JPS6060907A - Stabilized sodium percarbonate composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition having superior stability by coating sodium percarbonate with a specified compound. CONSTITUTION:An aqueous soln. contg. 1-10wt% one or more kinds of Mg compounds is spread over sodium percarbonate, and they are mixed and dried to obtain a chemically stable sodium percarbonate composition. This composition exerts no unfavorable influence on the washing power and bleaching power of a detergent, and it does not cause ignition and abnormal decomposition. Said Mg compounds are selected among the Mg salts of aromatic hydrocarbon sulfonic esters of the adducts of alkyl substituted aromatic hydroxyhydrocarbons to ethylene oxide such as magnesium polyoxyethylenelauryl (3EO) sulfate and the Mg salts of the sulfuric esters of aliphatic higher alcohols or the Mg salts of the sulfuric esters of the adducts of aliphatic higher alcohols to ethylene oxide such as the magnesium sulfate of coconut oil and higher alcohol.

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 edge than chlorine-based bleach, but does not cause fading of dyed products, especially dyed fabrics, and does not cause yellowing of chemical fibers. It has the advantage of not introducing any being used.

However, the operating temperature of sodium perborate is as high as 60°C or higher, and water work such as washing and bleaching at home can be carried out at temperatures as high as 40°C.
Due to the Japanese custom of using soda at low temperatures below Celsius, soda percarbonate is preferred and consumed in large quantities due to its low operating temperature.It also has the effect that it does not pollute wastewater and is preferred from the perspective of pollution prevention. I'm letting you do it.

However, soda percarbonate has the drawbacks of poor stability against moisture and instability against detergent buildup.

For this reason, large quantities of bleach-containing detergents are sold and used in Europe and America, but their development has lagged behind in Japan.

Conventionally, inorganic magnesium compounds, such as magnesium sulfate, magnesium chloride, and magnesium charcoal, have been known as stabilizers for hydrogen peroxide, which is a component of sodium percarbonate. The stabilizing effect on

As a result of intensive research, the inventors of the present invention discovered a new stabilizer with high stabilization effect on soda percarbonate,
The invention has been completed.

That is, the present invention combines sodium percarbonate with (A) a magnesium salt of an aromatic hydrocarbon sulfonate, (B) a magnesium sulfate ester of an ethylene oxide adduct of an alkyl group-substituted aromatic hydroxy hydrocarbon, and (C) a higher aliphatic acid. Magnesium sulfate ester salt of alcohol or ester magnesium sulfate salt of ethylene oxide adduct of the higher allul.

The present invention provides a stabilized soda percarbonate composition coated with at least one compound selected from the following.

Examples of the compound (A) include magnesium salts of sulfonic acids such as benzene, toluene, xylene, ethylbenzene, cumene, and naphthalene, or linear or branched alkylbenzenes or naphthalenes whose alkaline salts are known to have surface activity. Magnesium salts of sulfonic acids can be used, but examples of alkyl groups as side chains of hydrocarbons include the above-mentioned akylbenze c1,
It is also preferable to use a C2 alkyl group having an intermediate carbon number in the c18 decimal group, which is often used as a side chain alkyl group in the surfactant, such as a C6 hexyl group.

As the compound (B), those having a carbon number of 06 to C1o as a benzene group as an aromatic ring are preferably used. It can be used. Furthermore, in addition to the above, those in which the aromatic nucleus is substituted with a sulfone group can be used. As polyoxyethylene groups, those having about 2 to 3 oxyethylene units are used as usual.

As the higher alcohol used in the compound (C),
Compounds using any of natural higher alcohols of C6 or higher and made from animal and vegetable oils and fats, synthetic higher alcohols and synthetic secondary alcohols of the oxo method and Ziegler method can be preferably used.

The stabilized sodium percarbonate composition of the present invention has an excellent stabilizing effect, is inexpensive because raw materials are easily available, and coating operations can be easily performed, and can be used with detergents to improve detergency and bleaching power. It does not cause any adverse effects, and is chemically stable despite the use of peroxide, and there is no risk of ignition or abnormal decomposition.

As described above, the stabilized composition of the present invention is stable, has excellent compatibility with builders, has excellent stability, and has excellent bleaching properties, so it can be used with detergents and is an excellent bleach-containing detergent. can be obtained.

In order to obtain the sodium percarbonate stabilized composition of the present invention using the above-mentioned stabilizer, the above-mentioned stabilizer is coated by adding the above-mentioned stabilizer as a powder before or after the drying process of the soda percarbonate. A general mixer is used. Alternatively, a method of spraying or scattering the stabilizer as an aqueous solution or an organic solvent solution onto the sodium percarbonate crystals or granules obtained from the soda percarbonate manufacturing process, mixing and drying is used. Any method may be used as long as it can be uniformly dispersed. Stabilizer: 1 to 1 per soda percarbonate
O is used in an amount of % by weight. Hereinafter, as an example, a production example of the stabilized composition of the present invention and the test results of a stability test of the obtained stabilized composition will be shown.

Examples 1 to 7 After adding and mixing 1 to 10% by weight of the present stabilizer as a methanol solution to 100 g of dried sodium percarbonate crystals, infrared drying was performed to obtain a stabilized sodium percarbonate composition.

Tables 1 and 2 show the results of measuring the stability of the resulting composition against zeolite.

The stability shown in Table 1 is the stability of the obtained sodium percarbonate composition 9.
Synthetic zeolite) Ig was mixed with g, and the temperature was 60°C.
The effective oxygen residual rate was measured by iodometry after being left for 72 hours at a relative humidity of 80%.

Table 2 shows PPC10, a heavy alcohol-based powder detergent (commercial product) containing 10% synthetic zeolite and 3% water.
% detergent and the device was placed at room temperature from April to the end of July, and the change over time in the residual rate of effective oxygen was measured using the same method, and the results obtained are shown.

Table 1 Table 2 Examples 9 to 16 Example 1 except that the present stabilizer was added and mixed as an aqueous solution.
8 to 8 to prepare a sodium percarbonate composition, Example 1
The stability against zeolite was measured under the same conditions as those used to obtain the results in Table 1, and the results in Table 3 were obtained.

Table 3 Examples 17-21 Granular wet soda percarbonate powder with 11% water content obtained by reacting carbonic acid sorter with hydrogen peroxide in an aqueous solution φ and centrifuging 'tfi 4. okg was placed in a stirring mixer, the unstabilized agent was added in the above amount as it was, and after mixing for 5 minutes, it was dried, and the obtained percarbonate sorter composition was prepared according to the results shown in Table 1 of Example 1 The stability against ze+lite was determined under the same conditions as used in the test to obtain I! Ill determined. The results are shown in Table 4.

Table 4 Procedures Amendment Date: October 11, 1982 2, Title of Invention: Stabilized Sodium Percarbonate Composition 3,
Relationship with the case of the person making the amendment Patent applicant name: Japan Synthetic Detergent Co., Ltd. 11 Peroxide Co., Ltd. 4, agent address: 8, 11 Sankyo Building, 2-1-2 Koishikawa, Bunkyo-ku, Tokyo Contents of the amendment ( 1) The statement of the claims shall be corrected as shown in the attached sheet.

(2) The following statement in the specification is corrected as follows.

(3) Lines 2 to 1 from the bottom of page 4 of the specification ``Aromatic ring...''
The description of ``°'' has been corrected to ``a sulfuric ester salt of an ethylene oxide adduct of an aromatic hydroxy compound having a side chain of an alkyl group having 6 to 10 carbon atoms.''

(4) Product 4th line from the bottom of page 7 of the specification) PPC...Blend, and change the description of ``Product'' to 9096 with 10% of the soda percarbonate composition obtained by the above method. I'll correct you.

Claims: ``Sodium percarbonate, (A) aromatic hydrocarbon sulfonic acid magnesium salt, (
B) Magnesium sulfate ester of alkyl-substituted aromatic hydroxyl hydrogen oxide adduct with ethylene oxide, and (C) Sulfuric acid ester of aliphatic higher alcohol) Lt7 gunenum salt, or ethylene oxide +1 (
A stabilized filter (1) characterized in that it is coated with at least one selected compound (1) for magnesium sulfate ester as an additive. Le acid soda composition. ” Procedural Amendment February 3, 1981 Patent Application No. 170079 2, Name of Invention Stabilized Sodium Percarbonate Composition 3, Relationship with Amended Beach Weight Patent Applicant Name Nippon Gosei Detergent Co., Ltd. Nippon Peroxide Co., Ltd. 4, Agent address: 2-1-2 Koishikawa, Bunkyo-ku, Tokyo Specification No. 12
The following statement is inserted next to Table 4 on page 4.

Examples 22-30 After adding and mixing 1 to 10 ml of m-xylene sulfone butymagnesium to dry sodium percarbonate crystals, 5 to 3 oz (outside) of methanol was added dropwise over 3 minutes, and further under reduced pressure. and mixed for 3 minutes.

This was further dried in a dryer at 80 to 90°C for about 20 minutes, and the stability was measured using the same method and under the same conditions as those used to obtain the results in Table 1 of Example 1. , the results shown in Table 5 were obtained.

As shown in the above results in Table 5, according to the method of the present invention, it is possible to obtain sodium percarbonate coated with a stabilizer having sufficient stability even if the amount of methanol used is reduced.

Claims (1)

[Claims] Sodium percarbonate, (A) aromatic hydrocarbon sulfonic acid magnesium salt, (B
) a magnesium sulfate ester of an ethylene oxide adduct of an alkyl-substituted aromatic hydroxy hydrocarbon, and (C) a magnesium salt of a sulfate ester of an aliphatic higher alcohol, or a magnesium sulfate ester of an ethylene oxide adduct of the higher arecol. A stabilized soda percarbonate composition characterized in that it is coated with at least one selected compound.