JPS6031879B2 - Activator for per-compounds - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to activators for inorganic and organic peroxides, particularly hydrogen peroxide, urea and dihydrogen.

Q-acyloxy N,N as an adduct of hydrogen peroxide with organic compounds such as hexylamine, and as an activator for inorganic persalts such as persylates, percarbonates and perphosphates.
'-Polyacylmalosamide. The action of an aqueous solution of perc-pound as an oxidizing agent and a bleaching agent is 7000 or more, preferably 80 to 10 pp0.
Valid only at temperatures of

The prior art discloses several compounds that act as percompound activators.

That is, its action is to obtain a more rapid oxidizing or bleaching action than is normally seen, or to achieve said oxidizing or bleaching action at a milder temperature than would otherwise be required for use. All these compounds are characterized in that they have one or more perhydrolable functional groups. Several activator compounds have begun to be commercially developed in the bleaching field.

The literature on this subject describes poly-N-acetylated heterocyclic hydantoins, glycolurils (ie acetylenureas), benzimidazoles and diketopiverazines. However, this development was not continued due to the serious drawback that these compounds are unstable to ambient moisture and spontaneously hydrolyze and thus rapidly lose their active agent properties. Furthermore, these compounds require special care when stored, handled, or added to other ingredients, such as those used in conventional compositions of detergent powders. Various solutions have been proposed to overcome this drawback, such as outer packaging, separate packaging, addition of desiccants, etc., but without satisfactory results. This is because either there are industrial problems in practical implementation or the cost of the active substance is quite high. There is therefore a need in industry to obtain active agents which can be used in a solid state which is stable for long periods of time under normal storage and packaging conditions.

The present invention provides Q-acyloxy ,N'
- A percompound activator comprising polyacylmalonamide is provided.

Examples of Q-acyloxy-N,N'-polyacylmalonamide constituting the activator used in the percompound of the present invention include Q-acetoxyQ-methyl-N,N'-diacetylmalonamide, Q-propionoxy-Q-ethyl-N ，
Examples include N'-dipropionylmalonamide and Q-acetoxyQ-methyl-N,N'-dipropionylmalonamide.

A particularly advantageous method of using the activator according to the invention is to add it to the percompound in a proportion of about 0.33 mol per mole of percompound to be activated.

However, if desired, it is possible to operate with an insufficient or excess amount of activator, with the molar ratio of activator to percompound preferably within the range from 0.1 to 10. The activators according to the invention are useful because the percompounds have oxidizing or bleaching effects, such as bleaching of textile fibers, oils, greases and waxes, hair and skin, treatments in cosmetology, passivation of metal surfaces, refining,
It can be used in all cases where disinfection or sterilization techniques are used.

The activators of the invention when added to percompounds or to compositions containing one or more percompounds, such as detergent powders, are capable of obtaining a rapid bleaching or oxidizing effect at a given temperature; They can also obtain the same bleaching effect when operated at low temperatures.

For example, when sodium pershelate is present in detergent powder soot, the activator of the present invention has a bleaching effect that is almost as good as that obtained in the absence of the activator even at temperatures of 30 to 50°C, at temperatures as high as 80°C. The same degree of bleaching action can be obtained.

The present invention will be explained below with reference to Examples, but is not limited thereto.

Examples 1 to 3 In one of the compartments of an AHIBA water bath flooded to a temperature of 40:00, five doses of detergent powder having the following composition and one dose of sodium pershelate tetrahydrate were added per bath. 250 ml of aqueous solution was introduced in an amount of 1.7 m/cm.

Detergent powder composition: Ingredients Weight (
%)Na2Si03
5.34Na2S04
7.25Na2C03
2.65Na2HP04
0.96Na4P
207 3.99
N is also P30.

30.41NaP0
3 11.92Q
O 18.9 Surfactant 14 Total blue pigment 1
Amount required to make 0% by weight
100 other compartments were charged to the same solution with the active agent to be tested added at a concentration of 1/2.

Each compartment was then filled with a piece of standard wine-colored "EMPA" cotton fabric from Saint-Gall Laboratories, Switzerland. After washing for 15 minutes, the cotton fabric was laundered under cold running water and then left at room temperature. Dry.

Whiteness index before and after washing (manufactured by Karl Ice Co., Ltd., EL
REPHq type spectrophotometer M. 6 filters) is subtracted from the highest initial whiteness index of 100,
The bleaching power of the mystery product was defined as the percentage divided by the number of samples.

Whiteness Index Difference Bleaching Power (%) = 100 - Initial Whiteness Index x 100 The results of the test are shown in the following table.

Examples 4-6 The same conditions as in the previous examples were employed, except that instead of 40 qC, the tests were carried out at a wash temperature of 2 qC.

Claims (1)

[Claims] 1 The following general formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [In the formula, R^1, R^2, R^3, R^4, R^5 and R^6 may be the same which may be different and each represents an alkyl group having 1 to 3 carbon atoms. 2. The activator according to claim 1, which is used for hydrogen peroxide and its adjunct compounds.