JPH10245593A - Powder bleach composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a powder bleach composition adapted so that the dissolution of the constituent bleaching activator comprising a fatty acid ester of a hydroxybenzenecarboxylic acid may be accelerated to form an organic peroxy acid at good efficiency within a short time and to improve the bleaching performances. SOLUTION: This composition contains sodium percarbonate, a bleaching activator represented by the formula and sodium carbonate in such amounts that the ratio sodium percarbonate/bleaching accelerator ratio is 6-30 by weight, the formulation ratio sodium carbonate/bleaching accelerator is 4-25 by weight, and the content of the bleaching accelerator is 1-10wt.% based on the composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a powder bleach composition, and more particularly to a powder bleach composition having high bleaching power for lipophilic stains.

[0002]

BACKGROUND OF THE INVENTION Bleaching agents are classified into chlorine bleaching agents and oxygen bleaching agents. Chlorine bleaching agents are limited in the types of fibers that can be used and cannot be used in colors and patterns. Oxygen bleaching agents that do not have these disadvantages have recently become very popular because of their inherent odor.
Among this oxygen bleach, sodium percarbonate and sodium perborate are used as powder oxygen bleach,
Hydrogen peroxide is used as a liquid oxygen bleach. However, these oxygen-based bleaches have a lower bleaching power than chlorine-based bleaches, and their improvement is required.

[0003] In order to compensate for these drawbacks, it has been practiced to increase the bleaching power by using a bleach activator in combination. Representative examples of such a bleaching activator include tetraacetylethylenediamine, acetoxybenzenesulfonates, tetraacetylglycolyl, glucose pentaacetate and the like. However, these bleach activators react with hydroperanions in a washing bath to produce peracetic acid, and have a high effect on hydrophilic stains, but have no effect on lipophilic stains. have.

The present inventors have disclosed a bleaching composition containing a bleaching activator having an alkyl group in JP-A-6-316700 as a bleaching activator having improved this disadvantage. JP-A-8-157877 discloses p-
Disclosed are fatty acid esters of hydroxybenzene carboxylic acid. Such bleach activators have very high bleaching power on lipophilic stains due to the affinity between the alkyl groups and the stains, but have low solubility in water. Organic peracids are hardly generated, and a certain amount of time is required to effectively obtain bleaching power.

Accordingly, an object of the present invention is to provide a powder bleaching agent which promotes the dissolution of a bleaching activator comprising a fatty acid ester of hydroxybenzenecarboxylic acid, efficiently produces an organic peracid in a short time, and improves the bleaching performance. It is to provide a composition.

[0006]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by blending sodium percarbonate, sodium carbonate and a fatty acid ester of hydroxybenzenecarboxylic acid in a specific ratio. And completed the present invention.

That is, the present invention comprises sodium percarbonate, a bleaching activator represented by the general formula (I) (hereinafter abbreviated as bleaching activator (I)) and sodium carbonate. The mixing ratio with the activator (I) is sodium percarbonate / bleaching activator (I) (weight ratio) = 6 to 3
0, the mixing ratio of sodium carbonate and bleach activator (I) is sodium carbonate / bleach activator (I) (weight ratio) = 4
And the content of the bleach activator (I) in the composition is 1 to 25.
It is intended to provide a powder bleach composition characterized by being 10% by weight.

[0008]

Embedded image

[0009]

Embodiments of the present invention will be described below in detail.

The bleach activator composition of the present invention contains a bleach activator (I), sodium percarbonate, and sodium carbonate. Those represented by the formula (I-1) are preferred.

[0011]

Embedded image

The content of the bleach activator (I) in the composition of the present invention is 1 to 10% by weight, preferably 2 to 7% by weight, more preferably 3 to 6% by weight. When the content of the bleaching activator (I) is less than 1% by weight, sufficient bleaching power cannot be obtained, and when it exceeds 10% by weight, unbleaching occurs during actual use, and efficient bleaching cannot be performed. .

The content of sodium percarbonate in the composition of the present invention is preferably from 20 to 70% by weight, more preferably from 30 to 70% by weight, more preferably from 35 to 65% by weight, in order to achieve the above object.
Is particularly preferred. Further, the content of sodium carbonate in the composition of the present invention is preferably 20 to 70% by weight, more preferably 25 to 65% by weight, and more preferably 25 to 55% by weight in order to achieve the above object.
Is particularly preferred.

The bleach activator (I) used in the present invention has a very high bleaching effect due to the affinity between the nonyl group and the stain, but has a low solubility in water. It is hard to say that organic peracid is not effectively generated and bleaching is efficiently performed. However, sodium percarbonate and sodium carbonate and the bleach activator (I) have a certain ratio, namely sodium percarbonate and bleach activator (I).
With sodium percarbonate / bleach activator (I)
(Weight ratio) = 6 to 30, preferably 8 to 14, more preferably 10 to 13, and sodium carbonate and bleach activator (I)
With sodium carbonate / bleach activator (I)
(Weight ratio) = 4 to 25, preferably 4 to 20, and more preferably 5 to 10, the production rate of organic peracid can be remarkably improved, and bleaching can be performed very efficiently. It was done. When the ratio of sodium percarbonate / bleach activator (I) (weight ratio) is 6 to 30, and the ratio of sodium carbonate / bleach activator (I) (weight ratio) is 4 to 25, the production rate of organic peracid is improved. And a satisfactory bleaching performance cannot be obtained.

As described above, in the present invention, in order to dissolve the specific water-insoluble bleach activator (I) to improve the bleaching performance, sodium percarbonate and sodium carbonate are used as described above. They were blended in a ratio.

The bleach activator (I) of the present invention is used by formulating it by a generally known method, for example, a method such as extrusion granulation or tumbling granulation by adding a binder such as polyethylene glycol or fatty acid. Is also good.

The bleaching composition of the present invention may optionally contain a surfactant. The surfactant used in the present invention can be selected from an anionic surfactant, a nonionic surfactant, a cationic surfactant and an amphoteric surfactant. Examples of surfactants used in the present invention include alkyl benzene sulfonates, alkyl or alkenyl ether sulfates, alkyl or alkenyl sulfates, olefin sulfonates, alkane sulfonates, saturated or unsaturated fatty acid salts, alkyl or Anionic surfactants such as alkenyl ether carboxylate salts, α-sulfofatty acid salts or α-sulfofatty acid esters, polyoxyethylene or polyoxypropylene or a copolymer thereof, polyoxyethylene alkyl or alkenyl ethers, polyoxyethylene Non-ionic surfactants such as alkyl phenyl ethers, higher fatty acid alkanolamides or alkylene oxide adducts thereof, sucrose fatty acid esters, alkyl glycosides, amine oxides, sulfo Examples include amphoteric surfactants such as betaine and carbobetaine, and cationic surfactants such as quaternary ammonium salts.

Of these, alkyl (C ₁₀ -C ₂₀ )
Benzenesulfonates, alkyl or alkenyl (C
₁₀ -C ₂₀₎ sulfates, alkyl or alkenyl (C ₁₀ ~
C ₂₀ ) ether sulfates, polyoxyethylene alkyl or alkenyl ethers (ethylene oxide addition mole number 4 to 30, alkyl or alkenyl group carbon number 10 to 2)
0), quaternary ammonium salts having at least one alkyl group having 10 to 20 carbon atoms are particularly preferred. These surfactants are preferably incorporated in the composition of the present invention in an amount of 0.1 to 20% by weight, preferably 0.1 to 10% by weight.

Further, the bleaching composition of the present invention may optionally contain a sequestering agent. The sequestering agent used in the present invention includes: (1) a phosphoric acid compound such as phytic acid or an alkali metal salt or an alkanolamine salt thereof (2) ethane-1,1-diphosphonic acid, ethane-1,1 , 2-Triphosphonic acid, ethane-1-hydroxy-1,1-diphosphonic acid and derivatives thereof, ethanehydroxy-1,1,2-
Triphosphonic acid, ethane-1,2-dicarboxy-1,2-
Phosphonic acid such as diphosphonic acid, methanehydroxyphosphonic acid or an alkali metal salt or alkanolamine salt thereof (3) 2-phosphonobutane-1,2-dicarboxylic acid, 1-phosphonobutane-2,3,4-tricarboxylic acid, α- Phosphonocarboxylic acids such as methylphosphonosuccinic acid or alkali metal salts or alkanolamine salts thereof (4) aspartic acid, glutamic acid, amino acids such as glycine or alkali metal salts or alkanolamine salts thereof (5) nitrilotriacetic acid, Iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid,
Aminopolyacetic acid such as triethylenetetramine hexaacetic acid, diencoric acid or the like or an alkali metal salt or alkanolamine salt thereof Organic acids such as oxydisuccinic acid, gluconic acid, carboxymethylsuccinic acid, and carboxymethyltartaric acid; or alkali metal salts or alkanolamine salts thereof. (7) Alkali metal salts or alkanolamine salts of aluminosilicate represented by zeolite A (8 Examples thereof include aminopoly (methylenephosphonic acid) or its alkali metal salt or alkanolamine salt, and polyethylene polyamine poly (methylenephosphonic acid) or its alkali metal salt or alkanolamine salt. Of these, at least one selected from the group consisting of the above (2), (5), (6) and (7) is preferred, and at least one selected from the group consisting of the above (2) is more preferred. The amount of the sequestering agent is 0.0005 to 5% by weight based on the bleaching composition of the present invention.
Preferably, the content is 0.01 to 1% by weight.

Further, in addition to the above components, known components which are usually added to a powder bleaching composition can be added to the bleaching composition of the present invention. For example, an alkaline agent such as JIS No. 2 sodium silicate, or another inorganic salt such as sodium sulfate, and a fluorescent whitening agent such as Tinopearl CBS (manufactured by Ciba-Geigy) and Cinopearl SWN (Ciba・ Geigy Co., Ltd.), fluorescent whitening agents such as color index fluorescent whitening agents 28, 40, 61, 71, and conventionally known enzymes (cellulase, amylase, protease, lipase) for improving bleaching performance. ) Can be added as needed.

Further, in the present invention, various trace additives such as coloring agents such as dyes and pigments, fragrances, silicones, bactericides and ultraviolet absorbers can be added in appropriate amounts.

[0022]

According to the present invention, it is possible to provide a bleaching composition which can efficiently produce an organic peracid in a short period of time and which has extremely excellent bleaching power especially for lipophilic stains.

[0023]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Examples 1 to 4 and Comparative Examples 1 to 3 A bleaching activator represented by the general formula (I-1) (hereinafter abbreviated as bleaching activator (I-1)), sodium percarbonate, A bleach composition having the composition shown in Table 1 was prepared using sodium carbonate and the following optional components. The obtained bleaching agent composition was measured for peracid generation rate and bleaching performance by the following methods. Table 1 shows the results.

Alkyl (C ₁₂ ) sodium benzenesulfonate (b-1) Polyoxyethylene (EO = 10) lauryl ether (b-2) Dequest 2010 (phosphonic acid chelating agent; manufactured by Nippon Monsanto Co.) 1) <Measurement method of peracid generation rate> 1000 ml of 25 ° C ion-exchanged water was placed in a 1-liter glass beaker containing a cylindrical stirrer piece having a diameter of 10 mm and a length of 30 mm, and stirred at 100 rpm. The bleaching composition shown in Table 1 was added all at once, and after a predetermined time shown in Table 1, 10 ml of a 0.3% catalase aqueous solution was added, and the mixture was further stirred for 1 minute. The concentration of the produced organic peracid was measured by iodometric titration. The acid generation rate was determined.

<Measurement method of bleaching performance> 10 g of the powder bleaching composition shown in Table 1 was added to a 2 liter aqueous solution containing 0.0833% of a commercially available detergent solution (pH = 10.2), and a black tea-stained cloth prepared as described below was prepared. (Hydrophilic stain) and 5 pieces of curry-stained cloth (lipophilic stain) were immersed for 10 minutes each. Then, it was rinsed with tap water, dried, and the bleaching ratio was calculated by the following equation.

[0027]

(Equation 1)

The reflectance is NDR-10 manufactured by Nippon Denshoku Industries Co., Ltd.
Measured with DP using a 460 nm filter.

Preparation of black tea-contaminated cloth 80 g of Nitto black tea (yellow package) was boiled with 3 liters of ion-exchanged water for about 15 minutes, filtered with bleached cotton after desizing, and cotton gold cloth # 2003 was immersed in this liquid. Boil for about 15 minutes. The sample was taken out of the fire and left for about 2 hours, then taken out and air-dried, washed with water until the washing liquid did not color, dehydrated, pressed, and subjected to an experiment as a 10 × 10 cm test piece.

Preparation of Curry-Contaminated Cloth After the solid content of house food retort curry (curry Marche) was removed with a mesh, the resulting liquid was heated to boiling. Cotton gold cloth # 2003 was dipped in this solution and boiled for about 15 minutes. After being removed from the heat and left at room temperature for about 2 hours, the cloth was taken out, excess curry liquid adhering to the cloth was removed with a spatula, and the cloth was air-dried. Then, it was pressed and used as a 10 × 10 cm test piece in the experiment.

[0031]

[Table 1]

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Muneo Aoyagi 1334 Minato, Wakayama City, Wakayama Pref.

Claims (3)

[Claims] 1. A bleach activator comprising sodium percarbonate, a bleach activator represented by the general formula (I) (hereinafter abbreviated as bleach activator (I)) and sodium carbonate. The mixing ratio with (I) is sodium percarbonate /
The bleaching activator (I) (weight ratio) is 6 to 30, and the mixing ratio of sodium carbonate and the bleaching activator (I) is sodium carbonate / bleaching activator (I) (weight ratio) = 4 to 25. A bleach activator (I) having a content of 1 to 10% by weight in the composition. Embedded image 2. The powder bleach composition according to claim 1, further comprising a surfactant. 3. The powder bleach composition according to claim 1, further comprising a sequestering agent.