JPH05507745A - Granular laundry detergent composition containing a chlorine scavenger - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Granular laundry detergent composition technology containing chlorine scavenger The present invention relates to low pH granular laundry detergent compositions. A preferred composition of the invention is , a small amount of a chlorine scavenger, preferably an ammonium salt. The composition is highly washable. Fabrics sensitive to small amounts of chlorine present in purified water p)l and in wash and rinse waters Minimize fading of fabric color. Other preferred compositions of the invention include certain aluminum Dense low phosphate containing nosilicate/citric acid/carbonate builder system or phosphate-free detergent. These compositions must maintain good physical properties. However, it gives good leaning performance.

Background technique Granular laundry detergents are typically formulated to provide a wash water pH of about 9.8 to 10.5. It is prescribed. This I)H range is limited to some fabric dyes after many wash cycles. May cause discoloration. When diluting the cleaning solution into the rinse water, pn is slightly Fabric dyes are generally less sensitive to pH down to the range of about 7-9.

Chlorine is used in many parts of the world to purify water. water is safe In order to be sure that pm) of chlorine remains in the water. Even this small amount of chlorine will cause fading of chlorine-sensitive fabric dyes. It was found that there are some cases. Typical wash water usually contains residual chlorine and There is sufficient soil on the fabric to minimize damage to the chlorine-sensitive dyes.

However, the amount of dirt in the rinse water decreases significantly as the pH decreases. and chlorine-sensitive dyes can fade after numerous wash cycles. Also , chlorine is more aggressive to dyes at lower pH. Thus, the fabric strength over time Color fading is due to the high pH of typical granular laundry detergents and the wash and rinse water. This is both a result of the presence of residual chlorine in the

Good cleaning performance can be obtained from low phosphate or no phosphate detergent detergents. Drilling is difficult due to limitations in conventional spray drying methods. additionally, a large amount Trying to compensate with the active ingredients (surfactants and builders) of the product physical properties ( limited without significantly reducing solubility, clumping/caking, skimability) .

Demonstration of invention The present invention (a) an effective amount of a chlorine scavenger; and (b) essentially anionic surfactants, nonionic surfactants, zwitterionic surfactants, amphoteric surfactants; Surfactants and cationic surfactants, detergent builders, inert substances, detergent supplements. auxiliaries, and mixtures thereof; A granular laundry detergent composition containing essentially no additives (the composition is dissolved in water at 20°C). having a pH of about 7 to about 9.3 at a concentration of 1% by weight.

The chlorine scavenger in this composition is useful in controlling residual chlorine in wash and rinse waters. used in effective amounts. The amount of chlorine scavenger required will vary, but Destroying hypochlorite bleach may be added carefully to treat sensitive stains. Only small amounts are used to avoid

BEST MODE FOR CARRYING OUT THE INVENTION The granular laundry detergent composition of the present invention includes a chlorine scavenger and a detergent additive. The composition is , from about 7 to about 9.3, preferably from about 8 to about 9.1 at a concentration of 1% by weight in water at 20°C. , more preferably formulated to provide a pH of about 8.5 to about 9.0. This composition The individual components of are detailed below.

Chlorine scavenger Chlorine scavengers should not be used in large excess. Because they remove stains. will interfere with normal hypochlorite bleaches added to wash water for whitening and whitening. It is from. The amount ranges from about 0.5 to about 2.5 per rinse on average [111, typically is about 0.01% to the equivalent molar amount to react with about 1 ppm of available chlorine. about 10%, preferably about 0.05% to about 5%, most preferably about 0.08 to about 2 Should be %. Both the cation and anion of the scavenger should not react with chlorine. (preferably two), the amount is adjusted to react with an equivalent amount of available chlorine. .

Suitable chlorine scavengers include four groups according to their structural configuration: polyethyleneimine, polyethyleneimine, The following can be divided into amine, polyamine amide and polyacrylamide polymers, among which polyethyleneimine, polyamine and polyamine Minamide is particularly preferred.

Suitable polyethyleneimines are obtained by acid-catalyzed polymerization of ethyleneimine and Can be modified with urea and epichlorohydrin or dichloroethane. Poly Ethyleneimine has primary, secondary or tertiary amino groups as well as quaternary ammonium It can contain a um group. Aqueous solutions of polyethyleneimine exhibit basic reactions. molecule The amount can be up to about 1,000,000.

Polyamines are chemical compounds that have several groups that can react with polyvalent aliphatic amines. addition formation from compounds such as epichlorohydrin or alkylene civalides. compound or condensate. Therefore, they always contain several secondary, It also contains tertiary or quaternary nitrogen atoms and eventually hydroxyl groups. Therefore, Since they do not contain large hydrophobic groups in their molecules, they behave as polyelectrolytes and It is a hydrophilic polar compound that is water-soluble.

Polyamines exhibit basic reactions in aqueous solutions. Suitable compounds include, for example, It is described in the specification of Japanese Patent No. 2,969,302.

Polyamine amide simultaneously contains an amino group and an amide group in its molecule. those For example, a polybasic acid, such as a dibasic saturated aliphatic 03-C8 acid, and a polyacrylic acid. Compounds containing several groups capable of reacting with amine, such as epichlor Produced by condensation with hydrin.

These compounds also exhibit basic reactions in aqueous solutions. Suitable polyamine amides are: For example, it is described in US Pat. No. 2,926.154.

Polyacrylamide with amino groups and molecular weight up to several hundred blades is used here It is suitable for For example, carboxyl groups produced by partial hydrolysis By incorporating anionic polyacrylamide, in addition to amide groups, On the other hand, polyacrylamide containing amino groups undergoes basic reaction in aqueous solution. shows. Amino groups are, for example, alkali and hypobromite or hypochlorite It can be introduced by reaction with

It is common to all polymers that they are water soluble. Such polymers are It is a product. Compounds that are particularly well suited as inserts in detergents in accordance with the findings are These are polyethyleneimines and polyamines that exhibit strong basic reactions. particularly suitable An example of a commercially available polyethyleneimine that is Epomin SP-003J, “Lugalban” from BASF lvan) G20 and G35J, and “Ethylene Amine E-100J. These polymers can be used alone or with melamine or urea. and water-soluble polymers from formaldehyde. discovery Other polymers suitable for detergents that meet the water-soluble polymers based on melamine or urea and formaldehyde These are r　Encyclopedia　ofPolyIIler 5science and TechnologyJ, Joan Willie & Sons Incorporated, New York, 1968, Vol. 9 ．． It is described in p. 762.

By combining these polymers with polymers containing amino groups and/or amide groups, Addition to detergents consistent with the findings results in an enhanced dye protection effect.

Preferred polymers for use in preferred anionic surfactant-containing compositions of the invention is polyethyleneimine. Polyethyleneimine is adsorbed to cotton fibers, so , is believed to be a particularly efficient chlorine scavenger. Anionic surfactant matrix In the process, ion pairs between amines and surfactants or polymeric carboxylates are used. tends to dramatically reduce the solubility of polymeric amines. Polymer amine complex Solubility can be maintained by utilizing relatively low molecular weight materials. Predetermined a The molecular weight of the amine polymer is preferably selected to achieve fabric adhesion of at least 50%. should be controlled to ensure that Low adhesion allows efficient carryover into rinse water would not be possible.

Preferred polyethyleneimines have a molecular weight of about 800 or less, more preferably about 200 ~ has about 400.

The positive charge and solubility of the polymeric amine allows for the deposition of the polymer onto cotton fabrics. . The affinity that the polymer has for fabrics decreases as the pH decreases or the molecular weight increases. It increases over time. Thus, these properties (solubility, solution pH, and polymer molecule The balance of chlorine scavenger on the fabric and in solution controls the efficiency of the chlorine scavenger on the fabric and in solution. optimal The composition can be applied on fabrics (for carryover from wash water to rinse water) and Allowing balance of polymer in solution (for efficiency of reaction rate with chlorine) Probably.

Other chlorine scavengers of the present invention include sulfides, bisulfides, thiosulfides. Reducing substances such as carbon dioxide, thiosulfates, iodides, nitrides and carbame selected from the group consisting of antioxidants such as salts, ascorbates, and mixtures thereof. It is an anion that is exposed. sulfate, pi sulfate, carbonate, pi Carbonates, nitrates, chlorides, borates, phosphates, condensed phosphates Acetate, acetate, benzoate, citrate, formate, lactate, salt Common non-chlorine scavenging anions such as richlate and their mixtures Can be used in combination with Um cation.

Other chlorine scavengers useful herein include ammonium sulfate (preferred); Low volatility primary and secondary amines such as ethanolamine, amino acids and and their salts, polyamino acids and their salts, fatty amines, glucose amines and other aminated sugars. A specific example is tris(hydroxy) Methyl) aminomethane, monoethanolamine, jetanolamine, Sarcosi Glycine, iminodiacetic acid, lysine, ethylenediaminediacetic acid, 2,2,6. 6-titramethylbiverinol, and 2,2,6,6-titramethylbivelino Examples include:

Other chlorine scavengers include phenol, phenolsulfonate, and 2,2-bifluoride. phenol, thiron, and t-butylhydroquinone. resorcinault resorcinol monoacetate, 2,4-dihydroxybenzoic acid, 3,5- m-polyphs such as dihydroxybenzoic acid and 2,4-dihydroxyacetophenone Preferably phenols.

Peroxide bleach sources, e.g. berborate, bercarbonate and other persalts is also used here in trace amounts (less than 3% by weight, preferably less than about 2%) as a chlorine scavenger. Can be used. However, peroxide can be rinsed without the risk of bleach damage to the color. Because it cannot be used in large enough quantities to carry over into the water supply, efficient Not a chlorine scavenger.

Detergent compositions containing a chlorine scavenger and a detergent component (various ratios and amounts of these two substances) and percentage) can be provided. Of course, the amount of chlorine scavenger will vary depending on the prescriber. This can vary depending on the amount of residual chlorine expected. Additionally, the amount of detergent ingredients can be adjusted as desired. Provide either heavy duty or light duty products depending on You can change as you see fit. The present invention primarily incorporates an additional component that is a chlorine scavenger. The present invention relates to detergent compositions containing no additives. For example, other substances present in the cleaning solution No substantial additional amount of ammonium cation should be provided.

detergent additives The amount of the detergent surfactant component can vary over a wide range depending on the user's desires, as described above. It can change. Generally, the composition includes a detergent surfactant (preferably an anionic surfactant). active agent) from about 5 to about 50% by weight, preferably from about 10 to about 30% by weight.

The detergent compositions of the present invention contain all types of organic water-soluble detergent surfactant compounds. can. A typical list of types and species of detergent compounds useful herein is provided by U.S. Pat. 3°664.961 (herein incorporated by reference).

The list below of detergent compounds and mixtures that can be used in this composition is a list of substitutes for such substances. represents, but does not attempt to limit.

Water-soluble salts of higher fatty acids, or "soaps", are useful as detergent ingredients in the present compositions. Ru. Detergents of this type include common alkali metal soaps, such as carbon atoms of about 8 to about 24, preferably sodium salt of higher fatty acid having about 10 to about 20 carbon atoms, potassium Salt is an example. Soaps are produced by direct saponification of fats and oils or by neutralization of free fatty acids. more can be generated. Sodium salt of a mixture of fatty acids derived from coconut oil and tallow and potassium salts, i.e., sodium or potassium tallow soap and coco Tutu soap is particularly useful.

Another type of detergent has an alkyl group of about 8 to about 22 carbon atoms in its molecular structure; Aqueous solution of organic sulfuric acid reaction product having sulfonic acid ester group or sulfuric acid ester group salts, especially alkali metal salts (the term "alkyl" refers to the acyl group alkyl moieties). Of this group forming part of the detergent composition of the invention Examples of synthetic detergents are sodium alkyl sulfates and potassium alkyl sulfates, especially Higher alcohol produced by reducing the glycerides of raw or coconut oil (C-018 carbon atom) obtained by sulfating: and alkyl Alkylben having about 9 to about 15 carbon atoms in a straight or branched chain configuration sodium zenesulfonate and potassium alkylbenzenesulfonate, e.g. , U.S. Patent Nos. 2,220,099 and 2°477.383. (incorporated here as a reference). The average number of alkyl groups is Linear linear alkylbenzene sulfonates (abbreviated as Cl2) of about 12 carbon atoms LAS) is particularly valuable.

Other anionic detergent surfactant compounds of the invention include alkyl glyceryl ethers. Sodium Tersulfonate, especially higher alcohols derived from tallow and coconut oil Ether of; sodium coconut fatty acid monoglyceride sulfonate and coconut oil fatty acid monoglyceride sodium sulfate; and about 1 to about 10 units of fatty acid monoglyceride per molecule; alkyl containing tyrene oxide and having an alkyl group of about 8 to about 13 carbon atoms; Sodium or potassium salt of lukylphenol ethylene oxide ether sulfate Salt is an example.

Water-soluble nonionic synthetic detergent surfactants are also useful as detergent components of the present compositions.

Such non-ionic detergent substances have ethylene oxide groups (hydrophilic in nature) and fatty in nature. produced by condensation with organic hydrophobic compounds which may be group- or alkyl-aromatic It can be broadly defined as a compound that Polyoxyethylene condensed with specific hydrophobic groups The length of the group determines the desired balance between hydrophilic and hydrophobic elements. can be easily adjusted to produce water-soluble compounds with

For example, a well-known type of non-ionic synthetic detergent is available under the trade name "Pluronic". nfc) J. These compounds contain propylene oxide and propylene oxide. The hydrophobic base produced by condensation with pyrene glycol and ethylene oxide Produced by condensation. Other suitable nonionic synthetic detergents include alkaline polyethylene oxide condensates of phenols, e.g. in linear or branched configurations. Any alkyl group having an alkyl group having about 6 to about 13 carbon atoms Condensation product of alcohol and ethylene oxide (the ethylene oxide is an alkylphenol) present in an amount equivalent to about 4 to about 15 moles of ethylene oxide per mole of ethylene oxide) can be mentioned.

Aliphatic alkali having about 8 to about 22 carbon atoms in either a straight chain or branched configuration Water-soluble condensates of coal and ethylene oxide, such as coconut alcohol ( The coconut alcohol fraction has about 10 to about 14 carbon atoms) per mole. Coconut alcohol with about 3 to about 30 moles of ethylene oxide - ethylene Oxide condensates are also useful nonionic detergents of the present invention.

As a semipolar nonionic detergent surfactant, an alkyl moiety having 10 to 20 carbon atoms 1 or a group consisting of alkyl groups and hydroxyalkyl groups having from 1 to about 3 carbon atoms. A water-soluble amine oxide containing two moieties selected from: one alkyl moiety and alkyl and hydroxyalkyl groups having from 1 to about 3 carbon atoms A water-soluble phosphine oxyto detergent containing a moiety 2111 selected from the group consisting of ; and one alkyl or hydroxyalkyl moiety of about 10 to about 20 carbon atoms; and alkyl and hydroxyalkyl moieties having from 1 to about 3 carbon atoms. Examples include water-soluble sulfoxide detergents containing one moiety that is exposed.

As amphoteric detergent surfactants, the aliphatic moiety can be linear or branched; one of the aliphatic substituents has about 8 to about 18 carbon atoms and at least one aliphatic substituent has about 8 to about 18 carbon atoms; Induction of aliphatic secondary and tertiary amines whose aliphatic substituents contain anionic water-solubilizing groups. Included are aliphatic derivatives of conductors or heterocyclic secondary and tertiary amines.

As a zwitterionic detergent surfactant, the aliphatic moiety can be linear or branched; one of the aliphatic substituents has about 8 to about 18 carbon atoms and one is anionic and water soluble; Aliphatic quaternary ammonium, phosphonium and sulfonium containing groups Examples include derivatives of compounds. The quaternary compound itself, e.g. cetyltrimethylan Monium bromide can also be used here.

Other detergent surfactant compounds useful herein include from about 6 to about 20 fatty acid groups. of carbon atoms and having from 1 to about 10 carbon atoms in the ester group; water-soluble salts of phonated fatty acid esters; having about 2 to about 9 carbon atoms in the acyl group; and 2-acyloxy-alkyl having from 9 to about 20 carbon atoms in the alkane moiety Water-soluble salts of can-1-sulfonic acid; about 10 to about 20 carbon atoms in the alkyl group and having about 1 to about 12 moles of ethylene oxide water-soluble salts of olefin sulfonic acids having about 12 to 20 carbon atoms; and about 1 to 3 carbon atoms in the alkyl group and about 8 to 3 carbon atoms in the alkane moiety. β-alkyloxyalkanesulfonates having 20 carbon atoms are mentioned. Ru.

Preferred water-soluble organic detergent compounds include about 11 to about 13 alkyl groups. Linear acetate with 10 carbon atoms; C alkyl glyceryl sulfonate: 10 ~IB C1o-18 alkyl ether sulfates, especially those in which the alkyl moiety is about 14-18 carbon atoms and the average degree of ethoxylation is 1 to 6; C1o to 18 atom alkyldimethylamine oxide, especially where the alkyl group has about 11 to 16 carbon atoms. with; alkyldimethylammoniopropanesulfonate and alkyl Dimethylammoniohydroxypropane sulfonate (alkyl in both types) radicals having 14 to 18 carbon atoms): soaps as mentioned above; and C fatty alkaline Coal and ethylene oxide 10-18 Examples include condensates with about 3 to about 15 moles of Cyto.

Particular detergents preferred for use herein include linear C alkyl benzene sulfur Sodium phonate; 10-13 C12-18 alkyl sodium sulfate; C12-18 alcohol and ethylene oxide Sodium salt of sulfated condensate with about 1 to about 3 moles of C1o-18 fatty alcohol a condensate of alcohol and about 4 to about 10 moles of ethylene oxide; and about 10 to about 10 carbon atoms; Water-soluble sodium and potassium salts of 18 higher fatty acids are mentioned.

It is acknowledged that any of the foregoing may be used herein separately or as a mixture. You should be aware of this. Examples of detergent mixtures preferred herein are as follows.

Particularly preferred alkyl ether sulfate detergent components of the present compositions include alkyl ether sulfate detergent components. - a mixture of carbon atoms of about 12 to 16 carbon atoms, preferably preferably an average (arithmetic average) carbon chain length in the range of about 14 to 15 carbon atoms; and about 1 to 4 moles of ethylene oxide, preferably about 1 to 3 moles of ethylene oxide. average (arithmetic mean) degree of ethoxylation].

In addition to detergent surfactants, the detergent compositions of the present invention contain water-soluble or water-insoluble builders. - for example, those commonly taught for use in detergent compositions. mosquito These auxiliary builders sequester hardness ions and adjust the pH of the wash liquor. It can be used to help people develop their skills. Such builders may from about 5% to about 95% by weight of the detergent composition, preferably to provide pH control functions. can be used at concentrations of about 10 to about 50% by weight.

As the builder of the present invention, both conventional inorganic and organic water-soluble builder salts can be used. Can be mentioned.

Such builders include, for example, water-soluble salts of phosphoric acid, such as tripolyphosphate, vinyl Lophosphates, orthophosphates, higher polyphosphates, carbonates, silicates, and It can be a polycarboxylic acid salt. Specific preferences for inorganic phosphate builders Preferred examples include sodium and potassium tripolyphosphates and pylori Examples include phosphate salts.

Phosphorus-free materials may also be selected for use herein as builders.

Specific examples of phosphorus-free inorganic detergent builder ingredients include water-soluble inorganic carbonates and bicarbonates. , and silicates. Alkali metals, such as sodium and potassium Carbonates, bicarbonates, and silicates of umum are particularly useful herein.

Aluminosilicate ion exchange materials useful in the practice of this invention are commercially available.

Aluminosilicates useful in the present invention may be crystalline or amorphous in structure. can be a naturally occurring aluminosilicate, or can be synthetically derived . A method for producing aluminosilicate ion exchange materials was published by Kruger on October 12, 1976. U.S. Pat. No. 3,985,669 to Mel et al. (incorporated herein by reference) is discussed. Preferred synthetic crystalline aluminosilicate ions useful herein Exchange materials are available under the designations Zeolite A1, Zeolite B1 and Zeolite X. can. In a particularly preferred embodiment, a crystalline aluminosilicate ion exchanger The quality is Zeolite A and the formula %formula% (wherein X is about 20 to about 30, especially about 27).

Water soluble organic builders are also useful here. For example, alkali metal polycarbonate Acid acids are useful in the present compositions. A specific example of a polycarboxylate builder salt is These include ethylenediaminetetraacetic acid, nitrilotriacetic acid, oxydisuccinic acid, and mesothoic acid. , benzene polycarboxylic acid, polyacrylic acid, polymaleic acid, and citric acid The sodium and potassium salts of

Other desirable polycarboxylate builders include Diere U.S. Pat. No. 08,067 (incorporated herein by reference).

Examples of such substances include maleic acid, itaconic acid, mesaconic acid, fumaric acid, Single polymers of aliphatic carboxylic acids such as conitic acid, citraconic acid, methylene malonic acid, etc. Water-soluble salts of polymers and copolymers are included.

Other suitable polymeric polycarboxylates were introduced by Craftf on March 13, 1979. U.S. Pat. No. 4,144,226 and March 1979 issued to Field et al. No. 4,246,495 issued to Crutchfield et al. polyacetal carboxylate described in the book (both incorporated herein by reference). It is the default. These polyacetal carboxylates can be produced as follows: Ru. The ester of glyoxylic acid and the polymerization initiator are placed together under polymerization conditions. Next Then, the obtained polyacetal carboxylic acid ester is bonded to a chemically stable terminal group. Together, polyacetal carboxylates can be rapidly depolymerized in alkaline solutions. stabilized against salts, converted to the corresponding salts, and added to surfactants.

Preferred builders here are polycarboxylic acids, especially citric acid (preferably from about 5 to (used in an amount of about 10% by weight), and sodium acid pyrophosphate (preferably about 5% by weight); ~15% by weight). Such substances act as builders as well as pI (It also functions as an acid source to adjust the amount to a desired range.)

detergent aid The detergent compositions of the present invention contain all the ingredients normally found in laundry and cleaning compositions. may contain additional substances of the type, detergent adjuvants. For example, the composition Thickeners such as chill cellulose and soil suspending agents may be included. various enzymes, Enzyme stabilizers, foam inhibitors, fragrances, optical bleaches, fillers, anti-caking agents, fabric softeners, etc. in order to confer the usual benefits resulting from the use of such substances in detergent compositions. may be present in the composition.

This composition is essentially free of oxygen bleach. because if they exist For example, there is no need for chlorine scavengers. Similarly, chlorine scavengers contain large amounts of active salts. Chlorine bleach should not be present as it will not be effective against the bleach.

The finished detergent composition of the invention can contain trace amounts of substances that make the product more attractive. . The following are listed as examples: benzotriazole, ethylenethiourea, etc. Anti-fog agents may be added in amounts up to 2% by weight; fluorescent agents, fragrances and dyes may be added as required. Although not essential, it can be added in small amounts.

Alkaline substances such as sodium or potassium carbonates, hydroxides are It can be added in trace amounts as a regulator.

Suitable additives include bacteriostatic agents, bactericides, corrosion inhibitors, e.g. soluble alkalis. Silicate (preferably with SiO2/Na20 ratio 1:1 to 2.8:1) (sodium silicate) and fabric softeners may also be mentioned.

Particularly preferred compositions here include: by weight (a) Weight ratio of sulfonate surfactant to sulfate surfactant from 4 = 1 About 1=1, preferably about 2:1 C11 to C13 (preferably C12 to C13) an alkylbenzene sulfonate surfactant and C12 to C16 (preferably 014 ~c1. ) 15% to about 25% in admixture with alkyl sulfate surfactants, preferably Preferably about 18% to about 23%; (b) molar ratio of S i02 to alkali metal oxide Alkali metals (preferably from about 1% to about 3%, preferably from about 1,5% to about 2. 5%; (c) (i) formula %formula% (wherein 2 and y are at least 6 and the molar ratio of 2 to y is 1.0-0.5 (X is 10 to 264) a crystalline aluminosilicate material having a particle size of 0.1 micron to about 10 micron, calci ion exchange capacity of at least about 200 ■Ca, COa equivalent/g and calcium Muion ion exchange rate of at least about 2 grains having Ca/gal/min/g/gal; (11) Experimental formula %formula%) (where M is sodium, potassium, ammonium, or substituted ammonium) (2 is about 0.5 to about 2, and y is 1) an amorphous hydrated aluminosilicate material, which is equivalent to 81 g of anhydrous aluminosilicate material. Magnesium ion exchange capacity equivalent to at least about 501 g of Ca, COa hardness And Mg++ exchange rate has an exchange rate of approximately 1 grain/gal/min/g/gal. Ru: and (1ii) mixture thereof A finely ground aluminosilicate ion exchange material selected from the group consisting of 20% to about 30%, preferably about 22% to about 28%, more preferably about 25% to about 28%; (d) citric acid from about 4% to about 10%, preferably from about 5% to about 8%; (e) alkali metal (preferably sodium) carbonate 5% to about 20%, preferably approximately 8% to approximately 12% granular laundry detergent, said composition having a concentration of about 7% by weight in water at 20°C. to about 9.3, preferably about 8 to about 9.1, more preferably about 8.5 to about 9.0 p)I and said composition has a density of about 500 to about 600 g/liter.

Preferred aluminosilicate ion exchange materials have the formula % formula % (wherein, X is about 20 to about 30) has.

The granular detergent composition contains a relatively large amount of anionic surfactant and aluminosilica. Provides good cleaning performance due to its citrate, citric acid and carbonate builders. I can do it.

Despite having a density of about 500 to about 600 g/liter, the composition has a good ie free-flowing and easily soluble in washing liquids. citric acid and The amount of carbonate can be adjusted to obtain the desired pH range and add additional builder functionality to the aluminosiloxane. selected to feed the cate substance.

All percentages, parts and ratios herein are by weight unless otherwise specified.

The following examples illustrate the present compositions.

Example The granular detergent composition of the present invention consists of the following components.

12.3 Sodium linear alkylbenzene sulfonate 13.6 12.7 1 5.8C14-C15 alkyl sodium sulfate 5.8 5.4 8.8C12 ~013 Alcohol ethoxylate (EO6) 0.0 0.0 0.5 Citric Acid 5.5 4.9 0.0 Sodium tripolyphosphate 0.0 0.0 6.8 Sodium pyrophosphate 0 ．． 0 0.0 13.1 Sodium acid pyrophosphate 0.0 0.0 12.4 Zeolite A1 hydrate (size 1-10μ) 2B, 9 27.3 0.0 carbonate Sodium 10.0 g, 90.0 Sodium silicate (Nap/5in2 ratio 1. 6) 2.2 2.1 7.6 polyethylene glycol 8000 1.4 1.3 0.6 Sodium polyacrylate (MW4500) 3.2 3.0 3.4 Protease enzyme ★ 1.8 L, 7 0.7 Sodium perborate 4 water 0.0 0.0 1.9 Ammonium sulfate 2.0 2.0 0.0 Sulfuric acid Sodium 18.3 17.1 14.4 balance (water, brightener, fragrance, foam suppressant) Including) The remainder (100,0) 1% aqueous solution at 20°C pH 8,78,99, 2★1.8 Anson units/g activity Citric acid, sodium acid pyrophosphate, enzymes, fragrances, and ammonium sulfate or or perborate (which are mixed and therefore contain the said ingredients in the amounts indicated) An aqueous clarification mix of the detergent composition is prepared and spray dried.

Fabrics laundered using said composition contain no or higher chlorine scavenger. Retains color better over time than similar compositions formulated to give wash water pH Hold.

Summary book Low pH granular laundry detergent compositions contain small amounts of chlorine scavengers, preferably ammonium salts. have The composition minimizes fading of pH-sensitive and chlorine-sensitive fabric dyes during laundering. limit.

international search report international search report US9103101 SA 47605

Claims (9)

[Claims] 1. (a) an effective amount of a chlorine scavenger; and (b) an essentially anionic surfactant, a non-ionic surfactant; on surfactants, zwitterionic surfactants, amphoteric surfactants, and cationic surfactants detergent, detergent builders, inert substances, detergent adjuvants, and mixtures thereof. granular detergent consisting of detergent ingredients selected from the group and with a remainder essentially free of bleach; A laundry detergent composition, the composition having a concentration of 7 to 9.3% by weight in water at 20°C. A granular laundry detergent composition having a pH of 2. the chlorine scavenger is an ammonium salt, preferably ammonium sulfate; A composition according to claim 1. 3. The chlorine scavenger may be sulfite, bisulfite, thiosulfite, Thiosulfate, iodide, nitrite, carbamate or ascorbate 2. The composition of claim 1, wherein the composition is a compatible salt of anion or a mixture thereof. 4. The chlorine scavenger has a molecular weight of less than 800, preferably from 200 to 400. The composition according to claim 1, which is polyethyleneimine. 5. Claim wherein the chlorine scavenger is a peroxide bleach, preferably a perborate. Item 1. The composition according to item 1. 6. 8 to 9.1, preferably 8 ．． The composition according to any one of claims 1 to 5, having a pH of 5 to 9.0. . 7. 5% to 50% detergent surfactant by weight, preferably 10% to 30% and washing Claims 1 to 6 comprising 5% to 95% sex builder, preferably 10% to 50%. The composition according to any one of the above. 8. According to any one of claims 1 to 7, comprising 5% to 10% citric acid builder. Compositions as described. 9. Claims 1 to 8 comprising 5% to 15% of sodium acid pyrophosphate builder. The composition according to any one of the above.