, dyes, etc. (excluding those corresponding to components (A), (B), (C), and (D)).

[0046] The perfume delivery particles of the present invention are not particularly limited, but may preferably be spherical, hemispherical, cylindrical, granular, or powdery, and from the standpoints of appearance and usability, spherical, hemispherical, or cylindrical shapes are preferred.

[0047] From the viewpoint of solubility and handling, the perfume delivery particles of the present invention may have an average particle size of preferably 1.0 mm or more, more preferably 1.2 mm or more, even more preferably 1.5 mm or more, and preferably 20 mm or less, more preferably 15 mm or less, even more preferably 10 mm or less, still more preferably 5 mm or less, and even more preferably 3 mm or less. The average particle size can be measured by calculating the equivalent spherical diameter of 250 particles using image analysis software ImageJ.

[0048] The bulk density of the perfume delivery particles of the present invention may be, from the viewpoint of the volume when a predetermined amount of particles is measured out, preferably 400 g / L or more, more preferably 500 g / L or more, even more preferably 600 g / L or more, and even more preferably 700 g / L or more, and from the viewpoint of ease of use and solubility during use, preferably 1000 g / L or less, more preferably 900 g / L or less. The bulk density can be measured using a bulk specific gravity measuring device in accordance with JIS K7365.

[0049] The perfume delivery particles of the present invention are produced by mixing components (A), (B), and (C). That is, the present invention relates to a method for producing perfume delivery particles by mixing component (A), component (B), and component (C). In the method for producing perfume delivery particles of the present invention, component (D) can be further mixed. In the method for producing perfume delivery particles of the present invention, the above-mentioned other ingredients can be further mixed. In the method for producing perfume delivery particles of the present invention, the embodiments described in the method for preventing discoloration of perfume delivery particles of the present invention and the perfume delivery particles of the present invention can be appropriately applied. Components (A), (B), (C), and (D) are the same as those described in the method for preventing discoloration of perfume delivery particles of the present invention and the perfume delivery particles of the present invention. In the method for producing fragrance delivery particles of the present invention, the amount of component (A), the amount of component (A1), the amount of component (A2), the mass ratio (A1) / [(A1)+(A2)] of the amount of component (A1) to the total amount of component (A1) and component (A2), the amount of component (B), the amount of component (B1), the amount of component (C), the mass ratio (C) / (A2) of the amount of component (C) to the amount of component (A2), and the amount of component (D) can be appropriately applied by replacing the content of each component with the amount of each component in the range of the contents and mass ratios of each component described for the fragrance delivery particles of the present invention.

[0050] The perfume delivery particles of the present invention contain components (A), (B), and (C), and by containing component (C), discoloration caused by component (B) can be suppressed. That is, the present invention relates to the use of component (C) for inhibiting discoloration caused by component (B) of perfume delivery particles containing components (A), (B), and (C). The perfume delivery particles may further contain component (D). The perfume delivery particles may further be mixed with other ingredients as described above for the perfume delivery particles of the present invention. The perfume delivery particles are the same as the perfume delivery particles of the present invention, and the embodiments described for the method for preventing discoloration of perfume delivery particles of the present invention and the perfume delivery particles of the present invention can be applied as appropriate. Components (A), (B), (C), and (D) are the same as those described for the method for preventing discoloration of perfume delivery particles of the present invention and the perfume delivery particles of the present invention.

[0051] Specifically, one method for producing perfume delivery particles of the present invention includes: Half of component (A1), component (A2), and component (C) are mixed at room temperature to obtain powder mixture (1). After heating powder mixture (1) to 75°C, the remaining half of component (A1) is added to obtain powder mixture (2). After the temperature of powder mixture (2) reaches 60°C, components (B) and (D) are added to powder mixture (2) and further mixed to obtain powder mixture (3). The obtained powder mixture (3) is extruded through a 2.0 mm pore size screen using an extrusion granulator (e.g., manufactured by Dalton Co., Ltd.) and granulated by compression molding. The obtained granules are then cooled and pulverized and sized using a power mill (e.g., manufactured by Dalton Co., Ltd.) to obtain flavor delivery particles.

[0052] The mixer used to mix component (A), component (B), component (C), and any optional components is not particularly limited as long as it can mix them substantially uniformly, and may be a mixer equipped with a heating means, such as a Henschel mixer (e.g., manufactured by Mitsui Mining Co., Ltd.), a high-speed mixer (e.g., manufactured by Fukae Kogyo Co., Ltd.), a ribbon mixer (e.g., manufactured by Tokuju Kogyosho Co., Ltd.), a Nauta mixer (e.g., manufactured by Hosokawa Micron Corporation), a V-type blender (e.g., manufactured by Dalton Corporation), and a container-rotating granulator (e.g., manufactured by Sugiyama Heavy Industries Co., Ltd.).

[0053] The mixture can be compression-molded to obtain granules using a known extrusion granulator such as a disc pelletizer (e.g., manufactured by Fuji Paudal Co., Ltd.), a basket-type granulator (e.g., manufactured by Kikusui Seisakusho Co., Ltd.), a granulator (e.g., manufactured by Hosokawa Micron Corporation), or the horizontal extrusion screw-type extrusion granulator described in JP-A-10-192688. A kneading extrusion device such as Extrude-O-Mix (e.g., manufactured by Hosokawa Micron Corporation) can also be used.

[0054] The granules are cooled to prevent the compression-molded product from coalescing or clumping, and then sized. The equipment used to size the extrusion granules is not particularly limited. That is, any known pulverizer (or crusher) can be used. Examples include high-speed mixers (e.g., manufactured by Fukae Industries Co., Ltd.), Marumerizers (e.g., manufactured by Fuji Paudal Co., Ltd.), Spiraflow (e.g., manufactured by Freund Corporation), Fitzmills (e.g., Dalton), Powermills (e.g., manufactured by Powrex Corporation), and Comils (e.g., manufactured by Quadro). From the viewpoint of the amount of fine powder generated and productivity, it is preferable to use a pulverizer such as a power mill with a knife cutter or a Comil, which crushes particles by pressing them against an impeller and a screen.

[0055] A power mill is a device disclosed in, for example, Japanese Patent Application Laid-Open No. 5-96195, and is shaped as shown in FIG. 1, and is a piece of equipment having a cutter blade 1 and a cylindrical screen 2. Particles fed into the power mill inlet fall freely within the power mill, and during this natural fall they are crushed and sized by the crushing blades attached to the cutter blade 1.

[0056] The Comill is a device disclosed in, for example, US Pat. No. 4,759,507, and has a configuration as shown in Fig. 2, and is equipped with an impeller 3 and a screen 4. Particles fed into the Comill inlet are pressed against the screen 4 by the centrifugal force generated by the rotating impeller 3. Small particles instantly rise on the vortex flow generated by the conical shape, and then, as they descend, they are crushed and sized by the impeller 3.

[0057] The perfume delivery particles of the present invention obtained by the method for preventing discoloration of perfume delivery particles of the present invention can be applied in the washing process of textile products. That is, the present invention can provide a method for perfumery of textile products, in which the perfume delivery particles are added to textile products during the washing process to treat the textile products.

[0058] When the perfume delivery particles of the present invention are added to textiles during the washing process, the amount of perfume delivery particles of the present invention added is preferably 3.0 g or more, more preferably 5.0 g or more, and preferably 16.0 g or less, more preferably 12.0 g or less per 1 kg of textiles. The textiles can be treated with the perfume delivery particles of the present invention alone, or they can be treated with a textile treatment composition containing the perfume delivery particles of the present invention.

[0059] When the perfume delivery particles of the present invention are added during the washing process of textile products, the perfume delivery particles of the present invention can be added to at least one of the washing water and rinsing water of the laundry, or the perfume delivery particles of the present invention can be added to both the washing water and rinsing water of the laundry.

[0060] When adding the perfume delivery particles of the present invention to the washing process of textile products, the perfume delivery particles are preferably added to the water at a concentration of 10 ppm or more, more preferably 100 ppm or more, and preferably 2,000 ppm or less, more preferably 1,000 ppm or less. From the viewpoint of convenience when adding to a washing machine, it is preferable to use them in the wash water, but it is also possible to add them to the rinse water. The wash water and rinse water for washing may contain laundry detergent components for textile products. [Example]

[0061] The components used in the Examples, Comparative Examples and Formulation Examples are listed below.

[0062] <Component (A)> Glauber's salt: sodium sulfate, manufactured by Shikoku Chemical Industry Co., Ltd. (ground Glauber's salt A0), component (A1) White carbon (silica): Amorphous silicate consisting of SiO2, manufactured by Tokuyama Corporation, component (A2)

[0063] <(B) component> Fragrance compositions: Fragrance compositions (b-1) to (b-3) composed of the fragrance compounds shown in Table 1 below

[0064] [Table 1]

[0065] <(C) component> Dextrin: Dextrin CZRM-X, manufactured by Nippon Starch Chemical Co., Ltd. Carboxymethylcellulose: Sodium carboxymethylcellulose, degree of etherification 0.44, manufactured by Nippon Paper Industries Co., Ltd. Cationic cellulose: JR-125 manufactured by Union Carbide Cornstarch: Japanese Pharmacopoeia Corn Starch, manufactured by Matsutani Chemical Industry Co., Ltd. <(D) component> Polyethylene glycol: Polyethylene glycol, molecular weight 8,200, manufactured by Kao Corporation

[0066] Preparation of Fragrance Delivery Particles Half of the (A1) component, the (A2) component, and the (C) component were mixed at room temperature in a Nauta mixer (NX-S model, manufactured by Hosokawa Micron Corporation) to obtain powder mixture (1). The jacket temperature was then raised to 90°C, and the temperature of powder mixture (1) was heated to 75°C. The remaining half of the (A1) component was then added. After the internal temperature reached 60°C, component (B) was added and mixed to obtain powder mixture (2). Next, pre-melted component (D) was added to powder mixture (2) and further mixed to obtain powder mixture (3). The resulting powder mixture (3) was then extruded through a 2.0 mm pore size screen in an extrusion granulator (EXR-60 model, manufactured by Dalton Corporation) and compacted. The resulting granules were then cooled and pulverized in a granulator (Power Mill, P-02S model, manufactured by Dalton Co., Ltd.) to obtain fragrance delivery particles with the composition shown in Table 2, with an average particle size of 1.5 mm and a bulk density of 800 g / L.

[0067] <Evaluation of discoloration of fragrance-delivery particles after storage> 20 g of each of the fragrance delivery particles prepared in Table 2 was placed in a No. 6 screw tube, sealed, and stored at 23°C / 40% RH for 180 days. Using a Spectro Photo Meter SE6000 (manufactured by Nippon Denshoku Industries Co., Ltd.), samples of each fragrance delivery particle were filled into a round cell before and after storage, and the b value (yellowness index) was measured. The Δb value, which indicates the degree of color change after storage, was calculated using the following formula (1). An increase in the Δb value indicates that the fragrance delivery particles have turned yellow. A smaller Δb value is preferable. A Δb value of less than 3.5 was rated E (Excellent) (the white appearance before storage was maintained or only a slight yellowing was observed after storage), a value of 3.5 or greater but less than 10 was rated G (Good) (a noticeable change from white to light yellow after storage), and a value of 10 or greater was rated B (Bad) (a clear change from white to dark yellow after storage). The results are shown in Table 2. Δb value = (b value of sample after storage - b value of sample before storage) (1) Even if the judgment is of the same level, for example, G, the lower the Δb value, the more preferable the embodiment.

[0068] [Table 2]

[0069] [Prescription example] Formulation examples of the fragrance delivery particles of the present invention are shown in Table 3. The fragrance delivery particles of these formulation examples can prevent discoloration during storage.

[0070] [Table 3]

Claims

1. A method for preventing discoloration of fragrance delivery particles by incorporating (C) a polysaccharide [hereinafter referred to as (C) component] into fragrance delivery particles containing (A) an inorganic excipient [hereinafter referred to as (A) component] and (B) a fragrance [hereinafter referred to as (B) component].

2. A method for preventing discoloration of fragrance delivery particles described in claim 1, wherein component (B) contains one or more fragrance compounds (hereinafter referred to as component (B1)) selected from fragrance compounds having an unsaturated bond and an aldehyde group or a ketone group, and the content of component (B1) in the fragrance delivery particles is 0.1% by mass or more and 10% by mass or less.

3. (B1) Ingredients: Ionone Beta, Cyclamen Aldehyde, ISOE Super, 1-(2,6,6-trimethyl-2-cyclohexen-1-yl)-2-buten-1-one, 1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-buten-1-one, 1-(2,6,6-trimethyl-3-cyclohexen-1-yl)-2-buten-1-one, 1-(5,5-dimethyl-cyclohexen-1-yl) 3. A method for preventing discoloration of fragrance delivery particles according to claim 2, wherein the fragrance compound is one or more fragrance compounds selected from the group consisting of 2,4-dimethyl-3-cyclohexene-1-carboxaldehyde, 3,5-dimethyl-3-cyclohexene-1-carboxaldehyde, and α-hexyl cinnamic aldehyde.

4. The method for preventing discoloration of perfume delivery particles according to claim 1 or 2, wherein component (C) is dextrin.

5. 3. The method for preventing discoloration of perfume delivery particles according to claim 1 or 2, wherein component (A) comprises a water-soluble inorganic excipient [hereinafter referred to as component (A1)].

6. 6. The method for preventing discoloration of perfume delivery particles described in claim 5, wherein component (A1) is one or more water-soluble inorganic excipients selected from alkali metal sulfates, alkaline earth metal sulfates, alkali metal hydrogen sulfates, alkaline earth metal hydrogen sulfates, alkali metal chlorides, and alkaline earth metal chlorides.

7. 6. The method for preventing discoloration of perfume delivery particles according to claim 5, wherein component (A) comprises a water-insoluble inorganic excipient (hereinafter referred to as component (A2)).

8. 8. The method for preventing discoloration of perfume delivery particles according to claim 7, wherein component (A2) is one or more water-insoluble inorganic excipients selected from silicon oxide and calcium silicate.

9. A method for preventing discoloration of fragrance delivery particles described in claim 7, wherein the mass ratio (A1) / [(A1)+(A2)] of the content of component (A1) to the total content of components (A1) and (A2) in the fragrance delivery particles is 0.8 or more and 1.0 or less.

10. A method for preventing discoloration of fragrance delivery particles described in claim 7, wherein the (C) component is contained so that the mass ratio (C) / (A2) of the content of the (C) component to the content of the (A2) component in the fragrance delivery particles is 0.15 or more and 2.0 or less.

11. Use of component (C) to inhibit discoloration caused by component (B) of fragrance delivery particles containing (A) an inorganic excipient (hereinafter referred to as component (A)), (B) a fragrance (hereinafter referred to as component (B)), and (C) a polysaccharide (hereinafter referred to as component (C)).

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