JPH10131042A - Fiber-treating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inexpensive fiber-treating composition excellent in safety for human bodies, large in the adsorption of chemical agents to fibers in a process for rinsing a washed wear, and having an excellent deodorizing effect on malodors generated from human bodies, thereby useful as a softening and finishing agent, etc., and capable of imparting a high deodorizing effect to the wear, etc. SOLUTION: This fiber-treating composition is obtained by dispersing bimolecular membrane multi-layered structure microsomes encapsulating at least one antioxidant selected from dibutylhydroxytoluene, butylhydroxyanisole, tocopherol, tocotrienol and an alkyl ascorbate ester in an amount of 0.3-10wt.% based on the whole amount of the composition in an aqueous phase. When a wear treated with this composition as a finishing agent is worn, the deodorizing effect is persisted for a long time, and the odor of sweat is suppressed. The treatment of socks with the finishing agent enables to inhibit the unpleasant odor of feet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber treatment composition capable of imparting an excellent deodorizing effect to clothing by using it as a softening agent or the like.

[0002]

2. Description of the Related Art It is known that odor-causing substances emitted from the human body are generated by oxidative decomposition of sebum and the like contained in sweat and the like by microorganisms on the skin surface. ing. Therefore, as mechanisms for suppressing the generation of substances causing odor in the human body, (1) it is difficult to sweat, (2) the activity of skin surface microorganisms is suppressed,
(3) A method of inhibiting oxidative degradation of sweat and sebum is effective.

[0003] Among them, the method (2) uses an antibacterial agent and a bactericide capable of suppressing the activity of microorganisms. Japanese Patent Application Laid-Open No. 4-222280 discloses an antibacterial and deodorizing garment using quaternary ammonium salts.
There has been proposed an antibacterial agent using an antibacterial agent such as chitosan or a water-soluble chitosan derivative.

[0004] However, these antibacterial agents are expensive and have problems in terms of safety to the human body. Further, in the above proposal, it has been difficult to efficiently attach the agent used as the antibacterial agent to the fiber in the washing rinsing step.

On the other hand, in the above method (3), it is considered effective to use an antioxidant. In this case, the antioxidant is usually compounded in the conventional finishing agent for clothing,
Since the antioxidant blended here is intended to prevent deterioration of the fiber-treated product, the amount used is small (usually 0.1%
The following compounding amounts) have not yet achieved their own deodorizing function.

The present invention has been made in view of the above circumstances, is excellent in safety to the human body, is inexpensive, and has a high adsorptivity of an antioxidant to fibers in a washing rinsing step. An object of the present invention is to provide a fiber treatment composition having an excellent deodorizing effect against malodors emitted from the human body.

[0007]

Means for Solving the Problems and Embodiments of the Invention As a result of diligent studies to achieve the above object, the present inventor has found that dibutylhydroxytoluene, butylhydroxyanisole, tocopherol, tocotrienol and alkyl ascorbic acid are used. At least one chosen
Dispersing vesicles having a bilayer multilayer structure containing 0.3 to 10% by weight of the total composition of antioxidants in an aqueous phase, in this case, in particular, a film capable of forming a bilayer multilayer structure After forming a liquid crystal composition by kneading a system consisting of a forming component, the above antioxidant, and a part of an aqueous phase at a temperature equal to or higher than the phase transition point of the film forming component while applying high shear thereto. By adding and mixing the remaining amount of the aqueous phase to the liquid crystal composition to form a vesicle dispersion in which the antioxidant is incorporated in a bilayer multilayer structure comprising film-forming components, thereby preparing a human body. In addition to being excellent in safety to the skin, it is inexpensive, and also has a high adsorption of antioxidants to the fibers in the washing rinsing process, has an excellent deodorant effect against the stench emitted from the human body, and has a flexible finish. By using it as an agent etc., it can give a high deodorant effect to clothing etc. It found that fiber treatment composition that can be obtained, leading to completion of the present invention.

The mechanism for suppressing the generation of offensive odor in the fiber treatment composition of the present invention is considered to be related to the above (3), but the details of the mechanism for suppressing the odor are not clear.

Conventionally, a fiber treatment composition containing an antioxidant such as tocopherol and a hindered phenol antioxidant is disclosed in JP-A-55-22024 and JP-A-55-22224.
Nos. 025 and 61-187920, JP-A-2-210
No. 067, No. 8-120563, etc., a specific antioxidant is encapsulated in a vesicle having a multilayer structure of a bilayer membrane, and this is mixed with a fiber treatment composition and adhered to clothing. It is possible to suppress the bad smell from the human body by
They are not described in these proposals and are new findings by the present inventors.

Hereinafter, the present invention will be described in more detail. The fiber treatment composition of the present invention is obtained by dispersing vesicles having a multilayer structure of a bilayer membrane containing a specific antioxidant in an aqueous phase. is there.

As the antioxidant, oil-soluble ones among those generally called antioxidants are used. Specifically, one kind selected from the following compounds may be used alone, or two or more kinds may be used in combination. used. Synthetic antioxidant: dibutylhydroxytoluene (BH
T), butylhydroxyanisole (BHA). Natural antioxidants: tocopherol, tocotrienol, alkyl ascorbate (stearate,
Oleate etc.).

As the antioxidant, dibutylhydroxytoluene, butylhydroxyanisole and tocopherol are particularly preferably used.

The compounding amount of the above antioxidant is 0.3 to 10% (% by weight, hereinafter the same) of the whole composition, preferably 1 to 10%.
When the amount is less than 0.3%, a sufficient deodorizing effect cannot be obtained, and when the amount exceeds 10%, it is difficult to be included in the vesicles having a bilayer multilayer structure.

The membrane-forming components capable of forming vesicles having a bilayer multilayer structure include, for example, cationic surfactants,
Nonionic surfactants, phospholipids and the like can be used.

Examples of the cationic surfactant include cationic surfactants such as quaternary ammonium salts, tertiary amine salts, imidazoline salts, imidazolinium salts, and amino acid-based cationic surfactants represented by the following general formula (1). One or more selected from agents are used, and a mixture of the above cationic surfactant and a higher alcohol represented by the following general formula (2) can also be suitably used. Ammonium salts are preferred.

[0016]

Embedded image (Where R ¹ is an alkyl group or alkenyl group having 10 to 24 carbon atoms, R ² is an alkyl group having 1 to 3 carbon atoms, an alkyl group or alkenyl group having 10 to 24 carbon atoms,
¹ and R ² may each be unsubstituted;
It is divided by a functional group such as CONH- or -COO-
It may be substituted with a functional group such as H. R ³ has 1 carbon atom
And R ⁴ is an alkyl group having 1 to 3 carbon atoms or a benzyl group, and X is a halogen atom or a monoalkyl sulfate group. R ⁵ —OH (2) (wherein, R ⁵ is an alkyl group having 12 to 22 carbon atoms)

Specific examples of the quaternary ammonium salt of the formula (1) include stearyltrimethylammonium chloride, distearyldimethylammonium chloride, dodecyltrimethylammonium chloride, ditallowalkyldimethylammonium bromide, dioleyldimethylammonium chloride, and oleyltrimethyl. Amino acid-based cationic surfactants such as ammonium chloride include coconut oil fatty acid L-arginine ethyl-DL-
Examples thereof include pyrrolidone carboxylic acid and 4-guanidinobutyl lauryl amide acetic acid. As tertiary amine salts,
Distearylmethylamine hydrochloride, dioleylmethylamine hydrochloride, distearylmethylamine sulfate, etc. are exemplified. In the case of these tertiary amine salts, the alkyl chain is represented by -COO-, -CONH- or the like. It may be separated by a functional group. Examples of the imidazoline salt include 1-octadecanoylaminoethyl-2-heptadecylimidazoline hydrochloride and 1-octadecenoylaminoethyl-2-yl.
As imidazolinium salts such as heptadecenyl imidazoline hydrochloride, methyl-1-tallowamidoethyl-2-tallowalkylimidazolinium methyl sulfate, methyl-
Examples thereof include 1-hexadecanoylamidoethyl-2-pentadecylimidazolinium chloride and ethyl-1-octadecenoylamidoethyl-2-heptadecenylimidazolinium ethyl sulfate. Further, examples of the higher alcohol of the formula (2) include cetostearyl alcohol, dodecyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol and the like. These film-forming components can be appropriately selected depending on the use and purpose of the manufactured vesicle dispersion liquid.

On the other hand, nonionic surfactants include polyethoxylated fatty alcohols, glycerol monofatty acid esters, polyethylene glycol fatty acid esters, sorbitan fatty acid esters, polyethoxylated sorbitan fatty acid esters, and the like. Phospholipids include phosphatidylcholine, Phosphatidylethanolamine, sphingomilin and the like.

The amount of the film-forming component used is preferably 1 to 30%, particularly 2 to 20% of the whole composition, and if less than 1%, film formation may not be possible. Formation may be difficult.

Further, the ratio of the film-forming component to the antioxidant is
30: 1 to 1: 1, more preferably 20: 1 to 1 by weight
The ratio is preferably in the range of 2: 1, more preferably 10: 1 to 2: 1. If it exceeds 30: 1, the amount of the antioxidant is small and the deodorizing efficiency is poor. It becomes difficult to include an antioxidant in the endoplasmic reticulum.

In the present invention, in order to facilitate film formation by the above-mentioned film-forming components, an organic solvent such as a polyhydric alcohol such as ethylene glycol, propylene glycol or glycerin or a lower alcohol such as ethanol or isopropyl alcohol is used together with the film-forming components. Solvents and additives such as fatty acids such as stearic acid and oleic acid and various emulsifiers such as polyoxyethylene alkyl ether, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester can be blended in usual amounts.

Further, in addition to the above antioxidant, as an oil component,
Hydrophobic oils commonly used in textile treatment compositions such as clothing finishes can be blended, for example, synthetic oils such as silicone oils, cyclic silicones, modified silicones, liquid paraffin, liquid isoparaffin, paraffin wax, etc. Mineral oil, vegetable oils such as jojoba oil, olive oil, olive squalane, castor oil, carnauba wax, animal oils such as lanolin, squalane, mink oil,
Hexyl laurate, isopropyl palmitate, oleic acid, stearic acid and the like can be mentioned. If necessary, oil-soluble antibacterial / bactericides such as triclosan, hinokitiol, triclocarban, isopropylmethylphenol, butylparaben, propylparaben Oil-soluble preservatives such as benzoic acid, benzoic acid, salicylic acid, and sorbic acid; oil-soluble flavors such as linalool, citronellol, geraniol, and geranyl acetate; and other oil-soluble U
V absorbers, insect repellents, humectants, etc. can be mentioned, and these can be used alone or in combination of two or more.

The amount of the oil used is preferably about 0.1 to 20% with respect to the entire dispersion, and the ratio of the oil containing the antioxidant to the film-forming component is preferably Is desirably 1: 1 or less, and if the oil content exceeds the film-forming component, the inclusion in the bilayer multilayer structure may be insufficient. When the melting point of the oil used is high, it may be used by dissolving it in an organic solvent such as a lower alcohol as described above or another liquid oil.

Examples of the aqueous phase component include, in addition to water, emulsifiers, dispersion stabilizers, low-temperature stabilizers, inorganic salts, pigments, and various other water-soluble active ingredients. Specifically, nonionic surfactants such as polyoxyethylene nonylphenyl ether, polyoxyethylene octyl phenyl ether, glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, and fatty acid polyethylene glycol as emulsifiers, Dispersion stabilizers such as polyacrylic acid, carboxymethylcellulose and carboxyvinyl polymer; low-temperature stabilizers such as ethylene glycol, propylene glycol and glycerin; and inorganic salts such as sodium chloride, calcium chloride and other hydrochlorides, and sodium sulfate and other sulfates. Acid Red 13 as a dye
8, Acid Blue 9, Acid Yellow 141, Reactive Blue, and other various water-soluble active ingredients include antibacterial agents such as isothiazolone and antioxidants such as hydroxyethanediphosphonic acid. The amount of the aqueous phase component can be a normal amount.

The fiber-treating composition of the present invention may be prepared by mixing a film-forming component with an antioxidant and other oil components if necessary and emulsifying and dispersing the mixture in an aqueous phase. May be separately emulsified and dispersed in an aqueous phase with an antioxidant and other oil components to be blended if necessary.However, a film-forming component of the endoplasmic reticulum, an antioxidant, and other oil phase components may be used. At a temperature equal to or higher than the phase transition point of the film-forming component, a system composed of a part of the aqueous phase is kneaded in a state where high shear is applied to form a liquid crystal composition. It is preferable to produce the vesicle dispersion in which the antioxidant is incorporated into the bilayer multilayer structure by adding and mixing the remaining amount.

Here, the liquid crystal composition must be formed at a temperature not lower than the phase transition temperature (Tc) of the film forming component. If the liquid crystal composition formation temperature is lower than Tc, no liquid crystal is formed. The temperature difference between the liquid crystal composition formation temperature and Tc is not particularly limited, and can be appropriately selected within a temperature range in which liquid crystal can be formed. Usually, the liquid crystal composition formation temperature is higher than Tc. 5-20 ° C, especially 10-1
It is desirable that the temperature be higher by about 5 ° C.

The amount of the aqueous phase mixed with the oil containing the above film forming component and the above antioxidant to form the liquid crystal composition is appropriately selected depending on the kind of the film forming component and the oil used. Usually, 10% of the total amount of aqueous phase used
Oil phase in the liquid crystal composition (oil containing the film-forming component and the antioxidant): water phase = 2: 1
A ratio of 1: 2 is preferred. When the film-forming component, the oil component, and a part of the aqueous phase are mixed, the order of adding them in the container is not particularly limited, and they may be added all at once.

The type of the apparatus for kneading by adding high shear while mixing the above components is not particularly limited.
Considering that the viscosity of the system increases as the liquid crystal composition is formed, it is desirable that the system be capable of mixing the high-viscosity material as a whole and have blades with high shearing force.

The types of stirring devices can be broadly classified into two types: devices capable of securing the above-mentioned stirring characteristics by one set of blades and devices capable of ensuring the above-mentioned stirring characteristics by plural sets of blades. The shearing applied separately to the above devices will be described.

First, an apparatus capable of ensuring the entire mixing and high shearing force with one set of blades will be described with reference to the drawings. In the case of this type of apparatus, as shown in FIG. 1, the shearing force is usually dominated by the peripheral speed of the tip of the blade 2 in the stirring tank 1 in consideration of the stirring characteristics. The power of rotation of the blades 2 per unit liquid volume in the entirety 1 and the discharge flow rate of the blades 2 per unit liquid volume in the entire stirring tank 1 are dominant. Therefore, in order to add high shear in the present invention, it is necessary to pay attention to the peripheral speed at the tip of the blade 2,
In the case of the present invention, the level of the peripheral speed Ut [m / s] at the tip of the blade 2 is 5 m / s or more, preferably 7 m / s or more and 25 m / s or less, more preferably 10 m or more regardless of the size of the device. / S to 25 m / s, high shear can be added. The peripheral speed Ut at the tip of the blade 2 can be calculated by the following equation.

Ut = π × n × dn: blade rotation speed [rps], d: blade diameter [m]

In this case, the degree of shearing can be defined by the peripheral speed Ut, but in order to secure the total mixing force, it is necessary to consider a factor relating to the size of the apparatus, and for that purpose, it is defined by the following equation. Desirably, it is defined by the apparent shear rate.

Apparent shear rate = Ut / (D−d) Ut: shear rate [m / s], d: blade diameter [m], D: stirring tank diameter [m]

In the case of an ordinary kneading apparatus, if the peripheral speed Ut at the tip of the blade 2 is kept constant, the blade 2 becomes larger as the apparatus becomes larger.
The distance between the agitator and the stirring tank 1 increases, and the value of the apparent shear rate decreases. When the high shear of the present invention is defined by using such an apparent shear rate, the apparent shear rate is preferably about 100 to 1000 [s ^-1 ].

In order to simultaneously secure the shearing force and the overall mixing, it is preferable to set the ratio d / D of the blade diameter d to the stirring tank diameter D to 0.7 or more. The upper limit is preferably 0.9 or less. As a specific device having such stirring characteristics, for example, a line mixer, a power mixer, a spiral mixer, or the like is preferably used.

Next, as shown in FIG. 2, the apparatus provided with a plurality of sets of blades is one in which blades 2 capable of applying high shear and a stator 3 having an inner diameter D 'surrounding the blades 2 are entirely mixed. A device provided with a scraping-type blade 4 that can perform the cleaning is used. In the case of such a device, in order to apply the high shear of the present invention, the peripheral speed Ut [m / s] of the tip of the blade 2 is required.
Is 5 m / s or more, preferably 7 m / s or more.
m / s or less, more preferably 10 m / s or more and 25 m / s
The apparent shear rate calculated by using the inner diameter D 'of the stator 3 in place of D is 1,000
It is preferable to set it to about 10,000 [s ^-1 ]. In addition, in the case of a device provided with a plurality of sets of blades, as shown in FIG. 3 separately from the above-described device, a blade 2 capable of normally applying high shear and a scraping type blade 4 capable of performing overall mixing are provided. A device provided with is also used. In the case of such a device, in order to apply the high shear of the present invention, it is necessary to pay attention to the peripheral speed at the tip of the blade 2 as described above, and the degree is 5 m.
/ S, preferably 7 m / s or more and 25 m / s or less, more preferably 10 m / s or more and 25 m / s or less, whereby high shear can be added.

In the apparatus having a plurality of sets of blades as described above, examples of the blades 2 capable of imparting the stirring characteristics include a homomixer and a disper mixer.
Usually, the ratio d / D between the blade diameter and the stirring tank diameter is 0.2
Considering that the viscosity of the system increases as the liquid crystal composition is formed, it is insufficient to mix the entire stirring tank with only the blades 2.
Therefore, a scraping-type blade 4 suitable for mixing a high-viscosity material is suitably used. In this case, in order to efficiently supply a liquid to the blade 2 to which high shear is applied, a scraping-type blade 4 is required. It is preferable to add a flow of 1 m / s or more as the peripheral speed at the tip of the blade 4.

As a specific device having these stirring characteristics, it is preferable to use, for example, an azihomomixer, a backflow mixer, a hybrid mixer, or the like.

According to the present invention, by such a kneading step,
A liquid crystal composition is formed from a mixed liquid composed of a film forming component, an oil containing the antioxidant, and a part of an aqueous phase. Whether or not the liquid crystal composition is formed in this step depends on the liquid crystal composition. When an object is formed, the viscosity of the system becomes as high as several hundreds to several tens of thousands P (poise), and it can be confirmed using this change in viscosity.

The system on which such a liquid crystal composition was formed was frozen and then cut, and the cut surface was removed from the mold.
By observing with a transmission electron microscope, the existence of a multilayer structure can be confirmed. This multilayer structure is formed by a bilayer and a water layer formed by a film-forming component. In this case, the molecules of the film-forming component are arranged with their hydrophobic groups directed toward the inside of the film. Is considered to be dispersed in minute units between the hydrophobic groups of such two molecules.

Further, the liquid crystal composition and the remainder of the aqueous phase are mixed to obtain a liquid in which desired vesicles are dispersed. In this case, it is possible to produce the mixture at a temperature lower than the phase transition temperature of the film-forming component, but it is preferable to perform the mixing at a temperature higher than the phase transition temperature in consideration of the solidification of the film-forming component. The order of adding the liquid crystal composition and the remaining aqueous phase is not particularly limited, and they may be added simultaneously, for example. The shearing force in the mixing / dispersing step is not particularly limited, and may be the same as the shearing force in the ordinary emulsifying and dispersing step, that is, the normal use range of a machine used for ordinary emulsifying and dispersing. In this case, in consideration of the fact that the viscosity of the liquid crystal composition is high, it is desirable to lengthen the residence time and increase the time required for shearing.

Therefore, in the mixing / dispersion step of the present invention, a usual apparatus for emulsification and dispersion is used. As such an apparatus, a high-shear type dispersion apparatus is usually used. Examples thereof include a homomixer, a milder, a clear mix, a line mixer, an azimuth mixer, a homomic line flow, a disper mixer, and a backflow mixer. These may be used alone or in combination of two or more. You may. In this case, since the viscosity of the system is about several tens to several hundreds cP (centipoise), the scraping blade may or may not be provided.

Incidentally, a dye or the like may be further added to the vesicle dispersion liquid obtained in the above step, and cooling may be performed after the dispersion step. Further, the temperature in the finishing step (the step in which the vesicle dispersion liquid is formed) may be higher than the transition point of the film-forming component, or lower than the phase transition point, and the bilayer of the bilayer multilayer structure is solidified. State.

The vesicle dispersion can be used as it is as a fiber treatment composition such as a finishing agent for clothing.

[0045]

Industrial Applicability The fiber treatment composition of the present invention is excellent in safety to the human body, is inexpensive, and has a high adsorptivity of the drug to the fibers in the washing rinsing step, resulting in a bad odor from the human body. It has an excellent deodorizing effect, and can be used as a softening agent to impart a high deodorizing effect to clothing and the like. Therefore, when the garment treated with this finish is worn, the deodorant effect lasts for a long time, and the odor is suppressed even when sweat is applied. When the sock is treated with this finish, the unpleasant odor of the feet is suppressed.

[0046]

EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples. In addition, all% in each example are weight%.

Examples and Comparative Examples A fiber treatment composition (finish) having the composition shown in Table 1 was prepared by the following method, and the composition was tested for dibutylhydroxytoluene described in the following Cosmetic Prima. , A test for confirming the adsorption of the antioxidant in the rinsing step and an evaluation of the deodorant function were performed. Table 1 shows the results.

[Preparation method of fiber treatment composition] The film forming component, antioxidant and oil phase and a part of the aqueous phase (film forming component, antioxidant and aqueous phase component ratio to oil phase of 160%) were mixed with 50%. ° C and kneaded under high shear to prepare a liquid crystal composition. The remaining aqueous phase which was previously heated to 50 ° C (the phase transition temperature of the film-forming component + 13 ° C) was subjected to high shear. The mixture was added and mixed to obtain a predetermined finish.

For liquid crystal formation, a line mixer was used, d / D = 0.8, the peripheral speed Ut of the blade tip = 9 m / s,
D−d = 0.013 m, apparent shear rate Ut / (D−
d) = 692S ⁻¹ , stirring time = 1 minute, and a homomixer was used for addition / mixing (dispersion).

The vesicles of the obtained composition were confirmed as follows. The confirmation dispersion of vesicles was observed by 600-fold with orthogonal polarization conditions with a polarizing microscope, examining whether the cross Nicol image appeared indicating the presence of vesicles with bilayer multilayer structure, the determination of the following Judged by criteria. 〇: Cross Nicol is visible over a wide range ×: Cross Nicol is not visible [Confirmation test method] BHT (dibutylhydroxytoluene)
Alternatively, a diluted ferric chloride solution (1N ferric chloride solution 2) is added to 1 ml of an aqueous solution containing BHA (butylhydroxyanisole).
No water is formed by adding 4 drops of water to 100 ml), but the color of the liquid becomes red when small crystals of α, α'-dipyridyl are further added. The adsorption of the antioxidant (BHT or BHA) in the rinsing step was evaluated. Test method 1 kg of clothing (short sleeved shirt) and 30 tap water in a commercial washing machine
Liters and commercial detergents (Lion Corporation High Top)
Add 20 g, wash for 10 minutes, dehydrate the clothes for 1 minute,
Next, rinsing was performed twice with 30 liters of tap water for 10 minutes. At the time of this second rinsing, the fiber treatment composition 6.6 m
1 was added.

For comparison, a test was conducted in which BHT was simply dispersed in water during the second rinsing in the same manner (BHT was the same amount as above).

Based on the above confirmation test, the amount of residual BHT in the second rinse was determined by coloring the liquid according to the following criteria. 〇: no color ×: red color

[Test method of deodorant function] A fiber treatment composition (finishing agent) was applied to the left foot of the sock, and a commercially available softener (Sofran C manufactured by Lion Corporation) was applied to the right foot of the sock using a washing machine (1 kg of sock). 6.6 ml of finishing agent, water 30
(Liter, temperature: 25 ° C.), and 10 panelists were allowed to wear them for 8 hours, and then the panelists sensory-evaluated the odor of the left and right socks according to the following criteria. Sensory evaluation criterion ：: More than half out of 10 people evaluated that they did not smell better than the processed products. Δ: 3 to 4 out of 10 people evaluated that they did not smell better than the commercial product. ×: Two or less out of ten people evaluated that they did not smell better than the commercial product.

[0054]

[Table 1]

In the test for confirming the adsorption of the antioxidant, as a result of the above test, the fiber treatment composition of the present invention (B
HT or BHA wrapped in a bilayer multilayered vesicle) did not show any color, but those in which BHT was simply dispersed in water turned red. Therefore, it was found that in the composition of the present invention, almost all of the BHT added to the rinsing liquid was adsorbed on the clothes.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of an apparatus for forming a liquid crystal composition.

FIG. 2 is a schematic sectional view showing another example of an apparatus for forming a liquid crystal composition.

FIG. 3 is a schematic sectional view showing another example of an apparatus for forming a liquid crystal composition.

Continuation of front page (72) Inventor Kentaro Takayama 1-3-7 Honjo, Sumida-ku, Tokyo Inside Lion Corporation

Claims (2)

[Claims] 1. An antioxidant selected from dibutylhydroxytoluene, butylhydroxyanisole, tocopherol, tocotrienol and alkyl ascorbic acid in an amount of from 0.3 to 10 based on the total amount of the composition.
What is claimed is: 1. A fiber treatment composition comprising: a bilayer multilayered vesicle enclosing by weight% dispersed in an aqueous phase. 2. A kneading system comprising vesicles comprising a film-forming component, an antioxidant and a part of an aqueous phase under high shear at a temperature not lower than the phase transition point of the film-forming component. 2. The fiber treatment composition according to claim 1, which is prepared by adding a remaining amount of an aqueous phase to the liquid crystal composition after forming the liquid crystal composition.