KR101896025B1 - Liquid detergent composition with excellent storage stability - Google Patents

Abstract

The present invention relates to a liquid detergent composition which is excellent in stability against microorganisms during long-term storage, and is characterized by containing an anionic surfactant, an inorganic salt and an amino acid. The liquid detergent composition according to the present invention can prevent deterioration in stability due to propagation of microorganisms and decay, even during long-term storage.

Description

[0001] The present invention relates to a liquid detergent composition having excellent storage stability,

The present invention relates to a liquid detergent composition having excellent stability against microorganisms in production, circulation and use, and more particularly to a liquid detergent composition having excellent preservative effect against bacteria, yeast, and halomonas, And a liquid detergent composition which does not cause deterioration in phase stability.

Generally, liquid detergent is released in containers or pouches, so it is blocked from external environment, but it can come into contact with external environment when it is used in manufacturing process or consumer. In this case, inflow of microorganisms from the external environment can not be avoided. If the liquid detergent contaminated with the microorganism has a weak preservative effect on the microorganism, the stability of the product such as the deterioration is lowered. In particular, it is necessary to develop a liquid detergent composition capable of microbial control, since consumer safety may be a threat to consumer safety when a product containing dangerous microbes propagates to a human body such as pathogenic bacteria.

As a means for imparting a preservative effect, various preservatives such as a synthetic preservative including isothiazolinone and the like, a food preservative containing sodium benzoate and the like, and an extract extracted from various plants are used.

Synthetic preservatives such as isothiazolinone are the most commonly used preservatives because of their small preservative spectrum and excellent preservative effect. However, as the safety issue of synthetic preservatives has increased recently, legal sanctions for synthetic preservatives have been strengthened. Products that do not use synthetic preservatives have been increasing for consumer safety.

Food preservatives such as sodium benzoate are safe for humans but are effective at pH below neutrality, have no effect at weaker alkalinity, and are ineffective against some microorganisms. Also, it uses a large amount of synthetic preservative, puts a lot of burden on prescription cost, and the stability of product is lowered.

Plant extracts are also more expensive than synthetic preservatives and have a higher cost than food preservatives.

In Korean Patent No. 10-0952642, anionic surfactant and inorganic salt are used as the phase-stable liquid detergent composition, but since they do not contain an amino acid, they have a disadvantage in improving cleaning ability and preservative effect.

It is an object of the present invention to overcome the above-mentioned problems, and it is an object of the present invention to provide a liquid detergent composition which has excellent preservative effect on microorganisms not only neutral but weak alkalis, will be.

According to an aspect of the present invention,

(a) a linear alkyl benzene sulfonic acid salt (LAS) having 10 to 14 carbon atoms; And an anionic surfactant represented by the following formula (1); At least one of them;

(b) 5 to 20% by weight of an inorganic salt; And

(c) 0.1 to 5% by weight of an amino acid; ≪ RTI ID = 0.0 > a < / RTI > liquid detergent composition.

≪ Formula 1 >

R ₁ -OXY-SO ₃ -Z

Wherein R ₁ is C ₈ to C ₁₆ straight chain alkyl or alkenyl, branched chain alkyl or alkenyl and X is (C ₂ H ₄ O) _n wherein n is an integer from 1 to 15, Y is (C ₃ H ₆ O) _m , where m is an integer from 0 to 5 and Z is an alkali metal, an alkaline earth metal ion, a C ₁ to C ₃ alkanolamine, and a salt having a cationic polarity of an alkylalkanolamine Lt; / RTI >

The liquid detergent according to the present invention is excellent in preservative effect against microorganisms even in the case of weak alkalis, and does not cause deterioration of deterioration and phase stability.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a liquid detergent composition having excellent stability against microorganisms in production, circulation and use, and more particularly to a liquid detergent composition having excellent stability against bacteria, yeast, and halomonas, It is possible to provide a liquid detergent composition which does not cause deterioration in phase stability.

In the present invention, the liquid detergent composition comprises (a) an anionic surfactant, (b) an inorganic salt, and (c) an amino acid.

(a) anionic surfactant

In the present invention, the (a) anionic surfactant is a linear alkyl benzene sulfonate (LAS) having 10 to 14 carbon atoms; And an anionic surfactant represented by the following formula (1); ≪ / RTI >

≪ Formula 1 >

R ₁ -OXY-SO ₃ -Z

Wherein R ₁ is C ₈ to C ₁₆ straight chain alkyl or alkenyl, branched chain alkyl or alkenyl,

Wherein X is (C ₂ H ₄ O) _n wherein n is an integer from 1 to 15 and Y is (C ₃ H ₆ O) _m wherein m is an integer from 0 to 5 and Z is an alkali metal, Earth metal ion, a C ₁ to C ₃ alkanolamine, and a salt having a cationic polarity of an alkylalkanolamine)

The anionic surfactant (a) is preferably a linear alkylbenzenesulfonic acid salt in which benzenesulfonic acid having an alkyl group having 10 to 14 carbon atoms is neutralized with sodium, a fatty alcohol having 10 to 16 carbon atoms in which 3 mol of ethylene oxide is added, Alkyl ethoxy sulfates and alkyl ethoxy propoxy sulfates in which 1 mole of ethylene oxide 3 mol propylene oxide is added to the fatty alcohol having 10 to 16 carbon atoms and sodium is neutralized.

The (a) anionic surfactant may be contained in an amount of 1 to 20% by weight, preferably 5 to 15% by weight based on the total weight of the liquid detergent composition.

If the content of the anionic surfactant (a) is less than 1% by weight, the liquid detergent has insufficient preservative effect on the microorganism. If the content of the surfactant is more than 20% by weight, the stability of the phase may be deteriorated.

(b) an inorganic salt

In the present invention, the inorganic salt not only contributes to improvement of detergency against various pollution, but also has a preservative effect.

The inorganic salt (b) may be included in an amount of 5 to 20% by weight, and preferably 7 to 15% by weight based on the total weight of the liquid detergent composition.

If the content of the inorganic salt (b) is less than 5% by weight, the preservative effect is insignificant. If the content of the inorganic salt is more than 20% by weight, excessive use of the raw material and cost may be incurred.

The inorganic salt (b) may include at least one member selected from the group consisting of sodium chloride, potassium chloride, sodium carbonate, sodium bicarbonate, potassium carbonate and potassium bicarbonate.

(c) amino acid

In the present invention, the amino acid has low cytotoxicity as well as detergency of the liquid detergent composition of the present invention, and it has good skin affinity and can reduce skin irritation.

The amino acid (c) may be included in an amount of 0.1 to 5% by weight, preferably 0.5 to 2% by weight based on the total weight of the liquid detergent composition.

If the content of the amino acid (c) is less than 0.1% by weight, the preservative effect is insufficient. If the content exceeds 5% by weight, excessive use of the raw material and cost may be incurred.

The amino acid (c) may include at least one of amino acids having a carboxyl group and an amino group, and preferably at least one of glycine and glutamic acid.

In addition, the liquid detergent composition according to the present invention can be used in an appropriate amount, if necessary, in a range that does not impair the effects of the present invention, such as solubilizing agents, enzymes, chelating agents, fragrances, defoamers and pigments . As the solubilizing agent, propylene glycol may be preferably used, but is not limited thereto.

The amount of the additive may be 0.01 to 10% by weight, preferably 0.01 to 5% by weight based on the total weight of the composition. However, the amount of the additive may vary depending on the object, A person skilled in the art can arbitrarily control the content thereof insofar as the human body, environment and storage stability are not impaired.

The liquid detergent composition of the present invention includes water as the other component in addition to the above components. The ingredients are mixed with water to form a liquid detergent composition.

Hereinafter, the present invention will be described in more detail by way of examples and comparative examples, but the technical scope of the present invention is not limited thereto. Unless otherwise stated in the following table, units are percent by weight.

Liquid detergent compositions were prepared using conventional methods known in the art, following the ingredients set forth in Tables 1 and 2 below.

ingredient Example One 2 3 4 5 6 7 8 Surfactants anionic (1) 5 5 5 5 5 5 One 10 Surfactants anionic (2) 7 7 7 7 7 0 One 10 Surfactants anionic (3) - - - - - 7 - - Sodium chloride 5 20 10 10 10 10 10 10 Glycine One One 0.1 5 One One One One Additives (4) 5 5 5 5 5 5 5 5 water Balance Balance Balance Balance Balance Balance Balance Balance Sum 100 100 100 100 100 100 100 100

(1) A straight chain alkylbenzenesulfonic acid salt (LAS: product name: ASCO 96, ACK Chemtech) obtained by neutralizing benzenesulfonic acid having an alkyl group having 10 to 14 carbon atoms with sodium,

(2) alkylethoxysulphate (AES; product name: ASCO 24-3 / 70 ACK Chemtech) in which 3 mol of ethylene oxide was added to a fatty alcohol having 10 to 16 carbon atoms and neutralized with sodium;

(3) an alkyl ethoxypropoxysulfate having 3 mol of ethylene oxide and 1 mol of propylene oxide added to a fatty alcohol having 10 to 16 carbon atoms and neutralized with sodium

(4) Propylene glycol, sodium citrate, defoamer, enzyme, flavor and preservative were used as additives.

ingredient Comparative Example One 2 3 4 5 6 7 8 Surfactants anionic (1) 5 5 5 5 5 5 5 5 Surfactants anionic (2) 7 7 7 7 7 7 7 7 Sodium chloride One 25 10 10 One One 25 25 Glycine One One 0 7 0 7 0 7 Additives (4) 5 5 5 5 5 5 5 5 water Balance Balance Balance Balance Balance Balance Balance Balance Sum 100 100 100 100 100 100 100 100

Experimental Example  One: Buoyancy  evaluation

100 g of the liquid detergent composition prepared according to the examples of Table 1 and the comparative examples of Table 2 were weighed in a 200 ml container and prepared as microorganism types. After the microorganisms were introduced as shown in Table 3, samples were taken at regular intervals for 7 days After the sample was sampled, it was applied to the medium and cultured, and the flotation force was evaluated by the method shown in Table 4 below. The results are shown in Tables 5 and 6 below.

division Germ leaven Basophil Inoculation number 1 x 10 ⁶ / g 1 x 10 ⁵ / g 1 x 10 ⁶ / g Inoculum Burkholderia Sepassia
(Burkholderiacepacia) Candida paraproxilosis
(Candida parapsilosis) Halomonas
(Halomonas) Escherichia coli
(Escherichia coli) Candida albicans
(Candida albicans) - P. aeruginosa
(Pseudomonas aeruginosa) - - Staphylococcus aureus
(Staphylococcus aureus) - - Seatrovarter Brackley
(Citrobacterbraakii) - - Incubation temperature Store at 37 ℃ Storage at 25 ℃ Storage at 30 ℃ Incubation time 24 hours 48 hours 72 hours or more

Buoyancy ○: Excellent (death within 7 days) X: Bad (does not die within 7 days)

ingredient Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8
Buoyancy Germ ○ ○ ○ ○ ○ ○ ○ ○ leaven ○ ○ ○ ○ ○ ○ ○ ○ Basophil ○ ○ ○ ○ ○ ○ ○ ○

ingredient Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8
Buoyancy Germ X ○ ○ ○ X ○ ○ ○ leaven X ○ ○ ○ X X ○ ○ Basophil ○ ○ X ○ X ○ X ○

As can be seen from Table 5, the liquid detergent compositions of the examples of the present invention exhibit excellent repellency against bacteria, yeast, and basophils, but the inorganic salt (sodium chloride) is less than 5% by weight in Table 6, (Glycine) is less than 0.1% by weight, it can be understood that the repellency is poor.

Experimental Example  2: Phase stability evaluation

The stability of the liquid detergent compositions prepared according to the above Examples and Comparative Examples was evaluated according to the following Table 7, and the results are shown in Tables 8 and 9 below.

Phase stability Good: Excellent (no phase separation and precipitation phenomenon) ?: Normal (fine phase separation and precipitation phenomenon occurred) X: Volume (phase separation and precipitation occurrence)

ingredient Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Phase stability ○ ○ ○ ○ ○ ○ ○ ○

ingredient Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Phase stability ○ X ○ △ ○ △ X X

As can be seen from Table 8, all of the liquid detergent compositions of the examples of the present invention exhibit excellent phase stability. However, in Table 9, the inorganic salt (sodium chloride) exceeds 20% by weight or the amino acid (glycine) It can be seen that the phase stability is poor.

Claims (5)

(a) a linear alkyl benzene sulfonic acid salt (LAS) having 10 to 14 carbon atoms; Or an anionic surfactant represented by the following formula (1); At least one of them;
(b) 5 to 20% by weight of sodium chloride; And
(c) 0.1 to 3% by weight of an amino acid; Lt; RTI ID = 0.0 > 1, < / RTI >

≪ Formula 1 >
R ₁ -OXY-SO ₃ -Z
Wherein R ₁ is C ₈ to C ₁₆ straight chain alkyl or alkenyl, branched chain alkyl or alkenyl,
Wherein X is (C ₂ H ₄ O) _n wherein n is an integer from 1 to 15 and Y is (C ₃ H ₆ O) _m , wherein m is an integer from 0 to 5, Z is an alkali metal, Earth metal ion, a C ₁ to C ₃ alkanolamine, and a salt having a cationic polarity of an alkylalkanolamine)
delete The method according to claim 1,
Wherein the amino acid (c) comprises at least one selected from glycine and glutamic acid.
The method according to claim 1,
Wherein the liquid detergent composition further comprises at least one additive selected from a solubilizing agent, an enzyme, a chelating agent, a flavoring agent, an antifoaming agent and a colorant.
5. The method of claim 4,
Wherein the content of the additive is in the range of 0.01 to 10% by weight based on the total weight of the liquid detergent composition.