KR20020091846A - Detergent composition for automatic dish-washing comprising non-ionic surfactant - Google Patents

Abstract

PURPOSE: A cleanser composition for a dish washer is provided, to improve the cleansing power and the washing power and to reduce the generation of bubbles by employing two types of nonionic surfactants having a high EO degree and a low EO degree, respectively. CONSTITUTION: The cleanser composition comprises 1.0-5.0 wt% of polyoxyethylene alkyl ether having an EO degree of 40-60 and 1.0-5.0 wt% of polyoxyethylene alkyl ether having an EO degree of 3-11 as a nonionic surfactant. Preferably the polyoxyethylene alkyl ethers have a formula of R1-O-(CH2-CH2O)m-H and R2-O-(CH2-CH2O)n-H, wherein R1 is a chain of C10-C14; R2 is a chain of C14-C18; m is an integer of 40-60; and n is an integer of 3-11. The mixing ratio of the polyoxyethylene alkyl ether having an EO degree of 40-60 to the polyoxyethylene alkyl ether having an EO degree of 3-11 is 1:5 to 5:1. The cleanser composition has the pH of 10-12 and is in the form of powder.

Description

Detergent composition for automatic dish-washing comprising non-ionic surfactant

The present invention relates to a detergent composition for a dishwasher, and more particularly, by using a nonionic surfactant polymerized with ethylene oxide (EO) as a linear alkyl group as a main cleaning component, as well as excellent washing ability and proper foaming and detergency. It relates to a detergent composition for dishwasher having.

In general, a surfactant is used as a cleaning ingredient in kitchen detergents, which are largely divided into anionic surfactants, nonionic surfactants, and amphoteric surfactants. In particular, in the field of dishwashing detergent, anionic surfactants cannot be used despite the high cleaning power due to the foaming problem, which hinders the water spraying action of the nozzle in the dishwasher. , Fatty acid alkyl amide, or the like, or as an amphoteric surfactant, alkyl amine oxide, alkyl betaine, etc. may be used.

As an example of using a nonionic surfactant, tallow alcohol (9EO) was used in USP4,162,987, and polymerized with nonyl phenyl (5EO), ethylene oxide (PO), and propylene oxide (PO) in USP3,549,539. One copolymer was used. However, in the case of USP4,162,987, since a lot of bubbles are prescribed, a bubble inhibitor must be added separately, and USP3,549,539 may have an adverse effect on the environment because of a phenyl group.

Conventionally, in order to increase the dishwashing power, the amount of the surfactant is increased or an excellent foam is used. However, in dishwashing detergents, the amount of foam and the cleaning power are not necessarily proportional. If the amount of foam is increased more than a certain amount, there is a problem that the spraying force of the water from the nozzle in the dishwasher to reduce the cleaning power, adversely affect the cleaning power, and if the contaminated water overflows out of the dishwasher.

Therefore, the present inventors use polyoxyethylene alkyl ether, a nonionic surfactant having excellent cleaning power against oil contamination and low raw material price, but has a high hydrophilic-lipophilic balance (HLB) value, high molar number of EO (ethylene oxide), and foam. A detergent that prevents simple foaming increase and has strong cleaning power by using an excellent hydrophilic nonionic surfactant and an lipophilic nonionic surfactant having a small HLB value and a low number of EO added moles at an appropriate mixing ratio. To complete.

In addition, the introduction of the lipophilic non-ionic surfactant in the present invention can remove the traces, stains, etc. caused by not using the enzyme for removing oil, such as lipase in the prescription, resulting in a result of improving the cleaning power .

Accordingly, an object of the present invention is to solve the technical problem of controlling the use of a surfactant directly related to the cleaning power and thus foaming, and it is possible to prevent simple foaming and have an optimal foam as well as exhibit strong cleaning power. It is to provide a detergent composition for automatic washing machine.

In order to achieve the object of the present invention, the present invention is 1.0 to 5.0% by weight of polyoxyethylene alkyl ether (EO = 40 ~ 60) and polyoxyethylene alkyl ether (EO = 3 ~ 11) which is a nonionic surfactant, respectively It provides a detergent composition for a dishwasher, characterized in that the pH is slightly alkaline (10 ~ 12).

In the present invention, in selecting a surfactant for the cleaning power, there is no environmental problem and only the high alcohol-based nonionic surfactant having sufficient cleaning power is selected to have an image as an advanced detergent. As the nonionic surfactant, two alkyl ether nonionic surfactants to which different numbers of ethylene oxide (EO) were added were used in combination at an appropriate mixing ratio.

Polyoxyethylene alkyl ether (EO = 40 ~ 60), which is a nonionic surfactant, has a strong EO polymerization ability, solubility in water, and excellent foaming ability, so it has strong washing power. The cleaning activity may be disturbed, and polyoxyethylene alkyl ether (EO = 3 ~ 11), which is a nonionic surfactant, has a low degree of EO polymerization, which reduces the solubility in water but slows the increase of bubbles, thereby compensating for the phenomenon of overflowing bubbles. In addition, it has an excellent cleaning power for oil pollution, which is easy to remove stains and traces on tableware.

In the present invention, by mixing the two non-ionic surfactants of different strengths and weaknesses in an appropriate mixing ratio, it provides a new method that enhances the cleaning power, prevents past products, and eliminates the drawbacks of stains and traces on the tableware.

In this invention, it is preferable that the mixing ratio of polyoxyethylene alkyl ether (EO = 40-60) and polyoxyethylene alkyl ether (EO = 3-11) which is a nonionic surfactant is 1: 5-5: 1. . If the mixing ratio is less than 1: 5, the washing power is weakened. If the mixing ratio is greater than 5: 1, the past products prevent the operation of the dishwasher and reduce the ability to remove stains and traces.

Detergent composition of the present invention as a main cleaning component, in addition to the non-ionic surfactant, builders functioning as a filler, bleaching ingredients to remove stains, enzymes to increase the cleaning power, stability to improve product flow and stability The agent may further include a preservative, a coloring agent, and the like.

The detergent composition for dishwasher of the present invention may be in powder or liquid form, but preferably in powder form.

Hereinafter, the detergent composition of the present invention will be described in detail by dividing each component.

[Surfactants]

Nonionic surfactants used in the present invention are of the general formula R ₁ -O- (CH ₂ -CH ₂ O) mH and R ₂ -O- (CH ₂ -CH ₂ O) nH, wherein R ₁ is C10 ~ C14 R ₂ has a chain between C14 and C18, m is a mole between 40 and 60, and n is between 3-11. The use amount contains 1.0 to 5.0 weight%, respectively. If it is used below this range, decontamination is not enough due to the deterioration of cleaning power, and if it exceeds the range, the particles become larger than the optimum amount of surface adsorption with the powder raw material, resulting in a decrease in fluidity.

[Builders]

The composition of the present invention may contain about 50 to 90% by weight of the builder. Mineral builders that may be used include sodium carbonate, potassium carbonate, sodium silicate, sodium sulfate, layered silicates, aluminosilicates and the like. In addition, TAED (Tetra acetyl ethylene diamine), DADHT (1,5-diacetyl-2,4-dioxo-hexahydro-1,3,5-triazine), sodium citrate (sodium citrate) may be used as the organic builder.

[bleach]

The present invention may include a peroxide that generates hydrogen peroxide as an oxygen-based bleach to enhance cleaning power and remove rust. Conventionally, a chlorine bleach is used, but an oxygen bleach is preferably used in consideration of chemical stability (USP5,292,446). If the amount used is less than 4% at about 4-10% by weight, it is difficult to obtain sufficient effect. If it is used more than 10%, the cost rises compared to the effective price. Examples of the type used include perborate and percarbonate. Perborates include sodium perborate monohydrate (PBS1) and sodium perborate tetrahydrate (PBS4), and PBS1 has a very stable and fast dissolving ability, but has to be stored in silo.PBS4 is less than PBS1 in terms of stability and solubility. It has the advantage of easy operation and storage. Percarbonate (sodium percarbonate) has the disadvantage of rapid dissolution and stable but weak to moisture.

Other bleaches include DAPS (diacyl peroxides), which are first used to remove tea rust from garments. Recently used in dishwashers was first introduced in USP5,710,115. The effect is weaker than PB (sodium perborate) and PC (sodium percarbonate), and instead it is known to be effective for rust removal in plastics.

[Alkali silicates]

The use of this raw material serves to assist the cleaning action by maintaining the alkalinity of the cleaning liquid, and at the same time, in addition to the function of preventing corrosion, it has an effect of improving product fluidity. Raw materials that can be used include sodium meta-silicate, sodium di-silicate, zeolite and the like. The amount used is about 5 to 40% by weight.

[enzyme]

In the present invention, an enzyme may be used together with a nonionic surfactant instead of phosphate to enhance cleaning power. The prior art exerts a cleaning power against starch and protein contamination by using a large amount of phosphates, but it is preferable not to use phosphates due to environmental damage to the use of existing phosphates (USP5,750,483). As enzymes that can be used, amylases, proteases, lipases and the like can be used. Here, lipase is an enzyme added for oil removal, but the formulation of the present invention may increase the oil cleaning ability by introducing a lipophilic nonionic surfactant, and thus may be excluded from the prescription. The amount of the enzyme is about 0.2 to 2.0% by weight, respectively, which is a value considering the washing effect and the increase in price compared to the enzyme increase.

[Etc]

In addition to the raw material, the detergent composition of the present invention may be selectively added to the pigment, flavoring, and fungicides.

Hereinafter, the method of manufacturing the detergent composition of the present invention will be described in detail according to the manufacturing procedure.

The manufacturing method of the present invention uses a ribbon mixer or V-type mixer as a stirrer capable of blending a large amount of powder and a small amount of liquid raw material so as to enable uniform stirring as a whole without breaking product properties. The stirring sequence is as follows.

(1) High temperature (40 ~ 60 ℃) for builders that can adsorb a lot of fine powder or nonionic surfactant

Nonionic surfactant in liquid form is sprayed through nozzle to adsorb strongly

To increase the average diameter. The builders include forget-me-not (Na ₂ SO ₄ ), sodium carbonate (Na ₂ CO ₃ ), etc.

There is this.

(2) After the above process, the silicates are added to the detergent surface particles to attach the surface.

Smoothing gives the effect of increasing fluidity. Average of silicates here

It is easy to use a particle diameter of 150 micrometers or less, and having a large surface area.

(3) Next, PB or PC, which is a bleach, is added, and TAED or DADHT, which is a bleach enhancer, is used.

It goes through the process of input.

(4) The final process is the addition of enzymes (proteases, amylases), appropriate flavors and pigments,

A secondary builder is put in to obtain a powder product with a diameter of 150 ~ 1,180㎛.

[Industrial detergent cleaning power test for dishwasher]

[Performance Evaluation Method]

-Performance evaluation is based on the measurement of the overall cleaning index, the bubble test, the stain and the trace test.

It is classified into three kinds. In case of stain and trace test, the type of contamination during the measurement of the washing index

Calculate wash index for ramen broth and margarine corresponding to oil components in

Calculate

<A> Comprehensive Cleaning Index Evaluation

-Comprehensive washing index evaluation applies various pollution to different kinds of tableware,

After installation in the cabin, a detergent sample is added to evaluate the cleaning result.

(1) Types of pollution and application methods

Pollution Application method Remarks 1. Ramen Broth Fill the soup bowl with 2/3 of the soup and continue to pour into the next soup bowl. 1 bowl of 4 countries 2. Black Tea -Put 1 bag of black tea and use it in 1 cup of coffee. 4 cups of coffee 3. tomato cake Apply 1g evenly to -200g glass 3 glass 4. Margarine 0.5g margarine per teaspoon 4 teaspoons 5. Egg Yolk -3g each using a brush on a large plate 4 large platters 4 large 6. Dough -Large flour: powdered milk: water in a ratio of 1: 4: 8, and then mixed with a mixer after mixing with a mixer. 4 medium dishes 4 spoons 7. Gochujang -Apply 3g of experiment spoon to frying cup -Apply to chopsticks 4 porcelain cups 8 chopsticks 8. Rice -Apply 10g to rice bowl and remove it after leaving 3g 3 bowls

(2) Method of drying contaminated tableware

-All contamination should be completed within 2 hours

-Drying should be done at room temperature for more than 4 hours after starting pollution work.

(Pure drying time should be more than 2 hours)

(3) arrangement of tableware

-Contaminated utensils can be stacked when moving to the dishwasher.

Put it in position.

(4) How to wash dishes

-a. Preparation for installation of ADD equipment: Tong Yang Magic DW-121F

b. Cycling Program

-Cleaning Course: Standard Cleaning Course

-Flow: Pre-cleaning (room temperature) → main washing (65 ℃) → rinsing (69 ℃) → drying

-Duration : 60 minutes for cold water (basic)

c. Detergent usage:-Normally 25g for general products and 12.5g for concentrated products

(5) Evaluation

-The workshop where the evaluation is made should maintain the brightness of light above 1,000-1,500 lux.

do.

-The evaluation method should be judged as spots left on tableware.

The larger the spot size, the closer to the defect is determined.

The more the number of spots, the closer to the defect.

-The evaluation is made in three stages, and it is judged as three stages of "good" <2 points>, "bad" <1 point>, and "bad" <0 point>.

-After the determination of each dish according to the above rating system, the total of individual scores is calculated.

Divided by the maximum possible score is the `` washing index '' indicating the washing power (between 0 and 1).

-If the cleaning index is less than 0.7, the performance is judged to be weak.

If more than that, it is determined that the performance is good.

<B> Bubble Test

-For foaming force, use the foaming force measuring device (refer to KS M-2709)

Measure with

(1) Dilute the detergent sample to the standard use concentration to make 200 ml of the sample solution.

(2) The bubble height generated when dropping to the liquid surface for 30 seconds at the height of 900mm at room temperature

Measure and compare the foaming force.

-Bubble power is appropriate for 1 ~ 2cm, and less than 1cm shows the phenomenon that the cleaning power falls.

If it exceeds 2 cm, excessive foam may interfere with the cleaning power.

Examples 1 to 3

According to the composition shown in Table 1 using the above manufacturing process was prepared detergent for dishwasher.

ingredient Example 1 Example 2 Example 3 Polyoxyethylene Alkyl Ether (EO = 40 ~ 60) 3.5 2.5 1.5 Polyoxyethylene alkyl ether (EO = 3-11) 1.5 2.5 3.5 Sodium Carbonate (Na ₂ CO ₃ ) 15.0 15.0 15.0 Forget-me-not (Na ₂ SO ₄ ) 25.0 25.0 25.0 sodium citrate 10.0 10.0 10.0 sodium perborate monohydrate 10.0 10.0 10.0 Tetra acetyl ethylene diamine 2.0 2.0 2.0 Sodium silicate 30.0 30.0 30.0 Amylase 1.0 1.0 1.0 Protease 1.0 1.0 1.0 Others (fragrances and colors) 1.0 1.0 1.0

Evaluation of the prepared samples was tested for its performance using the evaluation method, and the results of experiments based on the evaluation method for the compositions prepared in Examples 1 to 3 are shown in Table 2.

division Example 1 Example 2 Example 3 Total washing index (between 0 and 1) 0.78 0.77 0.74 Smudge and Trace Test 0.75 0.80 0.85 Foaming force test (cm) 1.75 1.5 1.2

Table 2 shows the results of experimenting with two nonionic surfactants by adjusting the mixing ratio. The results show that reducing the hydrophilic nonionic surfactant and increasing the lipophilic nonionic surfactant increases the staining and trace removal ability while reducing the foaming force.

Examples 4-7

According to the composition shown in Table 3 to prepare a detergent for dishwasher using the above manufacturing process.

ingredient Example 4 Example 5 Example 6 Example 7 Polyoxyethylene Alkyl Ether (EO = 40 ~ 60) 5.0 5.0 1.0 1.0 Polyoxyethylene alkyl ether (EO = 3-11) 1.0 5.0 5.0 1.0 Sodium Carbonate (Na ₂ CO ₃ ) 15.0 15.0 15.0 15.0 Forget-me-not (Na ₂ SO ₄ ) 29.0 25.00 29.0 33.0 sodium citrate 10.0 10.0 10.0 10.0 sodium perborate monohydrate 10.0 10.0 10.0 10.0 Tetra acetyl ethylene diamine 2.0 2.0 2.0 2.0 Sodium silicate 30.0 30.0 30.0 30.0 Amylase 1.0 1.0 1.0 1.0 Protease 1.0 1.0 1.0 1.0 Others (fragrances and colors) 1.0 1.0 1.0 1.0

Table 4 shows the results of experiments on the cleaning power of the compositions prepared in Examples 4 to 7 according to the evaluation method.

division Example 4 Example 5 Example 6 Example 7 Total washing index (between 0 and 1) 0.82 0.85 0.73 0.72 Smudge and Trace Test 0.75 0.90 0.89 0.70 Foaming force test (cm) 1.85 1.95 1.1 1.05

Table 4 is an experiment for verifying the mixing ratio of the two nonionic surfactants, the results for the maximum and minimum blending ratio. When the hydrophilic nonionic surfactant was prescribed within 5% by weight, the foaming force did not exceed the maximum (2.0cm). <Example 4,5>, when prescribed more than 1% by weight, the minimum (1.0cm) was lowered. <Examples 6 and 7>. In addition, in the case of using a lipophilic nonionic surfactant, the stain and trace removal test results of more than 0.7 when using more than 1% by weight <Example 7>.

Comparative Examples 1 to 4

According to the composition shown in Table 5 using the above manufacturing process was prepared detergent for dishwasher.

ingredient Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Polyoxyethylene Alkyl Ether (EO = 40 ~ 60) 5.5 0.5 6.0 0.5 Polyoxyethylene alkyl ether (EO = 3-11) 0.5 5.0 6.0 0.5 Sodium Carbonate (Na ₂ CO ₃ ) 15.0 15.0 15.00 15.00 Forget-me-not (Na ₂ SO ₄ ) 29.0 29.5 23.0 34.0 sodium citrate 10.0 10.0 10.0 10.0 sodium perborate monohydrate 10.0 10.0 10.0 10.0 Tetra acetyl ethylene diamine 2.0 2.0 2.0 2.0 Sodium silicate 30.0 30.0 30.0 30.0 Amylase 1.0 1.0 1.0 1.0 Protease 1.0 1.0 1.0 1.0 Others (fragrances and colors) 1.0 1.0 1.0 1.0

Table 6 shows the results of experiments on the cleaning power of the compositions prepared in Comparative Examples 1 to 4 based on the evaluation method.

division Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Total washing index (between 0 and 1) 0.80 0.68 0.77 0.65 Smudge and Trace Test 0.65 0.88 0.90 0.66 Foaming force test (cm) 1.9 0.85 2.25 0.75

In Table 6, when the lipophilic surfactant is prescribed at 0.5% by weight or less, it can be seen that the stain and trace removal effect is significantly reduced (Comparative Examples 1 and 4). In addition, when the hydrophilic nonionic surfactant is prescribed at 0.5 wt% or less, the washing ability is weak. <Comparative Example 2, 4>. In Comparative Example 3, due to the foaming phenomenon, the washing power was reduced rather than the use of 5% by weight of hydrophilic and lipophilic nonionic surfactants, respectively. In addition, due to the increase in the amount of liquid components, detergent particles are larger and the fluidity is lowered.

As described through the above embodiment, the present invention is used by mixing a high alcohol-based non-ionic surfactant having a lipophilic and hydrophilic in a specific mixing ratio to prevent the deterioration of cleaning power due to excessive foaming and to achieve the optimum cleaning power through an appropriate amount of foam In particular, it was possible to provide a dishwasher detergent, in which stains and traces were not left, especially by increasing the grease cleaning power.

Claims (5)

PH containing 1.0 to 5.0% by weight of polyoxyethylene alkyl ether (EO = 40 to 60) and polyoxyethylene alkyl ether (EO = 3 to 11) which are nonionic surfactants, respectively, is weakly alkaline (10 to 12). Detergent composition for dishwasher characterized in that. The general formula of polyoxyethylene alkyl ether (EO = 40 to 60) and polyoxyethylene alkyl ether (EO = 3 to 11), which are nonionic surfactants, according to claim 1, wherein R ₁ -O- (CH ₂ -CH _2). O) mH and R ₂ -O- (CH ₂ -CH ₂ O) nH, where R ₁ has a chain between C10 and C14, R ₂ has a chain between C14 and C18, m is between 40 and 60 , n is a molar number between 3-11. The method of claim 1, wherein the mixing ratio of polyoxyethylene alkyl ether (EO = 40 to 60) and polyoxyethylene alkyl ether (EO = 3 to 11) which is a nonionic surfactant is between 1: 5 and 5: 1. Detergent composition. The detergent composition according to claim 1, further comprising builders, bleaching components, enzymes, etc. in addition to the nonionic surfactant as a main cleaning component. The detergent composition according to claim 1 or 4, which is in powder form.