JPH1150094A - Detergent composition for clothes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition capable of exhibiting a graying- suppressing effect and an excellent sebum stain-washing force by including a surfactant, an N,N-bis(carboxymethyl)glutamic acid salt and polyethylene glycol. SOLUTION: This composition comprises (A) 10-50 wt.% of a surfactant (preferably an anionic or nonionic surfactant), (B) 1-40 wt.% of an N,N-bis(carboxymethyl)glutamic salt of the formula [M is H, an alkali (alkaline earth) metal, ammonium, a basic amino], and (C) 1.0-5 wt.% of polyethylene glycol having a weight-average mol.wt. of 1,000-20,000. The composition preferably further contains 0.5-5 wt.% of an unsaturated carboxylic acid polymer having a weight-average mol.wt. of 1,000-150,000. Thereby, the detergent composition having an effect for suppressing a graying phenomenon which is a problem on the washing of clothes and capable of exhibiting an excellent whiteness- maintaining effect is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition for clothing having an excellent whiteness maintaining effect when washing clothing. The present invention relates to a detergent composition for clothing having an effect of suppressing graying, which is often a problem in laundry of clothing.

[0002]

2. Description of the Related Art A detergent for clothing is used to remove from a washing liquid a surfactant which solubilizes stains and dissolves and disperses the fibers from the fiber into the washing liquid, and calcium and magnesium which lower the ability of the surfactant. It is composed of a sequestering agent, an alkali agent that promotes decomposition and solubilization of dirt, a polymer compound for dispersing dirt, and other cleaning builders.

[0003] The basic concept of the components to be blended in the detergent for clothing has been reached without much change so far.
Specific components have been reviewed for environmental considerations. One of them is to make the detergent phosphorus-free. In the past, phosphorus compounds such as sodium tripolyphosphate were blended in clothing detergents as sequestering agents. However, as these phosphorus compounds are concerned as one of the causes of eutrophication in lakes and marshes, crystalline sodium aluminosilicate having a specific structure (in the art, Zeolite) is a major component of sequestering agents because it has no problems with phosphate-type builders and is more stable in recent years.

[0004] On the other hand, as for the shape of the detergent, various shapes such as liquid, slurry, paste, powder or granule, tablet or rod have been proposed, and many technologies have been applied and published in each of them. Was. Among these shapes, the high bulk density of powder detergents in the late 1980's has been the mainstream of compact detergents at present because compactness greatly contributed to transportation, carrying and storage. .

[0005] Zeolite is widely used as a phosphorus-free builder, but its hardness sealing mechanism is based on ion exchange instead of chelate formation like phosphate. Therefore, the exchange rate is kinetically limited by the diffusion of the exchange ions in the zeolite. Therefore, there is a problem that it takes a long time for ion exchange in washing with low water temperature and short time, and the washing power is insufficient. In particular, the exchange of large Mg ions in the hydrated shell takes a very long time.

[0006] From the above-mentioned performance problems of zeolite,
Research and development of biodegradable organic builders other than zeolites have been conducted. For example, a specific organic builder obtained by reacting epoxysuccinic acid or maleic acid with aspartic acid and a detergent composition containing the same are disclosed in JP-A-5-17714.
JP-A-6-248300 discloses a detergent composition containing a specific amount of a builder comprising hydroxyiminodisuccinic acid.

[0007] N, N-bis (carboxylmethyl) glutamate is superior to the organic builder in the ability to block the hardness component and the biodegradability, and disclosed in Japanese Patent Application Laid-Open No. 63-267751. ) The formulation of glutamate as a detergent builder has been suggested.

[0008]

Among the organic chelating agents, the amino polycarboxylic acid type is excellent in the ability to block the hardness component, and exhibits high sebum detergency when combined with a surfactant. However, with repeated washing,
There was a problem that clothing was grayed. Graying is caused by the transfer of inorganic components, such as soot, in soil to other clean fiber surfaces during washing. An object of the present invention is to provide one of aminopolycarboxylic acids, N, N
An object of the present invention is to find a detergent composition containing bis (carboxylmethyl) glutamate, which has an effect of suppressing graying and has excellent sebum dirt cleaning power.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies on the detergent composition for clothing to solve the above-mentioned problems, and found that a surfactant, N, N-bis (carboxylmethyl) glutamate, The present inventors have found that a detergent composition for clothing containing polyethylene glycol can solve the above problems, and have completed the present invention.

That is, the present invention provides: (a) 10 to 50% by weight of a surfactant; (b) 1 to 40% by weight of N, N-bis (carboxylmethyl) glutamate represented by the following general formula:

[0011]

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[In the formula, M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or a basic amino group, and a plurality of Ms may be the same or different. (C) to provide a detergent composition for clothing containing 1.0 to 5% by weight of polyethylene glycol having a weight average molecular weight of 1,000 to 20,000.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, anionic and nonionic surfactants are blended as the component (a). Examples of the anionic surfactant include an alkylbenzene sulfonate having 8 to 16 carbon atoms and an alkane sulfonate (SA
S), α-olefin sulfone salts, sulfate salts of primary and secondary higher alcohols, α-sulfofatty acid ester salts, nonionic surfactants such as polyoxyethylene alkyl ethers having 8 to 22 carbon atoms, Oxyethylene alkyl phenyl ether, higher fatty acid alkanolamide or its alkylene oxide adduct, alkylamine oxide and the like. The surfactant is incorporated in an amount of 15 to 50% by weight, preferably 25 to 45% by weight. In this range, sufficient detergency can be obtained, and production is easy.

The component (b), N, N-bis (carboxylmethyl) glutamate, is represented by the following general formula.

[0015]

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[In the formula, M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or a basic amino group, and a plurality of Ms may be the same or different. The component (b) is present in the composition in an amount of 1 to 40% by weight, preferably 3% by weight.
-30% by weight. If it is less than 1% by weight, a sufficient cleaning effect cannot be obtained, and if it exceeds 40% by weight, it is difficult to produce a detergent.

The component (c) of the present invention has a weight average molecular weight of 1,000.
20,000, preferably 4,000-15,000 polyethylene glycol, and its blending amount is 0.5-5% by weight, preferably 1-3% by weight.

The detergent composition of the present invention comprises the above (a)
In addition to the essential components (b) and (c), other optional components as described below can be contained.

Examples of the amphoteric surfactant include amino acid type surfactants and N-acyl amino acid type surfactants. Also,
In a small amount, a cationic surfactant can be used in combination. Quaternary ammonium salts and the like can be used as the cationic surfactant.

In particular, it is preferable that the detergent composition for clothing of the present invention contains a carboxylic acid polymer as the component (d). As the carboxylic acid-based polymer, those having a weight-average molecular weight of from 1,000 to 150,000, preferably from 10,000 to 100,000, containing a monoethylenically unsaturated monocarboxylic acid unit and / or a monoethylenically unsaturated dicarboxylic acid unit are used. It is preferable to blend a carboxylic acid-based polymer such as a copolymer represented by the following formula (VI) and / or a homopolymer represented by the following formula (VII). The copolymer is generally a random polymerization.

[0021]

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Wherein Z is an olefin having 1 to 8 carbon atoms,
Maleic acid (anhydride) such as acrylic acid, methacrylic acid, itaconic acid, methallyl sulfonic acid, or a salt of a copolymer of maleic anhydride and a monomer copolymerizable with maleate, and m is a weight average molecular weight of the copolymer. 1000-1500
The value indicates 00. M is _{Na, K, NH 4, H} . )

[0023]

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(Wherein P is a monomer capable of being homopolymerized, and examples thereof include acrylic acid, methacrylic acid, and maleic acid. M ′ is a homopolymer having a weight average molecular weight of 1,000 to
It is a value indicating 150000. Homopolymers are Na, K,
It has become a salt such as NH _4. Among these carboxylic acid-based polymers, salts of acrylic acid-maleic acid copolymers and polyacrylates (Na, K, NH
₄ ) is particularly excellent. The weight average molecular weight is suitably from 1,000 to 80,000. Some or all of these polymers may be salts. The unsaturated carboxylic acid type polymer as the component (d) may be incorporated in the composition in an amount of 0.5 to 5% by weight, preferably 1 to 4% by weight. If the amount is less than 0.5% by weight, a sufficient effect cannot be obtained, and if it exceeds 5% by weight, the solubility of the detergent is undesirably reduced.

Other builders include zeolite crystalline aluminosilicates, sequestering agents such as crystalline silicates described in JP-A-7-89712 and JP-A-60-227895, and ethylenediamine tetrasilicate. Acetic acid (EDTA)
And an organic metal ion sequestering agent such as citrate; an alkali metal carbonate such as soda ash; and an alkali agent such as an alkali metal silicate such as JIS No. 1, 2 or 3 sodium silicate,
An extender such as sodium sulfate, polyvinylpyrrolidone (P
Dispersants or color transfer inhibitors (PVP) such as VP) and polyvinyl alcohol (PVA) and carboxymethyl cellulose; bleaching agents such as sodium percarbonate;
No. 6700, a bleaching activator such as tetraacetylethylenediamine (TAED), an enzyme such as protease, cellulase, amylase and lipase; an enzyme stabilizer such as boron compound and sodium sulfite; a biphenyl type;
Conventionally known components such as a stilbene-type fluorescent dye, a silicone / silica-based antifoaming agent, an antioxidant, a bluing agent, and a fragrance can be blended in a known blending amount. Specific examples of the above components include those described in JP-A-8-218093.

As the production method, a conventionally known production method can be used, and the production conditions are easily selected by those skilled in the art under appropriate conditions according to the composition.

[0027]

According to the present invention, there can be obtained a detergent composition for clothing having an effect of suppressing graying which is often a problem in laundry of clothing.

[0028]

EXAMPLES The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples.

Example 1 Various detergent compositions were prepared according to the formulations shown in Table 2, and the following evaluations were made. Table 2 shows the results.

<Evaluation Method for Detergency of Sebum / Carbon Soil> (1) Preparation of Sebum / Carbon Soil Contaminated Cloth

[0031]

[Table 1]

1 kg of the composition shown in Table 1 was dissolved and dispersed in 80 liters of perclene, and a cloth # 2023 was soaked with dirt to adhere dirt. Then, the perchlen was dried and removed to prepare a sebum / carbon stained cloth. .

(2) Cleaning Conditions and Evaluation Method The above-prepared 10 liters were added to 1 liter of the aqueous cleaning agent solution for evaluation.
Five artificially stained cloths (cm × 10 cm) were put and washed at 100 rpm with a tergotometer. The washing conditions are as follows. Washing conditions Washing time 10 minutes Detergent concentration 0.067% Water hardness 3 水 DH water temperature 20 ° C Rinse with tap water 5 minutes Washing power is the reflectance at 550nm of the original cloth before and before and after washing at 550nm. The cleaning rate (%) was determined by the following formula, and the measured average value of the five sheets was shown as the cleaning power.

[0034]

(Equation 1)

<Testing Method for Preventing Soot Soil Recontamination> A cotton white cloth (gold cloth 2003 cloth) was cut into a piece of 10 cm × 10 cm to make a set of five pieces. 0.25 g of carbon was added to 1 liter of the aqueous detergent solution for evaluation, and a test was carried out with a tart gometer under the following conditions. Cleaning conditions Cleaning time 10 minutes Detergent concentration 0.067% Water hardness 3 ゜ DH water temperature 20 ° C Rinsing 5 minutes in tap water The re-contamination prevention performance is the reflection at 550nm of the original cloth (white cloth) before cleaning and the contaminated cloth after testing. The rate was measured with a self-recording colorimeter (manufactured by Shimadzu Corporation), and the recontamination prevention rate was determined by the following equation.

[0036]

(Equation 2)

[0037]

[Table 2]

(Note) The symbols in Table 2 have the following meanings. LAS: Alkylenebenzenesulfonic acid “alkene L (alkyl chain having 10 to 14 carbon atoms)” manufactured by Nisseki Detergent Co., Ltd. neutralized with 48% NaOH AS: Dovanol 25 sulfate (C manufactured by Mitsubishi Chemical Corporation) ₁₂ -C ₁₅ sodium salt, SFE sulfate): palm oil-derived, alpha-sulfo fatty acid methyl ester soda fatty acid salt: tallow derived fatty soda AE: Nonideddo _{S-7 (C 12, C} 13 E alcohol
Crystalline silicate: SKS-6 (δ-Na ₂ Si ₂ O ₅ , crystalline layered silicate, average particle diameter 20 μm, manufactured by Hoechst Tokuyama Co.)・ Amorphous silicate: JIS No. 2 sodium silicate ・ Dense grain ash: sodium carbonate ・ Zeolite: 4A zeolite, average particle size 3 μm ・ APC: N, N-bis (carboxymethyl) glutamic acid tetrasodium salt ・ PAA: sodium polyarylacrylate , Average molecular weight 1200
0 ・ PEG: polyethylene glycol, average molecular weight 600
0 ・ Fluorescent dye: Tinopearl CBS (Ciba-Geigy)
And Whitetex SA (manufactured by Sumitomo Chemical Co., Ltd.) in the same weight ratio.・ Fragrance: Uses the flavor composition described in Examples of JP-A-8-239700. ・ Enzyme: Sabinase 12.0T type-W (Protease, manufactured by Novo Nordisk), Lipolase 100T (Lipase, manufactured by Novo Nordisk), Termamyl 60T (amylase, manufactured by Novo Nordisk) and KAC500 (alkali cellulase, manufactured by Kao Corporation) in a weight ratio of 2: 1: 1: 1.
What was blended in the ratio of

Continued on the front page (72) Inventor Tomoki Yanagisawa 1334 Minato, Wakayama City, Wakayama Prefecture Kao Corporation Research Institute (72) Inventor Sachiko Kamioka 1334 Minato, Wakayama City Wakayama Prefecture Kao Corporation Laboratory

Claims (2)

[Claims] (1) 10 to 50% by weight of a surfactant (b) 1 to 40% by weight of an N, N-bis (carboxylmethyl) glutamate represented by the following general formula: [In the formula, M represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium or a basic amino group, and a plurality of M may be the same or different. (C) A detergent composition for clothing containing 1.0 to 5% by weight of polyethylene glycol having a weight average molecular weight of 1,000 to 20,000. 2. The composition according to claim 1, further comprising a weight average molecular weight of 10
0.5 to 150,000 unsaturated carboxylic acid-based polymer
The detergent composition for clothing according to claim 1, which contains 5% by weight.