MXPA98001320A - Powder with chlorine blocker for the washing of plates to m - Google Patents

Abstract

The present invention includes dry particulate detergent and bleach compositions comprising: at least about 18% anionic surfactant, from about 1% to about 20% silicate builder, and a chlorine bleach material that provides from about 0.003% to about 4% available chlorine, the present invention also includes methods for cleaning kitchen or eating utensils by washing them by hand in aqueous dispersions of said composition.

Description

POWDER WITH CHLORINE WHITENER FOR THE WASHING OF PLATES ft MANO TECHNICAL FIELD The present invention includes detergent and bleach compositions that are used for hand-washing and eating utensils.

BACKGROUND OF THE INVENTION In many parts of the world, improved products are needed to clean and sanitize cooking and eating utensils. It is an object of the present invention to provide dry particulate detergent and bleach compositions for hand washing and sanitizing kitchen utensils and eating utensils. An object of the present invention is also to provide methods for cleaning and / or sanitizing kitchen utensils and for eating by washing them in said compositions.

BRIEF DESCRIPTION OF THE INVENTION The present invention relates to dry particulate detergent and bleach compositions comprising: (a) at least about 18% anionic surfactant; (b) from about 1% to about 20% silicate builder; and (c) a chlorine bleach material that provides from about 0.003% to about 4% available chlorine.

DETAILED DESCRIPTION OF THE INVENTION The present invention includes dry detergent and bleach compositions in particles. The "dry particulate" compositions are not necessarily free of moisture, but are flowing granular or powdery products that are essentially dry to the touch. The materials incorporated in the detergent and bleaching compositions of the present invention include those indicated below. Unless otherwise specified, all percentages are on a weight basis. As used in the present invention, "alkyl" means hydrocarbyl portions that are straight or branched, saturated and unsaturated, with one or more double bonds. As used in the present invention, "alkanyl" means saturated alkyl and "alkenyl" means unsaturated alkyl with double bonds. The alkyl may be of individual or mixed lengths, and these lengths are often mixed lengths and saturation derived from natural sources such as tallow, coconut oil, palm oil, etc.

Anionic surfactants The compositions of the present invention comprise at least about 18% anionic surfactant, preferably from about 20% to about 40%, more preferably from about 22% to about 36%, more preferably still from about 24% to about 32%, still more preferably from about 26% to about 30%. Preferred anionic surfactant materials useful in the present compositions include the water-soluble salts, preferably the alkali metal salts, ammonium salts and alkylammonium salts, of organic sulfuric acid reaction products having in their molecular structure an alkyl group which it contains from about 8 to about 24 carbon atoms and an ester group of sulfonic acid or sulfuric acid. (Included in the term "alkyl" is the alkyl portion of acyl groups). Examples of such anionic surfactants are the salts of compatible cations, for example sodium, potassium, ammonium, onoethanolammonium, diethanolammonium and triethanolammonium, with alkyl sulfates, alkylbenzene or alkyltoluene sulfonates, ethoxylated alkyl sulfates, and other surfactant anions described later. Preferred alkylbenzene and alkyl toluenesulfonates include those with an alkyl portion which is straight chain or branched chain preferably having from about 8 to about 18 carbon atoms, more preferably from about 10 to about 16 carbon atoms. The alkyl chains of the alkylbenzene and alkyl toluene sulfonates preferably have an average chain length of about 11 to about 14 carbon atoms. Alkylbenzenesulfonates are preferred. The alkylbenzene sulfonate including branched chain alkyl is referred to as ABS. Alkylbenzenesulfonate which is all straight chain is preferred because it is more biodegradable; it is called LAS and is the preferred anionic surfactant. Alkylbenzenesulfonic acids useful as precursors for these surfactants include decylbenzenesulfonic acid, undecylbenzenesulfonic acid, dodecylbenzenesulfonic acid, tridecylbenzenesulfonic acid, tetrapropylenebenzenesulfonic acid, and mixtures thereof. Preferred sulfonic acids as precursors of the alkylbenzene sulfonates useful for the compositions of the present invention are those in which the alkyl chain is linear and averages from about 11 to about 13 carbon atoms in length. Suitable cations for said alkylbenzene sulfonates include the alkali metals (lithium, sodium and potassium), ammonium and / or alkanolammonium; preferred are potassium and especially sodium. Preferred alkyl sulfates include those with an alkyl portion that is straight chain or branched chain, preferably having from about 8 to about 24 carbon atoms, more preferably from about 10 to about 20 carbon atoms, more preferably still from about 12 to about 18 carbon atoms. The alkyl chains of the alkyl sulfates preferably have an average chain length of about 14 to about 16 carbon atoms. The alkyl chains are preferably linear. The alkyl sulfates are typically obtained by sulfating fatty alcohols which are produced by reducing the glycerides of fats and / or oils from natural sources, especially from tallow or coconut oil. Preferred alkyl sulfates include lauryl sulfates, stearyl sulfates, palmityl sulfates, decyl sulfates, myristyl sulphates, tallow alkyl sulfates, coco alkyl sulfates, C12-C15 alkyl sulfates, and mixtures of these surfactants. Preferred cations for the alkyl sulfates include sodium, potassium, ammonium, monoethanolammonium, diethanolammonium and triethanolammonium; more preferred is sodium. Other preferred anionic surfactants include alkyl polyethoxylated sulfates having the formula R0 (C2H "0)? S03f1, wherein R is alkanyl or alkenyl having from about 10 to about 20 carbon atoms, preferably from about 12 to about 16 or 18; X is from about a to about 20 on average, preferably from about 1 to about 10, more preferably from about 2 to about 6; and M is a compatible water-soluble cation, such as those described above. The alkyl polyethoxylated sulfates useful in the present invention are typically condensation products of ethylene oxide and monohydric alcohols having from about 10 to about 20 carbon atoms. The alcohols can be derived from natural fats, for example, coconut oil or tallow, or they can be synthetic. Preferred cations of said surfactants are potassium, and especially sodium. Specific examples of alkyl polyethoxylated sulfates include alkyl polyethoxylated ether sulfate (3) of coconut sodium, alkyl polyethoxylated ether sulfate (3) of sodium C12-Cis, alkyl polyethoxylated ether sulfate (6) of tallow sodium, and alkyl polyethoxylated ether sulfate (1) of C12 -C13 potassium Anionic surfactants include water-soluble salts of higher fatty acids, or "soaps". These include alkali metal soaps, such as the sodium, potassium, ammonium and alkylolammonium salts of higher fatty acids containing from about 8 to about 24 carbon atoms, preferably from about 12 to about 18 carbon atoms. Other anionic surfactants useful in the compositions of the present invention include sodium alkyl glyceryl ether sulfonates, especially those ethers of higher alcohols derived from tallow and coconut oil; sulfonates and monoglyceryl sulphates of fatty acid of coconut-sodium oil; sodium or potassium salts of ethylene alkylphenol ether sulphates containing from about 1 to about 12 ethylene oxide units per molecule, and wherein the alkyl group contains from about 8 to about 12 carbon atoms; and secondary alcohol sulfates containing from about 14 to about 18 carbon atoms. Other anionic surfactants useful in the compositions of the present invention include water-soluble salts of esters of α-sulfonated fatty acids containing from about 8 to about 20 carbon atoms in the fatty acid group, and from about 1 to about 10. carbon atoms in the ester group; water-soluble salts of 2-acyloxyalkane-1-sulfonic acids containing from about 2 to about 9 carbon atoms in the acyl group, and from about 9 to about 23 carbon atoms in the alkane portion; water-soluble salts of olefin- and paraffin sulfonates containing from about 10 to about 20 carbon atoms; β-alkoxyalkanesulfonates, which contain from about 1 to about 3 carbon atoms in the alkyl group, and from 8 to about 20 carbon atoms in the alkane portion; polyethylene oxide alkylphenol ether sulfates, containing on average from about 1 to about 10 ethylene oxide units per molecule, wherein the alkyl radicals contain from about 8 to about 12 carbon atoms; the reaction products of fatty acids esterified with isethionic acid, wherein the fatty acids are derived from natural or synthetic sources; fatty acid amides of a methyl tauride, in which the fatty acids are derived from natural or synthetic sources; and 3-acetoxy- or β-acetamido-alkane sulphonates, wherein the alkane has from about 8 to about 22 carbon atoms.

Silicate detergency builder The compositions of the present invention comprise from about 1% to about 20% silicate builder, preferably from about 3% to about 17%, more preferably from about 5% to about 15%. The silicate detergent builder materials are water-soluble silicates that are a mixture of SiO2 and M2 (= Na or K), having a Si? 2: ft2? Ratio. from about 1: 1 to about 3.6: 1, preferably from about 1.4: 1 to about 3.2: 1, more preferably from about 1.6: 1 to about 2.6: 1. Said silicates help to provide the desired range for the present products in use.

Chlorine bleach The compositions of the present invention contain a chlorine bleach material that provides from about 0.003% to about 4% available chlorine based on the weight of the composition, preferably from about 0.01% to about 2%, more preferably from about 0.05% to about 1%, more preferably still about 0.1% to about 0.5%. Methods for determining "available chlorine" of compositions incorporating chlorine bleach materials are well known in the art. The available chlorine is the chlorine that can be released by acidification of an aqueous solution of hypochlorite ions (or a material that can form hypochlorite ions in aqueous solution), and at least a molar equivalent amount of chloride ions. Numerous materials are known to provide available chlorine. A conventional analytical method for determining available chlorine is by the addition of an excess of iodide salt and titration of the free iodine released with a reducing agent, such as sodium thiosulfate. Samples of the compositions of the present invention are typically dissolved in a water-chloroform mixture to extract all organic interference material, before performing the analysis for available chlorine. An aqueous solution containing about 1% of the present composition is used to determine the available chlorine of the composition. Many chlorine bleach materials are known, such as those described in Mizuno, W.G., "Dishwashing", Detergency: Theorv and Test Methods. Surfactant Science Series, Volume 5, Part III, pages 872-878. Chlorine bleach materials useful in the compositions of the present invention include alkali metal hypochlorites, hypochlorite addition products and N-chlorine products which usually contain an organic radical. The N-chloro compounds are usually characterized by a double bond at the atom adjacent to a trivalent nitrogen, and a (C1 +) chlorine attached to the nitrogen that is easily exchanged with H + or M + (where M + is a common metal ion such as Na +, K +, etc.), to release H0C1 or 0C1- by hydrolysis. Preferred alkali metal hypochlorite compounds useful in the present compositions include sodium hypochlorite, potassium hypochlorite, and lithium hypochlorite. Although known as chlorine bleach materials, alkaline earth metal hypochlorites, such as calcium hypochlorite and magnesium hypochlorite, are not preferred for the present compositions because of the poor compatibility of the alkaline earth metal cations with the anionic surfactants. A preferred hypochlorite addition product useful in the present compositions is chlorinated trisodium phosphate, which is a double hydrated crystalline salt of trisodium phosphate and sodium hypochlorite and which is prepared by crystallization from an aqueous mixture of sodium hypochlorite, caustic soda, trisodium phosphate and disodium phosphate. Chlorinated trisodium phosphate typically exists commercially as chlorinated trisodium phosphate dodecahydrate. Examples of N-chloro compounds useful as chlorine bleach materials in the present compositions include trichloroisocyanuric acid, dichloroisocyanuric acid, monochloroisocyanuric acid, 1,3-dichloro-5,5-dimethylhydantoin, l-chloro-5,5-dimethylhydantoin, N-chlorosuccinimide, N-chlorosulfamate, N-chloro-p-nitroacetanilide, N-chloro-o -nitroacetanilide, N-chloro-m-nitroacetanilide, Nm-dichloroacetanilide, Np-dichloroacetanilide, Dicloramine-T, N-chloropropionanilide, N-chlorobutyl ranilide, N-chloroacetanilide, No-dichloroacetanilide, N-chloro-p-acetotoluide, N- chloro-m-acetotoluide, N-chloroformanilide, N-chloro-o-acetotoluide, Chloramine-T, ammonia monochloramine, albu inoid chloramines, N-chlorosulfamide, Chloramine B, Dicloramine B, di-halogen (bromochlorodi ethylhydantoin), N, N'-dichlorobenzoylenurea, p-toluenesulfodichloroamide, trichloro-elamine, N-chloroamelin, N, N'-dichloroazodicarbonamide, N-chloroacetylurea, N, N'-dichlorobiuret, ida chlorinated dicyand, and alkali metal salts of the above acids, and stable hydrates of the above compounds. Particularly preferred chlorine bleach materials in the present compositions are the chloroisocyanuric acids and the alkali metal salts thereof, preferably potassium salts, and especially sodium salts thereof. Examples of such compounds include trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloroisocyanurate, potassium dichloroisocyanurate, and trichloro-potassium dichloroisocyanurate complex. The most preferred chlorine bleach material is sodium dicloisocyanurate; the dihydrated salt of this material is particularly preferred because of its excellent stability.

Optional ingredients Optional ingredients that can be incorporated into the compositions of the present invention include, but are not limited to, the following: the compositions of the present invention preferably comprise at least about 1% phosphorus-containing builder, preferably about 100%. 2% to about 40%, more preferably from about 3% to about 20%, more preferably still from about 5% to about 12%. Preferred phosphorus-containing builder materials are inorganic phosphate, pyrophosphate or materials of polyphosphate having the ability to remove metal ions apart from alkali metal ions from washing solutions by sequestration, including reactions by chelation or by precipitation. Preferred builders containing phosphorus include trisodium phosphate, tetrasodium pyrophosphate, sodium tripolyphosphate and sodium hexametaphosphate; Sodium tripolyphosphate is the most preferred phosphorus-containing builder. The compositions of the present invention preferably comprise, as an optional builder, from 0% to about 30% alkali metal carbonate, preferably sodium carbonate, preferably from about 5% to about 20%. The compositions of the present invention comprise from 0% to about 60% fillers such as sodium sulfate, sodium chloride, sucrose, sucrose esters, etc., preferably from about 10% to about 50%, more preferably from around 20% to approximately 40%. The preferred filler material is sodium sulfate. The compositions of the present invention comprise from 0% to about 2% anti-redeposition materials such as carboxymethylcellulose, polyethylene glycol, polyvinylpyrrolidone, polyvinyl alcohols, etc., preferably from about 0.5% to about 1%. Carboxymethylcellulose is the preferred antiredeposition material.

The compositions of the present invention comprise from 0% to about 5% minor ingredients including, but not limited to, brighteners, perfumes, colorants, etc., preferably from about 0.5% to about 2%. The compositions of the present invention comprise from 0% to about 10% moisture, preferably from about 1% to about 8%, more preferably from about 3% to about 7%.

Procedures The particulate dry compositions of the present invention can be obtained by various methods including dry mixing of the particulate ingredients, and the addition of liquid ingredients by spraying and mixing. Preferred processes for obtaining the present compositions are well-known processes for obtaining spray-dried detergent products. Typically, the surfactant is mixed with detergency builders, fillers, other non-volatile and non-heat sensitive components, and sufficient water to form a suspension that is spray dried using a standard tower operation. To the dry particulate product thus obtained, the chlorine bleach material and minor ingredients are added by dry mixing, spraying, or a combination thereof. Other preferred methods for obtaining the present compositions are processes for obtaining agglomerated materials in various mixers. Suitable mixers include high shear and high speed shear mixers, such as the Loedige CB *, the Shugi Granulator * and the Drais K-TTPR, and moderate speed mixers that include grate mixers, such as the Loedige KMR and the Drais K-TR. The dry components of the present compositions are fed to said mixers and intimately mixed. The liquid components can be sprayed into said mixers and mixed with the dry components therein, or they can be sprayed onto the mixes after they are discharged from the mixer, preferably with an additional mixing step.

EXAMPLES The following non-limiting examples exemplify the compositions of the present invention.

EXAMPLE 1 EXAMPLE 2 EXAMPLE 3 EXAMPLE 4 EXAMPLE 5 EXAMPLE 6 EXAMPLE 7 EXAMPLE 8 EXAMPLE 9 The present invention also includes methods for cleaning cooking or eating utensils by washing them by hand in an aqueous solution or dispersion of the above compositions. Preferred solutions or dispersions of the present compositions for cleaning cooking or eating utensils are water-based compositions comprising from about 1% to about 8%, preferably from about 2% to about 6%, of those present compositions, as well as water for the balance. Although particular embodiments of the present invention have been described, it will be obvious to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope thereof. It is intended to cover, in the appended claims, all modifications that are within the scope of this invention.

Claims (7)

NOVELTY OF THE INVENTION CLAIMS 1. - A dry particulate detergent and bleach composition comprising: (a) at least about 18% anionic surfactant; (b) from about 1% to about 20% silicate builder; and (c) a chlorine bleach material that provides from about 0.003% to about 4% available chlorine. 2. The composition of claim 1, characterized in that the chlorine bleach material provides from about 0.05% to about 2% available chlorine and is selected from the group consisting of alkali metal hypochlorites, hypochlorite addition products and N-chloro compounds. 3. The composition of claim 2, characterized in that the composition comprises from about 22% to about 40% anionic surfactant, the surfactant comprising a surfactant selected from the group consisting of alkylbenzene sulfonates, alkyl sulfates and alkyl polyethoxylated sulfates. 4. The composition of claim 3, characterized in that the composition comprises from about 3% to about 17% silicate builder having a ratio of Si? 2: Na2? around

1. 4: 1 to about 3.2: 1. 5. The composition of claim 4, characterized in that the composition comprises from about 24% to about 32% anionic surfactant, the surfactant comprising alkylbenzene sulfonates. 6. The composition of claim 4, characterized in that the chlorine bleach material is an alkali metal hypochlorite or a hypochlorite addition product. 7. The composition of claim 4, characterized in that the chlorine bleach material is an N-chloro compound. 8. The composition of claim 7, characterized in that the N-chloro compound is a chloroisocyanuric acid or an alkali metal salt thereof. 9. The composition of claim 1, characterized in that the composition comprises at least about 1% phosphorus-containing builder. 10. The composition of claim 4, characterized in that the composition comprises from about 2% to about 40% phosphorus-containing builder and is selected from the group consisting of trisodium phosphate, tetrasodium pyrophosphate, sodium tripolyphosphate. and sodium hexametaphosphate. 11. The composition of claim 8, characterized in that the composition comprises from about 3% to about 20% phosphorus-containing builder, which is tetrasodium pyrophosphate or sodium tripolyphosphate, and because it contains about 5%. % to about 15% silicate builder having an SiO ratio; > : Na2? from about 1.6: 1 to about 2.6: 1. 1

2. The composition of claim 4, characterized in that the composition comprises from about 26% to about 32% anionic surfactant. 1

3. The composition of claim 11, characterized in that the composition comprises from about 26% to about 32% anionic surfactant. 1

4. The composition of claim 7, characterized in that the anionic surfactant consists essentially of LAS. 1

5. The composition of claim 13, characterized in that the anionic surfactant consists essentially of LAS, the phosphorus-containing detergency builder consists essentially of sodium tripolyphosphate, and the chlorine bleach material consists essentially of sodium dichloroisocyanurate. 1

6. The composition of claim 4, characterized in that the chlorine bleach material consists essentially of sodium dichloroisocyanurate. 1

7. A method for cleaning kitchen utensils or for eating by washing them by hand in an aqueous dispersion of the composition of claim 1, 7, 11 or 15.