WO2021112271A1 - Laundry detergent composition, for preventing demineralization and color bleed, having improved activity for removing contaminants fixed into fiber - Google Patents

Abstract

The present invention relates to a laundry detergent composition, for preventing demineralization and color bleed, having improved activity for removing contaminants fixed into the fiber. Using the laundry detergent composition of the present invention allows contaminants fixed into the fiber, especially the contaminants that can easily get fixed in the lower-body undergarments of females due to bodily secretions, menstrual blood, and the like, can be completely removed without any residual contaminants.

Description

Laundry detergent composition for desalting and preventing color transfer with improved ability to remove contaminants adhering to the fibers

The present invention relates to a laundry detergent composition for preventing demineralization and color transfer with improved ability to remove contaminants adhering to a fiber bundle.

Contaminants adhering to the fibers, for example, various secretions secreted from the human body, more specifically, for example, sweat, blood, stool/urine, vaginal secretions, menstrual blood, etc. In this case, it is not easy to cleanly remove it by a general washing method using a general laundry detergent.

In addition, when washing is performed to remove fixed contamination using existing detergents with increased washing and bleaching power, even the color of the fabric itself is discolored/discolored, and in the end, in the case of colored fabrics, stains tainted by this washing method There is a problem that cannot be removed.

Although detergents for preventing desalination, which help to maintain the original color of conventional fibers, have been published, most of them are neutral detergent-based detergents and have relatively weak cleaning power.

There is a need for a new laundry detergent composition that has excellent anti-salting properties for fabrics, while improving cleaning power against stubborn stains, so that there is little change in color of fabrics.

The present inventors have intensively researched and tried to develop a laundry detergent composition capable of removing stains adhering to fibers, for example underwear, in particular, bottoms, without remaining stains. As a result, when a composition containing a protease and a nonionic surfactant and the content of the pH adjusting agent is adjusted to have weak alkalinity is used, the present invention has been completed by identifying that contamination adhering to the fiber can be effectively removed. .

Accordingly, an object of the present invention is to provide a laundry detergent composition with excellently improved ability to remove stains fixed in fibers.

Another object of the present invention is to provide a laundry detergent composition for washing women's underwear.

According to an aspect of the present invention, based on 100 parts by weight of the total composition, 6-14 parts by weight of protease, 10-20 parts by weight of laureth-7, 0.1 to 1 parts by weight of cocamide DA, 0.1 to 0.7 parts by weight A laundry detergent composition comprising parts of sodium hydroxide, 0.1 to 0.3 parts by weight of boric acid, 0.5 to 0.9 parts by weight of hydroxymethylcellulose, 0.1 to 0.3 parts by weight of disodium EDTA, and 0.3 to 0.7 parts by weight of sodium benzoate to provide.

The present inventors have intensively researched and tried to develop a laundry detergent composition capable of removing stains adhering to fibers, for example underwear, in particular, bottoms, without remaining stains. As a result, it was found that when a composition containing a protease and a nonionic surfactant and the content of the pH adjusting agent is adjusted to have weak alkalinity is used, it is possible to effectively remove the contamination adhering to the fiber.

The composition of the present invention comprises a protease. As described above, the protease of the present invention is included in an amount of 6-14 parts by weight based on 100 parts by weight of the total composition, in addition to 6-12 parts by weight, 6-10 parts by weight, 7-10 parts by weight, 8-10 parts by weight. can

According to one embodiment of the present invention, the laundry detergent composition of the present invention is characterized in that it is slightly alkaline, specifically, for example, the pH is 7.5 to 9.5. More specifically, the pH of the laundry detergent composition of the present invention may be 8.0 to 9.0. The pH of the laundry detergent composition of the present invention can be controlled by appropriately adjusting the content of sodium hydroxide and boric acid included as a pH adjuster.

In one embodiment of the present invention, the composition of the present invention comprises protease 8.0% by weight, laureth-7 15.0% by weight, cocamide DA 0.5% by weight, sodium hydroxide 0.4% by weight, boric acid 0.2% by weight, hydride 0.7% by weight of oxymethylcellulose, 0.2% by weight of disodium EDIT, 0.5% by weight of sodium benzoate, and the remaining amount of purified water. The laundry detergent composition of the present invention may optionally further include a fragrance according to consumer preference, for example, it may optionally include a fragrance of 0.01% to 0.1% by weight.

According to another aspect of the present invention, there is provided a laundry detergent composition for washing women's underwear comprising the above-described laundry detergent composition. The laundry detergent composition of the present invention is an excellent detergent for washing contaminants adhering to fibers, and in particular, it can be usefully used for washing underwear for women, in which contaminants are easily fixed by vaginal secretions, menstrual blood, and the like.

The laundry detergent composition for laundry for women's underwear of the present invention corresponds to an example in which the use of the comprehensive laundry detergent composition described as another aspect of the present invention described above is more specifically limited. is omitted to avoid excessive complexity.

The features and advantages of the present invention are summarized as follows:

(a) The present invention provides a laundry detergent composition with excellently improved ability to remove stains adhering to fibers.

(b) The present invention provides a laundry detergent composition for washing women's underwear.

(c) In the case of using the laundry detergent composition of the present invention, it is possible to cleanly remove the contamination fixed in the fibers, especially the contamination that is easily adhered to the bottom of women's underwear, by body fluid secretions, menstrual blood, etc., without remaining contamination.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for illustrating the present invention in more detail, and it will be apparent to those skilled in the art that the scope of the present invention is not limited by these examples according to the gist of the present invention. .

Example

Experimental Example 1: Preparation of samples

In order to evaluate the efficacy according to the protease content of the laundry detergent of the present invention including protease, laureth-7 and cocamide DA, liquid laundry detergents were prepared with the compositions of Tables 1 to 3 below, and the washing power in two ways The test was performed.

ingredient sample 1 sample 2 sample 3 sample 4 sample 5 Sample 6 (Example 1) Sample 7 (Example 2) Sample 8 (Example 3) protease 0.0% 0.5% 1.0% 3.0% 5.0% 8.0% 10.0% 15.0% Alkylbenzenesulfonic acid 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% Sodium Laureth Sulfate 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% Sodium C14-16 Alpha Olefin Sulfonate 3.0% 3.0% 3.0% 3.0% 3.0% 3.0% 3.0% 3.0% Laureth-7 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% Cocamide D.A. 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% sodium hydroxide 0.60% 0.60% 0.60% 0.60% 0.60% 0.60% 0.60% 0.60% Boric Acid 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Hydroxymethylcellulose 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% Disodium EDIT 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Sodium Benzoate 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% Spices 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% Purified water Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%)

ingredient sample 9 sample 10 sample 11 sample 12 sample 13 Sample 14 (Example 3) Sample 15 (Example 4) Sample 16 (Example 5) protease 0.0% 0.5% 1.0% 3.0% 5.0% 8.0% 10.0% 15.0% Alkylbenzenesulfonic acid 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% Sodium Laureth Sulfate 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% 1.0% Sodium C14-16 Alpha Olefin Sulfonate 3.0% 3.0% 3.0% 3.0% 3.0% 3.0% 3.0% 3.0% Laureth-7 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% 5.0% Cocamide D.A. 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% sodium hydroxide 0.45% 0.45% 0.45% 0.45% 0.45% 0.45% 0.45% 0.45% Boric Acid 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Hydroxymethylcellulose 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% Disodium EDIT 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Sodium Benzoate 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% Spices 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% Purified water Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%)

ingredient sample 17 sample 18 sample 19 Sample 20 (Example 6) Sample 21 (Example 7) Sample 22 (Example 8) Sample 23 (Example 9) protease 8.0% 8.0% 8.0% 8.0% 8.0% 8.0% 8.0% Alkylbenzenesulfonic acid 5.0% 10.0% 15.0% - - - - Sodium Laureth Sulfate 1.0% 2.0% 3.0% - - - - Sodium C14-16 Alpha Olefin Sulfonate 3.0% 6.0% 9.0% - - - - Laureth-7 5.0% - - 10.0% 15.0% 20.0% 25.0% Cocamide D.A. 0.50% - - 0.50% 0.50% 0.50% 0.50% sodium hydroxide 0.60% 1.20% 1.80% 0.40% 0.40% 0.40% 0.40% Boric Acid 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Hydroxymethylcellulose 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% 0.70% Disodium EDIT 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% 0.20% Sodium Benzoate 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% 0.50% Spices 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% 0.05% Purified water Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%)

ingredient sample 24 sample 25 sample 26 sample 27 protease 8.0% 8.0% 8.0% 8.0% Alkylbenzenesulfonic acid 5.0% 5.0% - - Sodium Laureth Sulfate 1.0% 1.0% - - Sodium C14-16 Alpha Olefin Sulfonate 3.0% 3.0% - - Laureth-7 5.0% - 10.0% 15.0% Cocamide D.A. 0.50% - 0.50% 0.50% Lauramidopropyl Betaine 5.0% 5.0% 5.0% 10.0% sodium hydroxide 0.60% 0.60% 0.40% 0.40% Boric Acid 0.20% 0.20% 0.20% 0.20% Hydroxymethylcellulose 0.70% 0.70% 0.70% 0.70% Disodium EDIT 0.20% 0.20% 0.20% 0.20% Sodium Benzoate 0.50% 0.50% 0.50% 0.50% Spices 0.05% 0.05% 0.05% 0.05% Purified water Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%) Remaining amount (to 100%)

The units of the values shown in Tables 1 to 3 represent the weight % of each component with respect to the total composition. As a protease, a Savinase ^® 16T product from Novozyme was used, and added as an enzyme degrading the proteolytic component of the fixed contamination. Alkylbenzene sulfonic acid (AK Chemtech ASCO96), sodium laureth sulfate (AK Chemtech ASCO 24-2/26), and sodium C14-16 alpha olefin sulfonate (AK Chemtech ASCO 1416) are added as anionic surfactants Laureth-7 (Dongnam Synthetic, LA-7) and Cocamide DA (Miwon Corporation, CDE) were added as nonionic surfactants. Sodium hydroxide and boric acid were added as a pH adjuster, hydroxymethylcellulose was added as a thickener, and disodium EDTA (Shijiazhuang Jackchem EDTA-2Na) was a sequestering agent, sodium benzoate (Sciencelab Co.) was added as a preservative. Lauramidopropyl betaine (AK Chemtech, ASCO LBP) of Samples 24-27 was used as an amphoteric surfactant.

Example 2: Evaluation of Washing Effect on Wet Artificial Contamination Fabric AS-10

The cleaning power of each sample was evaluated using the wet artificial stain cloth AS-10. In the case of the test using AS-10, the washing treatment conditions were in accordance with the Korean standard KS M 2709 test method, and each sample was tested at an amount of 2 mL/L. After measuring the reflectance of the stained fabric before and after the washing treatment, the washing power was evaluated using the following formula.

(1) Whiteness =

(2) Washing power (%) = {(Whiteness after washing - Whiteness before washing) / (Whiteness of original fabric - Whiteness before washing)} * 100

The results are shown in Tables 5 to 8 below.

division sample 1 sample 2 sample 3 sample 4 sample 5 sample 6 sample 7 sample 8 Cleaning power (%) (for AS-10) 30.4 35.2 42.8 48.4 53.2 60.5 59.4 59.5

division sample 9 sample 10 sample 11 sample 12 sample 13 sample 14 sample 15 sample 16 Cleaning power (%) (for AS-10) 24.2 28.7 35.7 38.1 43.2 51.9 51.3 50.4

division sample 17 sample 18 sample 19 sample 20 sample 21 sample 22 sample 23 Cleaning power (%) (for AS-10) 60.5 54.9 52.3 67.2 69.2 70.6 70.4

division sample 24 sample 25 sample 26 sample 27 Cleaning power (%) (for AS-10) 55.2 49.6 59.8 61.2

Samples 1 to 8 and samples 9 to 16 correspond to a test set for determining a more suitable pH environment by varying the content of the pH adjusting agent. Samples 1 to 8 correspond to a pH of 8.5, and samples 9 to 16 correspond to a pH of 7.0. As shown in Tables 4 and 5, when the pH was 8.5 compared to the case of 7.0, it was observed that the cleaning power was increased by about 1.2 times. On the other hand, it was found that the detergency value converges close to the maximum value when the protease content is approximately 8% by weight or more. Meanwhile, in order to test the change in cleaning power according to the type of surfactant, samples 17 to 23 were prepared and the cleaning power when a nonionic surfactant was added instead of an anionic surfactant was evaluated. In conclusion, when only a nonionic surfactant, not an anionic surfactant, is used, a significant increase in cleaning power is observed. In addition, samples 24-27 were prepared by further adding an amphoteric surfactant, and detergency was evaluated. When the amphoteric surfactant was added, a phenomenon in which the cleaning power against the adhered contamination was rather decreased compared to the case where only the nonionic surfactant was included.

Example 3: Evaluation of Laundry Effect on Fabrics Contaminated by Body Fluids

Cotton underwear, which was contaminated with menstrual blood and had body fluid components fixed after 24 hours or more, was prepared. Washing treatment conditions were in accordance with the Korean standard KS M 2709 test method, and each sample was tested at an amount of 2 mL/L. After measuring the reflectance of the stained fabric before and after the washing treatment, the washing power was evaluated using the following formula.

(1) Whiteness =

(2) Washing power (%) = {(Whiteness after washing - Whiteness before washing) / (Whiteness of original fabric - Whiteness before washing)} * 100

The results are shown in Tables 9 to 12 below.

division sample 1 sample 2 sample 3 sample 4 sample 5 sample 6 sample 7 sample 8 Cleaning power (%) (for body fluid contaminated cloth) 28.5 32.4 37.4 44.9 50.8 58.5 59.8 60.2

division sample 9 sample 10 sample 11 sample 12 sample 13 sample 14 sample 15 sample 16 Cleaning power (%) (for body fluid contaminated cloth) 22.2 27.3 32.1 37.8 42.6 50.0 51.7 52.4

division sample 17 sample 18 sample 19 sample 20 sample 21 sample 22 sample 23 Cleaning power (%) (for body fluid contaminated cloth) 58.5 52.9 54.3 62.2 69.2 70.6 70.4

division sample 24 sample 25 sample 26 sample 27 Cleaning power (%) (for body fluid contaminated cloth) 52.2 47.6 58.0 60.8

As described above, samples 1 to 8 and samples 9 to 16 correspond to a test set for determining a more suitable pH environment by varying the content of the pH adjusting agent. Samples 1 to 8 correspond to a pH of 8.5, and samples 9 to 16 correspond to a pH of 7.0. As seen in Tables 7 and 8, when the pH is 8.5 compared to the case of 7.0, it can be observed that the cleaning power is increased by about 1.2 times, which is consistent with the results of the experiment using the AS-10 contaminated cloth. When the protease content is about 8% by weight or more, it was also found that the detergency value converges close to the maximum value, similar to the previous experimental results. In the test of the change in cleaning power according to the type of surfactant using Samples 17 to 23 and Samples 24 to 27, when only a nonionic surfactant was used, not an anionic surfactant or an amphoteric surfactant, a significant increase in the cleaning power was observed. Observed results were derived.

Example 4: Evaluation of the efficacy of detergents for preventing desalting and color transfer

With reference to Korean Patent Registration No. 10-1989597, the desalting and color transfer efficacy was measured. I prepared the same size jeans of the same brand commercially available and a white cotton T-shirt of the same brand sold in the market, and put one pair of jeans and one white cotton T-shirt for each trial set together in a general household washing machine (manufactured by LG). , samples 6, 14, and 20 were tested. As a control sample, the composition of Example 2 showing the best efficacy among the examples of Korean Patent Registration No. 10-1989597 (PVP 0.6 wt%, disodium laureth sulfosuccinate 5.0 wt%, sodium cocoyl apple amino acid 5.0 % by weight, potassium cocoyl glutamate 1.0% by weight, lauramidopropyl betaine 5.0% by weight, citric acid 0.5% by weight, disodium EDTA 0.2% by weight, sodium benzoate 0.5% by weight, fragrance 0.02% by weight, the remainder purified water of samples were used. Each sample was put in 20 ml, washed with lukewarm water (about 40 degrees) for 50 minutes, and dehydrated for 10 minutes. After drying for 1 hour and 30 minutes using a household electric dryer (manufactured by LG), take a picture of a white cotton T-shirt that has been washed and dried using the ^{color reference (SpyderCHECKR ⓡ 24) for calibration in the same indoor lighting environment} was performed. The obtained image is calibrated, the L, a, and b values of the cotton T-shirt are measured, and the color difference (ΔE ^* _ab value) is obtained by substituting the L, a, and b values of the cotton T-shirt image before washing into the following formula 1 did. The average value was calculated by performing the same test three times per sample (P<0.05).

(Formula 1)

In Equation 1, L ^* ₂ is the surface reflectance of the cotton T-shirt after washing, L ^* ₁ is the surface reflectance of the cotton T-shirt before washing, a ^* ₂ is the redness/greenness of the cotton T-shirt after washing, and a ^* ₁ is the surface reflectance of the cotton T-shirt after washing. is the redness/greenness of the cotton T-shirt, b ^* ₂ is the yellowness/blueness of the ^{cotton T-shirt before washing, and b *} ₁ is the yellowness/blueness of the cotton T-shirt before washing.

The ^{larger the ΔE *} _ab value, the greater the occurrence of otitis. The results are shown in Table 2 below.

control sample sample 6 sample 14 sample 20 Color difference (ΔE ^* _ab ) 1.3 1.9 1.7 2.3

Usually, when the color difference value is 2 or less, it can be considered that the color difference is in a range difficult to recognize with the naked eye, a value of 2 to 3 is barely recognizable with the naked eye, and 3 to 8 is a range in which a difference can be recognized to some extent. The degree of presence, a value of 8 or more can be regarded as a degree that can be clearly recognized. It was confirmed that the laundry detergent compositions of the present invention prevent color transfer between clothes to the same extent as laundry detergents prepared for desalting and color transfer prevention purposes, despite the detergents having strong cleaning power with excellent removal of fixed stains.

Experimental Example 5: Desalting prevention efficacy evaluation

Using the compositions of Samples 6, 14, and 20 and three commercially available general laundry detergents, the degree of water draining during washing was tested on jeans of the same brand. A 15-person random panel was asked to visually evaluate the experimental results.

Each pair of jeans was washed three times, and after the first washing, the color of the wash water obtained in the dehydration process was visually evaluated and the color of the jeans after washing and drying three times was comparatively evaluated.

In the case of comparison of wash water, 1-5 points were given for the degree of color denaturation based on a control group that mixed and stirred only the same amount of detergent, and the higher the score, the more severe the desalination was evaluated. The average value of the scores given by the panelists is shown in Table 14.

Company A product B company product Company C product sample 6 sample 14 sample 20 Color difference (ΔE ^* _ab ) 2.86 3.87 2.33 1.13 1.13 1.2

In the case of jeans, 1-3 points were assigned to the degree of color denaturation by using the same clothes that were not washed as a control group. The higher the score, the more severe the desalination was evaluated. The average values of the scores given by the panelists are shown in Table 15.

Company A product B company product Company C product sample 6 sample 14 sample 20 score 1.4 1.8 1.6 1.2 1.13 1.2

Results similar to the washing water evaluation were obtained. In the case of the compositions of the present invention, a result was derived that showed a very good anti-salting effect.

As described above in detail a specific part of the present invention, for those of ordinary skill in the art, this specific description is only a preferred embodiment, and it is clear that the scope of the present invention is not limited thereto. Accordingly, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

Claims (5)

Based on 100 parts by weight of the total composition, 6-14 parts by weight of protease, 10-20 parts by weight of laureth-7, 0.1 to 1 parts by weight of cocamide DA, 0.1 to 0.7 parts by weight of sodium hydroxide, 0.1 to 0.3 parts by weight A laundry detergent composition comprising boric acid, 0.5 to 0.9 parts by weight of hydroxymethylcellulose, 0.1 to 0.3 parts by weight of disodium EDITA, and 0.3 to 0.7 parts by weight of sodium benzoate. The laundry detergent composition according to claim 1, wherein the protease is included in 8-10 parts by weight. The laundry detergent composition according to claim 1, wherein the laundry detergent composition has a pH of 7.5 to 9.5. Protease 8.0 wt%, Laureth-7 15.0 wt%, Cocamide DEA 0.5 wt%, Sodium Hydroxide 0.4 wt%, Boric Acid 0.2 wt%, Hydroxymethylcellulose 0.7 wt%, Disodium EDITA 0.2 wt% %, sodium benzoate 0.5 wt%, fragrance 0.5 wt%, laundry detergent composition comprising the remaining amount of purified water. A laundry detergent composition for washing women's underwear comprising the composition of any one of claims 1 to 4.