KR19990042929A - Oxygen Bleach Composition - Google Patents

Abstract

The present invention relates to an oxygen-based bleach composition. More specifically, the present invention relates to an oxygen-based bleach composition having excellent bleaching performance and enhanced solubility in water by containing bleaching component sodium percarbonate and nonionic surfactant sorbitan derivative as main components.

In the case of the conventional oxygen-based bleach, the content of sodium percarbonate, which is the main component of bleaching, is about 40-60% by weight, whereas in the present invention, the content of sodium percarbonate is 87% by weight or more, and the bleaching function is enhanced. The solubility was enhanced by compensating for the decrease in solubility in water, which is a disadvantage of the conventional oxygen-based bleach, and bleach stabilizer protease and starch enzyme were applied to enhance the bleaching power.

Description

Oxygen Bleach Composition

The present invention relates to an oxygen-based bleach composition. More specifically, the present invention relates to an oxygen-based bleach composition having excellent bleaching performance and enhanced solubility in water by containing bleaching component sodium percarbonate and nonionic surfactant sorbitan derivative as main components.

In general, oxygen-based bleaching agents are widely used as a bleaching component, such as sodium percarbonate, sodium perborate, persulfate, and these have a bleaching effect due to the oxidation of oxygen generated by dissolution in water.

Bleach should be easily decomposed during use to show a bleaching effect, as well as excellent stability during manufacture or storage of products. Sodium perborate and sodium percarbonate are currently used as the most practical bleaching ingredients.

Sodium perborate has low solubility and is relatively stable, making it easy to handle and easy to include in the product.However, its high decomposition temperature makes it difficult to achieve bleaching performance under low temperature washing conditions such as Japan and Korea. There are disadvantages. Recently, in terms of environmental aspects, boron contained in sodium perborate harms aquatic organisms and has been debated about the stability of humans or animals when ingested through drinking water.

On the other hand, sodium percarbonate (2Na ₂ CO ₃ ) dissolves well in water and is easy to decompose, so the bleaching effect in use is relatively good, but the temperature, humidity, pH, amount of heavy metals, etc. It is easy to be decomposed according to the conditions of, and also has a disadvantage in that the stability is further lowered when the bleach activator is added to enhance the bleaching effect in low temperature washing conditions.

Therefore, in order to solve the above problems, attempts have been made to minimize the contact with the outside by coating the surface with sodium percarbonate using polymers, organic materials, inorganic salts, and the like. For example, Japanese Patent JP320057 discloses a method of improving stability by mixing sodium percarbonate with a borate solution containing silicate, sulfate, EDTA, and the like, followed by drying and coating, but this is not necessary for an actual product. Although there are disadvantages in using a borate compound which is controversial in terms, German Patent DE4109954 and DE4209924 disclose a method of coating sodium percarbonate with a fatty acid having an alkyl group having 8 or more carbon atoms. Although it is difficult to dissolve in water, it is difficult to fully exhibit the bleaching effect of sodium percarbonate. British Patent GB026296 discloses a technique for coating the surface of sodium percarbonate using an alkali metal salt of citric acid. Alkali metal salt of three As for the builders have relatively poor performance shortcomings.

In addition, the above-mentioned prior arts all use a considerable amount of water to dissolve the coating agent, which is a problem in the stability of sodium carbonate when the temperature is increased to dry the water contained in the coating.

In addition, conventional oxygen-based bleaching agent containing sodium percarbonate as a bleaching component generally contains about 40-60% by weight of sodium percarbonate and has a problem in that its solubility in water is lowered.

The present inventors have studied diligently to solve the above problems, and as a result, the main component of the bleaching component sodium percarbonate and nonionic surfactant sorbitan derivatives as the main component is excellent in bleaching performance without using builders in water The present invention has been accomplished by discovering that an oxygen-based bleach composition having enhanced solubility can be provided.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

Oxygen-based bleach composition according to the present invention is characterized in that it contains 87-97% by weight of sodium percarbonate, 0.1-10% by weight of sorbitan derivatives and 0.001-10% by weight of enzymes.

In the case of the conventional oxygen-based bleach, the content of sodium percarbonate, which is the main component of bleaching, is about 40-60% by weight, while in the present invention, the content of sodium percarbonate is 87% by weight or more, and the bleaching function is enhanced. The solubility was enhanced by compensating for the decrease in solubility in water, which is a disadvantage of the conventional oxygen-based bleach, and bleach stabilizer protease and starch enzyme were applied to enhance the bleaching power.

The composition component of the oxygen-based bleaching agent which concerns on this invention is demonstrated below.

In the present invention, sodium percarbonate (2Na ₂ CO ₃ · 3H ₂ O) is a granular material made of soda ash and hydrogen peroxide, its effective oxygen content is about 12%, and the bleaching action is caused by oxidation of perhydroxy ion. Happens. That is, it is caused by the following reactor mechanism.

Na ₂ CO ₃ 3 / 2H ₂ O →→→ Na ₂ CO ₃ + 3 / 2H ₂ O ₂

^{_{H 2 O 2 + OH - →→→}} H 2 O + HOO - ( an alkali solution)

In the present invention, when the content of sodium percarbonate is 87% by weight or less, the bleaching function is reduced, and when the content of sodium percarbonate is 97% by weight or more, maintaining stability during storage of sodium percarbonate and enhancing low temperature solubility in water There is a disadvantage in that the content of the additives used for the reduction is relatively low and thus does not play a sufficient role.

The sorbitan derivatives are stable and non-ionic in the aqueous solution of non-ionic surfactants (trade name: Tween, USA ICI) and bleach, which are prepared by adding ethylene oxide to sorbitan ester commercially available from ICI of USA. It is a mixture of nonyl phenyl emulsifiers to enhance the wetting and penetrating effect of carbonate. This sorbitan derivative causes sodium percarbonate to immediately react with each other when dissolved or dispersed in the wash water to form a uniform dispersion or solution of the bleach active compound throughout the wash water, whereby the fabric to be treated and the bleach active compound A more effective contact is made between them, resulting in more effective stain removal. It also provides redeposition and continuous contamination prevention of fabric contamination.

In the present invention, when the content of the sorbitan derivative is 0.1% by weight or less, the solubility of the bleach decreases, and when the content of the sorbitan derivative is 10% by weight or more due to the physical properties of the sorbitan derivative in the form of a paste (agglomeration) of some sodium percarbonate during manufacture The phenomenon occurs, manufacturing workability is lowered, there is a disadvantage that the effect of improving the solubility is not obtained.

Common water dispersible organic binders used as matrices for coating and encapsulation to shield sodium percarbonate from continuous exposure and protection from exposure to the external environment include polyglycols, polyalkylene oxides, C ₁₂ -C ₂₀ Alpha-olefin sulfonates and the like, but preferred organic binders are ethoxylated nonionic surfactants which are solid at room temperature, i.e., melting points up to 20 ° C or higher, preferably 30 ° C or higher, more preferably 60 ° C or higher. Has

Ethoxylated nonionic surfactant components can be broadly defined as compounds produced by the condensation of ethylene oxide groups (hydrophilic) with organic hydrophobic compounds, which may be aliphatic or alkyl aromatic in nature. Suitable nonionic surfactants include polyethylene oxide condensates of alkyl phenols, linear or branched aliphatic C ₈ -C ₂₀ primary or secondary alcohols and polyethylene oxide condensates, reaction products of propylene oxide and ethylenediamine and ethylene oxide condensation. By product.

The nonionic surfactant (NP 9 mol) used in the present invention is a condensation product of alkyl phenol and ethylene oxide having an alkyl group containing 6-12 carbon atoms in a straight or branched chain arrangement as a polyethylene oxide condensate of alkyl phenol (the One ethylene oxide is present in an amount of 9 moles per alkyl phenol water).

Some proteins are water-soluble, but protein contamination such as fatty acid glyceride skin depleted substances, blood, protein-based foods, and molds secreted from the human skin is trapped in fibrin and does not dissolve or disperse in water or other organic solutions. Many of them are not easily removed by the action of percarbonate, but they act in combination to decompose and remove water-soluble amino acids.

Also note that amylase is an enzyme that breaks down starch. Particularly suitable for this role in addition to the bleach should be the selection of stable enzymes for bleach, such as protease (trade name: Durazyme) and amylase (trade name: Duramil) and the amount of enzymes commonly used It is 0.001-10 weight% according to the activity, Preferably it is 0.1-5 weight%. If it is less than 0.001% by weight, there is a problem in that the degradation of the protein and starch is poor because of the action of the enzyme, and more than 10% by weight is uneconomical.

Hereinafter, an Example demonstrates this invention in more detail. However, the present invention is not limited to the examples described later.

<Example 1-3>

After the preparation of the oxygen-based bleach according to the composition of Table 1, the bleaching performance and the cleaning power when the detergent and bleach are mixed was tested compared to the currently available bleach.

Component composition ratio of oxygen-based bleach ingredient Content (% by weight) Example 1 Example 2 Sodium percarbonate 87 96.9 Sorbitan derivatives 10 0.1 NP9 mol 1.5 1.5 incense 0.5 0.5 Bleach stabilized protease 0.9 0.9 Bleach Stabilized Starch 0.1 0.1

<Bleaching performance test>

Bleaching performance test was conducted under the following test conditions, and the results are shown in Table 2 and Table 3.

Washing machine: Terg-O-Tometer

Whiteness Tester: Evaluate bleaching by measuring the change in reflectance (whiteness) of light on each bleached cloth using colorgard 2000.

Bleach Use: Add 0.22, 0.33, 0.44 (g / l) of bleach to determine the standard use of normal bleach, and use bleach to determine the standard use of bleach when staining and staining. Input 7 (g / l) and measure the whiteness according to the amount of use.

Temperature: 25 ℃, 40 ℃

Bleaching time: 10 minutes

Rinse time: 3 minutes twice

Measured contaminant: Use of standard bleaching force contaminated cloth (EMPA 111, EMPA 112, EMPA 115)

Bleaching performance test result at 25 ℃ Bleach Use (g / l) Whiteness Example 1 Example 2 0 30.03 30.03 0.22 62.65 62.81 0.33 63.49 63.88 0.44 63.98 64.34 3 66.23 68.02 5 67.51 69.30 7 67.95 69.72

Bleaching performance test result at 40 ℃ Bleach Use (g / l) Whiteness Example 1 Example 2 0 41.25 41.25 0.22 62.98 63.05 0.33 63.87 64.15 0.44 64.08 64.32 3 69.89 70.85 5 72.45 72.67 7 73.72 73.82

As can be seen from Tables 2 and 3, these results indicate that the amount of bleaching performance of 0.33 g / litre, bleaching, and stinging at normal bleaching is 5 grams / liter, indicating sufficient bleaching performance. It can be seen that is better.

<Detergency test when mixing bleach and detergent>

In order to find out that an improved cleaning power can be obtained compared to the comparative powder detergent by adding the standard amount of the bleach determined by the results of Tables 2 and 3 to the general laundry detergent (1 g), the results were tested as follows. Same as 4, 5.

Washing machine: Terg-O-Tometer

Whiteness Meter and Cleaning Power Calculation: Color change 2000 is used to measure the change in the reflectance (whiteness) of light on each contaminant before and after cleaning, and the whiteness value is measured by Kubelka-Munk. Substitute the formula to calculate the cleaning power

Temperature: 25 ℃, 40 ℃

Laundry time: 10 minutes

Rinse time: 3 minutes twice

Measured contaminated cloth: Standard bleaching force test used (EMPA, WFK)

Detergent test results when mixing detergent (1g / 1L) and bleach at 25 ℃ Bleach Use (g / l) Cleaning power Example 1 Example 2 0 71.145 71.145 0.33 73.45 73.85 5 79.90 80.35

Detergent test results when mixing detergent (1g / 1L) and bleach at 40 ℃ Bleach Use (g / l) Cleaning power Example 1 Example 2 0 73.22 73.22 0.33 78.00 79.30 5 88.95 89.27

As can be seen from Tables 4 and 5, the bleaching agent of the present invention was added to the laundry detergent to improve the cleaning power, and the results were better than the control test performed at low and high temperatures.

As described above, the oxygen-based bleaching agent according to the present invention contains sodium percarbonate, which is a bleaching component, and a sorbitan derivative, which is a nonionic surfactant, as the main components, so that the bleaching performance and solubility in water are excellent.

Claims (1)

An oxygen-based bleach composition comprising 87-97 wt% of sodium percarbonate, 0.1-10 wt% of sorbitan derivatives, and 0.001-10 wt% of enzymes.