KR20110077725A - Liquid detergent composition for front-loading washers - Google Patents

Abstract

PURPOSE: A liquid detergent composition for front-loading washers is provided to ensure excellent washability as well as excellent cleanability and low temperature phase stability, and to secure the small bubble generation amount. CONSTITUTION: A liquid detergent composition for front-loading washers comprises: non-ionic surfactants including a first surfactant and a second surfactant, wherein the first surfactant has ethylene oxide average addition mole number(x) of 5-9 in chemical formula 1: R1-O-(EO)x-H, and the second surfactant has ethylene oxide average addition mole number(x) of 12-20 in chemical formula 1: R1-O-(EO)x-H; flowable paraffin oils; and fatty acid salts.

Description

Liquid detergent composition for front-loading washers

The present invention relates to a liquid detergent composition for a drum type washing machine. More particularly, the present invention relates to a liquid detergent composition having a high rinsing power for fast rinsing property and various contaminants in a drum type washing machine having less rinsing water as well as excellent phase stability at low temperature storage.

Recently, a drum type washing machine with convenient temperature control and less damage to fibers has been continuously developed and spread. Since the drum type washing machine uses a free-fall washing method, a large amount of bubbles are generated during washing, and thus the rinsing efficiency is lowered. In order to solve this problem, various detergent compositions characterized by low foaming have been studied and proposed. However, there is still little suggestion of a detergent composition having satisfactory rinsability in a drum type washing machine.

JP-A 1996-067896 discloses detergents that control foam in the washing process and foam up to the rinsing step by using certain amino alkyl-modified silicone oils together with inorganic silica or inorganic silica derivatives with specific specific surface areas. . However, the formulation of the detergent is in powder form and has a problem that phase separation occurs when the silicone oil and inorganic silica are applied to the liquid detergent.

In addition, in the case of liquid detergents, there are disadvantages in that the detergent composition becomes uneven due to phase separation of bubble control components during low temperature storage, or precipitation or insoluble component of insoluble components occurs. Receive.

An object of the present invention to solve the above problems is a liquid detergent composition for a drum type washing machine suitable for a drum type washing machine which has not only fast rinsing ability and high washing power for various contaminations but also excellent phase stability at low temperature storage and a large amount of bubbles and low rinsing number. To provide.

According to an aspect of the present invention,

Nonionic surfactant comprising a first surfactant having an ethylene oxide average added mole number (x) of 5 to 9 in formula 1 and a second surfactant having an ethylene oxide average added mole number (x) of 12 to 20 in formula 1 ;

Liquid paraffin oil; And

There is provided a liquid detergent composition for a drum type washing machine comprising a fatty acid salt:

<Formula 1>

R ₁ -O- (EO) xH

(In Chemical Formula 1,

R ₁ means a straight or branched chain alkyl group or alkenyl group having 10 to 15 carbon atoms,

EO means ethylene oxide.)

The first surfactant and the second surfactant may be included in a weight ratio of 1: 1 to 1: 3.

The first surfactant may be included in 5 to 30 parts by weight based on the composition.

The second surfactant may be included in 10 to 40 parts by weight based on the composition.

The liquid paraffin oil may be included in an amount of 0.1 to 5 parts by weight based on the composition.

The fatty acid salt may be an alkali metal or alkanol amine salt of a saturated or unsaturated fatty acid having 12 to 18 carbon atoms.

The fatty acid salt may be included in an amount of 0.5 to 5 parts by weight based on the composition.

The liquid detergent composition of the present invention is suitable for washing and rinsing of a drum type washing machine not only having excellent washing power but also having a small amount of bubbles and excellent rinsing ability.

The liquid detergent composition of the present invention is excellent in low temperature stability because there is no phase separation even when stored for a long time at low temperature, and there is no precipitation or suspended matter.

Liquid detergent composition of the present invention is a liquid detergent type is easy to measure, has the advantage that dust does not fly compared to the powder detergent, bar can be used directly applied to a specific area of high pollution, it is easy to use. In addition, the powder detergent also compensates for the disadvantages such as agglomeration that may occur during long-term storage.

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

The liquid detergent composition for a drum type washing machine of the present invention includes two kinds of nonionic surfactants to which different moles of ethylene oxide are added. By using two kinds of nonionic surfactants to which different molar numbers of ethylene oxide are added in a specific ratio, a detergent composition having excellent washing power as well as excellent rinsability and low temperature stability can be obtained. In addition, since the rinsing property is improved, a large amount of bubbles may be generated and may be usefully used in a drum type washing machine having a low rinsing number.

Specifically, the liquid detergent composition of the present invention comprises a first surfactant having an ethylene oxide average added mole number (x) of 5 to 9 in formula 1 and an ethylene oxide average added mole number (x) of 12 to 20 in formula 1 Nonionic surfactants, including two surfactants, include:

<Formula 1>

R ₁ -O- (EO) xH

In Formula 1, R ₁ means a straight or branched alkyl group or alkenyl group having 10 to 15 carbon atoms, EO means ethylene oxide. As the content of ethylene oxide increases, solubility increases to improve rinsing, but tends to deteriorate washing power and low temperature stability. Therefore, as described above, by using a combination of the first surfactant having an average added mole number of ethylene oxide of 5 to 9 and the second surfactant having an average added mole number of ethylene oxide of 12 to 20, excellent washing power and low temperature stability and rinsability Can improve.

Preferably, the first surfactant and the second surfactant may be included in a weight ratio of 1: 1 to 1: 3. When the first surfactant is included in a weight ratio of less than 1: 1, rinsing properties and washing power may not be sufficient, and when the second surfactant is included in a weight ratio of more than 1: 3, washing power and low temperature stability may be deteriorated. There is a risk of phase separation when stored at low temperatures.

The first surfactant may be included in 5 to 30 parts by weight based on the composition. When included in less than 5 parts by weight can be reduced the washing power for various contamination, if it exceeds 30 parts by weight there is a concern that the phase stability of the composition may be lowered, the rinsability is lowered and the commercial cost due to high cost burden There can be.

The second surfactant may be included in 10 to 40 parts by weight based on the composition. If it is included less than 10 parts by weight, the rinsing property may be lowered. If it exceeds 40 parts by weight, the phase stability is lowered, which may cause phase separation when stored for a long period of time.

The liquid detergent composition of the present invention comprises a liquid paraffin oil.

The liquid paraffin oil not only contributes to the improvement of washing power, but also reduces the amount of bubbles and serves as a rinsing aid to improve the rinsability by reducing the amount of nonionic surfactant remaining on the fabric at the end of washing. When used simultaneously with nonionic surfactants, it provides the effect of improving the rinseability of nonionic surfactants.

The liquid paraffin oil has a melting point of −40 to 5 ° C., a breaking point of 110 ° C. or more, and contains 12 to 40 carbon atoms.

The liquid paraffin oil may be included in an amount of 0.1 to 5 parts by weight based on the composition. When included in less than 0.1 part by weight rinsing performance improvement effect may be difficult to achieve the object of the present invention with the addition of liquid paraline oil, when contained in more than 5 parts by weight may reduce the washing power and stability of the composition There is concern.

The liquid detergent composition of the present invention comprises a fatty acid salt.

The fatty acid salt not only contributes to the improvement in washing power, but also reduces the amount of bubbles generated in the initial stage of washing so that the cleaning component does not remain in the garment, thereby improving rinsability in the drum type washing machine. In addition, since the amount of air bubbles is reduced as a whole from the initial stage to the last stage of washing in parallel with the liquid paraffin oil, it serves to further improve the rinsability of the nonionic surfactant.

The fatty acid salt may be an alkali metal salt or alkanol amine salt of a saturated or unsaturated fatty acid having 12 to 18 carbon atoms. That is, the fatty acid salt is a form in which saturated or unsaturated fatty acids having 12 to 18 carbon atoms are neutralized with an alkali metal or alkanol amine. Specifically, the alkali metals include sodium, potassium, and the like, and alkanol amines include monoethanolamine, diethanolamine, and triethanolamine. In order to improve the low temperature storage stability of the composition, it is preferable to use a form of sodium salt or alkanol amine salt.

The fatty acid salt may be included in an amount of 0.5 to 5 parts by weight, and preferably 0.5 to 3 parts by weight, based on the composition. If the amount is less than 0.5 parts by weight, the effect of increasing the rinsing property is insignificant, and when added in excess of 5 parts by weight, the stability of the composition may be lowered.

The liquid detergent composition of the present invention may further include an anionic surfactant. By further including an anionic surfactant, washing power can be improved.

The anionic surfactants can be used without limitation to those known in the art, preferably linear or branched alkylbenzene sulfonate, alkyl sulfate, alkenyl sulfate, alpha sulfone fatty acid ester salt, alpha olefin sulfonate, alkyl ether carboxylic acid Alkyl ether carboxylate, alkanesulfonate, sulfobacteric acid alkyl ester salt, acylamino alkanesulfonate, alkyl ester, alkenyl ester, alkyl ester salt and alkenyl ester salt alone or mixtures thereof It may include.

The anionic surfactant may be included in an amount of 0.1 to 20 parts by weight based on the composition. If it is included in less than 0.1 parts by weight low temperature stability improvement effect, if included in more than 20 parts by weight may be poor rinsing in a drum type washing machine.

In addition, the liquid detergent composition according to the present invention may be formulated with an appropriate amount of conventional additives such as solubilizers, enzymes, preservatives, chelating agents, fragrances, antifoaming agents, and dyes as necessary in a range that does not impair the effects of the present invention. Can be.

The additive may be included in an amount of 0.01 to 10 parts by weight, preferably 0.01 to 5 parts by weight, based on the composition. When included in less than 0.01 parts by weight it may be difficult to achieve the object of the present invention to add an additive, when included in more than 10 parts by weight may increase the effect is small compared to the addition amount may lower the phase stability.

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

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. This is for the purpose of illustrating the invention only, and thus the scope of the invention is not limited.

< Example  1 to 9> Preparation of Liquid Detergent Composition

To prepare a liquid detergent composition using a conventional manufacturing process according to the composition of Table 1.

ingredient Example 1 Example 2 Example 3 Example 4 Example 5 Example
6 Example
7 Example
8 Example 9 First Surfactant ^{1 )} 15 8 10 10 10 10 30 5 20 Second Surfactant ^{2 )} 15 22 20 20 20 20 30 10 40 Liquid paraffin oil One One 0.1 5 One One One One One Fatty acid salts ^{3 )} 3 3 3 3 0.5 5 5 5 5 Propylene glycol 5 5 5 5 5 5 5 5 5 Preservatives, pigments and
Mixture of spices 2 2 2 2 2 2 2 2 2 water to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100

1) First surfactant: in Formula 1, R ₁ is C ₁₂ 75%, C ₁₄ A polyoxyethylene alkyl ether having 25% mixed alkyl group, 9 mol of average added moles of EO alone, and 13.4 with HLB value.

2) Second Surfactant: R ₁ in Formula ₁ Is C ₁₂ 75%, C ₁₄ A polyoxyethylene alkyl ether having 25% mixed alkyl group, 15 mol of average added moles of EO alone, and HLB value of 15.4.

3) C14 saturated fatty acid salt neutralized with sodium

< Comparative example  1 to 11> Preparation of Liquid Detergent Composition

To prepare a liquid detergent composition in the same manner as in the above Example 2 composition.

ingredient
Comparative Example One 2 3 4 5 6 7 8 9 10 11 First Surfactant ^{1 )} 30 - 20 5 10 10 10 10 3 35 25 Second Surfactant ^{2 )} - 30 10 25 20 20 20 20 5 35 45 Liquid paraffin oil One One One One - 7 One One One One One Fatty acid salts ^{3 )} 3 3 3 3 3 3 - 7 3 3 3 Propylene glycol 5 5 5 5 5 5 5 5 5 5 5 Preservatives, pigments and
Mixture of spices 2 2 2 2 2 2 2 2 2 2 2 water to 100 to 100 to 100 to 100 to 100 to 100 to 100 to 100 to
100 to
100 to 100

1) First surfactant: in Formula 1, R ₁ is C ₁₂ 75%, C ₁₄ A polyoxyethylene alkyl ether having 25% mixed alkyl group, 9 mol of average added moles of EO alone, and 13.4 with HLB value.

2) Second Surfactant: R ₁ in Formula ₁ Is C ₁₂ 75%, C ₁₄ A polyoxyethylene alkyl ether having 25% mixed alkyl group, 15 mol of average added moles of EO alone, and HLB value of 15.4.

3) C14 saturated fatty acid salt neutralized with sodium

< Experimental Example  1> Rinseability  evaluation

Rinsing evaluation was performed using a front-load washing machine (LG Electronic). Washing temperature of the washing machine was adjusted to 40 ℃ and washed for 30 minutes, rinsing was carried out twice for 5 minutes each. Dewatering of the laundry was performed at 800 rpm for 5 minutes.

As the detergent, 50 ml each of the liquid detergent compositions of Examples 1 to 9 and Comparative Examples 1 to 11 were used, and 1.2 kg of cotton towels were used for rinsing measurement.

Rinsing was determined according to the evaluation criteria shown in Table 3 below based on the amount of bubbles generated in the rinsing step by marking the scale from 0 to 25 in the washing machine transparent window, the results are shown in Table 4 and Table 5.

Rinsing criteria ◎: Very good (bubble generation amount is less than indication scale 1) ○: Excellent (bubble generation amount indication scale 1-3) △: Normal (bubble generation amount indication scale 3-5) X: Poor (Bubble generation amount exceeds display scale 5)

Example
One Example
2 Example 3 Example
4 Example 5 Example
6 Example
7 Example
8 Example
9 Rinseability ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎

Comparative example
One Comparative example
2 Comparative Example 3 Comparative example
4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative example
8 Comparative example
9 Comparative example
10 Comparative Example 11 Rinseability X ◎ X ◎ X ○ △ ○ ○ X X

According to Tables 4 and 5, the liquid detergent compositions of Examples are excellent in rinsing properties, while the detergent compositions of Comparative Examples 1 and 3, which do not contain a second surfactant or are contained in a small proportion, It was poor. In addition, the compositions of Comparative Examples 5 and 7 which did not contain liquid paraffin oil or fatty acid salts also had poor rinsing properties. In addition, Comparative Examples 10 and 11, in which the content of the first surfactant is excessively relatively poor in rinsability.

< Experimental Example  2> cleaning power rating

Detergency evaluation was performed using a stirred mixed detergent tester (Tergotometer, United States Testing Co., Inc.), which is mainly used for laboratory use. The cleaning power was measured at a rotational RPM of 120 at a temperature of 25 ° C., and the sample volume was used for 1 ml of water in 1 L. The washing time was performed twice for 10 minutes and for 3 minutes for rinsing. The artificial contaminants used for the measurement were C12 (Center For Testmaterials BV) and 10D (wfk Testgewebe GmbH). Each contaminated cloth was a contaminated cloth made of cotton, oil, protein contamination and sebum contamination, which were cut to a size of 8 × 8 cm and used for six samples. For each contaminated cloth before and after washing, the cleaning effect was determined by measuring the whiteness with a colorimeter (Japan testing Co., INC.) And determining the cleaning power calculated according to the following equation according to the evaluation criteria shown in Table 6, and the result Are shown in Table 7 and Table 8.

% Cleaning power = {(C-B) / (A-B)} × 100

A: whiteness of white cloth

B: contaminant whiteness before cleaning

C: contaminant whiteness after washing

Cleaning power evaluation criteria
(C12; face) ◎ very good (more than 45% of washing power) ○: excellent (washing power 40-45%) (Triangle | delta): Normal (35-40% of washing power) ×: defective (less than 35%)
Cleaning power evaluation criteria
(10D; face) ◎ very good (more than 45% of washing power) ○: excellent (washing power 40-45%) (Triangle | delta): Normal (35-40% of washing power) ×: defective (less than 35%)

Example
One Example
2 Example 3 Example
4 Example 5 Example
6 Example
7 Example
8 Example 9 C12; if ◎ ◎ ◎ ◎ ◎ ◎ ◎ ○ ◎ 10D; if ◎ ○ ◎ ◎ ◎ ◎ ◎ ○ ◎

Comparative example
One Comparative example
2 Comparative Example 3 Comparative example
4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative example
8 Comparative example
9 Comparative example
10 Comparative Example 11 C12; if ○ △ ○ △ ○ × △ × × ◎ ◎ 10D; if ○ △ ○ △ ○ × △ × × ◎ ◎

As shown in Table 7 and Table 8, the compositions of the examples are all excellent in washing power, but the detergent compositions of Comparative Examples 2 and 4, which do not contain the first surfactant or contained in a small proportion, the excellent cleaning power No, the liquid detergent compositions of Comparative Examples 6 and 8 that did not contain liquid paraffin oil or fatty acid salts had poor cleaning power.

< Experimental Example  3> Low temperature phase stability evaluation

In the low temperature phase stability evaluation, the detergent compositions of the above Examples and Comparative Examples were stored at −5 ° C. for 10 days to determine the low temperature phase stability according to the criteria shown in Table 9 below, and the results are shown in Table 10.

Low temperature phase stability ◎: Very good (no phase separation phenomenon, excellent fluidity) ○: Excellent (fine suspension occurs, fluidity is normal) △: moderate (severe suspension, low fluidity) X: Poor (phase separation, no fluidity)

Example
One Example
2 Example
3 Example
4 Example
5 Example
6 Example
7 Example
8 Example
9 Low temperature
Phase stability ◎ ◎ ◎ ◎ ◎ ◎ ○ ◎ ○

Comparative example
One Comparative example
2 Comparative Example 3 Comparative example
4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative example
8 Comparative example
9 Comparative example
10 Comparative example
11 Low temperature
Phase stability △ × ○ △ △ ○ △ × ○ × ×

According to Table 10 and Table 11, the liquid detergent composition of the Example was excellent in phase separation and fluidity even after long-term storage at low temperature, the phase stability was very good. On the other hand, the liquid detergent compositions of Comparative Examples 2 and 4, which do not contain the first surfactant or have a relatively low content, had poor phase stability due to phase separation, and the composition of Comparative Example 8 containing excessive fatty acid salt was also included. Phase stability was inferior.

As described above, the liquid detergent composition of the present invention not only has excellent washing power and low temperature phase stability against various contaminants, but also has excellent rinsing property. Therefore, it can be seen that it is suitable for washing a drum type washing machine with a lot of bubbles and a small number of rinses.

Claims (7)

Nonionic surfactant comprising a first surfactant having an ethylene oxide average added mole number (x) of 5 to 9 in formula 1 and a second surfactant having an ethylene oxide average added mole number (x) of 12 to 20 in formula 1 ; Liquid paraffin oil; And Liquid detergent composition for a drum type washing machine comprising a fatty acid salt: <Formula 1> R ₁ -O- (EO) xH (In Chemical Formula 1, R ₁ means a straight or branched chain alkyl group or alkenyl group having 10 to 15 carbon atoms, EO means ethylene oxide.) The method according to claim 1, The liquid detergent composition for a drum type washing machine, wherein the first surfactant and the second surfactant are included in a weight ratio of 1: 1 to 1: 3. The method according to claim 1, Liquid detergent composition for a drum type washing machine, characterized in that the first surfactant is contained in 5 to 30 parts by weight based on the composition. The method according to claim 1, Liquid detergent composition for a drum type washing machine, characterized in that the second surfactant is contained in 10 to 40 parts by weight based on the composition. The method according to claim 1, The liquid detergent composition for a drum type washing machine, wherein the liquid paraffin oil is included in an amount of 0.1 to 5 parts by weight based on the composition. The method according to claim 1, The liquid detergent composition for a drum type washing machine, wherein the fatty acid salt is an alkali metal or alkanol amine salt of a saturated or unsaturated fatty acid having 12 to 18 carbon atoms. The method according to claim 1, Liquid detergent composition for a drum type washing machine, characterized in that the fatty acid salt is contained in 0.5 to 5 parts by weight based on the composition.