FR2883478A1 - Compacted solid disinfecting composition, useful preferably for eliminating bacteria, comprises a first layer comprising an oxygenated bleaching agent and a second layer comprising a bleaching activator - Google Patents

Abstract

Compacted solid disinfecting composition, comprises a first layer comprising an oxygenated bleaching agent (30-50 wt.%), preferably hydrates of percarbonate salts and/or hydrates of perborate salts, a second layer comprising a bleaching activator (40-60 wt.%), where the reaction of the oxygenated bleaching agent produces peracetic acid.

Description

The present invention relates to a compacted solid composition

  concentrated disinfectant comprising at least two layers, the first layer comprising at least one bleaching agent, the second layer comprising at least one bleaching activator, in proportions

special.

  In the field of laundry in general, the current trend of lower washing temperatures, particularly following the diversification of fibers, shapes and colors, poses a problem of prophylaxis. Indeed, the bacteria, naturally present and proliferating in the tasks and on the natural fibers, are not necessarily eliminated by the washing, the temperatures used not allowing their suppression.

  In contact with the skin, bacteria can play a pathogenic role in infections, while their catabolism can trigger allergic reactions. In addition, they can be responsible for persistent odors on the laundry. For example, axillary odors caused by the action of Corynebacterium xerosis on sebum and sweat may persist.

  It has already been proposed effective disinfectant compositions based on hypochlorite and sodium chloride, such as bleach for example. However, such compositions, whether used alone or in conjunction with detergents, are particularly corrosive to fibers and textiles in general. Thus, after a few washes, the laundry is degraded and has a particularly low tensile strength to dry traction, which demonstrates its advanced state of wear.

  Likewise, the disinfecting compositions of the prior art, in particular the compositions based on hypochlorite and sodium chloride, are also very harmful with regard to the color fastness of the laundry. For example, in the case of an improper disposal of the laundry during the first rinse, a random phenomenon that can not be avoided with certainty, the strong reaction of the bleach with oxygen bleaching agents may be at the origin an important phenomenon of localized discoloration of the linen or spotting.

  Thus, there remains the need for a composition capable of having a disinfecting action performing at any temperature, and especially at low temperature such as for example at a temperature of about 30 C, which corresponds to a machine wash cycle low standard temperature, better still at 20 C, which corresponds to a machine wash cycle in cold water, and better still at 20 C in 5 minutes which corresponds to the standardized conditions of the European standard of disinfection EN 1276 and would allow a disinfection fast, out of machine, and which moreover respects both the fibers and the colors of the treated linen.

  The present invention aims to remedy this need.

  Indeed, the Applicant has discovered that by specifically combining, within a solid compact composition, in particular proportions and especially in a concentrated manner, on the one hand a particular oxygen bleaching agent and on the other hand a bleach activator such as tetraacetylethylenediamine, it was possible to obtain a particularly effective disinfectant composition, that is to say, meeting the disinfection standards in force, at low temperature, for example at a temperature of 20 C, and this without degrading neither the fibers nor the colors of the treated linen.

  The present invention relates to a solid disinfectant compact composition comprising at least a first layer and at least a second layer, characterized in that: the first layer comprises at least one oxygen bleaching agent chosen from the hydrates of the salts of the percarbonate, the hydrates of the perborate salts and mixtures thereof, the bleaching agent being present in the first layer at a content ranging from 30 to 50% by weight, relative to the total weight of the first layer, the second layer comprises at least one bleach activator, the reaction of which with the oxygen bleaching agent of the first layer is capable of producing peracetic acid, the bleach activator being present in the second layer at a content ranging from 40 to 60%, in weight relative to the total weight of the second layer.

  The composition according to the invention has an excellent disinfecting action, in particular according to the EN 1276 standard, whatever the state of cleanliness of the laundry, for any washing temperature greater than or equal to 20 C, alone or in the presence of a laundry . In particular, the composition according to the invention has a disinfecting activity according to the EN 1276 standard, namely that it is capable of eliminating, at 20 ° C. and in 5 minutes, 99.99% of the bacteria, for the four standard strains of this standard, ie P. aeruginosa, E. hirae, S. aureus and E. coli.

  In the same way, a composition according to the invention in the form of a tablet or a tablet of 30 g is able to eliminate, at 30 C and in 15 minutes, 99.99% of the bacteria, according to the standard EN 1276 in dirt condition, a washing bath of 15 liters.

  In addition, the composition according to the invention respects the integrity of the textile fibers of the treated linen. Even after several washes in the presence of the composition according to the invention, the fabric retains its tensile strength.

  The composition according to the invention also respects the color fastness, even after several washes.

  Other advantages of the present invention will become apparent from the detailed description and examples which follow.

  The composition according to the invention is a compacted solid composition. Thus, the composition according to the invention may be in the form of a tablet, a tablet, a roller, etc. Such a solid composition is particularly convenient to use. It is easy to store, handle and associate during washing, for example in a machine, with any other composition, such as detergents or detergent compositions.

  The composition according to the invention comprises at least two layers, a first layer and a second layer. These two layers are preferably distinct.

  The first layer of the composition according to the invention comprises at least one oxygen bleaching agent chosen from the hydrates of the percarbonate salts, the hydrates of the perborate salts and their mixtures. Preferably, the bleaching agent is chosen from hydrates of sodium salts of percarbonate, hydrates of potassium salts of percarbonate, hydrates of sodium salts of perborate, hydrates of potassium salts of perborate and mixtures thereof. Preferably, the bleaching agent is a hydrated sodium percarbonate, preferably of formula 3Na2CO3.2H2O2. An example of a bleaching agent that is suitable for the present invention is sodium percarbonate hydrate of formula 3Na2CO3.2H2O2 sold under the trade name Oxyper S141 by the company Solvay.

  The bleaching agent is present in the first layer at a content ranging from 30 to 50%, by weight relative to the total weight of the first layer. Preferably, the bleaching agent is present in the first layer at a content of from 35 to 45% by weight, preferably at a level of about 40% by weight, based on the total weight of the first layer.

  Thus, preferably, the bleaching agent is present in the composition at a content ranging from 15 to 35% by weight, preferably ranging from 20 to 30% by weight, and more preferably about 25% by weight. , relative to the total weight of the composition.

  In a preferred embodiment of the invention, the first layer further comprises at least one magnesium silicate. Indeed, the presence of sodium silicate in the first layer makes it possible to stabilize the bleaching agent optimally within this layer. Preferably, the magnesium silicate is present in the composition at a content ranging from 0.1 to 1.5%, by weight, relative to the total weight of the composition.

  In a preferred embodiment of the invention, the first layer further comprises at least one polyethylene glycol having a number of molecules of ethylene oxide ranging from 20 to 300. Preferably, the polyethylene glycol has 90 molecules of ethylene oxide The presence of such a polyethylene glycol in the first layer avoids the seizure phenomenon likely to occur during the pelletization of the composition, due to a high content of bleaching agent in the first layer .

  Preferably, the polyethylene glycol is present in the first layer at a content ranging from 1 to 15% by weight, preferably from 2 to 10% by weight, and more preferably about 5% by weight, relative to to the weight of the first layer.

  The second layer of the composition according to the invention comprises at least one bleach activator whose reaction with the oxygen bleaching agent of the first layer is capable of producing peracetic acid. Preferably, the bleach activator is tetraacetylethylenediamine. An example of tetraacethylethylenediamine suitable for the present invention is the product sold under the trade name TAED by the company Clariant.

  The bleach activator is present in the second layer at a content ranging from 40 to 60%, by weight, relative to the total weight of the second layer. Preferably, the bleach activator is present in the second layer at a content of from 35 to 55% by weight, preferably at a level of about 50% by weight, based on the total weight of the second layer.

  Thus, preferably, the bleach activator is present in the composition at a content ranging from 5 to 25% by weight, preferably ranging from 10 to 20% by weight, and more preferably about 15% by weight. , relative to the total weight of the composition.

  In a preferred embodiment of the invention, the weight ratio of the first layer to the second layer is between 50:50 and 80:20, preferably from 55:45 to 70:30, and more preferably is about 60:40.

  Thus, according to the specific arrangement of the composition of the invention according to two layers, one comprising the bleaching agent, the other comprising the bleach activator, it is possible to obtain a great stability in the time of these assets. Thus, when the composition of the invention, for example in tablet form, is brought into contact with water, it dissolves and the bleaching agent and the bleach activator cooperate to form the disinfectant the composition according to the invention has disinfecting properties.

  Thus, preferably, the bleaching agent and the bleach activator are present in the composition at respective contents, which make it possible to form the disinfecting agent, in particular peracetic acid, in situ, in an amount effective to disinfect the bleaching agent. linen without degrading it.

  Moreover, in order to avoid the appearance of discoloration stains, it is preferable that the composition according to the invention dissolves rapidly, preferably in less than 2 minutes. In this case, the shortened time of disintegration of the two layers makes it possible to rapidly bring about an optimum concentration of peracetic acid relative to the oxygen bleaching agent and bleach activator dosage.

  Thus, preferably, the composition further comprises at least one effervescent system. Preferably, this effervescent system comprises at least one acid, preferably at least one water-soluble organic acid, and at least one carbonate base. The water-soluble organic acid is preferably selected from adipic acid, malic acid, citric acid and mixtures thereof. Preferably, the carbonate base is an alkaline carbonate or hydrogencarbonate and more preferably the carbonate base is sodium hydrogen carbonate.

  Preferably, the effervescent system is present in the composition at a content ranging from 1 to 55% by weight, preferably from 15 to 50%, by weight, more preferably from 30 to 45%, by weight, relative to total weight of the composition.

  The composition according to the invention may also comprise a disintegrating agent, for example capable of reacting immediately on contact with water to cause, by swelling, the rapid disintegration, preferably in less than two minutes, of the composition. Preferably, the disintegrating agent comprises at least one crosslinked polymer chosen from polyacrylate derivatives, cellulose derivatives, crystalline or amorphous, and mixtures thereof. More preferably, the disintegrating agent is crosslinked carboxymethyl cellulose.

  Preferably, the disintegrating agent is present in the composition at a content ranging from 1 to 10% by weight, preferably from 2 to 8% by weight, more preferably from 3 to 5%, by weight, relative to total weight of the composition.

  In a preferred embodiment of the invention, the first layer comprises at least one microcrystalline cellulose and the second layer comprises at least one amorphous cellulose. Such an embodiment allows a particularly short disintegration time and therefore optimum efficiency Preferably, the microcrystalline cellulose is present in the first layer at a content ranging from 3 to 5% by weight, preferably at a content of about 4% by weight, based on the total weight of the first layer, and the amorphous cellulose is present in the second layer at a content ranging from 3 to 5% by weight, preferably at a content of about 4% by weight , relative to the total weight of the second layer.

  Such a combination of the microcrystalline cellulose in the first layer and the amorphous cellulose in the second layer makes it possible to obtain an optimized disintegration of the solid composition according to the invention.

  In such an embodiment of the invention, a solid composition according to the invention of 30 g dissolves in water at 20 ° C. in less than 90 seconds.

  According to a preferred embodiment of the invention, the solid composition according to the invention further comprises at least one silver salt, preferably a silver chloride. Such a composition allows a deposit of silver salt on the laundry and thus prolongs the immediate disinfecting action of a residual action. Preferably, the silver salt is present in the composition, at a content ranging from 0.1 to 20% by weight, preferably ranging from 0.5 to 10%, by weight, relative to the total weight of the composition. composition.

  The compositions according to the invention may furthermore comprise additional compounds chosen from binding agents, anionic surfactants, cationic surfactants, nonionic surfactants, complexing systems, dispersants, enzymes, dyes, perfumes, and their mixtures.

  The compositions according to the invention may furthermore comprise other additional layers, intermediate or otherwise, in addition to the two layers described above.

  The compositions according to the invention are generally prepared in the form of pellets, tablets, rollers, according to conventional methods for pelletizing solid bilayer or multilayer compositions. Generally, for each layer, the various compounds are prepared in the form of powders and are then mixed together. The pellet is then prepared in a pelletizer or a rotary press, for example bilayer.

  In a preferred embodiment of the invention, the solid composition according to the invention is in the form of a pellet whose mass ranges from 20 to 40 g, preferably 25 to 35 g and more preferably is about 30 g.

  The present invention will now be illustrated by the following examples.

EXAMPLE 1

  A composition according to the invention of the following formulation was prepared (the amounts are given as a percentage of weight, relative to the total weight of the composition): Composition 1: Layer A (first layer): anhydrous citric acid sold by Jung Bunz Laue 12.0% microcrystalline cellulose sold under the trade name Vivapur 200 by the company JRS-sodium bicarbonate sold by the company Solvay-magnesium silicate sold under the trade name Macrosorb by the company Ineos-sodium percarbonate sodium hydrate of formula 3Na2CO3 .2H2O2 sold under the trade name Oxyper 5141 by the company Solvay - polyethylene glycol with 90 ethylene oxide molecules (PEG 4000) sold by the company Clariant Layer B (second layer): granular amorphous cellulose sold under the name commercial Arbocel by the company JRS - sodium bicarbonate sold by the company Solvay - silicate l Amellaire sold by Clariant - tetraacetylethylenediamine sold under the trade name TAED by Clariant 2.4% 18.0% 0.6% 24.0% 3.0% 2, 4% 14.0% 3.6% 20.0% AinsJ, the layer A represents 60% by weight relative to the total weight of the composition 1 and the layer B represents 40% by weight relative to the total weight of the composition 1. The weight ratio of the first layer to the second layer is 60:40.

  This composition was prepared in pellet form as follows: for each of the two layers, the different compounds were prepared. in powder form and then mixed together. The pellet was then prepared on a rotary press, bilayer, comprising 29 compression stations, at a turret speed of 11 revolutions per minute. The compressive stress for compaction of layer A was 2 tons and the compressive stress for compaction of layer B was 10 tons.

  About 600 kg of the powder mixture corresponding to layer A and about 400 kg of the powder mixture corresponding to layer B yielded about 33,000 pellets of about 30 g each.

  Such a pellet according to the invention of 30 g dissolves in a 1 liter of water at about 20 ° C in about 1 minute and 30 seconds.

  Moreover, it has been verified that such a tablet has a disinfecting activity according to EN 1276, namely that such a tablet is able to eliminate, at 20 C and in 5 minutes, 99.99% of bacteria, for the four standard strains of this standard, ie P. aeruginosa, E. hirae, S. aureus and E. coll. This efficiency is obtained under the interfering conditions of dirt defined by the standard, for a concentration equivalent to a pellet dissolved in 15 liters of water, ie the volume of a washing bath machine.

  Likewise, it has been verified that such a pellet removes 99.99% of the bacteria in 15 minutes at 30 C, according to the test and the soil conditions described in standard 1276, for a 15 liter wash bath. This efficiency is obtained under the interfering conditions of dirt defined by the standard, for a concentration equivalent to a pellet dissolved in 15 liters of water, ie the volume of a washing bath machine.

  In addition, such a tablet does not degrade the fibers or the colors of the laundry, and that it is used alone or in combination with a standard type of laundry with bleaching agents or with a specific lye color.

EXAMPLE 2

  A composition according to the invention of the following formulation was prepared (the amounts are given as a percentage by weight, relative to the total weight of the composition): Composition 2: Layer A (first layer): anhydrous citric acid sold by Jung Bunz Laue-microcrystalline cellulose sold under the trade name Vivapur 200 by the company JRS - sodium bicarbonate sold by the company Solvay 16, 0% - silver chloride sold by the company Fluka 2.0% -Magnesium silicate sold under the Macrosorb by the company Ineos - Sodium percarbonate hydrate of formula 3Na2CO3.2H2O2 sold under the trade name Oxyper S141 by the company Solvay 12.0% 2.4% 0.6% 24.0% - polyethylene glycol with 90 molecules of ethylene oxide (PEG 4000) sold by the company Clariant Layer B (second layer): granular amorphous cellulose sold under the trade name Arbocel by the company JRS -Sodium bicarbonate sold by the company Solvay 12.0% - silver chloride sold by the company Fluka 2.0% - lamellar silicate sold by the company Clariant 3.6% tetraacetylethylenediamine sold under the trade name TAED by the company Thus, the layer A represents 60% by weight relative to the total weight of the composition 2 and the layer B represents 40% by weight relative to the total weight of the composition 2. The weight ratio of the first layer at the second layer is therefore 60:40.

  This composition was prepared in pellet form as follows: for each of the two layers, the various compounds were prepared in the form of powder and then mixed together. The pellet was then prepared on a rotary press, bilayer, comprising 29 compression stations, at a turret speed of 11 revolutions per minute. The compressive stress, allowing the compaction of the layer A was 2 tons and 3.0% 2.4% the compressive stress allowing the compaction of the layer B was of 10 tons About 600 kg of the mixture of powders corresponding to the layer A and about 400 kg of the powder mixture corresponding to layer B provided about 33,000 pellets of about 30 g each.

  Such a pellet according to the invention of 30 g dissolves in a 1 liter of water at approximately 20 ° C. in approximately 1 minute and 45 seconds.

Claims (28)

  1. A solid disinfectant compact composition comprising at least a first layer and at least a second layer, characterized in that: the first layer comprises at least one oxygen bleaching agent chosen from the hydrates of the salts of the percarbonate, the hydrates of the salts perborate and mixtures thereof, the bleaching agent being present in the first layer at a content ranging from 30 to 50% by weight, relative to the total weight of the first layer, the second layer comprises at least one bleach activator , whose reaction with the oxygen bleaching agent of the first layer is capable of producing peracetic acid, the bleach activator being present in the second layer at a content ranging from 40 to 60%, by weight relative to to the total weight of the second layer.   2. Composition according to claim 1, characterized in that the bleach activator is tetraacetylethylenediamine.   3. Composition according to claim 1 or 2, characterized in that the bleaching agent is present in the first layer at a content ranging from 35 to 45% by weight, preferably at a content of about 40% by weight, relative to the total weight of the first layer.   4. Composition according to any one of claims 1 to 3, characterized in that the bleaching agent is present in the composition at a content ranging from 15 to 35% by weight, preferably ranging from 20 to 30% by weight. weight, and more preferably about 25% by weight, based on the total weight of the composition.   5. Composition according to any one of the preceding claims, characterized in that the bleach activator is present in the second layer at a content ranging from 35 to 55% by weight, preferably at a content of approximately 50% by weight. weight, relative to the total weight of the second layer.   6. Composition according to any one of the preceding claims, characterized in that the bleach activator is present in the composition at a content ranging from 5 to 25%, by weight, preferably ranging from 10 to 20% by weight, and more preferably about 15% by weight, based on the total weight of the composition.   7. Composition according to any one of the preceding claims, characterized in that the weight ratio of the first layer to the second layer is between 50:50 and 80:20, preferably from 55:45 to 70:30, and more preferably is about 60:40.   8. Composition according to any one of the preceding claims, characterized in that the bleaching agent is chosen from hydrates of sodium salts of percarbonate, hydrates of potassium salts of percarbonate, hydrates of sodium salts of perborate , the hydrates of potassium salts of perborate and mixtures thereof.   9. Composition according to the preceding claim, characterized in that the bleaching agent is a sodium percarbonate hydrate, preferably of formula 3Na2CO3.2H2O2.   10. Composition according to any one of the preceding claims, characterized in that the first layer further comprises at least one magnesium silicate.   11. Composition according to the preceding claim, characterized in that the magnesium silicate is present in the composition at a content ranging from 0.1 to 1.5%, by weight, relative to the total weight of the composition.   12. Composition according to any one of the preceding claims, characterized in that it further comprises at least one effervescent system.   13. Composition according to the preceding claim, characterized in that the effervescent system is present in the composition at a content ranging from 1 to 55% by weight, preferably from 15 to 50%, by weight, more preferably from 30 to 45%, by weight, relative to the total weight of the composition.   14. Composition according to claim 12 or 13, characterized in that the effervescent system comprises at least one acid, preferably at least one water-soluble organic acid, and at least one carbonated base.   15. Composition according to the preceding claim, characterized in that the water-soluble organic acid is selected from adipic acid, malic acid, citric acid and mixtures thereof.   16. Composition according to claim 13, characterized in that the carbonated base is sodium hydrogencarbonate.   17. Composition according to any one of the preceding claims, characterized in that it further comprises a disintegrating agent.   18. Composition according to the preceding claim, characterized in that the disintegrating agent is present in the composition at a content ranging from 1 to 10% by weight, preferably from 2 to 8% by weight, more preferably from 3 to 5%, by weight, relative to the total weight of the composition.   19. Composition according to the preceding claim, characterized in that the disintegrating agent comprises at least one crosslinked polymer chosen from polyacrylate derivatives, cellulose derivatives, crystalline or amorphous, and mixtures thereof.   20. Composition according to the preceding claim, characterized in that the disintegrating agent is crosslinked carboxymethyl cellulose.   21. Composition according to any one of claims 1 to 19, characterized in that the first layer comprises at least one microcrystalline cellulose and the second layer comprises at least one amorphous cellulose.   22. Composition according to claim 21, characterized in that the microcrystalline cellulose is present in the first layer at a content ranging from 3 to 5% by weight, preferably at a content of approximately 4% by weight, relative to total weight of the first layer, and the amorphous cellulose is present in the second layer at a content ranging from 3 to 5% by weight, preferably at a content of approximately 4% by weight, relative to the total weight of the second layer.   23. Composition according to any one of the preceding claims, characterized in that the first layer further comprises at least one polyethylene glycol having a number of molecules of ethylene oxide ranging from 20 to 300.   24. Composition according to the preceding claim, characterized in that the polyethylene glycol is present in the first layer at a content ranging from 1 to 15%, by weight, preferably from 2 to 10%, by weight, and more preferably from about 5% by weight, based on the weight of the first layer.   25. Composition according to claim 23 or 24, characterized in that the polyethylene glycol has 90 molecules of ethylene oxide.   26. Composition according to any one of the preceding claims, characterized in that it further comprises at least one silver salt, preferably a silver chloride.   27. Composition according to the preceding claim, characterized in that the silver salt is present in the composition, at a content ranging from 0.1 to 20% by weight, preferably ranging from 0.5 to 10%, weight, relative to the total weight of the composition.   28. Composition according to any one of the preceding claims, characterized in that it is in the form of a pellet whose mass ranges from 20 to 40 g, preferably 25 to 35 g and more preferably is about 30 g.