JP2960310B2 - Detergent composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent composition mainly comprising a nonionic surfactant. More specifically, the present invention relates to a detergent composition having a high cleaning performance and a high dyeing property of an optical brightener on a cloth.

[0002]

BACKGROUND OF THE INVENTION Optical brighteners, also known as fluorescent brighteners, are commonly used in laundry detergents. The optical brightener adheres to the cloth where it absorbs ultraviolet radiant energy and emits blue light. This reduces or eliminates the yellowish tint of the fabric and gives the fabric a more whitened appearance.

In conventional detergents mainly comprising an anionic surfactant, an optical brightener has given sufficient dyeing properties. But,
In detergents based on alkoxylated nonionic surfactants, optical brighteners, especially anionic optical brighteners, are solubilized in their micelles and have less optical brightener dyed on fabrics, The drop of the fluorescent dye on the clothes causes a decrease in the whiteness of the clothes, and the effect is not sufficient.

For example, as a detergent mainly composed of an alkoxylated nonionic surfactant, JP-A-6-17098 discloses a specific ratio of an alkyl sulfate salt, an alkoxylated nonionic surfactant and the remaining water. Discloses a method of obtaining a granular detergent composition by mixing a liquid surfactant composition containing a high-speed liquid with a particulate starting material containing a builder or the like to increase the density. In addition, 4-2296
No. 0 discloses a liquid detergent composition containing a specific ratio of an anionic surfactant, polyoxyethylene alkylene ether or alkylphenyl ether or fatty acid amide or amine oxide, an organic chelating agent, and water. Furthermore, Japanese Patent Publication No. 3-58399 discloses a liquid detergent composition containing a specific ratio of ES, a nonionic surfactant, an alkali metal salt of lower alkylbenzenesulfonic acid, and polyethylene glycol.

However, each of these publications does not mention at all about the dyeing property of the optical brightener to the cloth, and has a sufficient detergency in a detergent mainly containing an alkoxylated nonionic surfactant. A composition having improved dyeing properties has not been known. In particular, anionic optical brighteners are inexpensive and highly effective, and are therefore widely used in detergents, and their use is also desired in detergents mainly composed of alkoxylated nonionic surfactants.

[0006]

Means for Solving the Problems The inventors of the present invention have made intensive studies to solve the above problems, and as a result, have found that a detergent mainly composed of an alkoxylated nonionic surfactant has a specific sulfate ester type shadow. By adding the ionic surfactant in a ratio of 50: 1 to 4: 1, the dyeing property of the optical brightener on the cloth can be improved without impairing the detergency for oils such as sebum which is a characteristic of the conventional nonionic detergent. I found it to grow.

That is, the present invention relates to (a) 5 to 40% by weight of an alkoxylated nonionic surfactant (b) Nato of an alkyl sulfate having an alkyl chain length of 10 to 18
Potassium salt or potassium salt (c) the following formula

[0008]

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Anionic optical brightener represented by the formula: 0.005
0.5% by weight, and the weight ratio of (a) :( b) is 50:
The present invention provides a detergent composition having a ratio of 1 to 4: 1. Hereinafter, each component of the present invention will be described.

[Nonionic surfactant] The alkoxylated nonionic surfactant used in the present invention is a main detergent component. Such alkoxylated nonionic surfactants are widely used as compounds prepared by condensation of an alkylene oxide group (hydrophilic group) with an organic hydrophobic compound (which may be aliphatic or alkylaromatic in nature). Can be defined. The length of the polyoxyalkylene group that condenses with any particular hydrophobic group can be adjusted to yield a water-soluble compound having the desired balance of hydrophilic and hydrophobic elements. Examples of suitable non-ionic surfactants are as follows.

1. Polyethylene oxide condensates of alkylphenols, e.g.
Condensation products of alkylphenols having 12 alkyl groups with ethylene oxide, said ethylene oxide being present in an amount of from 5 to 16 mol per mol of alkylphenol. The alkyl substituent in such compounds can be derived, for example, from polymerized propylene, di-isobutylene, octene or nonene. Other examples include dinonylphenol condensed with 15 moles of ethylene oxide per mole of phenol: nonylphenol condensed with 9 moles of ethylene oxide and di-iso-condensed with 15 moles of ethylene oxide per mole of nonylphenol.
There is octylphenol.

2. Condensation products of linear or branched primary or secondary aliphatic alcohols having 8 to 20 carbon atoms with 1 to 16 moles of alkylene oxide per mole of alcohol. Preferably, the aliphatic alcohol contains 9 to 15 carbon atoms and is ethoxylated with 5 to 12 moles, preferably 5 to 9 moles, of ethylene oxide per mole of aliphatic alcohol. Such non-ionic surfactants are
It is preferable from the viewpoint that good or excellent cleaning performance is imparted to grease stains. Preferred surfactants are linear primary alcohols such as those derived from natural fats or myristyl alcohol, cetyl alcohol,
Stearyl alcohol) or partially branched primary alcohols such as Dobanols and Neodols having about 26% 2-methyl branches (Dovanol and Neodol are trade names of Shell). Or Synperonics which are believed to have about 50% 2-methyl branches (Symperonic is a trade name of ICI), or Lia by Liquichimica.
Prepared from primary alcohols having a branched chain structure of more than 50%, sold under the trade name l). Specific examples of the nonionic surfactant falling within the scope of the present invention include dovanol 45-4, dovanol 23-6, dovanol 45-7, dovanol 45-11, dovanol 91-3, dovanol 91-.
6, dovanol 91-8, symperonic 6, symperonic 14, condensation product of coco alcohol with an average of 5 to 12 moles of ethylene oxide per mole of alcohol (an average of 5 to 12 moles per mole of coco alcohol and alcohol)
Moles of ethylene oxide (the alkyl portion of coconut alcohol has 10 to 14 carbon atoms) and condensation products of tallow alcohol with an average of 7 to 12 moles of ethylene oxide per mole of alcohol (the tallow portion is Mainly containing 16-20 carbon atoms). Secondary linear alkyl ethoxylates, especially those having 9 to 16 carbon atoms in the alkyl group and up to 11 and especially 3 to 9 ethoxy groups per molecule (Tergito)
l) Ethoxylates of the system (Targitol is a trade name of Union Carbide) are also suitable for the compositions of the present invention.

3. A compound formed by condensing ethylene oxide with a hydrophobic substrate formed by the condensation of propylene oxide and propylene glycol. The molecular weight of the hydrophobic moiety generally falls in the range of about 1500-1800. like this,
Wyandotte Chemical Cor
It is commercially available under the trade name Pluronic supplied by Poration. Preferred nonionic surfactants are coco alcohol having 6 ethoxy groups per molecule and dovanol 45-7 (a primary alcohol having 14 to 15 carbon atoms having 7 ethoxy groups per molecule). Trade name).

The alkoxylated nonionic surfactant (a) is present in the composition in an amount of 5 to 40% by weight, preferably 10 to 40% by weight.
% By weight, more preferably 10 to 25% by weight.

[Anionic surfactant] The component (b) of the present invention includes an alkyl chain having an alkyl chain length of 10 to 18.
For sodium sulfate or potassium salt of sulfuric acid ester
Can be.

In the present invention, the weight ratio of the nonionic surfactant (a) to the anionic surfactant (b) is (a) :( b) = 50: 1 to 4: 1, preferably 10: 1 to 1
The ratio is 4: 1, and within this range, the dyeing ability of the optical brightener on the cloth is increased without impairing the washing property against oil stains and the like, which is a characteristic of the conventional nonionic detergent. This weight ratio is 5
When the ratio is 0: 1 or less, the dyeing property of the optical brightener is equivalent to that of the nonionic surfactant alone, and no improvement effect is observed.
On the other hand, if the ratio is 4: 1 or more, the cleaning property against oil stains and the like, which is a characteristic of the nonionic detergent, is impaired.

[Optical Whitening Agent] The optical whitening agent useful in the composition of the present invention is an anionic fluorescent whitening agent, and particularly a compound represented by the following formula (compound name; 4,4′-di ( 2-sulfostyryl) biphenyl disodiumsalt)
Is preferably represented by This optical brightener is
Tinopal C from Ciba-Geigy
It is commercially available under the trade name BS-X.

[0018]

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Further, other anionic fluorescent whitening agents may be included. For example, it is selected from compounds having the following structural formula.

[0020]

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Here, R is -N (CH ₂ CH ₂ OH) ₂ , -NCH ₃ (CH ₂ C
H ₂ OH), is selected from -NHCH _3, NHC ₆ H _5, and a morpholino group.

The composition of the present invention preferably contains 0.005 to 0.5% by weight of one or more anionic optical brighteners.

Optional Components In addition to the above essential components, the compositions often contain a series of optional components used in conventional amounts for their known functions. These optional ingredients generally increase and enhance the cleaning performance of the composition. Examples of such optional ingredients include flavors, enzymes, inorganic salts, bactericides, antioxidants, silicones, antifoaming agents such as fatty acids, builders (e.g., sodium tripolyphosphate, citric acid, zeolites,
Oil-absorbing carriers such as silicates and amorphous silica compounds, and sodium polyacrylate). Preferred saturated or unsaturated fatty acids have from 10 to 18 carbon atoms in the alkyl chain. In particular, fatty acids having 12 to 18 carbon atoms in the alkyl chain are preferred. Corresponding soaps can be used equally. Such fatty acids or soaps, up to 10% by weight of the composition,
Often used in amounts of 1 to 5% by weight.

[0024] Detergent enzymes generally promote and enhance certain stain removal. Suitable enzymes are proteases, amylases, lipases, glucose oxidases, cellulases or mixtures thereof. Proteases and cellulases are preferably used in the detergent compositions of the present invention. They are often present in compositions from about 0.01% to about 2% by weight.
Used in quantity.

Builders, for example, sodium tripolyphosphate, citric acid, sodium polyacrylate, having a particle size of 1 μm to 10 μm
Fully hydrated zeolite A, silicate or a combination thereof having a μm is often present in the composition in an amount of from 2 to
Used in an amount of 50% by weight.

[0026]

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

Next, the present invention will be described in detail with reference to Examples, but it should not be construed that the invention is limited thereto. In the examples, "%" indicates% by weight unless otherwise specified.

Example 1 Various detergent compositions having the compositions shown in Table 1 were prepared, and the detergency against the sebum stained cloth and the amount of the fluorescent agent attached were evaluated by the following methods.

Preparation of sebum stained cloth (artificially stained cloth) * Model sebum composition Cottonseed oil 60% Cholesterol 10% Oleic acid 10% Palmitic acid 10% Liquid and solid paraffin 10% The above composition was prepared using a cotton cloth of 10 cm × 10 cm. And a small amount of carbon black (20 g / 1000 g of model sebum) were dissolved and dispersed in perchlorethylene to uniformly adhere dirt to a cotton cloth and air-dried.

◎ Washing Conditions and Evaluation Method 10 cm × 10 3 prepared above in 1 liter of detergent aqueous solution for evaluation.
Five pieces of cotton sebum stained cloth (artificial stained cloth) or cotton knitted cloth (cloth not dyed with a fluorescent dye) were placed in a cotton cloth and washed with a tergotometer at 100 rpm under the following conditions. (Washing conditions) Washing time 10 minutes Washing concentration 0.0833% Water hardness 4 ° DH Water temperature 20 ° C Rinse Batch rinsing 3 minutes (100 rpm with tergotometer) (1) Washing power The reflectance at 550 nm of the contaminated cloth before and after cleaning was measured using a spectral colorimeter (Model N-300 manufactured by Nippon Denshoku).
A) was measured, and the cleaning rate (%) was determined by the following formula (Table shows the average value of the measurements on five sheets).

[0031]

(Equation 1)

(2) Fluorescence Intensity The fluorescence intensity on the cloth was measured by measuring the reflectance of the cotton fabric after washing with a visible light cut filter (U-360 Filter / 360 nm).
Using a colorimetric colorimeter (Nippon Denshoku)
Model ND (F) -300A), and the value was taken as the fluorescence intensity (Table shows the average value of the measurements on five sheets)

[0033]

[Table 1]

Note) * 1 Oil-absorbing carrier: Toxir (Tokuyama Soda Co., Ltd.), oil absorption capacity 350ml / 100g.

Example 2 Powder raw materials (4A zeolite, oil-absorbing carrier, sodium carbonate, sodium polyacrylate, fluorescent dye, reducing agent, anionic surfactant, sodium silicate, polyethylene glycol) in the amounts shown in Table 2 Into a batch kneader, gradually introduce a liquid or semi-liquid nonionic surfactant shown in Table 2, and then add and mix an enzyme and a small amount of type 4A zeolite to obtain a final detergent having the composition shown in Table 2. Was. Various cleaning compositions having the compositions shown in Table 2 were evaluated for cleaning power and fluorescence intensity in the same manner as in Example 1.

[0036]

[Table 2]

Note: * 1 DM type fluorescent dye is a compound having the following structure.

[0038]

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* 2 Oil-absorbing carrier: Toxir (Tokuyama Soda Co., Ltd.), oil-absorbing capacity 350 ml / 100 g.

Example 3 In the same manner as in Example 2, the detergent compositions shown in Table 3 were prepared. Table 3 shows the fluorescence intensities obtained by the same evaluation as in Example 1 for the detergent compositions of each composition.

[0041]

[Table 3]

Continuation of the front page (56) References JP-A-6-220499 (JP, A) JP-A-56-95996 (JP, A) JP-A-63-61095 (JP, A) JP-A-4-267000 (JP) JP-A-6-116598 (JP, A) JP-A-2-129298 (JP, A) JP-A-6-220498 (JP, A) JP-A-4-502172 (JP, A) (58) Surveyed field (Int.Cl. ⁶ , DB name) C11D 1/66-1/722 C11D 1/12-1/14 C11D 3/42 C11D 3/34 WPI / L (QUESTEL)

Claims (1)

(57) [Claims] (1) 5 to 40% by weight of an alkoxylated nonionic surfactant (b) Nato of an alkyl sulfate having an alkyl chain length of 10 to 18
Potassium salt or potassium salt (c) the formula ## STR1 ## below A detergent composition comprising 0.005 to 0.5% by weight of an anionic optical brightener represented by the formula: and wherein the weight ratio of (a) :( b) is 50: 1 to 4: 1.