JP3419001B2 - Surfactant composition - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a sulfosuccinic acid type surfactant composition having excellent storage stability.

[0002]

2. Description of the Related Art Conventionally, sulfosuccinic acid type surfactants are
While it has the advantage of being less irritating to the skin, it has a problem that it is susceptible to hydrolysis and storage stability is poor. In order to solve such a problem, one or two of citric acid or its alkali metal salt or inorganic phosphoric acid (salt) is added to a system consisting of a sulfosuccinic acid type surfactant and a sulfosuccinate.
A composition containing at least one species has been proposed (JP-A-3-203999).

[0003]

However, in the above composition, the sulfosuccinate salt which does not inherently have the surface active ability and becomes an impurity in the surfactant composition and the phosphorus compound which causes eutrophication are present. In addition, the improvement of storage stability is not sufficient, etc.
There is room for improvement.

[0004]

Means for Solving the Problems As a result of intensive studies, the inventors of the present invention have formulated a salt having a specific structure as a result of proposing a sulfosuccinic acid type surfactant composition having remarkably improved storage stability. As a result, they found that a predetermined effect was obtained, and completed the present invention based on such findings.

The aqueous solution surfactant composition according to the present invention has the general formula (1): [In the formula, R ¹ represents an alkyl group having 8 to 22 carbon atoms, an alkenyl group, or Represents R ² represents an alkyl group or an alkenyl group having 8 to 22 carbon atoms, and R ³ represents a hydrogen atom or a methyl group. A
O represents oxyalkylene having 2 to 4 carbon atoms, and n is 0 to
An integer of 30 is shown. X ¹ and X ² are hydrogen atoms or When one is a hydrogen atom, the other is Is. M ¹ and M ² are the same or different and each represents a hydrogen atom, an alkali metal, ammonium or monoethanolamine,
Diethanolamine, triethanolamine, propano
Selected from the group
A lower alkanolamine residues that. To sulfosuccinate surfactant purity 100 parts by weight represented by, general formula (2) [In the formula, M ³ represents an alkali metal or ammonium. ] And a carbonate represented by the general formula (3) Wherein, ^{M 4} has the same meaning as ^{M 3} in the general formula (2). ] One or two selected from the group consisting of hydrogen carbonates represented by
More than one salt (hereinafter collectively referred to as "combined salt") 0.1 to 1
It is characterized by being mixed with 5 parts by weight.

The sulfosuccinic acid type surfactant represented by the general formula (1) is obtained by esterifying maleic anhydride with an aliphatic alcohol or an aliphatic amide alcohol or an alkylene oxide adduct thereof, for example. It is a compound obtained by sulfonating an esterified product with sulfite.

The aliphatic alcohol has 8 to 2 carbon atoms.
Two straight or branched chain saturated or unsaturated alcohols may be mentioned. Specific examples thereof include alcohols having groups such as octyl, nonyl, decyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, octadecyl, eicosyl, docosyl, hexadecenyl, octadecenyl, docosenyl. Either natural or synthetic alcohol may be used. Among them, preferable alcohols include linear alcohols having 10 to 16 carbon atoms, synthetic alcohols having a branched structure having 12 to 15 carbon atoms, and mixtures thereof.

Examples of the aliphatic amide alcohol include compounds obtained by reacting a linear or branched saturated or unsaturated fatty acid having 8 to 22 carbon atoms with monoethanolamine or isopropanolamine. Specifically, octanoylaminoethyl, decanoylaminoethyl, dodecanoylaminoethyl, tridecanoylaminoethyl, tetradecanoylaminoethyl, pentadecanoylaminoethyl, hexadecanoylaminoethyl, octadecanoylaminoethyl, Eicosanoylaminoethyl, docosanoylaminoethyl, hexadecenoylaminoethyl, octadecenoylaminoethyl, docosenoylaminoethyl,

Octanoylaminoisopropyl, decanoylaminoisopropyl, dodecanoylaminoisopropyl, tridecanoylaminoisopropyl, tetradecanoylaminoisopropyl, pentadecanoylaminoisopropyl, hexadecanoylaminoisopropyl, octadecanoylaminoisopropyl, eicosa Noylaminoisopropyl, docosanoylaminoisopropyl,
Examples thereof include alcohols having a group such as hexadecenoylaminoisopropyl, octadecenoylaminoisopropyl, and docosenoylaminoisopropyl. Among them, preferred as alcohol is aminoethanol having a fatty acid residue having 10 to 16 carbon atoms.

Examples of the alkylene oxide include ethylene oxide, propylene oxide and butylene oxide, which may be used alone or in combination of two or more kinds.
The method of adding two or more alkylene oxides may be block or random. The number of added moles (n) is an integer of 0 to 30. Examples of preferable adducts include 0-10 adducts of ethylene oxide.

M ¹ and M ² represent a hydrogen atom, an alkali metal, ammonium or a lower alkanolamine residue, specifically, lithium, sodium, potassium, monoethanolamine residue, diethanolamine residue, triethanolamine. Residues, propanolamine residues and isopropanolamine residues are exemplified, among which sodium,
Potassium and ammonium are recommended.

M ³ and M ⁴ represent an alkali metal or ammonium. Particularly, ammonium, sodium and potassium are preferable.

The total amount of the salt used in combination according to the present invention is 0.1 to 15 parts by weight, preferably 0.5 to 5.0 parts by weight based on 100 parts by weight of the pure sulfosuccinic acid surfactant. It is about part by weight. If the amount is less than 0.1 part by weight, the predetermined stabilizing effect is difficult to be recognized, and even if the amount is more than 15 parts by weight, a remarkable improvement in the stabilizing effect is not recognized, and the amount of impurities increases, which is not preferable.

The surfactant composition according to the present invention is usually
It is used in combination with other surfactants and the like, and is useful as a surfactant component of detergents such as shampoo and body shampoo.

[0015]

EXAMPLES The present invention will be specifically described below with reference to Examples and Comparative Examples. The storage stability was evaluated based on the reduction of the active ingredient and the appearance when the predetermined surfactant composition was allowed to stand at 50 ° C. for 1 month. The active ingredient was measured by "Epton method", and the reduction rate was calculated based on the following formula.

[Equation 1]

Example 1 Polyoxyethylene (3EO) dodecyl sulfosuccinate
To 25% by weight aqueous solution 100g of disodium, was added sodium carbonate 0.18g and sodium hydrogen carbonate 0.07 g (salt addition of 1.0 wt%), the storage stability of the resulting surfactant composition The evaluation was that the active ingredient reduction rate was 3.4% and the appearance was transparent.

Example 2 Polyoxyethylene (2EO) alkyl sulfosuccinate
Diammonium (alkyl = C12 or C13
(35% by weight ) of a 35% by weight aqueous solution of a residue of a synthetic alcohol having a branched chain, 0.35 g of potassium carbonate and 0.35 g of potassium hydrogen carbonate were added (salt addition rate: 2.0% by weight) to obtain When the storage stability of the surfactant composition was evaluated, the active ingredient reduction rate was 3.2% and the appearance was transparent.

Example 3 Polyoxyethylene (3EO) alkyl sulfosuccinate
Dipotassium [alkyl = dodecyl alcohol / tetrade
Mixed alcohol of syl alcohol / hexadecyl alcohol
(Residue of weight ratio: 70/20/10)] to 100 g of a 30% by weight aqueous solution of sodium carbonate, 0.18 g of sodium carbonate and 0.42 g of sodium hydrogen carbonate were added (salt addition ratio: 2.
When the storage stability of the obtained surfactant composition was evaluated, the active ingredient reduction rate was 3.4% and the appearance was transparent.

Example 4 Polyoxyethylene (2EO) alkyl sulfosuccinate
Monosodium [alkyl = dodecyl alcohol / tetra
Mixed alcohol of decyl alcohol (weight ratio: 70/3
0) residue] to 100 g of a 30% by weight aqueous solution of ammonium carbonate 0.54 g and ammonium hydrogen carbonate 0.36
When the storage stability of the obtained surfactant composition was evaluated, the effective component reduction rate was 3.3% and the appearance was transparent.

Example 5 Polyoxyethylene sulfosuccinate (5EO) dodecano
To 25% by weight aqueous solution 100g of yl ethanolamide disodium, was added sodium carbonate 0.18g and sodium hydrogen carbonate 0.07 g (salt addition of 1.0 wt%), the resulting surfactant composition When the storage stability was evaluated, the active ingredient reduction rate was 3.1% and the appearance was transparent.

Example 6 Polyoxyethylene (3EO) dodecyl sulfosuccinate
When 0.38 g of sodium carbonate was added to 100 g of a 25% by weight aqueous solution of disodium (salt addition rate: 1.5% by weight), the storage stability of the obtained surfactant composition was evaluated. The rate was 3.4% and the appearance was transparent.

[0022]

Example 7 Polyoxyethylene (3EO) dodecyl sulfosuccinate
To 25% by weight aqueous solution 100g of disodium, sodium bicarbonate was added 0.50 g (salt addition rate 2.0% by weight) was evaluated for storage stability of the resulting surfactant composition, the active ingredient The reduction rate was 3.3% and the appearance was transparent.

Comparative Example 1 When the storage stability of the aqueous surfactant solution according to Example 1 was evaluated except that sodium carbonate and sodium hydrogen carbonate were not added, the active ingredient reduction rate was 10.3% and the appearance was cloudy. It was

Comparative Example 2 A surfactant composition obtained in the same manner as in Example 2 except that 0.70 g of sodium citrate was added in place of potassium carbonate and potassium hydrogen carbonate was evaluated for storage stability. The active ingredient reduction rate was 10.9% and the appearance was cloudy.

Comparative Example 3 Surfactant composition obtained in the same manner as in Example 3 except that 0.005 g of sodium carbonate and 0.010 g of sodium hydrogencarbonate were added as combined salts (salt addition rate: 0.05% by weight). Was evaluated for storage stability, the active ingredient reduction rate was 8.7%.
The appearance was slightly cloudy.

[0027]

By adding a predetermined amount of salt according to the present invention, the storage stability can be greatly improved as compared with the conventional sulfosuccinic acid type surfactant.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-103294 (JP, A) JP-A-2-151697 (JP, A) JP-A-2-151698 (JP, A) JP-A-2- 182967 (JP, A) JP 62-148599 (JP, A) JP 63-316721 (JP, A) JP 64-6095 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C11D 1/28 A61K 7/075 A61K 7/50 C11D 3/10

Claims (2)

(57) [Claims] 1. The general formula (1) [In the formula, R ¹ represents an alkyl group having 8 to 22 carbon atoms, an alkenyl group, or Represents R ² represents an alkyl group or an alkenyl group having 8 to 22 carbon atoms, and R ³ represents a hydrogen atom or a methyl group. A
O represents oxyalkylene having 2 to 4 carbon atoms, and n is 0 to
An integer of 30 is shown. X ¹ and X ² are hydrogen atoms or When one is a hydrogen atom, the other is Is. M ¹ and M ² are the same or different and each represents a hydrogen atom, an alkali metal, ammonium or monoethanolamine,
Diethanolamine, triethanolamine, propano
Selected from the group
A lower alkanolamine residues that. To sulfosuccinate surfactant purity 100 parts by weight represented by, general formula (2) [In the formula, M ³ represents an alkali metal or ammonium. ] Or a carbonate represented by the general formula (3) Wherein, ^{M 4} has the same meaning as ^{M 3} in the general formula (2). ] 0.1-15 weight part of 1 type or 2 types or more of the salt selected from the group which consists of the hydrogencarbonate represented by these is mix | blended, The aqueous-solution-type surfactant composition characterized by the above-mentioned. 2. A sulfosuccinic acid represented by the general formula (1).
With 100 parts by weight of pure surfactant, the general formula (2) is used.
Carbonate represented or hydrogencarbonate represented by the general formula (3)
0.1 or more of one or more salts selected from the group consisting of
~ 15 parts by weight of an aqueous interface characterized by being blended
A method of improving the storage stability of an activator composition.