KR20180041812A - Liquid bleaching agent - Google Patents

Abstract

The purpose of the present invention is to develop a liquid bleaching agent which is easy-to-use and has excellent physical and chemical stabilities. According to the present invention, a liquid bleaching agent composition comprises: a specific organic solvent which is nonpolar and well soluble in water; silica; and solid state peroxides. In addition, the solid state peroxides and silica are adjusted to a predetermined size or less so that sedimentation of solids can be minimized and liquid low viscosity state can be maintained.

Description

[0001] LIQUID BLEACHING AGENT [0002]

The present invention relates to a liquid bleaching composition, and more particularly, to a bleaching agent having a low viscosity at which sedimentation of particles in a liquid phase is minimized by controlling the size of the peroxide particles.

Bleaching agents used as detergents include chlorine bleaching agents and oxygen bleaching agents. Recently, the use of oxygen bleaching agents has been increasing.

The chlorine bleaching agent has a strong bleaching power but has a problem of discoloring color clothing or destroying the fiber structure when bleaching clothes. In addition, there is a problem that an unpleasant odor is generated due to the generation of chlorine harmful to the human body during use.

Oxygen bleaching agents are divided into liquid bleaching agent and powder bleaching agent depending on the form.

Most of the oxygen bleaching agents currently on the market are powder bleaching agents using sodium percarbonate or sodium perborate, and they are disadvantageous in that they are hardly dissolved in water at room temperature, especially in cold water. Furthermore, it is difficult to uniformly mix the respective solid components during the production of the powder bleaching agent, and dust is generated when the powder bleaching agent is used. In particular, when water is absorbed in the atmosphere during storage, it is chemically decomposed to generate oxygen .

However, recently, liquid bleaching agents are more convenient to use than powder bleaching products and tend to be preferred by consumers. Liquid bleaching agents have the advantage that they are easier to meter than powder bleach, dissolve quickly in water, do not generate dust, do not cause chemical degradation during storage, and do not have caking, which is common in powder bleaching agents.

Conventionally, a liquid bleaching agent using hydrogen peroxide as a bleaching agent has been used. However, the liquid bleaching agent using hydrogen peroxide has problems such as swelling of a storage container due to decomposition of hydrogen peroxide during storage and reduction of bleaching power.

In addition, conventional methods of increasing the viscosity of a liquid bleaching agent in order to enhance the chemical stability of the liquid bleaching agent also have a problem that the viscosity of the composition changes due to the decomposition of hydrogen peroxide during storage, making commercialization difficult.

Therefore, there is a need to develop a liquid bleaching agent which is chemically stable as a bleaching agent composed of a solvent in which water is scarcely present, and at the same time, physical stability is secured by adding a thickening agent.

Further, it is necessary to develop a bleaching agent having a low viscosity which is easy to handle and easy to use by maintaining a low viscosity state of a liquid even at room temperature.

DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a liquid bleaching composition comprising a specific organic solvent which is nonpolar and well soluble in water, silica which is a solid thickener, and a peroxide of solid phase, which is convenient for use and which is excellent in physical and chemical stability. The purpose.

It is another object of the present invention to minimize the sedimentation of particles by controlling the average particle size of the peroxide and silica in the range of 0.1 to 100 탆, thereby maintaining a low viscosity state of the liquid phase.

According to an aspect of the present invention, there is provided a non-aqueous organic solvent composition comprising a non-aqueous organic solvent and an inorganic material composed of a solid peroxide having an average diameter of 0.1 to 100 탆 and silica having an average diameter of 0.1 to 100 탆, A liquid bleaching composition is provided.

The non-aqueous organic solvent and the inorganic substance are present in a weight ratio of 1: 0.6 to 1: 2, and the peroxide and the silica are present in a weight ratio of 650: 1 to 7: 1.

Here, the peroxide in the solid phase may be at least one selected from percarbonate, perborate, persulfates and urea peroxide.

The non-aqueous organic solvent is at least one selected from the group consisting of polyalkylene glycols, polyhydric alcohols, alkylene glycols, monoalkyl ethers, alkyl esters and alkyl amides. Among the polyalkylene glycols, polyethylene having an average molecular weight of 400 to 6000 Molecular weight polyethylene glycols having a molecular weight of 400 to 2000 and high molecular weight polyethylene glycols having a molecular weight of 2000 to 6000 are mixed at a weight ratio of 9: 1, preferably 1: 2, and more preferably 2 or more polyethylene glycols having different molecular weights, 1 to 1: 1.

As the solid thickener, silica having an average particle size within a range of 0.1 to 100 mu m is used, and a silica selected from a fatty acid, a crosslinked acrylic copolymer, carboxymethyl cellulose, polyvinyl alcohol, polyvinylpyrrolidone and sodium polyacrylate Lt; RTI ID = 0.0 > a < / RTI >

At this time, the fatty acid may be a mixture of two or more selected from C10 to C18 saturated or unsaturated fatty acids.

The liquid bleaching agent according to one embodiment of the present invention has a water content of 1.0 wt% or less, preferably 0.5 wt% or less, and a viscosity of 1,000 to 50,000 cps (shear rate 20 sec -1 at 50 ° C) , A non-aqueous oxygen bleaching agent characterized in that a solid peroxide in the bleach composition and silica are dispersed in a liquid component to form a suspension.

According to the present invention, it is possible to provide a bleach composition which is easy to handle, use, and has excellent physical and chemical stability by containing a specific organic solvent which is nonpolar and well soluble in water and silica and a peroxide of solid phase.

According to the present invention, it is possible to provide a liquid bleaching composition in which the sedimentation of the particles is minimized and the low viscosity state is maintained by adjusting the average particle size of the peroxide and silica in the solid phase to 0.1 to 100 탆.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described hereinafter. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Hereinafter, the liquid bleaching composition according to the present invention will be described in detail.

Liquid bleaching compositions according to one aspect of the present invention include solid peroxides, non-aqueous organic solvents and silicas.

At this time, it is preferable that the organic solvent, the peroxide, and the inorganic material composed of silica are present in the range of 1: 0.6 to 1: 2.

If the amount of the inorganic substance is less than the above-mentioned range, the bleaching effect is not sufficient. If the amount of the inorganic substance is increased, the liquid bleaching agent may have poor flowability and inconvenience to use.

The peroxide and silica constituting the inorganic material are preferably present in a weight ratio of 650: 1 to 7: 1.

When silica is present in a small amount outside the above-mentioned range, the viscosity is insufficient and the layer separation phenomenon occurs, so that dispersion stability and formulation stability can not be secured.

On the other hand, when too much silica is present, the paste becomes sticky due to excessive viscosity, which makes it difficult to use.

The solid peroxide is a substance capable of forming hydrogen peroxide. Peroxide, perborate, persulfate, urea peroxide and metal peroxide peroxide (ZnO ₂ , MnO ₂ , CaO ₂ ), and the like, and it is preferable to use a percarbonate.

At this time, the percarbonate is a compound composed of a combination of sodium carbonate and hydrogen peroxide, and is an environmentally friendly compound having a high effective oxygen content and a high solubility in water.

It is preferable that the solid peroxide is used in an average particle size in the range of 0.1 to 100 mu m, more preferably in the range of 0.1 to 40 mu m.

Here, when the average particle size is large, the peroxide content of the solid phase can be increased. However, when the average particle size is too large, the sedimentation of the particles in the liquid phase occurs and the dispersion is poorly dispersed. A problem arises.

The non-aqueous organic solvent has a great influence on the chemical and physical stability of the entire composition. Therefore, it is necessary to pay particular attention to the selection thereof. The selective use of such non-aqueous organic solvent is one of the technical features of the present invention.

Here, as the non-aqueous organic solvent, an organic solvent (water-miscible solvent) which is well mixed with water can be used. When the above-mentioned solid peroxide is dissolved in water, it is decomposed to generate oxygen, which adversely affects the chemical stability of the composition do.

Therefore, in the present invention, it is preferable that the non-aqueous organic solvent should be substantially free of moisture (less than 0.5% by weight) and that the organic solvent does not absorb water in the atmosphere.

In addition, the non-aqueous organic solvent used in the present invention is selected so as to have a very low polarity. In other words, solvents with high polarity tend to dissolve peroxides such as percarbonate, so solvents with high polarity such as ethanol or propanol are not recommended.

In addition, the non-aqueous organic solvent used in the present invention should be free of any chemical reaction with other components to be used together, and should select a solvent capable of controlling viscosity and preventing gelation of the composition.

As the non-aqueous organic solvent which satisfies the above-mentioned conditions, the organic solvent usable in the present invention is specifically exemplified by polyalkylene glycol, polyhydric alcohol, alkylene glycol monoalkyl ether, alkyl ester and alkyl amide And mixtures thereof.

The organic solvent is present in a liquid state at a temperature of 30 to 100 DEG C, more preferably 40 to 60 DEG C so as not to decompose the peroxide, and the liquid viscous bleach produced at room temperature should have low viscosity and flowability, , It is better to use the one with low polarity.

Particularly, among polyalkylene glycols, polyethylene glycol having an average molecular weight in the range of 400 to 6000 is preferably used, and more preferably two or more polyethylene glycols having different molecular weights are mixed and used. In this case, a low molecular weight Polyethylene glycol and high molecular weight polyethylene glycol having a molecular weight of 2000 to 6000 are mixed at a weight ratio of 9: 1 to 1: 1.

When the molecular weight of the polyethylene glycol is less than 400, it does not play a proper role in blocking moisture, and it may hinder the decomposition stability of the peroxide. When the molecular weight exceeds 6000, the viscosity of the composition increases, Occurs.

 The amount of the non-aqueous organic solvent used is preferably 35 to 60 wt% of the total weight of the liquid bleaching composition.

If the amount of the non-aqueous organic solvent used is less than 35% by weight, the liquid bleaching agent may not have high flowability due to high viscosity, and if it exceeds 60% by weight, There arises a problem that it is difficult to maintain dispersion stability.

In the present invention, a suspension having excellent physical stability can be produced without using a thickener, but if desired, a more preferable effect can be obtained when a thickener is used.

As a component of the liquid bleaching composition, silica is used as the thickening agent, and preferably fumed silica is used as a colloidal silica in a liquid bleaching agent which is precipitated in a non-aqueous organic solvent or stably dispersed in an unaggregated state Can be generated.

The colloidal silica uses hydrophilic fumed silica having a surface area of 200 m 2 / g and an average particle size in the range of 0.1 to 100 μm or hydrophobic fumed silica having a surface area of 100 m 2 / g and an average particle size in the range of 0.1 to 100 μm.

When the average particle size is large, the silica content can be increased. However, in the case of excessively large silica, sedimentation of the particles in the liquid phase occurs, resulting in poor dispersibility.

 At this time, the content of the colloidal silica in the liquid bleaching agent composition is 0.1 to 5% by weight, more preferably 0.2 to 3% by weight.

As the liquid bleaching agent composition according to the present invention, in addition to the above-mentioned thickening agent, an auxiliary thickener may further be added.

Here, the auxiliary thickening agent may be at least one selected from fatty acid, cross-linked acrylic copolymer, carboxymethyl cellulose, polyvinyl alcohol, polyvinyl pyrrolidone and sodium polyacrylate.

At this time, the fatty acid may be a mixture of two or more selected from saturated or unsaturated fatty acids having 10 to 18 carbon atoms, preferably capric acid, lauric acid, myristic acid, acid and palmitic acid may be used.

The crosslinked acrylic copolymer may be an acrylic acid copolymer crosslinked with 0.75 to 1.5% by weight of polyallyl sucrose. The amount of the crosslinked acrylic copolymer to be used is 0.01 to 1.5% by weight, preferably 0.1 to 2% by weight.

The raw materials and the metallic materials introduced into the manufacturing process (for example, iron, manganese, copper, chromium, etc.) accelerate the decomposition of the peroxides in the solid phase to lower the chemical stability of the final composition and are therefore excluded as far as possible. May include those commonly used in the art.

That is, it may further contain various other small amounts of additives such as an antioxidant, a colorant, a fluorescent whitening agent, an antiseptic agent, a cleansing enzyme and a perfume, and the amount thereof is 0.01 to 5% by weight.

As described above, the low-viscosity liquid bleaching composition of the present invention is a liquid in which the solid phase particles are dispersed in a non-aqueous liquid phase. The liquid peroxide bleaching composition of the present invention includes a peroxide capable of generating hydrogen peroxide, a water-miscible solvent, thickening agnet), it is possible to provide a liquid bleaching composition which is physically and chemically stable for a long period of time, is easy to use, and has excellent bleaching power.

Hereinafter, specific embodiments of the present invention will be described. However, the embodiments described below are only intended to illustrate or explain the present invention, and thus the present invention should not be limited thereto.

Preparation of bleach compositions

Example 1

500 mL of polyethylene glycol was added to a 1 L glass reactor equipped with a three-blade propellar agitator and a jacket, and a few g of polyvinyl pyrrolidone was added to completely dissolve the mixture. Were prepared.

Subsequently, the mixture was added with 0.2% by weight of silica having an average diameter of 10 탆 and stirred for about 1 hour. Several grams of powdery sodium percarbonate having an average diameter of 32 탆 was added and stirred for 45 minutes to prepare a liquid bleaching composition .

Example 2

A liquid bleaching composition was prepared in the same manner as in Example 1 except that the amount of silica added as a mixed solution was 0.5% by weight.

Comparative Example 1

Powdered sodium percarbonate having an average diameter of 32 占 퐉 which was not provided in the form of a liquid bleaching agent composition was used as a bleaching agent.

Comparative Example 2

A liquid bleaching composition was prepared in the same manner as in Example 1, except that silica was not added as a mixed solution.

Comparative Example 3

A liquid bleaching composition was prepared in the same manner as in Example 1, except that the amount of silica added as a mixed solution was 0.1 wt%.

Comparative Example 4

A liquid bleaching composition was prepared in the same manner as in Example 1, except that powdered sodium percarbonate having an average diameter of 900 mu m was used.

Results of measurement of active oxygen content of bleach composition

The bleach compositions prepared according to Example 1 and Comparative Example 1 were stored in an oven maintained at 40 ° C and 80% humidity for 1 month, respectively, and remained in the bleach compositions by titration using potassium permanganate (KMnO ₄ ) The loss of active oxygen was calculated. The results of measurement of the loss of residual active oxygen amount are shown in Table 1 below.

division High humidity stability (40 ℃, 80%) Comparative Example 1 Example 1 Residual active oxygen amount 1 parking 94% 92% 2 parking 90% 91% 3 parking 88% 86%

Referring to the results of Table 1, it was confirmed that the amount of residual active oxygen in the case of Example 1 was similar to that of powdery bleaching agents that were commercially available. That is, it can be confirmed that even if the bleach composition is stored in the form of a liquid for a long period of time as in Example 1, the residual amount of active oxygen can be maintained at a level that can act as a bleaching agent.

200 mL of the bleaching composition prepared according to Example 1, Example 2, Comparative Example 2, Comparative Example 3, and Comparative Example 4 was placed in a glass container and stored at room temperature for one week. Then, The difference in the amount of active oxygen was measured at the point of separation and at the lower end of the glass container.

division Example 1 Example 2 Comparative Example 2 Comparative Example 3 Comparative Example 4 Difference in active oxygen amount 0.3% 0.5% 2.2% 2.7% 3.2% Whether layer separation occurred X X O O O

Referring to the results of Table 2, it can be seen that, in the case of Example 1 and Example 2, the difference in the amount of active oxygen is not more than 0.5% due to no layer separation. On the other hand, in the case of Comparative Examples 2 to 4, it was confirmed that not only the liquid bleaching agent composition was layer-separated but also the difference in the amount of active oxygen was greater than 2%.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention as set forth in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

Claims (7)

Non-aqueous organic solvent; And
An inorganic material consisting of a solid peroxide having an average diameter of 0.1 to 100 mu m and silica having an average diameter of 0.1 to 100 mu m,
Wherein the non-aqueous organic solvent and the inorganic substance are present in a weight ratio of 1: 0.6 to 1: 2,
Wherein the peroxide and the silica are present in a weight ratio of 650: 1 to 7: 1,
Liquid bleaching composition
The method according to claim 1,
Wherein the solid peroxide is at least one selected from percarbonate, perborate, persulfates and urea peroxide.
Liquid bleaching composition.
The method according to claim 1,
Wherein the non-aqueous organic solvent is at least one selected from polyalkylene glycols, polyhydric alcohols, alkylene glycol monoalkyl ethers, alkyl esters and alkyl amides,
Liquid bleaching composition.
The method according to claim 1,
Wherein the non-aqueous organic solvent is polyethylene glycol having an average molecular weight ranging from 400 to 6000,
Liquid bleaching composition.
The method according to claim 1,
Wherein said liquid bleaching composition further comprises at least one auxiliary thickener selected from fatty acids, cross-linked acrylic copolymers, carboxymethyl cellulose, polyvinyl alcohol, polyvinyl pyrrolidone, and sodium polyacrylate.
Liquid bleaching composition.
6. The method of claim 5,
The fatty acids are C ₁₀ to C ₁₈ or more selected from saturated or unsaturated fatty acid of a mixture of two,
Liquid bleaching composition.
The method according to claim 1,
Wherein the liquid bleaching composition further comprises at least one additive selected from antioxidants, colorants, fluorescent whitening agents, antiseposition agents, cleansing enzymes and fragrances.
Liquid bleaching composition.