MX2007001665A - A solid detergent comprising a c1-c3 alkyl carbonate salt. - Google Patents

Abstract

The present invention relates to a solid detergent composition comprising a C1-C3 alkyl carbonate salt, and to a process for making said composition. Use of a C1-C3 alkyl carbonate salt to improve the dispensing performance, the dissolution performance, and the cleaning performance of a laundry detergent composition.

Description

A SOLID DETERGENT CONTAINING A CRC3 ALKYCARCARBONATE SALT TECHNICAL FIELD The present invention relates to a solid detergent composition containing a C C3 alkylcarbonate salt.

BACKGROUND OF THE INVENTION The solid detergent compositions contain detergent surfactants to provide cleaning. However, detergent surfactants tend to gel upon contact with water, which hinders the capabilities of dispensing and dissolving the solid detergent composition. The manufacturers of detergents have tried to solve this problem incorporating effervescent and hydrotrope systems in the composition to improve the capacities of dispatch and dissolution of the same. Another means for improving the delivery profile and dissolution of a solid detergent composition is to incorporate a solvent into the composition, for example, a short alkyl chain alcohol. However, these solvents tend to become liquid at room temperature and this makes it difficult to incorporate them into solid detergent compositions. Methods for incorporating a liquid solvent into a solid detergent composition, such as absorption / adsorption on solid carriers, limit the detergent formulators. For example, there is a limit to the level of liquid solvent that can be incorporated into a solid detergent composition. If too much liquid solvent is incorporated in the solid detergent composition, the profile of the composition in terms of its flowability will be poor. However, if a sufficient amount of solvent is not incorporated into the solid detergent composition, the release and dissolution profiles of the composition will not improve. There remains a need to incorporate a sufficient amount of solvent in a solid detergent composition to improve its dispensing and dissolution profiles and, at the same time, still ensure that the composition has a good profile in terms of its flowability.

BRIEF DESCRIPTION OF THE INVENTION The present invention relates to a solid detergent composition comprising a C C3 alkylcarbonate salt.

DETAILED DESCRIPTION OF THE INVENTION C? -C alkylcarbonate salt The composition comprises a C C3 alkylcarbonate salt. A preferred C3 alkylcarbonate salt is a methylcarbonate salt and / or an ethylcarbonate salt and / or a propylcarbonate salt and / or an isopropylcarbonate salt. More preferably, the C C3 alkylcarbonate salt is a methylcarbonate salt. The salt may be an alkali metal salt and / or an alkaline earth metal salt of a dC3 alkylcarbonate. Preferably, a sodium and / or potassium and / or magnesium salt of a C C3 alkylcarbonate. More preferably, a sodium salt of a C3 alkylcarbonate. Most preferably, the C C3 alkylcarbonate salt is sodium methylcarbonate. The C C3 alkylcarbonate salt liberates carbon dioxide and a C C3 alkyl alcohol upon contact with water. This provides effervescence and the release of a solvent alcohol in the wash liquor, which in turn improves the delivery profile and dissolution of the solid composition. The C C3 alkylcarbonate salt can be used to improve the performance of the dispensing, dissolving, cleaning capabilities, as well as the aesthetics of the foam profile of the composition. This is especially preferred when the composition is a laundry detergent composition. The C C3 alkylcarbonate salt also provides effervescence, for example, during a laundry process. Preferably, the C C3 alkylcarbonate salt is in a particulate solid form, preferably in a free-flowing particulate form. The phrase "free-flowing particulate form" means that the d-C3 alkylcarbonate is in the form of separate separate particles. Preferably, the C C3 alkylcarbonate salt is in a particulate form having a particle size distribution so that the weighted average particle size is 50 to 2000 microns or, preferably, from 100 to 1000 micrometers or, preferably, from 100 to 800 micrometers or, preferably, from 400 to 700 micrometers. Generally, no more than 10% by weight of the alkylcarbonate salt CrC3 has a particle size of more than 1150 microns and, generally, no more than 10% by weight of the C3 alkylcarbonate salt has a particle size. of less than 50 micrometers. If the C C3 alkylcarbonate salt has an average particle size of more than 1500 micrometers, then it may be preferred that the C C3 alkylcarbonate salt be in the form of an extruded product. The composition preferably comprises from 0.01% to 50%, or preferably, from 0.1% to 20%, and more preferably from 1% to 10% by weight of C C3 alkylcarbonate salt. The C C3 alkylcarbonate salt may be in the form of an agglomerate, an extrudate, a spray-dried powder, a globule or combinations thereof. The C1-C3 alkylcarbonate salt may be in the form of a coparticulate mixture with an auxiliary detergent component. The term "coparticulate mixture" means that the C?-C3 alkylcarbonate salt and the auxiliary detergent component are mixed together so that they are present in the composition in the same particle. Preferably, the coparticulate mixture is in the form of: an extruded product, such as, for example, a globule, an elongated shape and / or needle; a spray-dried powder, an agglomerate, a flake or mixtures thereof. Preferably, the coparticulate mixture is in the form of an agglomerate.

It may be preferred that the auxiliary detergent component contains an acid source, such as sulfamic acid and / or citric acid. The presence of an acid source in the same particle of the C C3 alkylcarbonate salt improves hydrolysis of the C C3 alkylcarbonate salt upon contact with water and increases the rate at which the d-C3 alcohol is released into the water. wash liquor. It may be preferred that the auxiliary detergent component contains a bleach activator, such as tetraacetylethylenediamine. The C C3 alkyl alcohol that is released when the C C3 alkylcarbonate salt is contacted with the water improves the dissolution and the rate of perhydrolysis of the bleach activator. It may be preferred that the auxiliary detergent component contains a detergent surfactant, such as a nonionic detergent surfactant. This provides a good foam profile. It may be preferred that the auxiliary detergent component contains an acid source, such as sulfamic acid and / or citric acid, and a bleach activator, such as tetraacetylethylenediamine. The auxiliary component can also be a detergent surfactant, such as an alkyl sulfate or an alkyl polyglucoside. Preferred alkyl sulphates are described in detail below. A preferred alkyl polyglucoside is that marketed by Seppici under the trade name of Montanov S ™.

Synthesis of the C C3 alkylcarbonate salt The C?-C3 alkylcarbonate salt is generally obtained by a process comprising the steps of: (a) reacting an alkaline and / or alkaline earth metal source, for example, the metal or a hydride metal or an organometallic compound, such as an alkyl metal compound C? -4, with a C? -3 alcohol to form a metal alkoxide; and (b) the reaction of a metal alkoxide with carbon dioxide to form a C-? -C3 alkylcarbonate salt. It is not necessary to separate the metal alkoxide product from step (a) of any excess C-3 alcohol substrate, because the presence of an alcohol in step (b) is especially preferred. It is especially preferred that the metal alkoxide be dissolved in a liquid medium, such as alcohol, during step (b) when it is reacted with carbon dioxide. Any excess C -? - 3 alcohol substrate from step (a) that can be transported to step (b) can act as a liquid medium from step (b). This is especially preferred because the metal alkoxide product of step (a) is dissolved, in general, in any excess C C-3 alcohol and the reuse of the C sustrato? Alcohol3 alcohol substrate as the reaction medium of step (b) ) denies the need to isolate and dissolve the metal alkoxide again. The carbon dioxide is preferably in a gaseous form during step (b). The C C3 alkylcarbonate salt is generally formed as a solid precipitate. In general, it is separated from the liquid reaction medium of step (b) by any of the following suitable means: decanting, filtration, distillation of the reaction medium, centrifugation and / or evaporation of the reaction medium. Steps (a) and (b) can be carried out in the same reaction vessel or in different reaction vessels. To make the preferred sodium methylcarbonate, the sodium metal is reacted in solid form with the methanol in liquid form to form sodium methoxide which is dissolved in the excess methanol. Sodium methoxide reacts later with carbon dioxide in gaseous form to form sodium methylcarbonate in solid form. The sodium methylcarbonate is separated from the reaction medium by filtration.

Auxiliary detergent component The composition comprises, in general, an auxiliary detergent component. The auxiliary detergent component may be present in the composition in the same particle of the C 1 -C 3 alkylcarbonate salt or in separate particles of the CrC 3 alkylcarbonate salt. The auxiliary detergent component contains, in general, components selected from the group consisting of: anionic detergent surfactants, cationic detergent surfactants, non-ionic detergent surfactants, zwitterionic detergent surfactants, additives, polymeric co-additives such as polymeric polycarboxylates, bleach, chelants, enzymes, antiredepositing polymers, stain release polymers, dispersing agents and / or stain suspending agents, inhibitors dye transfer agents, fabric integrity agents, brighteners, foam suppressors, fabric softeners, flocculation agents, cationic components for fabric softening, perfumes and combinations thereof. Preferred anionic detergent surfactants are selected from the group consisting of: linear or branched, substituted or unsubstituted alkyl sulfates of C? 2 .-???, Linear or branched alkyl substituted or unsubstituted C 10-18 alkylbenzenesulfonates. preferably C10-13 linear alkylbenzenesulfonates and mixtures thereof. The linear C10-13 alkylbenzenesulfonates are commercially available. Linear C10-13 alkylbenzenesulfonates which are obtained by the sulfonation of commercially available linear alkylbenzenes (LABs) are highly preferred.; suitable LABs include LAB with low 2-phenyl content, such as those marketed by Sasol under the name Isochem® or those marketed by Petresa under the name Petrelab®, other suitable LABs include LAB with high 2-phenyl content, such as those marketed by Sasol with the name Hyblene®. Preferred cationic detergent surfactants are monoalkylmonohydroxyethyldimethylammonium quaternary chloride of C8-? O. quaternary monoalkyl monohydroxyethyldimethylammonium chloride of CKJ-12 and monoalkyl monohydroxyethyldimethylammonium chloride of C10. Preferred nonionic detergent surfactants are C8.18 alkoxylated alkyl alcohols, which generally have a molar degree of average alkoxylation of from 1 to 20, preferably from 1 to 10. Ethoxylated alkyl alcohols of C8.18 having a degree are preferred. molar ethoxylation average of 3 to 7. The composition may preferably contain an anionic detergent surfactant. Preferably, the composition may also contain a nonionic detergent surfactant and a cationic detergent surfactant.

The preferred additives are selected from the group consisting of: zeolite, such as, for example, zeolite A, zeolite P, zeolite MAP and zeolite X; phosphate, such as, for example, sodium tripolyphosphate; sodium carbonate; citric acid and / or water-soluble salts thereof such as sodium citrate; sulfamic acid and / or water-soluble salts thereof such as sodium sulphamate; polymeric polycarboxylates such as, for example, copolymers of acrylic acid and maleic acid or polyacrylate; and any mixture of these. However, it may be preferred that the composition contain low levels of additives, especially water-insoluble additives such as zeolite. This is particularly preferred if it is desired that the composition has a very high solubility. In addition, the composition may contain low levels of additives such as phosphate additives (eg, sodium tripolyphosphate): for example, due to the regulations of various countries on phosphate. It may be preferred that the composition contains less than 5% by weight of zeolite additive and less than 5% by weight of phosphate additive. It may be preferred that the composition be essentially free of zeolite additive and / or free of phosphate additive. By "essentially free of zeolite additive and / or phosphate additive" it is to be understood that the composition should not contain deliberately added zeolite additive and / or phosphate additive. The composition may contain sulfamic acid and / or salts thereof soluble in water. The water-soluble salts of the sulfamic acid can be alkali metal salts or sulfamate alkaline earth metal salts. Other examples of water-soluble salts of sulfamic acid include ammonium sulphamate, zinc sulfamate and lead sulfamate. A preferred water-soluble salt of sulfamic acid is sodium sulfamate. Preferably, the composition comprises sulfamic acid. It may be preferred that the composition contains a substituted non-alkyl carbonate salt, generally from 1% to 50%, from 5% to 25% or from 10% to 20% by weight of this salt. A preferred substituted non-alkyl carbonate salt is sodium carbonate and / or sodium bicarbonate. A most preferred substituted non-alkyl carbonate salt is sodium carbonate. The composition may comprise at least 10% by weight of sulfate salt. The sulfate salt is, very preferably, soluble in water. A preferred sulfate salt is an alkali metal salt of sulfate, and an especially preferred salt is sodium sulfate. High levels of sulfate salt can improve the cleaning ability of the composition to remove greasy stains. The composition preferably comprises very high levels of sulfate salt and generally comprises at least 15% or even 20% or even 25% and sometimes even at least 30% by weight of a sulfate salt. Other auxiliary components include: bleach, such as percarbonate and / or perborate; bleach, such as percarbonate and / or perborate, preferably in combination with a bleach activator such as tetraacetylethylenediamine, bleach activators of oxybenzene sulfonate such as nonanoyl oxybenzene sulfonate, caprolactam bleach activators, imide bleach activators such as acetamide N-nonanoyl-N- methyl, preformed percents such as peroxycaproic acid N, N-Ftaloyl amino, peroxy non-amyloid adipic acid or dibenzoyl peroxide; chelators such as diethylenetriamine pentaacetate, diethylenetriamine penta (methyl phosphonic acid), ethylenediamine-N'N'-disuccinic acid, ethylenediamine tetraacetate, ethylenediamine tetra (methylene phosphonic acid) and hydroxyethane di (methylene phosphonic acid); enzymes such as amylases, carbohydrases, cellulases, laccases, lipases, oxidases, peroxidases, proteases, pectate lyase and mannanase; foam suppressor systems such as silicone-based foam suppressors, brighteners, photo-bleaches, filler salts; fabric softening agents such as clay compounds, silicones and / or quaternary ammonium; flocculation agents such as polyethylene oxide; dye transfer inhibitors such as polyvinylpyrrolidone, poly 4-vinylpyridine N-oxide and / or copolymer of vinylpyrrolidone and vinylimidazole; components for the integrity of fabrics such as, for example, hydrophobically modified celluloses and oligomers, produced by the condensation of imidazole and epichlorohydrin; dispersants such as polycarboxylates, alkoxylated polyamines and ethoxylated ethyleneimine polymers; and antiredeposition components, such as carboxymethyl cellulose and polyesters.

Composition The composition can be found in any solid form of free flowing particles or in the form of a tablet. The term "free flowing particles" means that the composition is in the form of separate and distinct particles. Preferably, the composition is in the form of free-flowing particles such as, for example, agglomerates, extruded products, spray-dried, elongated, needle-shaped particles, flakes and mixtures thereof. It may be preferred that the composition is not in the tablet form. The free-flowing particulate composition generally has a bulk density of 450 g / l to 1000 g / l, the preferred low bulk density compositions have a bulk density of 550 g / l to 650 g / l and high compositions. Preferred bulk density have a bulk density of 750 g / l to 900 g / l. The composition can be a composition for laundry, for dishwashing or for cleaning hard surfaces. Preferably, the composition is a laundry composition. During the laundry process, the composition is usually contacted with water to provide a wash liquor having a pH of above 7 to 11, preferably 8 to 10.5. The composition can be obtained by means of any suitable process, such as, for example, spray drying, agglomeration, extrudation and / or compaction. The process can also include the steps of the process of pelletizing, micro-pelletizing, drying in a fluidized bed, agglomerating in a fluidized bed, enclosing the composition in a water-soluble film and combinations thereof. Preferably, the process comprises the step of contacting the CrC3 alkylcarbonate salt with a bleach activator and / or an acid source. 1 EXAMPLES EXAMPLE 1 Sodium methylcarbonate synthesis method A 20 liter flanged flask equipped with an agitator on top (steel rod with arc-shaped PTFE stirring blade), an inlet and outlet for dry nitrogen and two rigid glass tubes to be introduced is flame dried. C02 (arranged on opposite sides of the bottle). The system is purged with dry nitrogen for 15 minutes; then 10 liters of about a 30% solution of sodium methoxide, (about 55.5 moles of NaOMe) in methanol are poured under a stream of nitrogen and the solution is stirred. The C02 siphon tubes are adjusted in such a way that, when shaking, the bottom of each tube is exactly below the surface of the solution. Carbon dioxide (CP grade) is introduced into the solution by means of the two tubes and the flow rate is adjusted to maintain a constant bubbling for 36 hours so that during this time the sodium methylcarbonate is formed by precipitating the solution . After 36 hours, the precipitate of sodium methylcarbonate is filtered in large filter funnels, number 2, of porous sintered glass and washed with a total of 10 liters of methanol to ensure that all sodium methoxide that has been left unreacted is removed . The sodium methylcarbonate is washed with diethyl ether (total of 10 liters). The sodium methylcarbonate is dried under vacuum. The yield of sodium methylcarbonate is generally between 4.5 and 5.0 kg of each batch, when carried out with the amounts described above.

EXAMPLE 2 method of making particles containing sodium methylcarbonate 150 g of tetraacetylethylenediamine (TAED) powder is melted by heating it in an oven at 150 ° C for 2 hours and then placing it in an aluminum cup on a heating plate having a surface temperature exceeding 200 ° C while stirring vigorously to form a melted mixture. 23 g of non-ionic detergent surfactant Neodol C 5E5 ™ (supplied by Shell) is added to the molten TAED to form a hot mixture. 10 g of powdered sodium methylcarbonate is added to the hot mixture. Once the foam decreased, pour the hot mixture quickly into a powder mix of 70 g of sodium methylcarbonate, 80 g of sodium carbonate and 60 g of micronized (ie pre-ground) citric acid in a Kenwood FP570 ™ kitchen mixer, and mix at high speed for no more than 30 seconds. The resulting product is screened to remove any undesired particles, both too large (eg, particles having a diameter of more than 1.4 mm) and small (eg, particles having a diameter of less than 350 microns ). Particles containing sodium methylcarbonate are obtained.

EXAMPLE 3 method of making particles containing sodium methylcarbonate 100 g of powdered tetraacetylethylenediamine (TAED) are melted by heating it in an oven at 150 ° C for 2 hours and then placing it in an aluminum cup on a heating plate having a surface temperature exceeding 200 ° C while stirring vigorously to form a melted mixture. The melted mixture is quickly poured into a powder mixture of 40 g of sodium methylcarbonate, 40 g of sodium carbonate and 40 g of sulfamic acid in a Kenwood FP570 ™ kitchen mixer and mixed at high speed for no more than 30 seconds. . The resulting product is screened to remove any undesired particles, both too large (e.g., particles having a diameter of more than 1.4 mm) and small (e.g., particles having a diameter of less than 350 microns). Particles containing sodium methylcarbonate are obtained.

EXAMPLE 4 method of making particles containing sodium methylcarbonate 220 g of alkyl polyglucoside powder are melted (Montanov S of Seppici) by heating it in an oven at 65 ° C for 2 hours to form a melted mixture. The melted mixture is poured rapidly into a powder mixture of 350 g of sodium methylcarbonate and 700 g of sulfamic acid in a Kenwood FP570 ™ kitchen mixer and mixed at speed 2 for one minute. The resulting product is screened to remove any undesired particles, both too large (e.g., particles having a diameter of more than 1.4 mm) and small (e.g., particles having a diameter of less than 350 microns). Particles containing sodium methylcarbonate are obtained.

EXAMPLE 5 method of making particles containing sodium methylcarbonate 220 g of alkyl polyglucoside powder (Montanov S of Seppici), 350 g of sodium methylcarbonate and 700 g of sulfamic acid in a Kenwood FP570 ™ kitchen mixer and mix at speed 2 for 3 minutes. The resulting mixture is placed in a homo at 50 ° C for 1 hour. The mixture is then dosed in a Kenwood FP570 ™ kitchen mixer and mixed at speed 2 for another 3 minutes. The resulting product is screened to remove any undesired particles, both too large (e.g., particles having a diameter of more than 1.4 mm) and small (e.g., particles having a diameter of less than 350 microns). Particles containing sodium methylcarbonate are obtained.

EXAMPLES 6-14 particulate laundry detergent compositions containing sodium methylcarbonate The amount of ingredients detailed below are expressed as a percentage of the weight.

Claims (1)

1. NOVELTY OF THE INVENTION CLAIMS 1. A solid detergent composition comprising a C C3 alkylcarbonate salt. 2. The composition according to claim 1, further characterized in that the C1-C3 alkylcarbonate salt is a methylcarbonate salt. The composition according to any of the preceding claims, further characterized in that the alkylcarbonate salt of d-C3 is in the particulate form and has a weighted average average particle size of 100 to 800 microns, where no more of 10% by weight of the C3 alkylcarbonate salt has a particle size of more than 1150 microns and wherein not more than 10% by weight of the C3 alkylcarbonate salt has a particle size of less than 50 microns. 4. The composition according to any of the preceding claims, further characterized in that the composition comprises 0.1% to 20% by weight of a C3 alkylcarbonate salt. The composition according to any of the preceding claims, further characterized in that the composition comprises an auxiliary detergent component, and wherein the C C3 alkylcarbonate salt is in the form of a coparticulate mixture with the auxiliary detergent component. 6. The composition according to claim 5, further characterized in that the auxiliary detergent component comprises a bleach activator. The composition according to claim 5, further characterized in that the bleach activator comprises tetraacetylethylenediamine. 8. The composition according to claim 5, further characterized in that the auxiliary detergent component comprises an acid source. g. The composition according to claim 5, further characterized in that the auxiliary detergent component comprises sulfamic acid and / or citric acid. 10. The composition according to claim 5, further characterized in that the auxiliary detergent component comprises tetraacetylethylene diamine and an acid source. 11. The composition according to claim 5, further characterized in that the auxiliary detergent component comprises a detergent surfactant. 12. The composition according to claim 5, further characterized in that the auxiliary detergent component comprises an alkyl polyglucoside. 13. The composition according to any of the preceding claims, further characterized in that the composition comprises an anionic detergent surfactant. The composition according to claim 13, further characterized in that the composition additionally comprises a non-ionic detergent surfactant and a cationic detergent surfactant. 15. The composition according to any of the preceding claims, further characterized in that the composition comprises less than 5% by weight of zeolite additive and less than 5% by weight of phosphate additive. 16. The composition according to any of the preceding claims, further characterized in that the composition is essentially free of zeolite additive. 17. The composition according to any of the preceding claims, further characterized in that the composition is essentially free of phosphate additive. The composition according to any of the preceding claims, further characterized in that the composition comprises sulphamic acid or a water-soluble sulfamic acid salt. i. The composition according to any of the preceding claims, further characterized in that the composition comprises citric acid or a citric acid salt soluble in water. 20. The composition according to any of the preceding claims, further characterized in that the composition is in flowing particulate form. 21. The composition according to any of the preceding claims, further characterized in that the composition is a laundry detergent composition. 22. A process for making a composition according to any of the preceding claims; the process comprises the step of contacting a C1-C3 alkylcarbonate salt with an acid source. 23. A process according to claim 22, further characterized in that the process comprises the step of contacting a C? -C3 alkylcarbonate salt with an acid source and a bleach activator. 24. The use of a C C3 alkylcarbonate salt to improve the performance of the dispensing capacity of a laundry detergent composition. 25. The use of a C C3 alkylcarbonate salt to improve the performance of the dissolution capacity of a laundry detergent composition. 26. The use of a C C3 alkylcarbonate salt to improve the performance of the cleaning capacity of a laundry detergent composition. 27. The use of an alkylcarbonate salt of C ^ Cs to provide effervescence during the laundry washing process. 28. An auxiliary detergent composition comprising a C C3 alkylcarbonate salt and an auxiliary detergent component, preferably selected from a bleach activator, acid source, detergent surfactant and mixtures thereof; the C C3 alkylcarbonate salt is preferably in a form of a particulate mixture with the auxiliary detergent component.