KR20100129918A - Ph buffer agent and fabric softner composition and detergent composition comprising thereof - Google Patents

Abstract

PURPOSE: A PH buffer agent keeping the PH of composition in a specified range is provided to increase the stability of the product by maintaining the pH of product in the weak acidity. CONSTITUTION: A triethanol amine 150g and distilled water 47.4g put into in a reactor. The triethanol amine and distilled water are mixed in figure 60. The hydrogen peroxide 102.6g of 35% concentration slowly puts into for an hour. In mixture is figure 70, it is mixed for 8 hours. A triethanol amineoxide is manufactured. In case the hydrogen peroxide puts into about triethanolammine in 105 mol, the yield of the triethyl amine oxide is improved.

Description

pH buffer and fabric softener composition and detergent composition comprising same {pH buffer agent and fabric softner composition and detergent composition comprising

The present invention relates to a pH buffer and a fabric softener composition and a detergent composition comprising the same, and more particularly, to a pH buffer for maintaining a pH in a certain range, and to effectively remove the cleaning ingredients including the same, to improve the flexibility and fiber And cleaning agent compositions and fabric softener compositions capable of protecting the skin.

As cationic flexible components of common household fabric softeners, dialkyldimethyl ammonium salts, dialkylamido imidazolinium salts, and dialkylamido ammonium salts as reported in the American Chemical Society JACOS 61,367 (1984) and 65,1682 (1988). Cationic surfactants, such as these, are the most used. Such cationic surfactants tend to increase the fiber adsorptivity in acid, so that the fiber softening effect will be increased if the composition containing the cationic surfactant can be kept acidic.

In addition, hair products commonly used in daily life, body cleanser, dishwashing detergent or cosmetics of cleansing, etc., because the skin is weakly acidic, the effect is increased when used in mildly acidic conditions.

However, the fabric softener, dishwashing detergent, shampoo, rinse, body cleanser, cleansing cosmetics, etc. are diluted in water during use, so even if the pH of the product is produced with a weak acidity, it is diluted to a low concentration during use to show neutrality. Therefore, a large amount of acid may be included in the product to keep the pH of the diluent weakly acidic. In this case, the pH of the product has a high acidity, thereby lowering the stability of the product and increasing the irritation.

In order to solve the above problems, an object of the present invention is to provide a pH buffer for maintaining a pH in a certain range and a fabric softener composition that can effectively remove the cleaning components, including the same, improve flexibility and protect fibers and skin and It is to provide a detergent composition.

According to an aspect of the present invention,

It provides a pH buffer comprising an amine oxide compound represented by the formula (1):

[Formula 1]

(In Chemical Formula 1,

R ₁ , R ₂ and R ₃ are each independently C ₁ to C ₄ alkyl or hydroxy alkyl,

At least one of R ₁ , R ₂ and R ₃ is hydroxy alkyl.)

The amine oxide compound represented by Chemical Formula 1 may be triethanol amine oxide.

The present invention to achieve another object of the present invention,

It provides a fabric softener composition comprising the pH buffer.

The pH buffer may be included in 0.1 to 5 parts by weight based on 100 parts by weight of the total composition.

The pH buffer may maintain a pH of 3 to 6.

The amine oxide compound represented by Chemical Formula 1 may have a molecular weight of 100 to 300.

The fabric softener composition may further comprise a cationic surfactant.

The present invention to achieve another object of the present invention,

It provides a detergent composition comprising the pH buffer.

The pH buffer of the present invention can maintain the pH of the composition in a range.

When used in the fabric softener composition or the detergent composition, the pH buffer of the present invention keeps the pH of the product weakly acidic to increase the stability of the product and reduce the irritation of the product. In addition, the pH buffer of the present invention can obtain sufficient pH buffer even with a small amount.

The pH buffer of the present invention effectively removes the cleaning ingredients from the cleaning composition or the fabric softener composition and increases the fiber softening effect.

PH buffer of the present invention can be adsorbed on the skin and fibers to perform the moisturizing and protective functions.

PH buffering agent of the present invention is applicable to the general household goods such as fabric softener, shampoo, rinse, dish detergent, body cleanser, cleansing cosmetics.

Hereinafter, the present invention will be described in detail so that those skilled in the art can easily practice.

PH buffer of the present invention includes an amine oxide compound represented by the following formula (1):

[Formula 1]

(In Chemical Formula 1,

R ₁ , R ₂ and R ₃ are each independently C ₁ to C ₄ alkyl or hydroxy alkyl, and at least one of R ₁ , R ₂ and R ₃ is hydroxy alkyl.)

The amine oxide compound of Formula 1 is present in the form of Formula 2 by receiving H ⁺ under acidic conditions, and releases H ⁺ under basic conditions to adjust the pH of the composition to a certain range:

[Formula 2]

At least one of R ₁ , R ₂ and R ₃ in Formula 1 or 2 is hydroxy alkyl. That is, the amine oxide compound of Formula 1 includes at least one hydroxy alkyl group. Amine oxide-based compounds that do not contain at least one hydroxy alkyl group are not easy to manufacture due to the low boiling point of the unreacted tertiary amine and are not suitable for use in detergent compositions or fabric softener compositions due to odors.

The amine oxide compound represented by Formula 1 may be triethanol amine oxide of Formula 3 below:

(3)

The triethanol amine oxide shows excellent buffering capacity at pH 3-6.

The fabric softener composition of the present invention comprises the pH buffer of the present invention. Therefore, even if a large amount of acid is included in the product, the pH of the product can be maintained at a weak acidity of 3 to 6, and even when diluted, the pH of the product can be maintained at a weak acidity. In addition, the cleaning component can be effectively removed and the fibers can be protected.

The pH buffer may be included in 0.1 to 5 parts by weight based on 100 parts by weight of the total composition. When included in less than 0.1 part by weight pH buffer capacity is reduced, when included in more than 5 parts by weight is not effective because the pH buffer capacity is not significantly increased compared to the amount added.

The pH buffer may be used having a high buffering force at pH 3 to 6. pH buffers having a high buffering force at pH 3 to 6 can maintain the pH of the composition in weak acidity. Since the cleaning component used in general cleaning detergent compositions is basic, in the case of a composition including a buffer for maintaining the pH of the composition at a weak acidity, the cleaning component can be effectively neutralized and removed. In addition, since the amine oxide compound included in the pH buffer exhibits cationicity in weak acidity, it can be adsorbed on fibers or skin having anionic properties to perform moisturizing and protective functions.

The pH buffer included in the fabric softener composition may include an amine oxide compound represented by Formula 1 having a molecular weight of 100 to 300. Preferably may include an amine oxide compound represented by the formula (1) having a molecular weight of 100 to 200. If the molecular weight is less than 100 it may not include at least one or more hydroxy alkyl groups, and if the molecular weight exceeds 300 will lower the pH buffering capacity in weak acidity. That is, the pH buffering ability at weak acidity is excellent in the said molecular weight range.

The fabric softener composition may comprise a cationic surfactant. The said cationic surfactant is a component which gives a softening effect. Since the cationic surfactant increases the fiber adsorptivity under acidic conditions, it may further increase the fiber softening effect when using a pH buffer in the weakly acidic region. The cationic surfactant can be used without limitation, those known in the art, specifically, dialkyl dimethyl ammonium chloride, dialkyl imidazolinium salt of alkyl or alkenyl having 8 to 20 carbon atoms ( Dialkyl imidazolium salt, dialkylamido quaternary ammonium salt and ester quaternary type may be used alone or in a mixture thereof.

In addition, the fabric softener composition may include components commonly used in the fabric softener composition in addition to the above components.

The detergent composition of the present invention comprises the pH buffer of the present invention.

The pH buffer may be included in 0.1 to 5 parts by weight based on 100 parts by weight of the total composition. When included in less than 0.1 part by weight pH buffer capacity is reduced, when included in more than 5 parts by weight is not effective because the pH buffer capacity is not significantly increased compared to the amount added.

The detergent composition may comprise a single or a mixture thereof selected from the group consisting of cationic surfactants, anionic surfactants and nonionic surfactants. The cationic surfactant is the same as described above. The anionic surfactant is selected from the group consisting of sulfuric ester salts, alkylbenzene sulfonates, alphaolefin sulfonates, alpha sulfo fatty acid salts or alkyl ester salts thereof of 8 to 22 carbon atoms and saturated or unsaturated fatty acids having 8 to 22 carbon atoms. Selected alone or mixtures thereof can be used. The nonionic surfactants include ethylene oxide 1 to 20 molar adducts or ethylene oxide / propylene oxide adducts of higher alcohols having 8 to 20 carbon atoms, polyoxyalkylene alkyl ethers, polyoxyalkylene alkyl phenol ethers, and polyoxyalkylene aryls. Phenol ethers, polyoxyalkylene fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene alkylamines, sorbitan fatty acid esters, alkylalcoholamines and arylalcoholamines may be used alone or in mixtures thereof. Can be.

The detergent composition may be any detergent composition known in the art, and there is no limitation, and specifically, the shampoo, rinse, body cleanser, cleansing cosmetics and the like.

The pH buffer used in the detergent composition is preferably to maintain the pH of the composition to 3 to 6. As described above, this is because it is advantageous to remove the cleaning component when neutralizing the cleaning component and rinsing.

In addition, the pH buffer used in the cleaning composition includes a molecular weight of the amine oxide compound represented by the formula (1) is 100 to 300, and preferably includes 100 to 200. It is because pH buffering ability in weak acidity is excellent in the said molecular weight range.

Hereinafter, the present invention will be described in more detail with reference to Examples. This is only for the purpose of explanation of the present invention, which is not intended to limit the scope of the present invention.

Example 1 Preparation of Triethanol Amine Oxide

150 g of triethanol amine and 47.4 g of distilled water were put into a reactor and stirred at 60 ° C. 102.6 g of hydrogen peroxide at a concentration of 35% was slowly added for 1 hour with stirring. Thereafter, the mixture was stirred at 70 ° C. for 8 hours to prepare triethanol amine oxide, and a yield of about 95% was obtained. When hydrogen peroxide was added in an amount of 105 mol% based on the amine, the yield of amine oxide was high.

Example 2 Preparation of Ethanol Methyl Amine Oxide

150 g of diethanolmethyl amine and 19.3 g of distilled water were placed in a reactor and stirred at 60 ° C. 130.7 g of hydrogen peroxide at a concentration of 35% was slowly added for 1 hour while stirring. Subsequently, the mixture was stirred at 70 ° C. for 8 hours to prepare diethanolmethyl amine oxide of Formula 4, which yielded about 95%.

[Formula 4]

<Examples 3 to 10> Preparation of Fabric Softener Composition

To prepare a fabric softener composition comprising the triethanol amine oxide of Example 1 according to a conventional method in the art according to the composition of Table 1. The unit in Table 1 is parts by weight.

Example
3 Example
4 Example
5 Example
6 Example 7 Example 8 Example 9 Example 10 EQ 5.0 5.0 5.0 5.0 7.5 8.0 8.0 8.0 Inorganic salt 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 PLA 0.7 0.7 0.7 0.7 0.7 0.7 0.7 0.7 Triethanolamine oxide 0.5 1.0 1.5 2.0 1.0 1.0 0.1 5 Purified water Balance Balance Balance Balance Balance Balance Balance Balance

* EQ: dialkylester quaternary ammonium salt (manufactured by Cognis)

PLA: polyoxyalkylene alkyl ether, alkyl is C ₁₂ Nonionic surfactant having an added mole number of 15 mol of ethylene oxide

< Example  11> Preparation of Shampoo

10 parts by weight of sodium laureth-2 sulfate, 1.8 parts by weight of cocamidopropyl betaine, 0.1 parts by weight of sodium lauroyl lactylate, 0.5 parts by weight of polyquaternium-10, 3.0 parts by weight of dimethicone, 0.3 parts by weight of sodium chloride, PEG A shampoo comprising 0.2 parts by weight of -150 pentaerythrityl tetrastearate, 1 part by weight of triethanol amine oxide of Example 1, and purified water was prepared by a conventional method known in the art.

Comparative Examples 1 to 3 Preparation of Fabric Softener Composition

To prepare a fabric softener composition containing no triethanol amine oxide in the composition of Table 2. The unit in Table 2 is parts by weight.

Comparative Example 1 Comparative Example 2 Comparative Example 3 EQ 5.0 8.0 8.5 Inorganic salt 0.1 0.1 0.1 PLA 0.7 0.7 0.7 Triethanol Amine Oxide 0 0 0 Purified water Balance Balance Balance

< Experimental Example  1> Triethanol Amine oxide pH  Buffer capacity measurement

The pH buffering capacity of the triethanol amine oxide prepared in Example 1 was measured. After diluting 1.81 g of triethanol amine oxide (TEAO, 55.4%) in 80 g of distilled water, the pH change was measured according to the input amount of 0.1N HCl and 0.1N NaOH. The results are shown in FIG.

According to FIG. 1, the pH decreases as the amount of HCl is increased, and the acidity is increased. However, the increase rate of pH is not large compared to the amount of HCl, and even when the amount of HCl is more than 60 ml, the pH does not decrease significantly at 3.

In addition, according to FIG. 1, the pH tended to increase with increasing NaOH input, but the pH did not increase significantly even when the NaOH input exceeded 60 ml.

It can be seen from the results that the pH buffer containing triethanol amine oxide maintains the pH between 3 and 6.

Experimental Example 2 Measurement of pH Buffer Capacity of Triethanol Amine Oxide

The fabric softener compositions of Examples 3 to 10 and Comparative Examples 1 to 3 were made to have the same pH of 3.1 to 3.3 using citric acid. Subsequently, in the compositions of Examples 3 to 6 and Comparative Example 1, 0.67 g of each of the compositions prepared in 1 L of the general constant was added and dissolved, and then the pH change was measured. The compositions of Examples 7 to 10 and Comparative Examples 2 to 3 were dissolved in 2 g of the composition prepared in 1 L of general constant, and then the pH change was measured. The results are shown in Tables 3 and 4 below.

Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Initial pH 3.10 3.10 3.12 3.11 3.11 PH when diluted 6.87 6.54 6.28 6.07 7.28

* Dilution condition: 0.67g / ℓ, general constant

According to Table 3, the pH of the compositions of Examples 3 to 6 including triethanol amine oxide was weakly acidic even when diluted in water, whereas the pH of the composition of Comparative Example 1 not containing triethanol amine oxide was increased. It became a neutral zone.

Example 7 Example 8 Example 9 Example 10 Comparative Example 2 Comparative Example 3 Initial pH 3.27 3.25 3.25 3.26 3.21 3.16 PH when diluted 6.08 6.03 7.26 5.01 7.27 7.25

* Dilution condition: 2.0g / ℓ, general constant

According to Table 4, the composition of Examples 7 to 10 containing triethanol amine oxide maintained a weakly acidic pH when diluted in water, but the compositions of Comparative Examples 2 to 3 not containing triethanol amine oxide were acidic. Out of the box.

Figure 2 is a graph showing the pH change according to the content of triethanol amine oxide. According to Figure 2, it can be seen that as the content of the triethanol amine oxide increases pH is kept acidic, even in Example 3 containing 0.5 parts by weight of the relatively small triethanol amine oxide has a pH buffering effect in the weakly acidic region It can be seen.

It can be seen from the above results that triethanol amioxide has a pH buffering ability to maintain the pH of the composition in weak acidity, and exhibits excellent pH buffering ability even with a small content.

Experimental Example 3 Evaluation of Flexibility

Flexibility evaluation was performed about the fabric softener compositions of Examples 7-10 and Comparative Examples 2-3. Evaluation of the softness, after washing four towels in the basic course of the drum washing machine (TROMM DD Inverter 10kg WD-TR101P, LG) (twice rinsing), the fabric softener composition of Examples 7 to 10 and Comparative Examples 2 to 3 After adding 40 g, a further rinsing was performed. After that, sensory evaluation was conducted on 10 experienced panelists. When washing with only a general detergent was 1 point, when using a fabric softener in a general washing machine to 3.7 points to let the panel to recognize the reference towel, the softness was evaluated. The results are shown in Table 5 below.

Example 7 Example 8 Example 9 Example 10 Comparative Example 2 Comparative Example 3 Flexibility
(softness) 3.59 3.63 3.25 3.69 3.26 3.53

According to Table 5, it can be seen that the softening effect of the composition of Examples 7 to 10 containing triethanol amine oxide which is the pH buffer of the present invention than the comparative composition using a cationic surfactant alone. In addition, in the case of Comparative Example 3 does not include triethanol amine oxide, but the content of the cationic surfactant is high, it seems that the flexibility is higher than Comparative Example 2.

Experimental Example 4 Evaluation of pH Buffer Capacity According to Molecular Weight

The pH buffering ability of the amine oxides was measured and compared. Samples used for the measurement were triethanol amine oxide having a molecular weight of 165, dimethyl lauryl amine oxide having a molecular weight of 229, and dimethyl stearyl amine oxide having a molecular weight of 313 prepared in Example 1. After diluting 1 g of each sample in 80 g of distilled water, the pH change was measured according to the amount of 0.1 N HCl, and the results are shown in FIG. 3.

Figure 3 shows a low molecular weight triethanol amine oxide has a high buffer region at pH 3 to 6, dimethyl lauryl amine oxide is pH 4-7, dimethyl stearyl amine oxide having a molecular weight of 300 or more neutral pH 5-9 And buffer regions in alkali.

In addition, while the triethanol amine oxide uses more than about 60 mL of HCl, dimethyl stearyl amine oxide is 30 mL of HCl, it can be seen that the lower the molecular weight, the better the buffer capacity.

1 is a result of measuring the pH buffering capacity of triethanol amine oxide when HCl and NaOH.

Figure 2 is a graph showing the pH change when diluting the composition according to the triethanol amine oxide content.

Figure 3 is the result of comparing the pH buffering capacity of triethanol amine oxide, dimethyl lauryl amine oxide, dimethyl stearyl amine oxide when HCl is added.

Claims (9)

PH buffer comprising an amine oxide compound represented by the formula (1): [Formula 1]

(In Chemical Formula 1, R ₁ , R ₂ and R ₃ are each independently C ₁ to C ₄ alkyl or hydroxy alkyl, At least one of R ₁ , R ₂ and R ₃ is hydroxy alkyl.) The method of claim 1, PH buffer, characterized in that the amine oxide compound represented by the formula (1) is triethanol amine oxide. A fabric softener composition comprising the pH buffer of claim 1. The method of claim 3, The pH buffer is a fabric softener composition, characterized in that to maintain the pH of the composition from 3 to 6. The method of claim 3, Fiber softener composition characterized in that the molecular weight of the amine oxide compound represented by the formula (1) is 100 to 300. The method of claim 3, The pH buffer is a fiber softener composition, characterized in that it comprises 0.1 to 5 parts by weight based on 100 parts by weight of the total composition. The method of claim 4, wherein The fabric softener composition, wherein the fabric softener composition further comprises a cationic surfactant. A detergent composition comprising the pH buffer of claim 1. The method of claim 8, The pH buffer is a detergent composition, characterized in that included in 0.1 to 5 parts by weight based on 100 parts by weight of the total composition.

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