KR101532349B1 - pH buffer agent and fabric softner composition and detergent composition comprising thereof - Google Patents

Abstract

The present invention relates to a pH buffer containing an amine oxide compound represented by the following general formula (1), a fabric softener composition and a detergent composition comprising the same. The pH buffer of the present invention maintains the pH of the composition within a certain range. The pH buffer of the present invention maintains the pH of the fabric softener composition or detergent composition to be slightly acidic, effectively removes the cleaning component, increases the softening effect, and protects skin and fiber.

[Chemical Formula 1]

Amine oxides, pH buffering agents, fabric softening agents, detergents

Description

FIELD OF THE INVENTION The present invention relates to a pH buffering agent and a fabric softener composition and a detergent composition containing the same,

The present invention relates to a pH buffering agent, a fabric softening agent composition containing the same, and a detergent composition. More particularly, the present invention relates to a pH buffering agent for maintaining a pH within a predetermined range, And a detergent composition and a fabric softener composition capable of protecting the skin.

Examples of cationic softening agents for general household fabric softening agents include dialkyldimethylammonium salts, dialkylamidoimidazolinium salts, dialkylamidoammonium salts, dialkylamidoammonium salts, and the like, which have been reported in the American Chemical Society, Cationic surfactants are most commonly used. Such cationic surfactants tend to have an increased tendency to adsorb fibers in acidic environments. If the composition containing the cationic surfactants can be maintained acidic, the effect of fiber softening will be further increased.

In addition, since the skin is weakly acidic in hair products, body cleansers, kitchen detergents, and cleansing-type cosmetics commonly used in everyday life, its effect is increased when it is used in a weakly acidic condition.

However, since the fabric softener, the kitchen detergent, the shampoo, the rinse, the body cleanser, the cleansing cosmetics, etc. are diluted with water at the time of use, even if the pH of the product is made weakly acidic, Therefore, a large amount of acid may be contained in the product in order to keep the pH of the diluted solution slightly acidic. In this case, the pH of the product is highly acidic, so that the stability of the product is lowered and the irritation is increased.

In order to solve the above problems, an object of the present invention is to provide a pH buffer which keeps a pH within a certain range, a fabric softener composition which can effectively remove cleansing components, improve flexibility, protect fibers and skin, To provide a detergent composition.

According to an aspect of the present invention,

There is provided a pH buffer comprising an amine oxide-based compound represented by the following Formula 1:

[Chemical Formula 1]

(In the formula 1,

R ₁ , R ₂ and R ₃ are each independently C ₁ -C ₄ alkyl or hydroxyalkyl,

At least one of R ₁ , R ₂ and R ₃ is hydroxyalkyl.

The amine oxide-based compound represented by Formula 1 may be triethanolamine oxide.

According to another aspect of the present invention,

The present invention provides a fabric softener composition comprising the pH buffer.

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

The pH buffer can maintain the pH between 3 and 6.

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

The fabric softener composition may further comprise a cationic surfactant.

According to another aspect of the present invention,

And a pH buffering agent.

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

The pH buffer of the present invention, when used in a fabric softener composition or detergent composition, maintains the pH of the product at a slightly acidic level, thereby increasing the stability of the product and reducing the irritancy of the product. In addition, the pH buffer of the present invention can obtain sufficient pH buffering property even when a small amount is used.

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

The pH buffer of the present invention can adsorb to the skin and fibers to perform moisturizing and protecting functions.

The pH buffer of the present invention can be applied to all kinds of household goods such as fabric softener, shampoo, rinse, kitchen detergent, body cleanser, cleansing cosmetics.

Hereinafter, the present invention will be described in detail so as to be easily carried out by those skilled in the art.

The pH buffer of the present invention comprises an amine oxide-based compound represented by the following formula 1:

[Chemical Formula 1]

(In the formula 1,

R ₁ , R ₂ and R ₃ are each independently C ₁ -C ₄ alkyl or hydroxyalkyl, and at least one of R ₁ , R ₂ and R ₃ is hydroxyalkyl.

Amine oxide compounds of the formula (1) to accept the H ^+, under acidic conditions in the form of a general formula (2), and a base under conditions to adjust the H ⁺ released by the pH of the composition to the predetermined range:

(2)

In Formula 1 or 2, at least one of R ₁ , R _2, and R ₃ is hydroxyalkyl. That is, the amine oxide compound of the above formula contains at least one hydroxyalkyl group. Amine oxides which do not contain at least one hydroxyalkyl group are not easy to prepare 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 odor.

The amine oxide-based compound represented by Formula 1 may be triethanolamine oxide represented by Formula 3:

(3)

The triethanolamine oxide exhibits excellent buffering ability at pH 3 to 6.

The fabric softener composition of the present invention includes the pH buffer of the present invention. Therefore, even when the product contains a large amount of acid, the pH of the product can be maintained at a weak acidity of 3 to 6, and the pH of the product can be maintained to be slightly acidic even when it is diluted. Further, the cleaning component can be effectively removed and the fiber can be protected.

The pH buffer may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total composition. If it is contained in an amount of less than 0.1 part by weight, the pH buffering power is decreased, and if it is contained in an amount exceeding 5 parts by weight, the pH buffering power is not significantly increased compared to the added amount.

The pH buffer may be one having a high buffering power at pH 3 to 6. A pH buffer having a high buffering power at pH 3 to 6 can maintain the pH of the composition to be slightly acidic. The cleansing component used in general cleansing compositions has a basicity, so that in the case of a composition containing a buffer that keeps the pH of the composition slightly acidic, the cleansing component can be effectively neutralized and removed. In addition, since the amine oxide compound contained in the pH buffer exhibits weak acidity and cationicity, it can be adsorbed on an anionic fiber or skin to perform a moisturizing and protecting function.

The pH buffering agent contained in the fabric softener composition may include an amine oxide-based compound represented by the formula (1) having a molecular weight of 100 to 300. And preferably an amine oxide compound represented by the following formula (1) having a molecular weight of 100 to 200. When the molecular weight is less than 100, it can not contain at least one hydroxyalkyl group, and when the molecular weight is more than 300, the pH buffering power at a weak acidity is lowered. That is, the pH buffering ability at a slightly acidic range within the molecular weight range is excellent.

The fabric softener composition may comprise a cationic surfactant. The cationic surfactant is a component that imparts a softening effect. The cationic surfactant has an increased fiber adsorption ability under acidic conditions, so that the use of a pH buffer in a weakly acidic range can further increase the fiber softening effect. The cationic surfactant can be any of those known in the art without limitation, and specifically includes dialkyl dimethyl ammonium chloride of alkyl or alkenyl having 8 to 20 carbon atoms, dialkyl imidazolinium salt ( dialkyl imidazolium salt, dialkylamido quaternary ammonium salt, and ester quaternary type, or a mixture thereof may be used.

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

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

The pH buffer may be included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total composition. If it is contained in an amount of less than 0.1 part by weight, the pH buffering power is decreased, and if it is contained in an amount exceeding 5 parts by weight, the pH buffering power is not significantly increased compared to the added amount.

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 may be selected from the group consisting of a sulfuric acid ester salt of a higher alcohol having 8 to 22 carbon atoms, an alkylbenzenesulfonate, an alpha olefin sulfonate, an alpha sulfo fatty acid salt or an alkyl ester thereof and a saturated or unsaturated fatty acid having 8 to 22 carbon atoms Selected alone or a mixture thereof can be used. The nonionic surfactant may be a 1 to 20 moles adduct of ethylene oxide of a higher alcohol having 8 to 20 carbon atoms or an ethylene oxide / propylene oxide adduct polyoxyalkylene alkyl ether, a polyoxyalkylene alkylphenol ether, a polyoxyalkylene aryl Phenol ether, polyoxyalkylene fatty acid ester, polyoxyalkylene sorbitan fatty acid ester, polyoxyalkylene alkylamine, sorbitan fatty acid ester, alkyl alcohol amine and aryl alcohol amine, or a mixture thereof .

The detergent composition may be any detergent composition known in the art without limitation, and specifically includes shampoo, rinse, body cleanser, and cleansing cosmetics.

The pH buffer used in the detergent composition preferably maintains the pH of the composition at 3-6. This is because, as described above, the cleaning component is neutralized and is advantageous for removal of the cleaning component upon rinsing.

Also, the pH buffer used in the detergent composition includes the amine oxide compound represented by the formula (1) in which the molecular weight is 100 to 300, preferably 100 to 200. This is because the pH buffering ability in a slightly acidic range within the molecular weight range is excellent.

Hereinafter, the present invention will be described more specifically by way of examples. It is to be understood that the present invention is not limited by the scope of the present invention.

≪ Example 1 > Preparation of triethanolamine oxide

150 g of triethanolamine and 47.4 g of distilled water were placed in a reactor and stirred at 60 占 폚. 102.6 g of 35% strength hydrogen peroxide was added slowly for 1 hour with stirring. Thereafter, the mixture was stirred at 70 DEG C for 8 hours to prepare triethanolamine oxide, and a yield of about 95% was obtained. The yield of amine oxide was higher when hydrogen peroxide was added at 105 mol% based on the amine.

≪ Example 2 > Preparation of diethanol methylamine oxide

150 g of diethanol methylamine and 19.3 g of distilled water were placed in a reactor and stirred at 60 占 폚. 130.7 g of 35% strength hydrogen peroxide was added slowly for 1 hour while stirring. Then, the mixture was stirred at 70 DEG C for 8 hours to prepare diethanol methylamine oxide represented by the following formula (4), and a yield of about 95% was obtained:

[Chemical Formula 4]

≪ Examples 3 to 10 > Preparation of a fabric softener composition

A fabric softener composition comprising the triethanolamine oxide of Example 1 above was prepared according to the conventional method in the art according to the composition shown in Table 1 below. The units in Table 1 are 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: Dialkyl ester quaternary ammonium salt (manufactured by Cognis)

* PLA: polyoxyalkylene alkyl ether, alkyl is C ₁₂ , And a nonionic surfactant having an ethylene oxide addition mole number of 15 mol

< Example  11> Manufacture of shampoo

10 parts by weight of sodium laureate-2 sulfate, 1.8 parts by weight of cocamidopropyl betaine, 0.1 part by weight of sodium lauroyl lactate, 0.5 parts by weight of polyquaternium-10, 3.0 parts by weight of dimethicone, 0.3 part by weight of sodium chloride, -150 pentaerythrityl tetrastearate, 1 part by weight of the triethanolamine oxide of Example 1 above, and purified water was prepared by a conventional method known in the art.

&Lt; Comparative Examples 1 to 3 > Preparation of a fabric softener composition

A fabric softener composition not containing triethanolamine oxide was prepared from the compositions shown in Table 2 below. The units in Table 2 are 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 Triethanolamine oxide 0 0 0 Purified water Balance Balance Balance

< Experimental Example  1> Triethanol Amine oxide pH  Measuring buffer capacity

The pH buffering capacity of the triethanolamine oxide prepared in Example 1 was measured. 1.81 g of triethanolamine oxide (TEAO, 55.4%) was diluted in 80 g of distilled water, and the pH was changed according to the amount of 0.1 N HCl and 0.1 N NaOH. The results are shown in Fig.

According to FIG. 1, as the amount of HCl was increased, the pH was decreased and the acidity was increased. However, the rate of increase of pH was not greater than the amount of HCl input, and even when the amount of HCl was more than 60 ml,

In addition, according to FIG. 1, the pH tends to increase with an increase in the amount of NaOH, but the pH did not significantly increase even when the amount of NaOH was more than 60 ml.

From the above results, it can be seen that the pH buffer containing the triethanolamine oxide maintains the pH between 3 and 6. [

EXPERIMENTAL EXAMPLE 2 Measurement of pH Buffer Capacity of Triethanolamine Oxide

The fabric softener compositions of Examples 3 to 10 and Comparative Examples 1 to 3 were adjusted to pH 3.1 to 3.3 using citric acid. Next, the compositions of Examples 3 to 6 and Comparative Example 1 were prepared by dissolving 0.67 g of each of the compositions prepared in a 1 L general formula, and measuring the pH change. The compositions of Examples 7 to 10 and Comparative Examples 2 to 3 were prepared by dissolving 2 g each of the compositions prepared in a 1 L general formula, and then measuring the pH change. 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 at dilution 6.87 6.54 6.28 6.07 7.28

* Dilution condition: 0.67 g / l, general constant

According to the above Table 3, the compositions of Examples 3 to 6 including triethanolamine oxide were slightly acidic even when diluted with water, whereas the compositions of Comparative Example 1 which did not contain triethanolamine oxide showed an increase in pH It became a neutral area.

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 at dilution 6.08 6.03 7.26 5.01 7.27 7.25

* Dilution condition: 2.0 g / l, general constant

According to the above Table 4, the compositions of Examples 7 to 10 containing triethanolamine oxide maintained a slightly acidic pH when diluted with water, but the compositions of Comparative Examples 2 to 3 without triethanolamine oxide had acidic areas .

2 is a graph showing the change in pH depending on the content of triethanolamine oxide. As shown in FIG. 2, the pH is maintained acidic as the content of triethanolamine oxide is increased. In the case of Example 3 in which the content of triethanolamine oxide is less than 0.5 part by weight, the pH buffering action is also exhibited in the weakly acidic region .

From the above results, it can be seen that triethanolammonium oxide has a pH buffering ability which keeps the pH of the composition slightly acidic and an excellent pH buffering ability even with a small amount.

&Lt; Experimental Example 3 >

Flexibility tests were performed on the fabric softener compositions of Examples 7 to 10 and Comparative Examples 2 to 3. Four soft towels were cleaned by a basic course (two rinsings) of a drum washing machine (TROMM DD Inverter 10 kg WD-TR101P, LG), and the fabric softener compositions of Examples 7 to 10 and Comparative Examples 2 to 3 After the addition of 40 g, an additional rinse was performed. After that, sensory evaluation was conducted on 10 skilled panelists. The evaluation of softness was carried out after letting the panel recognize the standard towel at 1 point for general laundry detergent and 3.7 for fabric softener at general use. 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

Table 5 shows that the compositions of Examples 7 to 10 containing triethanolamine oxide, which is the pH buffer of the present invention, are more flexible than the comparative compositions using a cationic surfactant alone. In addition, in the case of Comparative Example 3, although the triethanolamine oxide was not contained, the content of the cationic surfactant was higher than that of Comparative Example 2.

<Experimental Example 4> Evaluation of pH buffering ability according to molecular weight

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

3 shows that triethanolamine oxide having a low molecular weight exhibits a high buffering range at a pH of 3 to 6, and dimethylstearylamine oxide having a pH of 4 to 7 and a molecular weight of 300 or more has a pH of 5 to 9, And a buffer zone in the alkali.

Further, triethanolamine oxide used about 60 ml or more of HCl, whereas dimethylstearylamine oxide used 30 ml of HCl, so that the lower the molecular weight, the better the buffering ability.

FIG. 1 shows the results of measuring the pH buffering ability of triethanolamine oxide when HCl and NaOH were added.

Figure 2 is a graph showing the pH change during dilution of the composition with triethanolamine oxide content.

FIG. 3 shows the results of comparative measurement of pH buffering capacities of triethanolamine oxide, dimethyl lauryl amine oxide, and dimethyl stearyl amine oxide when HCl was added.

Claims (9)

A pH buffering agent comprising an amine oxide-based compound represented by the following formula (1): [Chemical Formula 1]

(In the formula 1, R ₁ , R ₂ and R ₃ are each independently C ₁ -C ₄ alkyl or hydroxyalkyl, At least one of R ₁ , R ₂ and R ₃ is hydroxyalkyl. The method according to claim 1, Wherein the amine oxide-based compound represented by Formula 1 is triethanolamine oxide. A fabric softener composition comprising the pH buffer of claim 1 or 2. The method of claim 3, Wherein the pH buffer maintains the pH of the composition at 3 to 6. The method of claim 3, Wherein the amine oxide compound represented by Formula 1 has a molecular weight of 100 to 300. The method of claim 3, Wherein the pH buffering agent is included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total composition. 5. The method of claim 4, Wherein the fabric softener composition further comprises a cationic surfactant. A detergent composition comprising the pH buffer of claim 1 or 2. 9. The method of claim 8, Wherein the pH buffer is included in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the total composition.

Images