JP2908600B2 - Bleach composition - Google Patents

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 an alkaline region and is slowed in an acidic region. Therefore, the acidic type is relatively storage stable and is commercially available as a liquid bleach. However, while the acidic type is stable, the bleaching power is weak and cannot be said to be a satisfactory bleaching agent.

On the other hand, as a stabilizer in an alkaline bleach containing hydrogen peroxide, JP-A-52-103386 discloses poly-α-hydroxyacrylate and JP-A-55-103386.
No. 76161 discloses poly-α-hydroxyacrylate and condensed phosphate, and JP-A No. 62-185797 discloses poly-α-hydroxyacrylate.
JP-A-60-146076 discloses a polymaleic acid salt and JP-A-62-32195 as a bleachability improver in an alkaline bleach containing a hydroxyacrylate, an organic phosphonate and hydrogen peroxide. Is a polymaleate,
It is described that a combination of a polyacrylate or a maleic acrylic acid copolymer with a sugar alcohol or the like is effective.

[0004]

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

[0005]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above problems, and as a result, have found that hydrogen peroxide, α-hydroxyacrylate and acrylic acid polymer having a specific range of molecular weight and / or Alternatively, it was found that by blending a maleic acid-based polymer and a surfactant, an alkaline hydrogen peroxide-based bleaching agent exhibiting the stability of an effective component that can be put on the market as a product and having good bleaching power can be obtained. Was completed.

That is, the present invention relates to (a) 0.5 to 10% by weight of hydrogen peroxide, (b) 0.5 to 20% by weight of a surfactant, and (c) poly-α-hydroxyacrylic acid having a molecular weight of 1,000 to 200,000 or a salt thereof. At least one type of hydroxyacrylic acid selected from the polylactones 0.005 to
5% by weight and (d) a polyacrylic acid or a salt thereof having a molecular weight of 500 to 200,000 and / or a maleic acid-based polymer or a salt thereof
A bleaching composition comprising 0.1 to 5% by weight and having a pH of 8 or more.

In the present invention, hydrogen peroxide (a) as a bleaching base is contained in the composition in an amount of 0.5 to 10% by weight, preferably 3 to 7% by weight.
% By weight.

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

The poly (c) component used in the present invention is
α-hydroxyacrylic acid or a salt thereof (sodium, potassium or ammonium) or a polylactone thereof (an intramolecular and / or intermolecular ester obtained by reacting an acid function and an alcohol function of the polymer)
The at least one selected from the group consisting of hydroxyacrylic acid polymers is a compound which is soluble in water and exhibits a chelating effect. For use in the present invention, those having an average molecular weight of 1,000 to 200,000, preferably 2,000 to 100,000 are suitable. Further, as the salt, a sodium salt is preferable. (c) Component is present in the composition
0.005 to 5% by weight, preferably 0.1 to 3% by weight.

The polyacrylic acid or a salt thereof used as the component (d) in the present invention has an average molecular weight of 500 to 200,000,
Preferably it is in the range of 2,000 to 20,000. When the average molecular weight is less than 500 or more than 200,000, the storage stabilizing effect rapidly decreases. Carbopol, which is often used as a thickener in a hydrogen peroxide-based acidic liquid bleach, is a polyacrylic acid having a very large molecular weight, and is partially crosslinked, and is not crosslinked as used in the present invention. It is different from polyacrylic acid.

The maleic acid-based polymer used as the component (d) may be a maleic acid homopolymer or a copolymer of maleic acid with another vinyl monomer (including these partially and completely neutralized salts). Can be Examples of the copolymer include a copolymer of maleic acid and a vinyl monomer selected from acrylic acid, methacrylic acid, acrylic acid ester, methacrylic acid ester, vinyl acetate and the like. Of these, copolymers of acrylic acid or methacrylic acid and maleic acid are preferred. The monomer ratio of maleic acid to other monomers is maleic acid / monomer = 10 / 90-60 / 40
It is desirable to be within the range. The maleic acid-based polymer has an average molecular weight of 500 to 200,000, preferably 500 to 100,000.
Is used. The average molecular weight of the polymer is 500
If it is less than or exceeds 200,000, the storage stabilizing effect rapidly decreases. (d) Component polymer is present in the composition in a total amount of 0.05%.
-5% by weight, preferably 0.5-3% by weight. If the amount of the polymer is less than 0.05% by weight, a sufficient effect cannot be obtained. If the amount exceeds 5% by weight, a problem of separation of the polymer may occur.

The bleaching composition of the present invention contains the above (a) to
In some cases, the following components may be added, if necessary, in addition to the component (d) to improve the stability of the composition. Examples of such components include polyphosphoric acid or a salt thereof, phosphonic acid or a salt thereof, and the like. Specifically, examples of polyphosphoric acid and salts thereof include pyrophosphoric acid, tripolyphosphoric acid, hexametaphosphoric acid, and sodium and potassium salts thereof. Examples of the phosphonic acid or a salt thereof include alkylidene 1,1-diphosphonic acid, aminophosphonic acid, and sodium and potassium salts thereof.

The composition of the present invention is usually balanced by adding water to the above components (a) to (d).
Alcohols such as isopropanol and ethylene glycol, thickeners, fragrances, dyes, fluorescent dyes, enzymes and the like may be added as necessary.

The pH of the stock solution of the composition of the present invention is adjusted to pH 8 or more with sodium hydroxide or potassium hydroxide.
Any material exhibiting strong alkalinity can be used.

[0015]

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 composition having the composition shown in Table 1 was prepared and subjected to the following tests.

(1) Storage stability (accelerated test) Evaluation method The bleaching compositions shown in Table 1 were packed in a light-shielding bottle at 40 ° C.
After storing for a week, the residual ratio of available oxygen was measured.

(2) Bleaching rate of stain stains ・ Evaluation method Table 1 was prepared so that the effective oxygen concentration in tap water at 20 ° C. was 2%.
Dissolve the bleach of the composition shown in, the prepared bleach solution 300m
l Add 5 tea-contaminated cloths prepared as follows
After immersion at 30 ° C. for 30 minutes, it was rinsed with tap water, dried, and the bleaching ratio was calculated by the following equation.

[0019]

(Equation 1)

The reflectance is measured by Nippon Denshoku colorimeter N.
Measured using -DR 101-DP.

Tea-contaminated cloth 80 g of Nitto black tea (yellow package) is boiled with 3 liters of ion-exchanged water for about 15 minutes and then rubbed with desalted cotton. Boil for a minute. It was lowered from the heat as it was, left to stand for about 2 hours, allowed to dry naturally, washed with water until the washing liquid did not become colored, dehydrated, pressed, made into a test piece of 8 × 8 cm, and subjected to an experiment.

(3) Removal of dirt on hard surface dirt The bleaching agent shown in Table 1 is left in the undiluted solution only in the hot water with the tea sieve, and left for 1 hour. After washing with water, it is dried and evaluated according to the following evaluation points. Tea sieve stains are scarcely left. Tea sieve stains are slightly left. △ Tea sieve stains are hardly removed. × The results are shown in Table 1.

[0023]

[Table 1]

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) C11D 3/20 C11D 3/39-3/395 C11D 7/18 C11D 7/26 C11D 7/54 D06L 3 / 02 WPI / L (QUESTEL)

Claims (1)

(57) [Claims] (1) 0.5 to 10% by weight of hydrogen peroxide (b) 0.5 to 20% by weight of a surfactant (c) Poly-α-hydroxyacrylic acid having a molecular weight of 1,000 to 200,000 or a salt thereof or a polylactone thereof At least one selected hydroxyacrylic acid 0.005 to
5% by weight and (d) a polyacrylic acid or a salt thereof having a molecular weight of 500 to 200,000 and / or a maleic polymer or a salt thereof
A bleaching composition comprising 0.1 to 5% by weight and having a pH of 8 or more.