FR2564105A1 - Liquid detergent composition and process for its preparation - Google Patents

Abstract

Liquid detergent compositions for washing solid surfaces comprising: a) at least one fatty acid of tall oil, b) a nonionic surfactant, advantageously ethoxylated nonyl phenol, c) an alcohol, preferably ethyl alcohol, d) at least one terpene derivative, e) terpineol, f) a mixture of inorganic salts, such as alkali metal tripolyphosphate, alkali metal silicate, alkali metal hydroxide or others, g) an antioxidising agent, h) if desired, at least one dye and/or another fragrance or fragrance intensifier, and i) water, and having a pH of approximately 10.5. These compositions constitute a product which does not attack the skin.

Description

LIQUID DETERGENT COMPOSITION AND PROCESS FOR ITS PREPARATION
The present invention relates to liquid detergent compositions, and more particularly to liquid detergent compositions for washing solid surfaces.

 Liquid detergent compositions are already known, which aim to supplant powder detergent formulations, either for specific uses such as washing clothes or washing dishes, or for multiple uses.

 Among these, a liquid composition suitable for cleaning all solid surfaces is known and comprises saponified fatty acids, nonionic detergents, terpineol, ethyl alcohol, an alkaline mineral filler, as well as advantageously a dye and a perfume, and water. In the known composition of this type, the saponified fatty acids represent approximately 5% by weight relative to the total weight of the composition; non-ionic detergents are used in the composition at about 1.5-2%, ethyl alcohol at about 3%, terpineol at about 5%, and water at about 'about 80%. The pH of such a composition is 13, which is too alkaline for the product to be harmless to the hands of users.

 There was therefore a need for washing compositions having properties at least equivalent to those of the above composition and, on the other hand, having a less alkaline pH.

 One would have thought that it was enough to incorporate an appropriate pH buffer in the aforementioned known compositions to achieve the desired objective. Such a solution, which would have been based on the normal knowledge of a person skilled in the art, proved to be inappropriate and led to an unstable formulation, having an inadequate viscosity and no longer being stored properly.

It has now been found, unexpectedly, that the abovementioned objective, as well as others which will emerge from the remainder of the present description, can be achieved by means of a combination combining synergistically, for the purposes of washing all solid surfaces.
a) at least one tall oil fatty acid,
b) a nonionic surfactant, advantageously nonyl
ethoxylated phenol,
c) an alcohol, preferably ethyl alcohol,
d) at least one terpene derivative,
e) terpineol,
f) a mixture of mineral salts, such as tripolyphosphate
alkali metal, alkali metal silicate, hy
alkali metal hydroxide, or the like,
g) an antioxidant,
h) if desired, at least one dye and / or another per
smoke or perfume enhancer, and
i) water, and arranged to have a pH of about 10.5.

 The invention therefore has for first object a liquid detergent composition. for washing solid surfaces, comprising any technically possible combination of components a) to i) above and having a pH of approximately 10.5.

 The invention also relates to a composition as defined above and having a viscosity of approximately 85 ^ 15 centistokes.

To achieve the best results sought, this formulation should be optimized. A particularly preferred composition has been found to be that which comprises the following constituents or their equivalents, the proportions indicated being by weight relative to the weight of the total composition - Tall oil fatty acids (at 2% resin acids) 4.5% - Nonox phenol ethoxylated (at 9-10 EO) --------------- 1.7% - Ethyl alcohol ------------- --------------------- 2.9% - Terpene derivatives ---------------------- --------- 0.2% - Coloring solution ------------------------------- 0.05 % - Terpineol ----------------------------------------- 5,125% - Sodium tripolyphosphate ------------------------ 1.3% - Sodium silicate (SiO2: Na2O = 3.35) ------- 2, 03% - Sodium hydroxide ------------------------------- 0.50% - Sodium chloride ----- --------------------------- 0.70% - Antioxidant ----------------- ---------------------- 1.00% - Water ---------------------- ------------------ 79.995% 100.00%
According to a very particularly preferred embodiment of the composition, it is a two-component formulation, comprising
- on the one hand an organic mixture essentially composed
tall oil fatty acids, ethoxylated nonyl phenol
ethyl alcohol, terpene derivatives, solution
coloring if desired, and terpineol, and
- on the other hand, an aqueous mixture essentially composed of
sodium tripolyphosphate, sodium silicate,
sodium hydroxide and water, and the ready-to-use composition consists of the combination of these two mixtures with each other, with the addition of an antioxidant and sodium chloride.

 Advantageously, the above-mentioned aqueous mixture may be an aqueous mixture concentrated in mineral salts and the ready-to-use composition is then produced by adding the organic mixture, the concentrated aqueous mixture, an antioxidant and chloride to the missing water. sodium.

 This two-component formulation allows the production of a composition according to the invention from two separate, stable, storable and transportable mixtures.

In its concentrated version, it also makes it possible to reduce the weight of material transported, most of the water required being in this case only added at the stage of producing the final ready-to-use composition.

 In the composition according to the invention, whatever the variant considered, an appropriate balance must be observed between the proportions of the various components. These proportions may correspond approximately to those of the optimal formulation indicated above, but they may also be different and correspond to other equilibria, which a person skilled in the art is able to detect by means of simple routine tests and methods. 'iterative investigation, for which he must simply use in variable proportions the components according to the invention, or their equivalents.

 In general, it can be said that the proportions of the various components vary symmetrically with the proportion of water.

 The main constituents of the compositions are fatty acids and terpineol.

The components of the organic solvent system are
ethyl alcohol, or any other equivalent alcohol
slow
a non-ionic detergent, which also represents
a wetting agent, such as ethoxylated alcohols
or preferably ethoxylated nonyl phenol.

 The dyes which it is possible to incorporate as an option in these compositions. must be able to be dissolved in terpineol.

 Sodium tripolyphosphate, which acts as a dispersing agent, can be replaced by sodium carbonate or sulfate; he is. however preferred to these.

 The assembly consisting of sodium silicate and sodium hydroxide can be replaced by sodium metasilicate, which however has the disadvantage of being more expensive and above all of being less practical since it is a solid powder. .

 The respective proportions of silicate and hydroxide are linked together.

 Salt (sodium chloride) acts as a viscosity regulator. It can be substituted with another viscosity regulating agent, but with the consequence that this would induce a modification of the pH and would consequently cause the balance of the composition ready to be viscosified to be revised.

 The antioxidant prevents the rancidity of tall oil fatty acids: in fact, the soaps obtained with these fatty acids are only stable at high pH values and rancidity can occur at a pH of only about 10.5.

 Water, which constitutes the major solvent for these compositions, can be tap water. However, it should not be too hard and we therefore prefer softened or deionized water.

 The invention also relates to a process for the preparation of the compositions as described above, according to which the above-mentioned organic mixture and aqueous mixture are produced separately, they are combined with each other, as well as with a antioxidant and sodium chloride, the saponification reaction is allowed to develop at room temperature, the pH is adjusted to a value of about 10.5 by adding an appropriate amount of sodium hydroxide and then the viscosity of the product is adjusted obtained, if necessary, by adding thereto a supplement of sodium chloride, in practice in small quantities, advantageously so as to bring the viscosity of the composition to approximately 85 t 15 centistokes.

Preferably, the aqueous mixture is prepared as described above by incorporating into it a proportion of the sodium hydroxide component slightly lower than the stoichiometric proportion.
As a variant, an aqueous mixture concentrated in mineral salts is used and the above-mentioned organic mixture and the concentrated aqueous mixture as described above, as well as the antioxidant and the chloride, are added simultaneously, in the appropriate amount of complementary water. of sodium, and the process is continued as indicated above.

 The compositions according to the invention are useful for cleaning solid surfaces such as in particular floors. washable walls, worktops, sinks and sanitary fixtures, among others. In practice, they are applied either in the pure state. either diluted in water, on the surfaces to be cleaned, they are spread over these surfaces by rubbing so as to facilitate the removal of encrusted dirt and rinsed, if necessary.

 The following example illustrates the present invention; it does not limit its scope. Unless otherwise indicated, parts and percentages are by weight. The viscosities were determined using a Brookfield viscometer.

EXAMPLE
To make a liquid detergent cleaning composition according to the invention corresponding to the following preferred composition - Tall oil fatty acids (2% resin acids) 4.5% - Ethyl nonox phenol (9-10 EO) - ------------- 1.7% - Ethyl alcohol ------------------------------ ---- 2.9% - Terpene derivatives ------------------------------- 0.2% - Coloring solution ( blue + yellow) ----------------- 0.05% - Bi-rectified terpineol (more than 98% in ter alcohol
penic) ------------------------------------------ 5,125% - Sodium tripolyphosphate ------------------------ 1.3% - Sodium silicate (SiO2: Na2O = 3.35) ------- 2, 03% - Sodium hydroxide ------------------------------- 0.50% - Sodium chloride ----- --------------------------- 0.70 - Antioxidant ------------------ --------------------- 1.00% - Water ----------------------- ---------------- 79.995% loo, ao% the following procedure was followed 1) production of the organic mixture
The following constituents were mixed together - Tall oil fatty acids 4.5 parts 31.09% - Ethyl nonox phenol 1.7 parts 11.74% - Ethyl alcohol 2.9 parts 20.03% - Terpene derivatives 0, 2 part le, 38% - Coloring solution 0.05 part 0.35% - Terpineol 5,125 parts 35.41%
14.475 parts 100.00% 2) Preparation of an aqueous mixture concentrated in mineral salts
The following constituents were mixed together - Sodium tripolyphosphate 1.3 parts 9.09% - Sodium silicate *) 2.03 parts 14.19% - Sodium hydroxide 0.5 parts 3.50% - Water 10.476 parts 73.22%
14.306 parts 100.00% *) the liquid sodium silicate of ratio SiO2: Na2O = 3.35 is transformed into metasilicate of ratio 1.

3) Neutralization of fatty acids
Was added simultaneously in 69.519 parts of water - 14.475 parts of the organic mixture according to 1) - 14.306 parts of the aqueous mixture according to 2) - 1 part of antioxidant, and - 0.4 part of sodium chloride.

The reaction was allowed to develop at room temperature for about 5 minutes.

In total, the product thus constituted represented 99.70 parts by weight.

4) pH adjustment
The pH was adjusted to 10.5 by adding to the mixture according to 3) successive small amounts of sodium hydroxide, allowing the saponification reaction the time necessary for its development, until the desired pH is obtained. .

5) Adjusting the viscosity
The viscosity of the mixture obtained according to 4) can vary in significant proportions under the effect of even small variations in the proportions of the constituents.

It is therefore recommended to adjust, if necessary, the viscosity of the final product by adding small amounts of sodium chloride to it. In the present case, an addition of 0.3 part of sodium chloride to 99.7 parts of the mixture obtained according to 4) made it possible to adjust the viscosity to 85 t 15 centistokes.

Claims (7)

R E V E N D I C A T I O N -S  1. Liquid detergent composition for washing solid surfaces, characterized in that it comprises  a) at least one tall oil fatty acid,  b) a nonionic surfactant, advantageously nonyl  ethoxylated phenol,  c) alcohol. preferably ethyl alcohol,  d) at least one terpene derivative,  e) terpineol,  f) a mixture of mineral salts, such as tripolyphosphate  alkali metal, alkali metal silicate, hy  alkali metal hydroxide, or the like,  g) an antioxidant,  h) if desired, at least one dye and / or another per  smoke or perfume enhancer, and  i) water, and has a pH of about 10.5.  2. Composition according to claim 1, characterized  in that it has a viscosity of about 85 * 15  centistokes.  3. Composition according to claim 1, characterized in that it comprises the following constituents or their equivalents, the proportions indicated being by weight relative to the weight of the total composition - Tall oil fatty acids (at 2% of resin acids) 4.5% - Nonyl phenol ethoxylated (at 9-10 EO) --------------- 1.7% - Ethyl alcohol ---------- ------------------------ 2.9% - Terpene derivatives ------------------- ------------ 0.2% - Coloring solution ------------------------------- - 0.05 - Terpineol ------------------------------------------ 5.125% - Sodium tripolyphosphate ------------------------ 1.3% - Sodium silicate (Si03 :: Na2O = 3.35) ---- --- 2.03% - Sodium hydroxide ------------------------------- 0.50,% - Chloride sodium -------------------------------- 0.70 X - Antioxidant ----------- ---------------------------- 1.00% - Water ---------------- -------------------------------- 7.9.995%  4. Composition according to claim 1, characterized in that it constitutes a two-component formulation comprising  - on the one hand, an organic mixture essentially composed  tall oil fatty acids, ethoxylated nonyl phenol,  ethyl alcohol, terpene derivatives, a  coloring solution if desired, and terpineol, and  - on the other hand, an aqueous mixture essentially composed  sodium tripolyphospate, sodium silicate,  sodium hydroxide and water, and the ready-to-use composition consists of the combination of these two mixtures with each other, with the addition of an antioxidant and sodium chloride.  5. Composition according to claim 4, characterized in that the aqueous mixture is an aqueous mixture concentrated in mineral salts.  6. Process for the preparation of a composition according to claim 4, characterized in that the organic mixture and the aqueous mixture are produced separately, they are combined one with the other, as well as with an antioxidant and sodium chloride, the saponification reaction is allowed to develop at room temperature, the pH is adjusted to a value of about 10.5 by adding an appropriate amount of sodium hydroxide and then the viscosity of the product obtained is adjusted if necessary , by adding a supplement of sodium chloride, advantageously so as to bring the viscosity of the composition to approximately 85 t 15 centistokes.  7. Method according to claim 6, characterized in that an aqueous mixture concentrated in mineral salts is used and simultaneously added, in the appropriate amount of complementary water, the organic mixture and the concentrated aqueous mixture, as well as antioxidant and sodium chloride.