MXPA06009553A - Laundry detergent composition comprising an anionic detersive surfactant sulphamic acid and/water soluble salts thereof - Google Patents

Abstract

The present invention relates to a laundry detergent composition comprising (i) sulphamic acid and/or water-soluble salts thereof;and (ii) at least 10wt%sulphate salt;and (iii) an anionic detersive surfactant.

Description

COMPOSITION DETERGENT FOR LAUNDRY THAT UNDERSTANDS AN ANIONIC DETERGENT SURFACTANT, SULFAMIC ACID AND / OR SOLUBLE SALTS IN EASTERN WATER FIELD OF THE INVENTION The present invention relates to laundry detergent compositions comprising an anionic detergent surfactant, sulfamic acid and / or water soluble salts thereof, and a sulfate salt.

BACKGROUND OF THE INVENTION Usually in a load for laundry, the fabrics to be washed are usually stained and soiled with a wide range of different types of stains and dirt. This variation in the type of stains and dirt leads to the demand for laundry detergent compositions that have a good cleaning performance over a wide range of different types of stains and dirt. Manufacturers of laundry detergents incorporate various cleaning technologies in their laundry detergent products in order to meet this cleaning demand through a wide range of types of stains and dirt; The cleaning performance of a cleaning technology is focused predominantly towards a particular type of stains and dirt. However, these cleaning technologies are not always compatible with each other, a technology that cleaning often prevents the cleaning performance of another cleaning technology. This can cause the cleaning performance of the laundry detergent to be only one, and that the cleaning performance of each of the individual cleaning technologies incorporated in it does not reach its optimum level. Laundry detergent manufacturers formulate their laundry detergent compositions to ensure that the compatibility between each of the cleaning technologies incorporated in these compositions is as optimal as possible. However, manufacturers of laundry detergents are often forced to accept negative effects on cleaning performance against a particular type of dirt if they wish to improve cleaning performance against a different type of dirt under certain conditions. Use such as high water hardness, for example, cleaning performance in grease filth and maintaining whiteness. In this way, there still remains a need for a laundry detergent composition comprising compatible cleaning technologies and in particular the need persists for a laundry detergent composition that is maximized for a good cleaning performance in grease soiling as well as for a good maintenance of whiteness through a wide range of conditions of use.

BRIEF DESCRIPTION OF THE INVENTION The present invention overcomes the above problem by providing a laundry detergent composition comprising: (i) sulfamic acid and / or water-soluble salts thereof; (ii) at least 10% by weight of a sulfate salt and (ii) an anionic detergent surfactant.

DETAILED DESCRIPTION OF THE INVENTION The laundry detergent composition is suitable for use in the washing of fabrics. The detergent composition comprises sulfamic acid and / or water-soluble salts thereof. The water-soluble salts of the suifamic 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 detergent composition comprises sulfamic acid. The detergent composition preferably comprises (in a sulfamic acid base) from 0.1 wt% to 20 wt% sulfamic acid and / or water soluble salts thereof; however, it may be preferred that the detergent composition comprises from 0.1% by weight to 15% by weight, or from 0.1% by weight to 8% by weight, or even from 0.1% by weight to 5% by weight, or even from 0.5% by weight to 3% by weight of sulfamic acid and / or water-soluble salts thereof. Sulfamic acid usually has the formula: H, NSO, H The sulfamic acid may be in zwitterionic form when it is in the detergent composition; Sulfamic acid in zwitterionic form has the formula: H3N + S03" Possibly at least part, or possibly all, sulfamic acid is in the zwitterionic form when it is contained in the composition, for example, as a separate particulate component. Sulfamic acid can act to improve the clearance and disintegration of the detergent composition. It is capable of reacting with a carbonate source, if present, in an aqueous environment such as washing liquor in the tub of an automatic washing machine or in the dispensing container of an automatic washing machine or in some other dispensing device such as a ball (granules) or a reticle, to produce carbon oxide gas. The combination of sulfamic acid and a carbonate source is a effervescence system that can improve the performance of the detergent composition. In addition, further agitation in the wash liquor provided by this effervescence system can also improve the cleaning performance of the detergent composition. Sulfamic acid has a very low hygroscopicity, significantly lower than that of other acids such as citric acid, malic acid or succinic acid; Sulfamic acid does not easily collect water. The sulfamic acid remains stable during storage of the detergent composition and does not readily degrade other components of the detergent composition under certain storage conditions such as high humidity. Surprisingly, sulfamic acid remains stable in the presence of mobile liquid phases, for example, nonionic detergent surfactants. Even with greater surprise, sulfamic acid does not easily break down perfumes during storage under high humidity. Preferably, the sulfamic acid and / or the water-soluble salts thereof are in particulate form. When the detergent composition is in particulate form, especially a flowing particulate form, the sulfamic acid and / or the water-soluble salts thereof are preferably in particulate form and are preferably incorporated into the detergent composition in the form of dry aggregated particles, preferably in the form of separate dry aggregate particles. The sulfamic acid can be in the form of a coparticulate mixture with a carbonate source, this coparticulate mixture can be produced by methods such as pressure agglomeration, roll compaction, extrusion, spheronization or any combination thereof. Preferably, the sulfamic acid and / or the water-soluble salts thereof, in particulate form have a weighted average particle size in the range of 210 micrometers to 1200 micrometers or, preferably, 250 micrometers to 800 micrometers. Preferably, the sulfamic acid and / or the water-soluble salts thereof, in particulate form have a particle size distribution such that not more than 35% by weight of the sulfamic acid and / or the water-soluble salts thereof have a particle size of less than 250 microns, preferably not more than 30% by weight of the sulfamic acid and / or the water-soluble salts thereof have a particle size of less than 250 microns and, preferably, no more than 35% by weight of the sulfamic acid and / or the water-soluble salts these have a particle size of greater than 1000 microns, preferably not more than 25% by weight of the sulfamic acid and / or the water-soluble salts these have a particle size greater than 1000 micrometers. The sulfamic acid and / or the water-soluble salts thereof have a higher synthesis capacity than other acids such as citric acid, malic acid, succinic acid and the salts thereof. Sulfamate, which is incorporated into the composition or which is formed in situ in the wash liquor by in situ neutralization of sulfamic acid, has a high efficiency of synthesis with free cations (such as calcium and / or magnesium cations for example). form a calcium sulfamate and / or magnesium sulfamate, respectively). This superior synthesis performance due to the presence of sulfamic acid and / or water-soluble salts thereof in the detergent composition is especially beneficial when the detergent composition comprises very low levels of, or does not comprise, zeolite additives and phosphate additives. , when it is much more likely that negative cleaning effects associated with high concentrations of calcium and / or magnesium free cations in the wash liquor will appear. A negative cleaning effect of this type associated with high concentrations of calcium and / or magnesium free cations in the wash liquor is deficient in the maintenance of whiteness. This is especially true when the detergent composition comprises high levels of carbonate. It may be preferred that the detergent composition comprises a carbonate salt, usually from 1% by weight to 50% by weight, or from 5% by weight to 25% by weight or from 10% by weight to 20% by weight of a carbonate salt. A preferred carbonate salt is sodium carbonate and / or sodium bicarbonate. A very preferred carbonate salt is sodium carbonate. The carbonate salt, or at least part of it, is usually in particulate form, generally with a weighted average particle size in the range of 200 to 500 microns. However, it may be preferred that the carbonate salt, or at least a portion thereof, be in micronized particulate form, typically with a weighted average particle size ranging from 4 to 40 microns.; preferably when the carbonate salt, or at least part of it, is in the form of a coparticulate mixture with a nonionic detergent surfactant. High carbonate levels improve the cleaning performance of the detergent composition by increasing the pH of the wash liquor. This increase in alkalinity improves the performance of the bleach, if present, increases the tendency of the dirt to be hydrolyzed, facilitating its removal from the tissues, and also increases the proportion and degree of ionization of the dirt to be cleaned.; Ionized soils are more soluble and easier to remove from the tissues during the washing stage of the laundry process. In addition, high carbonate levels improve the fluidity of the detergent composition when the latter is in flowing particulate form. However, carbonate anions readily form complexes with free calcium and / or magnesium cations in the wash liquor to form calcium carbonate and / or magnesium carbonate, respectively. Calcium carbonate and magnesium carbonate are insoluble in water and can precipitate out of the solution in the wash liquor, deposit in the dirt and on the surfaces of the fabrics in the wash liquor and produce a poor maintenance of the whiteness. The sulfamate decreases the formation of calcium carbonate and / or magnesium in the wash liquor by forming complexes with the free calcium and / or magnesium cations in the wash liquor. In addition, sulfamic acid is capable of reacting with calcium carbonate to form calcium and sulfamate, it is also capable of liberating carbon dioxide and water, thereby removing this calcium carbonate from the wash liquor and mitigating any negative effect on it. the maintenance of whiteness. The calcium sulphamate formed in situ in the wash liquor is soluble in water and does not precipitate out of the solution in the wash liquor. The composition may comprise from 0 wt% to 10 wt% of a carbonate salt to minimize the negative effects associated with the presence of the carbonate salt in the composition. However, as described above in more detail, it may be desirable to incorporate higher levels of carbonate salt in the composition. If the composition comprises high levels of carbonate salt such as at least 10% by weight of a carbonate salt, then the composition also preferably comprises an acid source which is capable of undergoing the acid / base reaction with a carbonate anion. The acid sources include sulfamic acid, citric acid, malic acid, succinic acid or any mixture thereof. An especially preferred acid source is sulfamic acid. Preferably, the weight ratio of the carbonate salt to the total amount of the acid source in the composition that is capable of undergoing an acid / base reaction with a carbonate anion, is preferably less than 50: 1, with greater preference less than 25: 1, or less than 15: 1, or less than 10: 1 or even less than 5: 1. In order to minimize the undesired effects of having too high a concentration of carbonate anions in the wash liquor, the total amount of the carbonate anion source in the composition is preferably limited. The preferred carbonate anion sources are carbonate salts and / or percarbonate salts. Preferably, the total amount of the carbonate anion source (based on the carbonate anion) in the composition is between 7% and 14% by weight greater than the theoretical amount of the carbonate anion source that is required to completely neutralize the total amount of the acid source present in the composition that is capable of undergoing an acid / base reaction with a carbonate anion. By controlling the total amount of the carbonate anion source in the composition with respect to the amount of the acid source in the composition, in the manner described above, all the benefits of having a source of carbonate anion in the composition are minimized in spite of minimizing all the undesirable negative effects of having too high concentration of carbonate anions in the wash liquor. The detergent composition comprises at least 10% by weight of a sulfate salt. It is preferred that the sulfate salt be soluble in water. A preferred sulfate salt is an alkali metal salt of sulfate, much more preferably it is sodium sulfate. High levels of sulfate salt can improve the cleaning performance of removal of grease stains from the detergent composition. The detergent composition preferably comprises very high levels of sulfate salt; the detergent composition usually comprises at least 15% by weight of a sulphate salt, or even 20% by weight of a sulphate salt, or even 25% by weight of a sulfate salt and sometimes even at least 30% by weight of a sulfate salt. Sodium sulfate and sulfamic acid are capable of combining as a complex in the presence of water to form a complex having the formula: 6 HSO3NH2 - 5 Na2SO4 - 15 H2O These complexes are suitable for use in the present invention. The sulfate salt, or at least part of it, is usually in particulate form, generally with a weighted average particle size in the range of 60 to 200 microns. However, it may be preferred that the sulfate salt, or at least part of it, be in the micronized particulate form, generally with a weighted average particle size in the range of 5 to less than 60 microns, and preferably from 5 to 40 microns. It may even be preferred that the sulfate salt be in unrefined particulate form, generally, with a weighted average particle size greater than 200 to 800 microns. The detergent composition comprises an anionic detergent surfactant. Preferably, the composition comprises from 5% by weight to 25% by weight of an anionic detergent surfactant. Preferably, the composition comprises from 6% by weight to 20% by weight, or from 7% by weight to 18% by weight, or from 8% by weight to 15% by weight, or from 8% by weight to 11% by weight or even 9% by weight to 10% by weight of an anionic detergent surfactant. The anionic detergent surfactant is preferably selected from the group comprising C8_18 linear or branched, substituted or unsubstituted alkyl sulfates; C8.18 linear or branched, substituted or unsubstituted alkylbenzenesulfonates; C12.18 linear or branched, substituted or unsubstituted alkylcarboxylates; and mixtures of these. The anionic detergent surfactant may be an alkyl sulfate, an alkyl sulfonate, an alkyl phosphate, an alkyl phosphonate, an alkylcarboxylate or any mixture thereof. The anionic surfactant may be selected from the group comprising alkylbenzene sulphonates (LASs) of C 10 -C 18, preferably linear C 10 -C 13 alkylbenzene sulphonates; alkylsulfates (AS) of primary C10-C20 random chain, straight chain, branched chain, are preferred linear alkyl sulphates, usually those having the following formula: CH3 (CH2) xCH2-OSO3"M +, where M is hydrogen or a cation that provides a charge neutrality, the Preferred cations include sodium and ammonium cations, wherein x is a whole number with a value of at least 7, preferably at least 9; (2,3) C10-C18 secondary alkyl sulfates having the following formulas: OSO3"M + OSO3" M * CH3 (CH2) X (H) CH3 or CH3 (CH2) (CH) CH2CH3 wherein, M is hydrogen or a cation that provides a charge neutrality, the preferred cations include sodium and ammonium cations, wherein x is an integer with a value of at least 7, preferably at least 9; and is an integer with a value of at least 8, preferably at least 9; C10-C18 alkylalkoxycarboxylates, branched middle chain alkyl sulfates as described in detail in U.S. Pat. num. 6,020,303 and 6,060,443; Modified alkylbenzene sulfonate (MLAS, for its acronyms in English) as described in greater detail in the patents WO 99/05243, WO 99/05242, WO 99/05244, WO 99/05082, WO 99/05084, WO 99/05241, WO 99/07656, WO 00 / 23549 and WO 00/23548; Methyl ester sulfonate (MES); Alpha-olefin sulfonate (AOS) and mixtures thereof. The preferred anionic detergent surfactants are selected from the group comprising linear or branched alkyl substituted or unsubstituted C12.18, linear or branched, substituted or unsubstituted C10-18 alkylbenzenesulfonates, preferably C10-13 linear alkylbenzene sulphonates and mixtures of these. The linear C10-13 alkylbenzenesulfonates are commercially available. Linear C10-13 alkylbenzene sulphonates which are obtained by the sulfonation of the commercially available linear alkylbenzenes (LABs) are most preferred; Suitable LABs include LAB with low 2-phenyl content, such as those marketed by Sasol under the name Isochem® or those commercialized by Petresa under the name Petrelab®, other suitable LABs include LAB with a high content of 2-phenyl, such as those marketed by Sasol under the name Hyblene®. It may be preferred that the anionic detergent surfactant be structurally modified in such a way that it causes the anionic detergent surfactant to be more calcium tolerant and that it is likely to precipitate less of the wash liquor in the presence of free calcium ions. This structural modification could be the introduction of a methyl or ethyl entity near the head group of the anionic detergent surfactant, since this can lead to an anionic detergent surfactant more tolerant to calcium due to the steric hindrance of the head group, which can reduce the affinity of the anionic detergent surfactant to form complexes with the calcium free cations in such a way that precipitation is caused outside the solution. Other structural modifications include the introduction of functional entities such as an amine entity in the alkyl chain of the anionic detergent surfactant.; this can lead to an anionic detergent surfactant more tolerant to calcium because the presence of a functional group in the alkyl chain of an anionic detergent surfactant can minimize the undesirable physicochemical property of the anionic detergent surfactant to form a smooth crystalline structure in the presence of ions Calcium free in the wash liquor. This may reduce the tendency of the anionic detergent surfactant to precipitate out of the solution. The presence of potassium cations in the detergent composition is not preferred due to the negative effect that the potassium cations have on the cleaning performance of the detergent composition. Therefore, the detergent composition preferably comprises less than 10% by weight, preferably less than 5% by weight, or even less than 2% by weight, or even less than 1% by weight, or even less than 0.2% by weight. weight, or even less than 0.1% by weight, or even less than 0.05% by weight, or even less than 0.04% by weight of potassium cations. With a greater preference, the detergent composition is practically free of, or even completely free of, deliberately added potassium cations. The detergent composition usually comprises at least one of other adjuvant components.

The detergent composition may comprise other adjuvant detergent surfactants in addition to the anionic detergent surfactant. The composition may comprise a nonionic detergent surfactant, a cationic detergent surfactant, a zwitterionic detergent surfactant, an amphoteric detergent surfactant or a mixture thereof. The composition may comprise an adjuvant detergent surfactant selected from the group comprising C12-18 linear or branched, substituted or unsubstituted alkylcarboxylic acids; linear or branched, substituted or unsubstituted C8-18 alkyl ethoxylated alcohols having an average degree of ethoxylation of 1 to 10; alkyl N-methyl glucosamides of C12.24 linear or branched, substituted or unsubstituted; C8-18 alkyl polyglycosides linear or branched, substituted or unsubstituted; amine oxides; C12.24 linear or branched, substituted or unsubstituted alkylbetaines; Quaternary quaternary monoalkyl monohydroxyethyl dimethyl ammonium compounds or branched; and mixtures of these. The preferred quaternary ammonium cationic detergent surfactants have the formula: (R) (R1) (R2) (R3) N + X- wherein R is a linear or branched, substituted or unsubstituted C6.18 alkyl or alkenyl entity, R1 and R2 are independently selected from the methyl or ethyl entities, R3 is a hydroxyl, hydroxymethyl or hydroxyethyl entity, X is an anion that provides a charge neutrality, preferred anions include halides (such as, for example, chloride), sulfate or sulfonate. Preferred cationic detergent surfactants are monoalkyl monohydroxyethyl dimethyl quaternary ammonium chloride of C8.10, monoalkyl monohydroxyethyl dimethyl quaternary ammonium chloride of C10-12 and monoalkyl monohydroxyethyl dimethyl ammonium chloride of C10. As a rule, the detergent composition comprises more than one type of detergent surfactant with the purpose of obtaining a good cleaning performance through a wide range of dirt types and in a wide variety of washing conditions. It may be preferred that the detergent composition comprises a detergent surfactant system that is substantially tolerant of hardness; this is considered especially preferred when the detergent composition comprises very low levels of, or does not contain, a zeolite additive and a phosphate additive, or if the detergent composition is intended to be used under hard water conditions. A preferred hard tolerant surfactant surfactant system is one which comprises an anionic detergent surfactant, a nonionic detergent surfactant and optionally a cationic detergent surfactant. Preferably, the detergent composition comprises 7% by weight to 15% by weight, preferably 8% by weight to 12% by weight of an anionic detergent surfactant, from 2% by weight to 6% by weight, preferably 2% by weight. Weight% to 4% by weight of a nonionic detergent surfactant and optionally 0.5% by weight of 2% by weight, preferably 1% by weight of 2% by weight of a cationic detergent surfactant. This surfactant system is considered especially preferred when the detergent composition comprises low levels of, or does not comprise, a zeolite additive and a phosphate additive. The detergent composition may comprise from 1% by weight to 40% by weight of an adjuvant additive other than sulfamic acid and / or water soluble salts thereof; Water-soluble adjuvant additives are considered especially preferred. The adjuvant additives are preferably selected from the group comprising sodium carbonate, citric acid and / or water-soluble salts thereof such as sodium citrate; polymeric polycarboxylates such as copolymers of acrylic acid and maleic acid, or polyacrylate; zeolite; and any mixture of these. However, it is considered preferred that the detergent composition comprises low levels of adjuvant additives, especially water-insoluble adjuvant additives such as zeolite. This is considered especially preferred if it is desired that the detergent composition be much more soluble. further, the detergent composition may comprise low levels of adjuvant additives such as phosphate additives (for example sodium tripolyphosphate): for example due to phosphate regulations in various countries. It is considered preferable that the detergent composition comprises less than 9% by weight of zeolite additives and less than 9% by weight of phosphate additives, or even less than 5% by weight of zeolite additives and less than 5% by weight of additives. phosphate additives, or even less than 2% by weight of zeolite additives and less than 2% by weight of phosphate additives, or even less than 1% by weight of zeolite additives and less than 1% by weight of additives of phosphate. It can be considered preferable that the composition be practically free of, or even completely free of, deliberately added zeolite additives and phosphate additives. Phosphate additives include sodium tripolyphosphate. The zeolite additives include zeolite A, zeolite P, zeolite MAP and zeolite X. The detergent composition usually comprises adjuvant components. These detergent adjuvant components include a bleach such as percarbonate and / or perborate.; bleach such as percarbonate and / or perborate, preferably in combination with a bleach activator such as tetraacetylethylenediamine, oxybenzene sulphonate bleach activators such as nonanoyloxybenzene sulfonate, caprolactam bleach activators, imide bleach activators such as N-nonanoyl-N- methyl imide, preformed peracids such as N, N-naphthoylamino peroxycaproic acid, nonilamidoperoxiadipic acid or dibenzoyl peroxide; chelating agents such as diethylenetriamine pentaacetate, diethylenetriaminpentamethylphosphonic acid, ethylenediamine-N'N'-disuccinic acid, ethylenediaminetetraacetate, ethylenediaminetetramethylenephosphonic acid and hydroxyethanedimethylenephosphonic acid; enzymes such as amylases, carbohydrases, celluloses, laccases, lipases, oxidases, peroxidases and proteases; foam suppressor systems such as silicone-based foam suppressors; brighteners; photo-bleach; cargo salts; fabric softening agents atles such as clay, silicone compounds and / or quaternary ammonium; flocculants such as polyethylene oxide; dye transfer inhibitors such as polyvinylpyrrolidone, poly 4-vinylpyridine N-oxide and / or vinylpyrrolidone and vinylimidazole copolymer; integrity components of fabrics such as hydrophobically modified cellulose and oligomers produced by the condensation of midazole and epichlorohydrin; dispersants such as polycarboxylates, polymers of alkoxylated polyamides and ethoxylated ethylenimines; and antiredeposit components such as carboxymethylcellulose and polyesters. Preferably, the detergent composition comprises less than 1% by weight of a chlorine bleach and less than 1% by weight of a bromine bleach. Preferably, the detergent composition is free of chlorine bleach and bromo bleach deliberately added. The detergent composition may be in any form, for example, the detergent composition may be in the form of a liquid. Alternatively and preferably, the detergent composition is in the form of a solid such as in the form of flowing particles or in the form of a tablet. Preferably, the detergent composition is in the form of flowing particles such as agglomerates, extrudates, spray-dried particles, noodles, needles, scales and mixtures thereof. It may be preferred that the composition is not in the form of a tablet. It can be considered preferable that the composition is a granular laundry detergent composition. The detergent composition in flowing particulate form generally has a bulk density of 450 g / l to 1000 g / l, the preferred low bulk density detergent compositions have a bulk density of 550 g / l to 650 g / l and high detergent compositions. Preferred bulk density have a bulk density of 750 g / l to 900 g / l. During the laundry process, the composition is usually contacted with water to provide a wash liquor having a pH greater than 7 to 11, preferably 8 to 10.5.

Examples Example 1 Aqueous pulp Preparation of a spray-dried powder The aqueous pulp described above was heated to 80 ° C, at the same time as the ingredients were added, which was done continuously and with stirring. Once the ingredients have been added, they are mixed for an additional 60 seconds. During this step, sulfamic acid is neutralized to the sodium salt form by the action of sodium carbonate. The slurry is fed at high pressure (from 5.5x106 Nm "2 to 6.0x106 Nm" 2) into an up-to-date spray-drying counting tower with an inlet air temperature of 300-310 ° C. The pulp was subjected to atomization and the atomized pulp was dried to produce a solid mixture which was then cooled and sieved to remove too large material (> 2 mm) to produce a spray-dried powder. The fine material (<0.15 mm) was sedimented with the exhaust air in the spray drying tower and was collected in a containment system. The spray-dried powder has a moisture content of 5% by weight and a bulk density of 450 g / l. The composition of the spray-dried powder is given below.

Spray dried powder.

Preparation of a granular laundry detergent composition in accordance with the present invention. 13.56 k of spray-dried powder are mixed dry in a mixer with a total of 10.89 k of other dry aggregate material to produce a dry blended material. The dry mixing stage is carried out for 30 minutes in a small scale concrete mixer (1 m diameter) at a speed of 2.5 rad / s (24 rpm) to simulate factory mixing conditions and ensure that the granules are distributed homogeneously. 0.5 k of non-ionic surfactant (ethoxylated alkyl alcohol having an average degree of ethoxylation of 7 at a temperature of 60 ° C on the dry blended material using the same concrete mixer at a rotation speed of 2.5 rad / s) is sprayed. 24 rpm.) Then the nonionic surfactant is applied by spray on the dry mixed material, then 0.05 k of perfume is sprayed onto the dry blended material to produce a granular laundry detergent composition in accordance with the present invention. of the granular laundry detergent composition according to the present invention is as follows.

A granular laundry detergent composition according to the present invention.

The finished product has a bulk density of 610 g / l and fluid.

Examples 2 to 5 Four granular detergent products comprising sulfamic acid were prepared by mixing together the following materials. The sulfamic acid used is granular "Mixed Grade" distributed by Rhodia. The production of the spray-dried powder is carried out according to the same method described in Example 1. The dry mixing step is carried out for 30 minutes in a small scale concrete mixer (1 m diameter) at a speed of 2.5 rad / s (24 rpm) to simulate the conditions of factory mixing and ensure that the granules are described in a homogeneous way. After the dry mixing step, the non-ionic detergent surfactant AE7 at a temperature of 60 ° C is sprayed onto the dry blended material in the same concrete mixer at a rate of 2.5 rad / s (24 rpm). of the granular laundry detergent compositions resulting in accordance with the present invention are as follows.

Each of the products produced had a bulk density of at least 600 g / l and all were flowing. The particles used in these products are described in more detail below. Cationic detergent surfactant particle. The cationic surfactant particle used in Examples 2 to was obtained based on batches of 14.6 k in a Morton FM-50 Loedige team. 4.5 k of micronized sodium sulfate and 4.5 k of micronized sodium carbonate are previously mixed in the mixer. 4.6 k of an aqueous solution of monoalkyl monohydroxyethyl dimethyl ammonium chloride of C12.14 (cationic surfactant) 40% active is added to the micronized sodium sulfate and to the micronized sodium carbonate in the mixer at the same time as the unit is operated. main drive and the mechanical selector. After approximately two minutes of mixing, a mixture of 1.0 k with a weight ratio of 1: 1 of micronized sodium sulfate and micronized sodium carbonate is added to the mixer as a powdering agent. The resulting agglomerate is collected and dried using a fluid bed dryer on a 2500 l / min air base at 100-140 ° C for 30 minutes. The resulting powder is screened and the fraction through 1400 μm is collected as the cationic surfactant particle. The composition of the cationic surfactant particle is as follows: Particle of non-ionic detergent surfactant. The particle of non-ionic detergent surfactant used in Examples 2-5 is manufactured in batches of 25 k using a cement mixer of 1 m diameter at 2.5 rad / s (24 rpm). 18.9 k of sodium sulfate is added from light grade available from Hamm under the tradename Rombach Leichtsulfat® to the mixer, and then 6.1 k of C14-15 alkyl ethoxylated alcohol with an average degree of ethoxylation of 7 (AE7) in liquid form on sodium sulfate at 40 ° C; and the mixture is mixed for 3 minutes to produce the free flowing, nonionic detergent surfactant particle. The composition of the non-ionic detergent surfactant particle is as follows: Particle of anionic detergent surfactant. The linear alkyl benzene sulphonate particle used in the Examples 2 to 5 were obtained on a batch basis of 14 k in a Morton FM-50 Loedige equipment. First, 7.84 k of micronized sodium sulfate and 2.70 k of micronized sodium carbonate are added to the mixer at the same time that the main traction unit and the mechanical selector are operated. Then, 3.46 k of linear alkylbenzene sulphonate paste (78% by active weight) are added to the mixer and mixed for 2 minutes to produce a mixture. The resulting mixture is collected and dried using a fluid bed dryer on the air base of 2500 l / m at 100-140 ° C for 30 minutes to produce the anionic detergent surfactant particle. The composition of the anionic detergent surfactant is as follows: Examples 6 to 9 Four granular detergent products containing sulfamic acid were prepared by mixing the following materials together. The sulfamic acid used was of "mixed grade" granular distributed by Rhodia. A dry mixing step is carried out for 30 minutes in a small scale concrete mixer (1 m diameter) at a speed of 2.5 rad / s (24 rpm) to simulate factory mixing conditions and ensure that the granules are distributed homogeneously. After the mixing step, non-ionic detergent surfactant (AE7) is sprayed at a temperature of 60 ° C on the mixed powders in the same concrete mixer at a speed of 2.5 rad / s (24 rpm). Immediately after the non-ionic surfactant is added, the zeolite is dosed and added to the mixer and mixing is continued for an additional 5 minutes.

Each of the processed products had a bulk density of at least 800 g / l and all were flowing. The surfactant agglomerates used in these products are described in more detail below. Surfactant agglomerate 1. The surfactant agglomerate 1 used in Examples 6 to 9 was obtained on a 13.1k batch basis in a Morton FM-50 Loedige equipment. A paste of linear alkylbenzene sulphonate (78% active) together with zeolite A is added to the mixer at the same time as the main drive unit and the mechanical selector were operated. After approximately two minutes of mixing, 1.0 k of zeolite is added to the mixer as a powdering agent. The resulting powder is collected and dried using a fluid bed dryer on an air base of 2500 l / min at 100 -140 ° C for 30 minutes. The resulting powder is screened and the fraction up to 1400 μm is collected as the surfactant agglomerate 1. The composition of the surfactant agglomerate appears below.

Surfactant agglomerate 2. The linear alkylbenzene sulphonate particle used in the Examples 6 to 9 were obtained on a batch basis of 14 k in a Morton FM-50 Loedige equipment. First, 7.84 k of micronized sodium sulfate and 2.70 k of micronized sodium carbonate are added to the mixer at the same time that the main traction unit and the mechanical selector are operated. Then 3.46 k of linear benzene sulfonate paste (78% by active weight) is added to the mixer and mixed for two minutes to produce a mixture. The resulting mixture is collected and dried using a fluid bed dryer on the air base of 2500 l / min at 100-140 ° C for 30 minutes to produce the anionic detergent surfactant particle. The composition of the anionic detergent surfactant is as follows: Example 10 Agglomerate of sulfamic acid. Fine granular sulfamic acid is prepared into agglomerated particles by the following process: 10.00k of granular sulfamic acid together with 2.25k of zeolite are added to a Morton FM-50 Loedige equipment. With the main drive unit and the mechanical selector operating in the mixer, 2.25 k of melted PEG-4000 at 65 ° C are added to the mixer. Once the PEG-4000 is completely added, 500 g of zeolite is added to act as a powdering agent. The mixing operation is continued until the PEG-4000 solidifies completely. The resulting powder is screened and the fraction is collected through 1400 μm as the sulfamic acid agglomerate. The composition is as follows: The agglomerate of sulfamic acid produced is free flowing and was used to produce a granular laundry detergent composition in accordance with the present invention. The formulation of the granular laundry detergent composition that was produced in accordance with the present invention is as follows.

The resulting product had a density of 850 g / l

Claims (17)

NOVELTY OF THE INVENTION CLAIMS

1. A laundry detergent composition; the composition comprises: (i) Sulfamic acid and / or water-soluble salts thereof; and (ii) at least 10% by weight of a sulfate salt, preferably sodium sulfate; and (iii) an anionic detergent surfactant.

2. The composition according to claim 1, further characterized in that the composition is in the form of flowing particles.

3. The composition according to any of the preceding claims, further characterized in that the composition comprises at least 15% by weight, preferably at least 20% by weight of a sulfate salt, preferably sodium sulfate.

4. The composition according to any of the preceding claims, further characterized in that the composition comprises less than 0.04% by weight of potassium cations.

The composition according to any of the preceding claims, further characterized in that the composition comprises from 0.1 wt% to 5 wt% sulfamic acid and / or water soluble salts thereof.

6. The composition according to any of the preceding claims, further characterized in that the sulfamic acid and / or the water-soluble salts thereof are in particulate form and have a weighted average particle size ranging from 250 microns to 800 microns; optionally, the sulfamic acid and / or the water-soluble salts thereof have a particle size distribution such that no more than 35% by weight of sulfamic acid and / or the soluble salts thereof have "a smaller particle size than 250 micrometers and not more than 35% by weight of sulfamic acid and / or the water-soluble salts thereof have a particle size greater than 1000 micrometers

7. The composition according to any of the preceding claims, further characterized in that the The composition comprises less than 9% by weight of zeolite additives and less than 9% by weight of phosphate additives

8. The composition according to any of the preceding claims, further characterized in that the composition comprises from 7% by weight to 15% by weight. % by weight of an anionic detergent surfactant, from 2% by weight to 5% by weight of a nonionic detergent surfactant and optionally from 0.5% by weight to 2% by weight of a surfactant cationic detergent

9. The composition according to any of the preceding claims, further characterized in that the composition comprises from 10% by weight to 20% by weight of a carbonate salt, preferably sodium carbonate.

10. The composition according to any of the preceding claims, further characterized in that the composition comprises citric acid.

The composition according to any of the preceding claims, further characterized in that the composition comprises a carbonate salt and wherein if the composition comprises more than 10% by weight of a carbonate salt, then the weight ratio of the salt of carbonate with respect to sulfamic acid is less than 5: 1.

12. The composition according to any of the preceding claims, further characterized in that the composition comprises: (i) A source of carbonate anion; and (ii) an acid source, which includes sulfamic acid, which is capable of undergoing an acid / base reaction with a carbonate anion, wherein the total amount of carbonate anion source, in a carbonate anion base, in the composition is it finds between 7% by weight and 14% by weight greater than the theoretical amount of carbonate anion source that is required to completely neutralize the total amount of acid source present in the composition which is capable of undergoing an acid / base reaction with a carbonate anion.

The composition according to any of the preceding claims, further characterized in that the anionic detergent surfactant is a linear alkylbenzene sulphonate.

14. The use of sulfamic acid to reduce the degradation of perfume during the storage of a detergent composition.

15. The use of sulfamic acid or a water-soluble salt thereof as a detergent additive.

16. The use of sulfamic acid to reduce the collection of moisture from a detergent composition.

17. The use of sulfamic acid as a stable flow aid during the storage of a detergent composition.