JPS61256000A - Rinsing possible detergent and bleaching composition - Google Patents

Abstract

The present invention provides pourable, aqueous detergent and bleach compositions containing a linear alkyl benzene sulphonate, an ethoxylated fatty alcohol and a suspended peroxydicarboxylic acid, e.g. diperoxydodecanedioic acid, the pH of the compositions being set to 3,5 to 4,1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to pourable detergent and bleach aqueous compositions comprising an anionic surfactant, a nonionic surfactant and a suspended organic peroxide. Regarding.

PRIOR ART Compositions of the type described above are described in Dutch Patent No. 278.2.
83 @Disclosed in the specification. Compared to detergent and bleach compositions in various forms, from powders to granules, which are widely used in practice, 9 liquid compositions of the above-mentioned type have significant advantages in terms of preparation and use. Its preparation does not require cost-adding modeling steps, and its liquid form facilitates handling and dispensing, eliminating dust problems. The above-mentioned Dutch patent specification uses the general formula % R-0-0-R (where R and R1 represent organic residues) as a bleaching component.
of suspended organic peroxides. The composition pH described must also be at least 7, with alkaline compositions being preferred. However, these compositions have the disadvantage that they are not stable in practice under normal storage conditions, ie an unacceptable loss of active oxygen occurs. Therefore, these compositions have not been accepted for practical use.

The present invention is intended to overcome this drawback.

(Structure of the Invention) The composition according to the present invention is characterized in that the anionic surfactant is a linear alkylbenzene sulfonate, the nonionic surfactant is an ethoxylated fatty alcohol, and the organic peroxide contains 8 to 13 organic peroxides. is an aliphatic perdiacid (peroxydicarboxylic acid) containing carbon atoms, and the pH of the composition is 3.5 to 4.
．． It is characterized by being set to 1.

Unpublished Larotspa Patent Application No. 0.180.342 describes a liquid aqueous bleaching composition having a pH in the range of 2 to 5 and comprising an alkylbenzene sulfonate, an ethoxylated fatty alcohol, a suspended peracid and an electrolyte. Disclose. Examples IV and V thereof disclose compositions with a pl+ of 4.5. In addition to the fact that the compositions according to the invention are not disclosed in this European patent application, the compositions of the invention exhibit better storage stability compared to the compositions of this European patent application. This will be demonstrated in the examples below.

The composition is storage stable. That is, after two weeks of storage at 40° C. it retains its active oxygen content completely or virtually completely. The pourable properties of the composition can be adjusted according to any particular requirements. For practical purposes, 2
Brookfield rotational viscometer (RV type; 2
The viscosity of the composition measured at 0 rpm) is preferably:
1 to 1200111 Pa, S 1 preferably 50->
500mPa, S.

The linear alkylbenzene sulfonates and ethoxylated fatty alcohols to be included in the composition are materials commonly used in detergent compositions. Preferred linear alkylbenzene sulfonates contain 11 to 1 in the alkyl chain.
It has four carbon atoms. Appropriate ethoxylated fat 5.2 Alcohol: 3-15
Ethoxylated C8 to C18 with an average degree of ethoxylation of
Alcohol is an example. The amount of surfactant to be used can vary depending on the desired pourability (flowability).

The compositions of the present invention generally contain 2 to 20% linear alkylbenzene sulfonate and 5 to 30ii% ethoxylated fatty alcohol, calculated on the weight of the composition.

The bleaching agents used according to the invention are aliphatic peroxydicarboxylic acids containing 8 to 13 carbon atoms. The term peroxydicarboxylic acid herein includes both monoperoxydicarboxylic acids and diperoxydicarboxylic acids. Mixtures of these peracids or combinations of peracids of different chain lengths may also be used. It is preferred that the peroxydicarboxylic acid used consists essentially essentially of diperoxydicarboxylic acid. Examples of diperoxydicarboxylic acids according to the invention include 1,12-diperoxide dodecanoic acid and 1,13
-diperoxytridecanedioic acid. In particular, 1
, 12-diperoxide dodecanoic acid (hereinafter referred to as DPDA)
) is preferred. The base of peroxydicarboxylic acids to be used in the composition according to the invention will generally be from 0.1 to 4%, preferably from 0.1 to 3%, calculated on the weight 1 of the composition. % of active oxygen. In order to prevent settling of the suspended peroxydicarboxylic acid particles, their average size is advantageously between 1 and 100
Selected between microns. Peroxydicarboxylic acid is
It is a compound known per se and can be prepared by reacting a dicarboxylic acid with hydrogen peroxide under the influence of sulfuric acid.

In order to obtain satisfactory storage stability, the quality of the water used in the compositions of the invention is important. Favorable results may be achieved with distilled or deionized water.

It may also be advantageous to include sequestering agents in the composition in order to complex metal ions, the presence of which can cause decomposition of the peroxydicarboxylic acid. Examples of sequestering agents, which must not be susceptible to the oxidizing effects of peracids, include dipicolinic acid, hydroxyethylidene diphosphonic acid, alkali metal pyrophosphates and phosphonic acids. The amount of sequestering agent that can be used in the composition is generally 0 to 1% by weight, preferably 0.01 to 1% by weight, based on the weight of the composition.
It is in the range of % weight.

The weight of the composition is extremely high. It is 3°5~4
．． Must be set to 1. pH higher than 4.1
In this case, the storage stability of the obtained composition is low. At a pt+ lower than 3.5, the composition obtained is not very suitable for cleaning and bleaching purposes, for example because the pH of the wash liquor diluted with water in a washing machine is too low.

Although the composition exhibits a slight acidity when diluted with water, it can be used very effectively in handling soiled laundry. This is surprising in view of the fact that it has been generally thought that neutral or alkaline conditions are necessary for the above purpose.

The composition may further include various commonly used additives. Examples of such additives include anti-staining agents, fluorescent and optical brighteners or brighteners, fragrances and hydrotopic substances. The choice will, of course, depend on the desired properties of the composition and compatibility with other ingredients. In this connection, due to the oxidizing effect of peroxylbonic acid, some additives such as enzymes and certain oxidation-prone brighteners or brighteners cannot be included as such in the composition. However, such materials can be pre-applied with a suitable coating, which can be, for example, in the form of a solid detergent agent that dissolves during the washing step. After that, its addition to the composition is no longer a problem.

The composition comprises an acidified (p]1 about 2) of anionic surfactant, nonionic surfactant and optional other ingredients.
It can be easily prepared by adding the finely divided peroxydicarboxylic acid to an aqueous mixture under stirring and then adjusting the pH of the resulting composition to the desired pH, for example with sodium hydroxide.

The following examples illustrate the invention.

All percentage values in the examples are weight percentages.

EXAMPLE 1 Three compositions according to the invention were tested for active oxygen loss during storage. The table below shows the percentages of the components of the compositions and related properties and test results. The table also shows the test results of a comparative test (composition A) carried out on a composition according to example 4 of NL 276,283.

Test results show that the composition of the invention exhibits satisfactory storage stability at 40'C. At this temperature, prior art composition A completely decomposed, which was also accompanied by severe foam formation. From the test results it is clear that composition A exhibits poor storage stability even at 32°C.

A number of additives were added to several compositions corresponding to Composition 3, after which storage stability was determined as described above. The following additives were used in the amounts indicated in parentheses.

After one month of storage at 40° C., these compositions exhibited a total of only a few > percent active oxygen loss.

Example 2 120d of Composition 3 of Example 1 was used to remove stains and dirt spots from household laundry.
y 5pots) under practical conditions. Comparative tests were conducted using recommended amounts of two commercially available compositions (hereinafter referred to as Compositions B and C).

Composition B is a liquid surfactant concentrate containing about 37% water, about 40% surfactant and also other substances such as enzymes and optical pre-inners.

120d of this composition was used. Composition C is about 14%
surfactant, about 19% polyphosphate, about 15% sodium aluminum silicate, about 23% sodium sulfate, about 9% sodium perborate 4H20,
A powder cleaning and bleaching agent containing about 4% detraacetylethylenediamine and also enzymes and additives. 131d of this composition was used.

For each test, a total of 216 articles, including towels, sheets, pillowcases, and underwear, were washed in an AEG-Turnamat washer using a 9°GH water flow. The maximum wash temperature was 62°C, the total wash time (including heating) was 59 minutes, and the amount of water was 19.11. Following the washing process, the laundry is placed in a 5x17. l! Rinse with cold water and dry. Next, the laundry was evaluated by a panel by dividing the basic towels, sheets, and pillowcases into four equal parts and counting the number of clean pieces. Since both sides were evaluated, a perfectly clean article would receive a score of 8. The underwear was compared to perfectly clean underwear. Perfectly clean underwear has a rating of 8, while perfectly clean underwear has a rating between 0 and 8.

For each of the three compositions tested, the scores of the 12 tests were averaged. The composition of the present invention has a rating of 6.8,
Composition B was 6.5 and Composition C was 6.9. These results show that the effectiveness of the composition according to the invention is excellent.

The above test was repeated at a maximum wash temperature of 40°C with similar evaluations.

Example 3 In this example, the composition of the present invention was compared with the composition of European Patent Application Box 0.160.342 for storage stability. A composition was prepared containing:

100g sodium dodecylbenzenesulfonate (8
5%, the remainder being substantially acidified from sodium sulfate and some sodium chloride), ethoxylation of ioog (7°5EO) C12-C14
Fatty alcohol, 5g Dequest 2010 (as above), 243g
DPDA (aqueous paste with active oxygen content of 5.1%), ゛557 g of water.

This composition was divided into several parts, each of which was set at a different pH. The storage stability of the obtained composition was 1.3 and 4 at 40°C.
It was determined by measuring the percentage of active oxygen remaining after a week of storage. I will show the results below.

The results in the table are: European Patent Application Box 0.160,342
This clearly shows the better storage stability of the composition of the invention compared to the composition of No.

Applicant Niakshi Namrose Fuen Note Shap

Claims (1)

Claims: 1. Pourable detergent and bleach aqueous compositions comprising an anionic surfactant, a nonionic surfactant, and a suspended organic peroxide, wherein the anionic surfactant is linear the nonionic surfactant is an ethoxylated fatty alcohol, the organic peroxide is an aliphatic peroxydicarboxylic acid containing from 8 to 13 carbon atoms, and the pH of the composition is 3. 5 to 4.1. 2. The amount of linear alkylbenzene sulfonate is 2-20% by weight and the amount of ethoxylated fatty alcohol is 5-30% by weight, calculated based on the weight of the composition;
A composition according to claim 1, wherein the amount of peroxydicarboxylic acid is such that the composition contains from 0.1 to 4% by weight of active oxygen. 3. The composition according to claim 1 or 2, wherein the peroxydicarboxylic acid is 1,12-diperoxidedodecanniic acid.