KR20050093913A - Automatic dishwashing detergent composition - Google Patents

Abstract

The present invention relates to a liquid detergent composition for an automatic dishwasher, and in particular, a) cationic surfactant represented by the formula (1), and b) formula (2), which is not only excellent in washing power, hard water resistance, foamability and rinsability, but also high in phase stability. It provides a liquid detergent composition for automatic dishwasher comprising as an active ingredient containing a compound represented by.

Description

Liquid detergent composition for automatic dishwasher {AUTOMATIC DISHWASHING DETERGENT COMPOSITION}

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a liquid detergent composition for an automatic dishwasher, and more particularly, to a liquid detergent composition for an automatic dishwasher having superior phase stability and improved cleaning power, hard water relaxation, and rinsing effect.

[Private Technology]

Liquid detergents for automatic dishwashers are prepared in liquid, powder and tablet form. Powder formulations have disadvantages in that they are inconvenient to use due to the inhomogeneity of the phases during use or the mixing of moisture and the blowing of powders when used for a long time. Tablet type has the advantage of obtaining a uniform composition mainly in the form that is widely used in Europe, but there is a problem in that the cleaning performance and stability deterioration due to the layer separation or hardening phenomenon during storage, the manufacturing cost is high. Liquid type can solve the above-mentioned disadvantages of powder and tablet type and is selectively used due to characteristics such as convenience of use and beauty of appearance, but low phase stability, cleaning power and rinsing function compared to powder and tablet type. It is rated as relative inferior.

At present, the research on the liquid type of the body for automatic dishwasher is continuously made. U.S. Patent 5,880,089 is a dishwashing rinsing agent that increases the rinsability of plastic utensils, and teaches the capping of nonionic surfactants with polyether compounds added mainly to ethylene oxide. Increasing and having high efficiency in hard water, polyacrylic acid polymers and salts thereof are disclosed, and US Pat. No. 6,345,633 also teaches the effect of applying a cationic surfactant to enhance the rinsability of plastic tableware. However, there is a shortage of providing a liquid detergent composition having excellent phase stability and improved cleaning power, hard water softening power, and rinsing effect, and there is a need for continuous research.

In order to solve the above problems, an object of the present invention is to provide a liquid detergent composition for automatic dishwasher excellent in phase stability and at the same time excellent in cleaning power, water softening power and rinsing effect.

In order to achieve the above object, the present invention is a) 0.1 to 10% by weight of the cationic surfactant represented by the formula (1); b) 0.1 to 10% by weight of the compound represented by Formula 2; And c) a residual amount of water.

(Formula 1)

In Formula 1, R ₁ is a linear or branched alkyl group having 12 to 18 carbon atoms, a linear or branched alkenyl group having 12 to 18 carbon atoms, or a mixture thereof,

Each of R ₂ and R ₃ independently of one another is an alkyl group having 1 to 3 carbon atoms,

R ₄ is (CH ₂ CHOHCH ₂ O) _n H,

n is an integer from 1 to 10,

X is an anion selected from the group consisting of chloride, iodide, bromide, methylsulfate, ethylsulfate and sulfate.

(Formula 2)

R _5- (EO) m (PO) nH

In Chemical Formula 2,

R ₅ is an alkyl group having 12 20 carbon atoms,

EO is ethylene oxide,

PO is propylene oxide,

m is an integer from 5 to 15,

n is an integer of 5-15.

Hereinafter, the present invention will be described in detail.

The inventors of the present invention while studying a liquid detergent composition for automatic dishwasher excellent in phase stability, detergency, soft water softening and rinsing effect, when using the cationic surfactant represented by the formula (1) and the compound represented by the formula (2) It was confirmed that one effect was improved, and based on this, the present invention was completed.

Liquid detergent composition for automatic dishwasher of the present invention comprises a compound of Formula 1 and a compound of Formula 2 in 0.2 to 20% by weight as an active ingredient, the remaining amount of water.

Compound represented by the formula (1) according to the present invention is preferably included in 0.1 to 10% by weight in the liquid detergent composition for automatic dishwasher. When the content is less than 0.1 parts by weight, the effect of the cleaning power, foaming ability and hard water softening by the cation may be lowered, and when it exceeds 10% by weight, precipitation and phase stability may be lowered. The compound represented by Formula 1 is preferably a quaternary ammonium compound, and examples thereof include lauryl dimethylbenzl ammonium chloride, stearyl dimethylbenzle ammonium chloride dimethylbenzyl ammonium chloride, disteayl dimethyl ammonium chloride, lauryl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, stearyl trimethyl ammonium chloride (Stearyl trimethyle ammonium chloride), Behenyl trimethyl ammonium chloride) and quaternary ammonium chloride, but are not limited to the above. The compound of formula 1 may be used alone or in admixture of two or more thereof.

It is preferable that the compound of the formula (2) according to the present invention contains m / n of 8/2 to 2/8. This is because if the ratio of ethylene oxide is too high, a large amount of bubbles are generated, which may cause problems in the performance of the washing machine. If the ratio of propylene oxide is too high, phase stability at high temperature may be deteriorated and rinsability may be reduced. Compound of Formula 2 may be included in 0.1 to 10% by weight in the liquid detergent composition for automatic dishwasher. If the content thereof is less than 0.1% by weight, the rinsing property may be enhanced, that is, the effect of removing the film and water droplets after drying of the dishes may be insignificant. If the content exceeds 10% by weight, the rinsing property may be reduced. Examples of the polyoxyalkylene polymer represented by the general formula (2) of the present invention include various specific examples according to alkyl length, EO, number of moles of PO addition, and bonding position, which will be apparent to those skilled in the art.

The liquid detergent composition for automatic dishwasher of the present invention may further include components included in a conventional detergent composition for the purpose of detergent power, appearance maintenance and storage. Examples thereof include pH adjusters, solubilizers, fungicides, flavoring agents, dyes and surfactants, the content of which is appropriately controlled.

Liquid detergent composition for automatic dishwasher according to the present invention is characterized by excellent phase stability and at the same time excellent cleaning power, hard water softening power and rinsing effect.

Hereinafter, examples of the present invention will be described. The following examples are only for illustrating the present invention, but the protection scope of the present invention is not limited to the following examples.

Examples 1 to 7 and Comparative Examples 1 to 3

To the composition (unit: wt%) of Table 1 below, a liquid detergent composition for an automatic dishwasher was prepared by a conventional method. Quaternary ammonium compounds were used as quaternary ammonium chloride.

Comparative example Example One 2 One 2 3 4 5 6 7 Quaternary Ammonium Compounds - 0.5 One One One 2 2 5 10 Alkylpolyoxyalkylene polymer - - 0.5 3 6 3 5 5 5 NaOCl 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Polyacrylate polymer 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 0.07 Stearic acid 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 0.08 KOH One One One One One One One Midyear 10 10 10 10 10 10 10 10 10 baking soda 5 5 5 5 5 5 5 5 5 Silicate Soda 5 5 5 5 5 5 5 5 5 Citric acid soda 10 10 10 10 10 10 10 10 10 Silicone antifoam One One One One One One One One One Sodium xylene sulfonate 2.2 2.5 2.2 2.5 2.2 2.5 2.5 2.5 2.5 Propylene glycol 2 2 2 2 2 2 2 2 2 Purified water To 100 To 100 To 100 To 100 To 100 To 100 To 100 To 100 To 100

Experimental Example

1) Washing machine: LG dishwasher (12 people)

2) Specimen Manufacturing

Psalm 1-Smash rice with a spoon in a frying bowl and dry for 5 hours

Psalm 2-Apply the egg yolks, margarine and skim milk powder 1: 1 to a stainless steel bowl, and dry for 24 hours.

Psalm 3-Take 4 g of red pepper paste, soy sauce, coffee contaminated, and dry for 4 hours after soaking 5 g in air and plastic side dishes

Psalm 4-Evenly spread butter in a large glass cup and dry for 24 hours

Ten rice bowls, soup bowls and cups were used for each test.

end. Detergency Evaluation

Detergent was added to the detergent inlet (20 g each time) and washed with a standard course. At the end of the wash cycle, the dishes were removed, placed on a table and evaluated (above 1,200 LUX). The washing power of the rice bowl and the soup bowl was visually determined, and evaluated according to the criteria of Table 2 below.

Cleaning power (score) Judgment code 8-10 points ◎ 6-7 points ○ 4-5 points △ 0-3 points X

I. Rinsing evaluation

Detergent was added to the detergent inlet (20 g per time) and washed with a standard course. At the end of the wash cycle, the dishes were removed and placed on a table and evaluated (1,200 LUX or more). The rinsing property was determined by the spot number of the glass, and evaluated according to the evaluation criteria of Table 3 below.

Rinseability Judgment code Less than 2 ◎ Less than 5 ○ Less than 10 △ more than 10 X

All. Phase stability assessment

After the detergent was stored for 1 month in a constant temperature bath at 50 ° C. and humidity of 80%, phase separation and precipitation of the contents were confirmed, and evaluated according to the evaluation criteria of Table 4 below.

Stability (Score) Judgment code 8 ~ 10 points ◎ 6-7 points ○ 4 to 5 points △ 0-3 points X

la. Bubble force evaluation

Detergent 5 g, 10 g egg yolk was added to measure the height of the bubble at the highest temperature in the standard course wash state, it is evaluated by the evaluation criteria of Table 5 below.

Bubble height Judgment code Less than 2 cm ◎ Less than 5 cm ○ Less than 8 cm △ More than 10 cm X

hemp. Water resistance evaluation

In the water resistance evaluation method performed in this experiment, as the hardness was gradually increased by artificially manufacturing the hard water, it was determined that the hardness was not changed in the cleaning power as the hard water resistance. Water resistance was evaluated by the evaluation criteria of Table 6 below.

Longitude (PPM) Judgment code 200 ◎ 150 ○ 100 △ 50 X

The cleaning, rinsing, phase stability, foaming, and hard water resistance results of the liquid detergent compositions for automatic dishwashers of Examples 1 to 7 and Comparative Examples 1 to 3 confirmed by the above experiments are shown in Table 7 below.

Comparative example Example One 2 2 3 4 5 6 Cleaning power △ △ ○ ○ ○ ○ ○ Rinseability △ △ ○ ○ ○ ○ ○ Bubble ◎ ◎ ◎ ◎ ◎ ○ ○ Water-resistant ○ ○ ○ ○ ○ ○ ◎ Phase stability ◎ ◎ ◎ ◎ ◎ ◎ ○

In Table 7, the detergent compositions of Examples 2 to 7 exhibited excellent effects in all of the washing power, rinsing property, foaming power, hard water resistance, and phase stability, but the compositions of Comparative Examples 1 and 2 were cleaning power, rinsing property, or foaming power. The effect was insignificant.

The liquid detergent composition for automatic dishwasher of the present invention is not only excellent in washing power, rinsing property, foaming power, and hard water resistance, but also excellent in phase stability.

Claims (3)

a) 0.1 to 10% by weight of cationic surfactant represented by formula (1); b) 0.1 to 10% by weight of the compound represented by Formula 2; And c) remaining water Liquid detergent composition for automatic dishwasher comprising: (Formula 1) In Formula 1, R ₁ is a linear or branched alkyl group having 12 to 18 carbon atoms, a linear or branched alkenyl group having 12 to 18 carbon atoms, or a mixture thereof, Each of R ₂ and R ₃ independently of one another is an alkyl group having 1 to 3 carbon atoms, R ₄ is (CH ₂ CHOHCH ₂ O) _n H, n is an integer from 1 to 10, X is an anion selected from the group consisting of chloride, iodide, bromide, methylsulfate, ethylsulfate and sulfate. (Formula 2) R _5- (EO) m (PO) nH In Chemical Formula 2, R ₅ is an alkyl group having 12 to 20 carbon atoms, EO is ethylene oxide, PO is propylene oxide, m is an integer from 5 to 15, n is an integer of 5-15. The composition of claim 1, wherein the cationic surfactant is quaternary ammonium chloride. The composition of claim 1, wherein the compound of Formula 2 has m / n of 8/2 to 2/8.