JPS6177607A - Stabilized sodium percarbonate composition - Google Patents

Abstract

PURPOSE:To obtain the titled compsn. causing no adverse effect on detergency and bleaching power when it is used together with a detergent by using a specified Mg salt, alkali or alkaline earth metal sulfate, or chloride as stabilizer for H2O2 contained as a component of sodium percarbonate. CONSTITUTION:A compsn. is obtd. by coating sodium percarbonate with a mixture consisting of each at least one selected from the group I and II described hereunder. Group I: Mg salts of arom. hydrocarbon sulfonate, Mg salts of sulfuric ester of ethylene oxide adduct of alkyl-substituted arom. hydroxy hydrocarbon, Mg salts of sulfuric ester of aliphatic alcohol, and Mg salts of sulfuric ester of ethylene oxide adduct of aliphatic higher alcohol. Group II: Sulfates or chlorides of alkali or alkaline earth metal. The above-described sodium percarbonate compsn. has superior stabilizing effect, and there is no danger for causing ignition or abnormal decomposition. Further, the compsn. has superior compatibility with builder, stabilizing effect for builder, and bleaching power. Therefore, excellent detergent incorporated with a bleaching agent is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composition in which sodium percarbonate, which is widely used as an oxygen bleach, is stabilized.

Soda percarbonate is widely used, especially as a household bleaching agent, but it is also prized as a cleaning agent, slime remover, oxygen generator, disinfectant, etc.

Soda percarbonate is a type of oxygen-based bleach, but oxygen-based bleach has a weaker bleaching blade than chlorine-based bleach, but it does not fade the color of dyed fabrics, especially dyed fabrics, and it does not fade the yellow color of chemical fibers. It has the advantage of not causing any changes, and is affordable in terms of price.
Widely used for household use.

Other oxygen-based bleaches include sodium perborate, which is widely used in Europe and America.

However, sodium perborate has a high operating temperature of 60°C or higher, and the Japanese custom of doing water work such as washing and bleaching at home at a low temperature of 40°C or lower means that soda percarbonate, which does not require a high operating temperature, is preferred. In addition to being liked and consumed in large quantities, it does not pollute wastewater and has a favorable effect in terms of pollution prevention.

However, sodium percarbonate has the drawbacks of poor stability against moisture and instability against bilge, a detergent.

For this reason, detergents containing purulent agents are sold and used in large quantities in Europe and America, but their development has been delayed in Japan.

Conventionally, inorganic magnesium compounds such as magnesium sulfate, magnesium chloride, and magnesium carbonate have been known as stabilizers for hydrogen peroxide, which is a component of sodium percarbonate. The stabilizing effect is not sufficient.

The present inventors have previously discovered that the compounds of group (I) described below have an excellent stabilizing effect on sodium percarbonate (Special Publication No. 170079/1982).

(I) (a) Magnesium salt of aromatic hydrocarbon sulfonate, (b) Magnesium sulfate ester of ethylene oxide adduct of alkyl-substituted aromatic hydroxy hydrocarbon, (c) Magnesium sulfate ester of aliphatic higher alcohol-J salt, and (d) sulfate ester magnesium salt of the higher alcohol with ethylene oxide.As a result of further intensive research, the present inventors found that (II) ) group of compounds, i.e., by coating sodium percarbonate with a mixture containing sulfates or hydrochlorides of alkali or alkaline earth metals, stabilizing effects, economic efficiency, and safety can be obtained in practical use. I discovered that.

The present invention is characterized in that at least one compound is selected from the compounds of group (I) and group (II), and sodium percarbonate is coated with a mixture thereof.

Stabilized Sodium Percarbonate Compositions [Provided that the selection of compounds from group (I)
c) and (d).

The compound of (1)(a) above is benzene.

Magnesium salts of sulfonic acids such as toluene, xylene, ethylbenzene, cumene, and naphthalene, or magnesium salts of sulfonic acids such as linear or branched alkylbenzenes or naphthalene, whose alkali salts are known to have surface activity, can be used. However, the alkyl group as a side chain of such hydrocarbons has an intermediate carbon number up to C, which is more often used as a side chain alkyl group of the surfactant than the alkyl group of C and C above. For example, compounds having a C hexyl group or a C dodecyl group can also be preferably used.

(1) As the compound (b), a sulfuric acid ester salt of an ethylene oxide adduct of an aromatic human 0oxy compound having a side chain of an alkyl group having a carbon number of about C to C is preferably used, such as a nonylphenol polyoxy Magnesium salts of sulfuric esters of ethylene ether or octylphenol polyoxyethylene ether, etc. can be used. Furthermore, in addition to the above, compounds in which the aromatic nucleus of the above compounds is substituted with a sulfone group can be used. As the polyoxyethylene group, those having about 2 or more oxyethylene units are used as usual.

(I) As the higher alcohol used in the compound (c), any of natural higher alcohols with C or higher and made from animal and vegetable oils and fats, synthetic higher alcohols and synthetic secondary alcohols using the oxo method and Ziegler method may be used. Compounds that can be used can also be preferably used.

As the compound (I) (d), a magnesium salt of polyoxyethylene ether ft acid ester of higher alcohol is used like the compound (1) (c). As the polyoxyethylene group, one having a polymer chain of C or more is used as usual. .

Group (II) compounds include sulfates and silicates of alkali metals and alkaline earth metals; examples of alkali metals include sodium and potassium; examples of alkaline earth metals include magnesium and calcium; Sodium sulfate and magnesium sulfate are preferably used.

The stabilizer used in the present invention includes a compound of group (I) and a compound of group (II).
) Group of compounds are used as a mixture, and whether each compound has a stabilizing effect on sodium percarbonate even as a single substance, or 1) The combination of the two shows a synergistic effect and each compound is used alone. It can show superior effects. The mixing ratio used is in the range of about 10:1 to 1:10.

The stabilized sodium percarbonate composition of the present invention has an excellent stabilizing effect, the stabilizer used is easily available, and the coating operation can be easily performed, so it is inexpensive, and it can be used with peroxide. It is chemically stable and poses no danger of ignition or abnormal decomposition.

As described above, the stabilized composition of the present invention is stable, has excellent compatibility with bilgoo, has excellent stability against bilgoo, and has excellent bleaching properties, so it can be used with detergents to improve detergency and bleaching properties. An excellent bleach-containing detergent can be obtained without any adverse effects on the product.

In order to obtain the sodium percarbonate stabilized composition of the present invention using the above-mentioned stabilizer, the above-mentioned stabilizer is powdered and then coated by adding the above-mentioned stabilizer before or after the drying process of the soda percarbonate. However, a general mixer is used for this purpose. Alternatively, a method can be used in which the stabilizer is made into an aqueous solution and is sprayed or sprinkled onto the sodium percarbonate crystals or granules obtained from the soda percarbonate manufacturing process, mixed, and then dried, but it is not possible to uniformly disperse the stabilizer. Any method may be used as long as it can be done. The stabilizer is used in an amount of 1 to 10% based on the sodium percarbonate.

Below, the test results of the stability test of the stabilized composition obtained by the present invention are shown as an example.

Example: An aqueous solution of a stabilizer was sprinkled and mixed with dried sodium percarbonate (available oxygen: 13.5 $), and then dried at 80°C for 1 hour. Synthetic zeolite Ig was added to 9 g of the resulting sodium percarbonate composition.
The mixture was left to stand for 48 hours at a temperature of 65° C. and a relative humidity of 80%, and then the effective oxygen residual rate was measured by iodometry.

For comparison purposes, the same test was conducted using sodium percarbonate insects containing no stabilizer and using each stabilizer alone. The results are shown in Table 1 as a comparative example.

111th old 1. Display of the case 1982 Patent Application No. 197710 2 Name of OII Stabilized Sodium Percarbonate Composition 3 Person making the amendment Relationship to the case Patent Applicant Name (Name) Japan Synthetic Detergent Co., Ltd. Nippon Peroxide Stock Company 4, Agent 112 Address 2-1-2-6 Koishikawa, Bunkyo-ku, Tokyo Subject of amendment Column 7 for detailed description of the invention in Specification 1 Contents of amendment (1) In the if table on page 1 of the specification, "m-" described in "Stabilizer section in the column of Group I stabilizers, Example number °° ratio-t"
The description of sodium xylene sulfonate °° has been corrected to rm-magnesium xylene sulfonate j.

(2) In Table 1 and Table 1 (Tsugusa) on pages 10 and 11 of the specification, the stabilizer described in the first frame of the rightmost column
゛ is corrected to r stability J.

Claims (1)

[Claims] Sodium percarbonate is coated with a mixture of at least one compound selected from the following groups (I) and (II), respectively. A stabilized sodium percarbonate composition [provided that the selection of compounds from group (I)
and (d)]. (I) (a) Magnesium salt of aromatic hydrocarbon sulfonate, (b) Magnesium sulfate ester salt of ethylene oxide adduct of alkyl-substituted aromatic hydroxy hydrocarbon, (c) Magnesium sulfate ester salt of aliphatic higher alcohol, and (d) Magnesium sulfate ester of the ethylene oxide adduct of the higher alcohol; (II) Sulfate or hydrochloride of an alkali or alkaline earth metal.