JPH05194994A - Bleach composition - Google Patents

Abstract

PURPOSE:To obtain a bleach composition whose effective component is stable and which has good bleaching power by mixing hydrogen peroxide with a surfactant, poly-alpha-hydroxyacrylic acid and a specified phosphonic acid oligomer. CONSTITUTION:This composition comprises 0.5-10wt.% hydrogen peroxide, 0.5-20wt.% surfactant, 0.005-5wt.% at least one hydroxyacrylic acid selected from among a poly-alpha-hydroxyacrylic acid of a molecular weight of 1000-200000, its salt and its polylactone and 0.00-5wt.% oligomer of the formula (wherein Y1 is H, CO-T1; R1, Q1 and T1 are each 1-4C alkyl; and n1 is 1-16) or an alkali metal salt thereof and has a pH of 7 or above. The pH of the above composition before dilution is adjusted with sodium hydroxide, potassium hydroxide or the like to 7 or above, and any strongly alkaline compound can be used as the pH regulator.

Description

Detailed Description of the Invention

[0001]

This invention relates to liquid bleach compositions.

[0002]

2. Description of the Related Art Decomposition of hydrogen peroxide is promoted in the alkaline region and delayed in the acidic region. Therefore, the acidic type is relatively storage stable and is marketed as a liquid bleach. However, while the acidic type is stable, it has a weak bleaching power and cannot be said to be a sufficiently satisfactory bleaching agent.

On the other hand, as a stabilizer in an alkaline bleaching agent containing hydrogen peroxide, Japanese Patent Application Laid-Open No. 52-103386 discloses poly-α-hydroxy acrylate, Japanese Patent Application Laid-Open No. 55-
76161 discloses poly-α-hydroxy acrylate and condensed phosphate, and JP-A-62-185797 discloses poly-α-
Hydroxyl acrylate and organic phosphonate, and as a bleaching improver in an alkaline bleach containing hydrogen peroxide, JP-A-60-146076 discloses polymaleate, JP-A-62-32195 discloses. Is a polymaleic acid salt,
It is effective to combine a polyacrylic acid salt or a maleic acid acrylic acid copolymer with sugar alcohols, and JP-A-58-126364 discloses that a phosphoric acid ester oligomer is used as a stabilizer in an alkaline bleaching solution. A method for bleaching cellulose fibers using the same is described.

[0004]

In order to improve the bleaching power of a bleaching agent containing hydrogen peroxide, it is preferable to make it alkaline, but in that case the storage stability becomes poor and it is difficult to provide it as a product, This problem has not been sufficiently solved by the above technique.

[0005]

Means for Solving the Problems As a result of intensive research to solve the above problems, the present inventors have found that hydrogen peroxide, α-hydroxyacrylate and a specific phosphonic acid oligomer or its alkali metal salt are used. It was found that an alkaline hydrogen peroxide-based bleaching agent exhibiting stability of an active ingredient which can be marketed as a product and having good bleaching power can be obtained by blending with a surfactant, and thus completed the present invention. It was

That is, the present invention provides (a) 0.5 to 10% by weight of hydrogen peroxide (b) 0.5 to 20% by weight of surfactant (c) poly-α-hydroxyacrylic acid having a molecular weight of 1,000 to 200,000 or a salt thereof. 0.005 to 5% by weight of at least one hydroxyacrylic acid selected from the group consisting of polylactones and (d) 0.005 to 5% by weight of an oligomer represented by the following general formula (I) or an alkali metal salt thereof.

[0007]

[Chemical 2]

(In the formula, Y ₁ is hydrogen or —CO-T ₁ , and R ₁ ,
Q ₁ and T ₁ are each an alkyl group having 1 to 4 carbon atoms, n ₁ represents a number of 1 to 16), and pH
Is greater than 7 to provide a bleaching composition.

In the present invention, the bleaching base hydrogen peroxide (a) is 0.5 to 10% by weight, preferably 3 to 7% by weight in the composition.
It is blended by weight%.

Examples of the surfactant (b) used in the present invention include anionic surfactants, nonionic surfactants and amphoteric surfactants. Examples of the anionic surfactant include straight chain or branched chain alkylbenzene sulfonate, alkyl or alkenyl ether sulfate, alkyl or alkenyl sulfate, olefin sulfonate, alkane sulfonate, saturated or unsaturated fatty acid salt and the like. Examples of the nonionic surfactant include polyoxyalkylene alkyl or alkenyl ethers, polyoxyethylene alkylphenyl ethers, higher fatty acid alkanolamides or alkylene oxide adducts thereof,
Sucrose fatty acid ester, fatty acid glycerin monoester,
Examples thereof include alkylamine oxides, pluronic type surfactants, sorbitan fatty acid esters or ethylene oxide adducts thereof. Other examples of the surfactant include carbobetaine, sulfobetaine, amine oxide and the like. The total amount of surfactant in the composition is
It is 0.5 to 20% by weight, preferably 1 to 10% by weight.

The component (c) used in the present invention is poly-
α-Hydroxyacrylic acid or its salt (sodium, potassium or ammonium) or its polylactone (which is an intramolecular and / or intermolecular ester obtained by the reaction of the acid functional group and the alcohol functional group of the polymer)
At least one hydroxyacrylic acid polymer selected from the above is a water-soluble compound having a chelating action, and for use in the present invention, an average molecular weight of 1,000 to 200,000, preferably 2,000 to 100,000 is suitable. The salt is preferably sodium salt. (c) In the composition
The amount is 0.005 to 5% by weight, preferably 0.1 to 3% by weight.

The component (d) of the present invention is a phosphonic acid oligomer represented by the following general formula (I).
It is possible to use the oligomers described in No.

[0013]

[Chemical 3]

Where Y ₁ is hydrogen or -CO-T ₁ and R ₁ ,
Q ₁ and T ₁ are each an alkyl group having 1 to 4 carbon atoms, and n ₁ is a number of 1 to 16. The water-soluble compounds of formula (I) are preferably alkali metal salts, especially sodium salts, especially potassium salts. It is -P (O) (O
All hydrogen atoms of the H) ₂ or —P (O) (OH) 2 group may be substituted with alkali metal atoms, or only a part thereof may be substituted. Appropriate R ₁ , Q ₁
Examples of the alkyl groups of T ₁ and T ₁ include isobutyl, preferably isopropyl group, especially n-butyl and n-propyl group, particularly ethyl and methyl group, and particularly preferably methyl group. When Y ₁ is —CO-T ₁ , T ₁ and R ₁ are preferably the same alkyl group. However, it is preferred that Y ₁ is hydrogen. n ₁ ranges from 1 to
16, especially 1 to 12 are preferred. Here, the oligomer is n
Is a mixture whose main component is about 5 to 9, preferably about 5 to 6. However, oligomers in which n is 1 and oligomers in which n is 12 to 16 are always mixed in a small amount. Preferably, the oligomer represented by the formula (II) or its sodium or potassium salt is used.

[0015]

[Chemical 4]

Here, Y ₂ is hydrogen or —CO—R ₁ , and n ₂ is 1 to
14, R ₁ is as described above. Particularly preferably, (III)
The oligomer represented by the formula or its potassium salt is used.

[0017]

[Chemical 5]

Here, R ₂ is a methyl or ethyl group, and n ₃ is 1.
Through 12. Such phosphonic acid oligomer is special
It can be produced by the method described in −35428. The oligomer as the component (d) is incorporated in the composition in an amount of 0.005 to 5% by weight, preferably 0.01 to 3% by weight.

The bleaching composition of the present invention usually has the above (a) to
(d) Water is added to the component for balance, but alcohols such as ethanol, isopropanol, ethylene glycol, etc., thickeners, fragrances, dyes, fluorescent dyes, enzymes, etc. may be added if necessary. ..

The pH of the undiluted solution of the composition of the present invention is adjusted with sodium hydroxide, potassium hydroxide or the like so that the pH is higher than 7, but any pH-adjusting agent can be used as long as it exhibits strong alkalinity. Is.

[0021]

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

Example 1 A bleaching agent composition having the composition shown in Table 1 was prepared and the following tests were conducted. (1) Storage stability (acceleration test) -Evaluation method The bleaching agent composition shown in Table 1 was packed in a light-shielding bottle and stored at 40 ° C for 2 weeks, and the residual rate of available oxygen was measured. (2) Stain stain bleaching rate-Evaluation method Table 1 so that the effective oxygen concentration is 2% in tap water at 20 ° C.
A bleach solution of 300m prepared by dissolving the bleach of the composition shown in
Add 5 pieces of black tea-contaminated cloth prepared as follows to each l.
After soaking at ℃ for 30 minutes, it was rinsed with tap water and dried, and the bleaching rate was calculated by the following formula.

[0023]

[Equation 1]

The reflectance is a colorimetric color difference meter N manufactured by Nippon Denshoku.
-Measured using DR 101-DP. Black tea-contaminated cloth Nitto black tea (yellow package) 80 g is boiled in 3 liters of deionized water for about 15 minutes, then rubbed with desalted cotton and soaked in cotton gold cloth # 2003 cloth and boiled for about 15 minutes .. It was removed from the heat as it was, allowed to stand for about 2 hours, naturally dried, washed with water until the washing liquid had no color, dehydrated, pressed, and made into a test piece of 8 × 8 cm, which was subjected to an experiment. (3) Stain-removing property of hard surface stains The bleaching agent shown in Table 1 is applied as it is to the hot water with tea sibs and left for 1 hour. After washing with water, it is dried and evaluated according to the following evaluation points. Almost no tea-sib stain remains ... ◯ A little tea-sib stain remains ... △ Little tea-sib stain remains ... × These results are shown in Table 1.

[0025]

[Table 1]

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Claims (1)

[Claims] 1. (a) 0.5 to 10% by weight of hydrogen peroxide (b) 0.5 to 20% by weight of surfactant (c) Poly-α-hydroxyacrylic acid having a molecular weight of 1,000 to 200,000 or its salt or its 0.005 to 5% by weight of at least one hydroxyacrylic acid selected from polylactones and (d) 0.005 to 5% by weight of an oligomer represented by the following general formula (I) or an alkali metal salt thereof: (In the formula, Y ₁ is hydrogen or -CO-T ₁ , R ₁ , Q ₁ and T ₁ are each an alkyl group having 1 to 4 carbon atoms, and n ₁ is a number of 1 to 16) A bleaching composition comprising: and a pH of more than 7.