MXPA06009548A - Laundry detergent composition comprising an anionic detersive surfactant sulphamic acid and/or water soluble salts thereof - Google Patents

Abstract

The present invention relates to a laundry detergent composition comprising (i) sulphamic acid and/or water-soluble thereof;and (ii) an anionic detersive surfactant;and (iii) from 0 wt%to 8 wt%zeolite builder;and (iv) from 0 wt%to 8 wt%phosphate builder.

Description

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

BACKGROUND OF THE INVENTION Laundry detergent compositions comprising an anionic detergent surfactant need to ensure that the anionic detergent surfactant is capable of providing a fabric cleaning benefit under mild water wash conditions as well as in hard water wash conditions. Anionic detergent surfactants such as linear alkylbenzene sulphonate are capable of forming complexes with free cations, including divalent cations such as calcium and / or magnesium cations, which are present in the wash liquor so as to cause the anionic detergent surfactant is precipitated out of the solution, which leads to a reduction in the activity of the anionic detergent surfactant. In extreme cases, this can result in poor maintenance of whiteness, poor cleaning performance in the removal of particulate spots and poor fabric integrity benefits. This is especially problematic when the laundry detergent composition is used under washing conditions in hard water, when there is a high concentration of free calcium cations. The tendency of the anionic detergent surfactant to complex with these free cations in the wash liquor is such that its precipitation is mitigated out of the solution by the presence of additives such as zeolite additives and phosphate additives, which have a constant high binding to free cations such as calcium cations. These additives sequester the free calcium and magnesium cations and reduce the formation of these undesirable complexes. However, the zeolite additives are insoluble in water and their incorporation in laundry detergent compositions leads to a poor dissolution of the laundry detergent composition and can lead to undesirable residues being deposited on the fabrics. In addition, detergent compositions comprising high levels of zeolite additives form nebulous and undesirable washing liquors upon contact with water. Whereas phosphate additives allegedly do not have favorable environmental profiles and their use in laundry detergent compositions has become less common, for example, due to phosphate legislation in many countries. In view of the problems mentioned above, the need persists for a laundry detergent composition comprising an anionic detergent surfactant, having a good anionic detergent surfactant activity, a good environmental profile and a good dissolution profile.

BRIEF DESCRIPTION OF THE INVENTION The present invention solves the above problems by providing a laundry detergent composition comprising (i) sulfamic acid and / or water soluble salts thereof; (I) an anionic detergent surfactant; (iii) from 0% by weight to 8% by weight of a zeolite additive; and (iv) from 0 wt% to 8 wt% of a phosphate additive.

DETAILED DESCRIPTION OF THE INVENTION The laundry detergent composition is suitable for use in the laundry of fabrics. The detergent composition comprises sulfamic acid and / or water soluble salts thereof. The water-soluble salt of the sulfamic acid can be an alkali metal salt or a sulfamate metal salt. 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% to 20% by weight of sulfamic acid and / or water-soluble salts thereof; however, it may be preferred that the detergent composition comprises from 0.1% to 15% by weight, or from 1% to 12% by weight, or even from 3% to 10% by weight of sulfamic acid and / or water-soluble salts. of this one Sulfamic acid usually has the formula: H2NS03H The sulfamic acid may be in zwitterionic form when it is in the detergent composition; Sulfamic acid in zwitterionic form has the formula: H3N + SO3" 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 improve the despatch and disintegration of the detergent composition. It is capable of reacting with a carbonate source, if present, in an aqueous environment such as the washing liquor in the drum 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, non-ionic 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, preferably are 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 may be in the form of a coparticulate mixture with a carbonate source, this coparticulate mixture may 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 microns to 1200 microns, or preferably 250 microns to 800 microns. 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 has a particle size of less than 250 microns, and preferably not more than 35% by weight. The weight of the sulfamic acid and / or the water-soluble salts thereof has 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 thereof has a size of particle greater than 1000 micrometers. Sulfamic acid and / or water-soluble salts thereof have a higher capacity for synthesis than other acids, such as citric acid, malic acid, succinic acid and 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 for example calcium and / or magnesium cations to form a calcium sulfamate and / or magnesium sulfamate, respectively). This superior synthesis performance due to the presence of the sulfamic acid and / or the 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 a poor 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, typically 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 salt of carbonate. 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 part thereof, which is in particulate form, usually has a weighted average particle size in the range of 4 to 40 μm.; this is especially preferred when the carbonate salt, or at least part thereof, 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 any, increases the tendency of the dirt to be hydrolyzed, which facilitates its removal from the fabrics, and also increases the proportion and degree of ionization of the dirt that leaves. to clean, the ionized soils are more soluble and easier to remove from the fabrics 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 is insoluble in water and can be precipitated out of the solution in the wash liquor, deposited in the dirt and on the surfaces of the fabrics in the wash liquor and produce a poor maintenance of whiteness. Sulfamate decreases the formation of calcium carbonate in the wash liquor by forming complexes with the free calcium cations in the wash liquor. In addition, sulfamic acid is capable of reacting with calcium carbonate to form calcium sulphamate, 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 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 source includes 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% to 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 carbonate anion source in the composition are minimized despite of minimizing all the undesirable negative effects of having too high a concentration of carbonate anions in the wash liquor. The detergent composition comprises an anionic detergent surfactant. The anionic surfactant can be selected from the group comprising alkylbenzene sulfonates (LAS) of C- | 0-Ci8, preferably linear C-10-C13 alkylbenzene sulphonates; alkylsulfates (AS) of primary C? 0-C2o primary random chain, straight chain, branched chain, linear alkyl sulphates are preferred, 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 are the sodium and ammonium cations, where x is an integer with a value of at least 7, preferably at least 9, the linear or branched, substituted or unsubstituted alkylsulfate of C? 2-C? 8; (2,3) C10-C18 secondary alkyl sulfates, usually having the following formulas: OSQ lvf "OSD? 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) 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 anionic detergent surfactants are: linear or branched, substituted or unsubstituted alkyl sulfates of C12-18, linear or branched, substituted or unsubstituted alkylbenzenesulfonates of C10-13, preferably linear alkylbenzenesulfonates of C? 0-? 3, and mixtures of these . 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 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 linear or branched, substituted or unsubstituted C12-18 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 C? 2-24 linear or branched, substituted or unsubstituted; linear or branched, substituted or unsubstituted C8-? alkyl polyglycosides; amine oxides; linear or branched C 2-24 alkylbetaines, substituted or unsubstituted; Quaternary quaternary monoalkyl monohydroxyethyldimethylammonium compounds; and mixtures of these. The preferred cationic quaternary ammonium detergent surfactants have the formula: (R) (R1) (R2) (R3) N + X- wherein R is a linear or branched C6-18 alkyl or alkenyl entity, substituted or unsubstituted, R1 and R2 are independently selected from 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 chloride) , sulfate or sulfonate. Preferred cationic detergent surfactants are monoalkyl monohydroxyethyldimethylammonium quaternary chloride of C8-?, Monoalkyl monohydroxyethyldimethylammonium chloride of C10-12 and monoalkyl monohydroxyethyldimethylammonium chloride of C? 0. 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 from 7% by weight to 15% by weight, preferably from 8% by weight to 12% by weight of an anionic detergent surfactant, from 2% by weight to 6% by weight, preferably from 2% by 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 very low levels of, or does not comprise, a zeolite additive and a phosphate additive. The detergent composition comprises from 0 wt% to 8 wt% of a zeolite additive. The detergent composition preferably comprises from 0% by weight to 6% by weight, or from 0% by weight to 4% by weight, or from 0% by weight to 2% by weight of a zeolite additive. It may even be considered preferable that the composition be substantially free of, or even completely free of, a deliberately added zeolite additive. This is especially preferred if it is desired that the detergent composition be very much soluble to minimize the amount of water-insoluble residues (for example those that deposit on the surfaces of the fabrics), and also when it is very desirable to have a wash liquor. transparent. Zeolite additives include zeolite A, zeolite X, zeolite P and zeolite MAP. The detergent composition comprises from 0 wt% to 8 wt% of a phosphate additive. The detergent composition preferably comprises from 0% by weight to 6% by weight, or from 0% by weight to 4% by weight, or from 0% by weight to 2% by weight of a phosphate additive. It may even be considered preferable that the detergent composition be substantially free of, or even completely free of, a deliberately added phosphate additive. Phosphate additives include sodium tripolyphosphate. The composition may comprise adjuvant additives to part of the zeolite additive and the phosphate additive, water soluble adjuvant additives are especially preferred. The adjuvant additives are preferably selected from the group comprising sodium carbonate, sulfamic acid and / or water soluble salts thereof, 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.

It may be considered preferable that the composition comprises very low levels of water insoluble additives such as zeolite A, zeolite X, zeolite P and zeolite MAP while also comprising relatively high levels of water soluble adjuvant additives such as sodium carbonate, sulfamic acid and citric acid. It may be preferable that the weight ratio of the sodium carbonate to the zeolite additive be at least 5: 1, preferably at least 10: 1, or at least 15: 1, or at least 20: 1 or even at least 25. :1. The detergent composition may comprise less than 10% by weight, or from 0% by weight to 5% by weight, or less than 4% by weight, or less than 2% by weight of a silicate salt. It can even be considered preferable that the detergent composition be free of a silicate salt. The silicate salts include water-insoluble silicates. The silicate salts include amorphous silicates and crystalline layered silicates (for example SKS-6). A preferred silicate salt is sodium silicate. It may be preferred that the detergent composition comprises at least 1% by weight, or at least 2% by weight, or at least 3% by weight, or at least 4% by weight, or even at least 5% by weight of polymeric polycarboxylates . High levels of polymeric polycarboxylates can act in the wash liquor as additives and free calcium ion sequestrants, they can also act as stain dispersants and provide an improved cleaning benefit of removal of particulate stains. Preferred polymeric polycarboxylates include: polyacrylates, preferably those having a weight average molecular weight of 0.0016 g (1000 Da) at 0.033 g (20,000 Da); copolymers of maleic acid and acrylic acid, preferably those having a molar ratio of maleic acid monomers to acrylic acid monomers of 1: 1 to 1: 10 and a weighaverage molecular weight of 0.016 g (10,000 Da) at 0.33 g (200,000 Da), or preferably those having a molar ratio of maleic acid monomers to the acrylic acid monomers of 0.3: 1 to 3: 1 and a weighaverage molecular weight of 0.0016 g (1000 Da) ) at 0.083 g (50,000 Da). The detergent composition preferably comprises at least 10% by weight of a sulfate salt. High levels of sulfate salt can improve the cleaning performance of removing greasy stains from the detergent composition. The detergent composition may preferably comprise very high levels of a 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 sulphate salt and sometimes even at least 30% by weight by weight of a sulfate salt. A preferred sulfate salt is sodium sulfate. Sodium sulfate and sulfamic acid are capable of forming complexes together in the presence of water to form a complex having the general formula: 6 HSO3NH2- 5Na2SO4-15H2O 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 weighaverage 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 weighaverage particle size in the range of 5 to less than 60 microns, and preferably from 5 to 40 micrometers. It may even be preferred that the sulfate salt be in unrefined particulate form, generally with a weighaverage particle size greater than 200 to 800 microns. The composition may preferably comprise less than 60% by weight of the combined total amount of carbonate and sulfate. The composition may comprise less than 55% by weight, or less than 50% by weightor less than 45% by weight, or less than 40% by weight of the combined total amount of carbonate and sulfate. The presence of potassium cations in the detergent composition is not desirable due to the negative effect that 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 greater preference, the detergent composition is substantially free of, or even completely free of, deliberately added potassium cations. It may also be considered preferable that the composition comprises a dirt dispersant having the formula: bis ((C2H5O) (C2H4O) n) (CH3) -N + -CxH2x-N + - (CH3) -bis ((C2H50) (C2H40) n) wherein n = from 20 to 30, and x = from 3 to 8. Other suitable soil dispersants are sulfonated or sulphated soil dispersants having the formula: bis ((C2H5O) (C2H4O) n) (CH3) -N + -CxH2x-N + - (CH3) -bis ((C2H5O) (C2H4O) n) sulphonated or sulphonated wherein n has a value of 20 to 30, and x has a value of 3 to 8. Preferably, the composition comprises at least 1% by weight, or at least 2% by weight, or at least 3% by weight of dispersants of dirt. The detergent composition usually comprises adjuvant components. These detergent adjuvant components include: a bleach such as percarbonate and / or perborate, preferably in combination with a bleach activator such as tetraacetylethylenediamine, oxybenzene sulfonate bleach activators such as nonanoyloxybenzene sulfonate, caprolactam bleach activators, imide bleach activators such as N-nonanoyl-N-methyl imide, preformed percents such as N, N-naphthoylamino peroxycaproic acid, nonilamidoperoxyadipic acid or dibenzoyl peroxide; chelating agents such as diethylenetriamine pentaacetate, diethylene triamine pentamethyl 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, celluloses, laccases, lipases, oxidases, peroxidases and proteases; foam suppressor systems such as silicone-based foam suppressors; brighteners; photo-bleach; cargo salts; fabric softening agents 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 imidazole and epichlorohydrin; dirt dispersants and antiredepositing auxiliaries 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, flakes and combinations 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 above 7 to 11, preferably 8 to 10.5.

Examples Example 1 Composition of aqueous pulp.

Preparation of a spray-dried powder. An aqueous pulp is prepared having the composition described above with a moisture content of 25.89%. The aqueous pulp is heated to 72 ° C and pumped at high pressure (from 5.5x106NpT2 to 6.0x106Nm "2), in a spray-drying towith an air inlet temperature of 270 ° C to 300 ° 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 (>1.8 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 collected in a subsequent containment system in the tower. The spray-dried powder has a moisture content of 1.0% by weight, a bulk density between 425 g / l and a particle size distribution such that 95.2% by weight of the spray-dried powder has a particle size between 150. at 710 microns. The composition of the spray-dried powder is given below.

Composition of spray-dried powder.

Preparation of a cationic detergent surfactant particle. The cationic surfactant particle was obtained on a batch basis of 14.6 k in a Morton FM-50 Loedige equipment. 4.5 k of micronized sodium sulfate and 4.5 k of micronized sodium carbonate were previously mixed in the mixer. 4.6 k of an aqueous solution of monoalkyl monohydroxyethyldimethylammonium chloride of C? 2-? (cationic surfactant) 40% active micronized sodium sulfate and micronized sodium carbonate in the mixer at the same time that the main traction unit and the mechanical selector were operated. After about 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 was added to the mixer as a powdering agent. The resulting agglomerate is collected and dried using a fluidized bed dryer on a 2500 l / min air base at 100-140 ° C for 30 minutes. The resulting powder was sieved and the fraction was collected through 1400 μm as the particle of the cationic surfactant. The composition of the cationic surfactant particle is as follows: 15% w / w monoalkyl monohydroxyethyl dimethyl quaternary ammonium chloride C12-14 40.76% w / w sodium carbonate 40.76% w / w sodium sulfate 3.48 % p / p of humidity and miscellanea Preparation of a particle of the nonionic detergent surfactant. The nonionic detergent surfactant particle was obtained on a 25k batch base using a cement mixer 1m in diameter at 2.51 rad / s (24 rpm). 18.9 k of low density sodium sulphate distributed by Hamm Chemie under the tradename Rombach Leichtsulfat® was added to the mixer and then 6.1 k of ethoxylated alkyl alcohol of C1-15 was sprayed with an average degree of ethoxylation of 7 ( AE7) in liquid form over sodium sulfate at 40 ° C. The mixture was 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: 24.4% w / w of ethoxylated alkyl alcohol of C? 4-? 5 having an average degree of ethoxylation of 7 (AE7) 75.6% w / w of sodium sulfate Preparation of a granular laundry detergent composition in accordance with the present invention. 10.15 k of the spray dried powder of Example 1, 1.80 k of the cationic detergent surfactant particle of Example 1, 2.92 k of the particle of the nonionic detergent surfactant of Example 1, and 10.13 k (total amount) of another material individually added dry were added in the batch concrete mixer of 1 m in diameter operating at 2.51 rad / s (24 rpm). Once all the materials were dosed in the blender, the mixture was blended for 5 minutes to form a granular laundry detergent composition in accordance with the present invention. The formulation of the granular laundry detergent composition according to the present invention is as follows.

A granular laundry detergent composition according to the present invention.

Example 2 Composition of aqueous pulp.

Preparation of a spray-dried powder. An aqueous pulp was prepared having the composition described above and having a moisture content of 29.81%. The aqueous pulp was heated to a temperature of 65 ° C to 80 ° C and pumped at high pressure (from 5.5x106Nrrf2 to 6.0x106Nm "2), in a countercurrent spray drying tower with an air inlet temperature of 270 ° C at 300 ° C. The aqueous pulp is atomized and the atomized pulp dried to produce a solid mixture, which was then cooled and sieved to remove too large material (> 1.8 mm) to form a spray-dried powder, The fine material (<0.15 mm) was sedimented with the exhaust air in the spray-drying tower and collected in a subsequent containment system in the tower.The composition of the resulting spray-dried powder is describe below.

Composition of spray-dried powder Preparation of a nonionic detergent surfactant particle The nonionic detergent surfactant particle was obtained on a 25k batch base using a cement mixer 1m in diameter at 2.51 rad / s (24 rpm). 18.9 k of low density sodium sulfate distributed by Hamm Chemie under the tradename Rombach Leichtsulfat® was added to the mixer and then sprayed 6.1 k of ethoxylated alkyl alcohol of C? -? 5 with an average degree of ethoxylation of 7 (AE7) in liquid form over sodium sulfate at 40 ° C. The mixture was mixed for 3 minutes to produce the non-ionic detergent surfactant particle, which flows freely. The composition of the nonionic detergent surfactant particle is as follows: 24.4% w / w of ethoxylated C14-15 alkyl alcohol having an average degree of ethoxylation of 7 (AE7) 75.6% w / w sodium sulfate Preparation of a cationic detergent surfactant particle. The linear alkyl benzene sulphonate particle was 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 were added to the mixer at the same time that the main traction unit and the mechanical selector were operated. Then 3.46 k of the linear alkyl benzene sulphonate paste (78% by active weight) was added to the mixer and mixed for 2 minutes to produce a mixture. The resulting mixture was collected and dried using a fluidized bed drier on a 2500 l / min of air at 100-140 ° C for 30 minutes to produce the anionic detergent surfactant particle. The composition of the anionic detergent surfactant is as follows: 20% w / w of linear alkylbenzene sulfonate 20% w / w sodium carbonate 58% w / w sodium sulfate 2% w / w miscellaneous and water Preparation a granular laundry detergent composition according to the present invention. 10.15 k of the spray dried powder of Example 2, 2.26 k of the particle of the nonionic detergent surfactant of Example 2, 8.5 k of the particle of the anionic detergent surfactant of Example 2, and 4.09 k (total) of another dry aggregate material. they were dosed in the 1 m diameter batch concrete mixer operating at 2.5 rad / s (24 rpm). Once all the materials were dosed in the blender, the mixture was blended for 5 minutes to form a granular laundry detergent composition in accordance with the present invention. The formulation of the granular laundry detergent composition according to the present invention is as follows.

A granular laundry detergent composition according to the present invention.

Example 3 Example 1 was repeated except that the monoalkyl monohydroxyethyldimethylammonium chloride of Cio replaces the monoalkyl monohydroxyethyldimethylammonium chloride of C12.14 and the monoalkyl monohydroxyethyldimethylammonium chloride of C10 in the agglomerate of cationic detergent surfactant.

Example 4 Example 1 was repeated except that 3.75% by weight of the citric acid composition was added dry, and the amount of the dry added sulfamic acid was reduced from 7.5% to 3.75% by weight of the composition.

Claims (22)

NOVELTY OF THE INVENTION CLAIMS

1. A laundry detergent composition; the composition comprises: (i) Sulfamic acid and / or water soluble salts thereof; and (i) an anionic detergent surfactant; and (iii) from 0 wt% to 8 wt% of a zeolite additive; and (v) from 0 wt% to 8 wt% of a phosphate additive. The composition according to claim 1, further characterized in that the composition comprises from 5% by weight to 14% by weight of an anionic detergent surfactant, from 2% by weight to 8% by weight of a nonionic detergent surfactant and optionally 0.5% by weight to 3% by weight of a cationic detergent surfactant. 3. The composition according to any of the preceding claims, further characterized in that the composition comprises 0% by weight to 4% by weight of a zeolite additive, preferably the composition is free of a deliberately added zeolite additive. 4. The composition according to any of the preceding claims, further characterized in that the composition comprises 0% by weight to 4% by weight of a phosphate additive, preferably the composition is free of a deliberately added phosphate additive. 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. 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. The composition according to any of the preceding claims, further characterized in that the composition comprises from 3% by weight to 10% by weight of sulfamic acid. The composition according to any of the preceding claims, further characterized in that the composition comprises at least 3% by weight of polymeric polycarboxylate. 9. 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 from 8% by weight to 12% by weight of an anionic detergent surfactant, from 2% by weight to 6% by weight of a non-detergent surfactant. ionic and optionally from 1% by weight to 2% by weight of a cationic detergent surfactant. The composition according to any of the preceding claims, further characterized in that the composition comprises less than 4% by weight of a silicate salt, and optionally the composition is free of a silicate salt. The composition according to any of the preceding claims, further characterized in that the sulfamic acid and / or water-soluble salts thereof are in particulate form having a weighted average particle size in the range of 250 μm to 800 μm . 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 particle size distribution such that no more than 35% of the product is present. % by weight of the sulfamic acid and / or the water-soluble salts thereof have a particle size of less than 250 μm and not more than 35% by weight of the sulfamic acid and / or the water-soluble salts thereof have a size of particle greater than 1000 μm. The composition according to any of the preceding claims, further characterized in that the anionic detergent surfactant is selected from the group comprising C10-13 linear alkylbenzene sulfonate.; C12-18 linear or branched, substituted or unsubstituted alkylsulfonate: and a mixture thereof. 15. The composition according to any of the preceding claims, further characterized in that the composition comprises a nonionic detergent surfactant which is an ethoxylated C8-? 8 alkyl alcohol having an ethoxylation degree of 1 to 10. 16. The composition according to any of the preceding claims, further characterized in that the composition comprises a cationic detergent surfactant which is a monoalkyl monohydroxyethyldimethylammonium quaternary chloride. The composition according to any of the preceding claims, further characterized in that the composition comprises at least 10% by weight of a sulfate salt, preferably sodium sulfate. 18. 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. 19. The composition according to any of the preceding claims, further characterized in that the composition is in flowing particulate form. 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 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 that is capable of undergoing an acid / base reaction with an anion carbonate. 21. The use of sodium sulfamate in a laundry detergent composition to provide cleaning performance for the removal of greasy stains. 2

2. A laundry detergent composition comprising sulfamic acid, wherein at least part of, preferably predominantly all, sulfamic acid is in zwitterionic form.