JPH01315499A - Liquid detergent - 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 The present invention relates to substantially non-aqueous liquid cleaning agents of the type comprising solid particles dispersed in a liquid phase.

For reasons that are not clearly understood, manufacturing such cleaning products in large quantities and storing them for several hours immediately after production can significantly increase the temperature in the bulk of the liquid. This effect is called "self-heating".

This is dangerous from a safety point of view and may lead to the decomposition of certain components in the product.

Applicants have discovered that incorporating free radical scavengers into the product can alleviate this problem.

Accordingly, the present invention provides a substantially non-aqueous liquid cleaning composition comprising a dispersion of solid particles in a liquid phase, the composition comprising a bleaching agent and a free radical scavenging agent. .

The problem is particularly acute when bleaches, especially inorganic persalts, optionally together with their precursors, are incorporated into the product.

Products containing such bleaching agents are a preferred embodiment of the present invention, as the scavenger action is particularly beneficial in such products. The persalt salt may especially be sodium perborate in hydrate form. Other persalts are listed below.

Since free radical scavengers are well known in the organic chemistry art, the particular substances used can be selected from a very wide range of known compounds. However, two typical examples are butylated hydroxytoluene (B)IT) and 1,1,3-tris(2-methyl-4-hydroxy- 5-t-butylphenyl)butane.

Typically, the scavenger is 0.1-1% by weight of the total composition.
, typically in a proportion of 0.25 to 0.5% by weight.

European Patent Book III EP-to-209228 (
Chlorox) stabilizes aqueous bleach compositions;
The use of free radical scavengers to prevent nonionic surfactants or any other ingredients from being attacked by bleaching agents is described.

US Pat. No. 4,088,594 (Fernley/
5hell) discloses that nonionic surfactants can be stabilized with alkylidene bisphenols even in the absence of water.

However, none of the above specifications disclose that the self-heating of non-aqueous liquids containing bleach can be reduced by using scavengers.

Bleaching agents may include halogen bleaches, particularly chlorine bleaches as provided in the form of known alkali metal hypohalites, such as hypochlorites.

For textile washing oxygen bleaches are suitable, for example in the form of inorganic persalts, preferably with precursors or in the form of peroxy acid compounds.

Inorganic persalt bleaches are best. In that case, lower temperature,
That is, it preferably contains a precursor that increases the bleaching effect at temperatures ranging from room temperature to about 60°C;
Such bleach systems are therefore commonly known as low temperature bleach systems and are well known in the art. Inorganic persalt monohydrates and tetrahydrates, such as sulfur perborate, act to release active oxygen in solution, and the precursor is usually one or more reactive acyl residues. An organic compound with a group of residues that forms a peracid and provides more effective bleaching action at lower temperatures than peroxy bleach compounds alone.

The weight ratio of peroxy bleach compound to precursor is about 15
:1 to about 2:1 - preferably about 10:1 to about 3.5:
It is 1. The amount of the bleach system, i.e. peroxy bleach compounds and precursors, ranges from about 5% to about 35% by weight of the total liquid, while the amount of components forming the bleach system used ranges from about 6% to about 3% by weight of the total liquid.
0% by weight is preferred (i.e., the preferred level of peroxy bleach compound in the composition is from about 5.5% to about 27% by weight, and the preferred level of precursor is from about 0.5% to about 10% by weight)
% by weight, optimally from about 1 to about 5% by weight.

Typical examples of suitable peroxy bleach compounds are the tetrahydrates and -hydrates of alkali metal perborates, alkali metal percarbonates, alkali metal persilicates, and alkali metal perphosphates. Among these, sodium perborate is preferred.

Precursors for peroxy bleach compounds are described in British Patent Specification Nos. 836988, 855735, 907356;
907358, 907950, 1003310 and 1246339, U.S. Patent Nos. 3,332,882 and 4,128,494, Canadian Patent No. 8444
81 and South African Patent No. 6876.344.

Although the precise mechanism of action of such LIR precursors has not been elucidated, it is thought that a peracid is formed by the reaction between the precursor and an inorganic peroxy compound, and this peracid releases active oxygen by decomposition. It will be done.

Precursors are generally compounds that contain N-acyl or 0-acyl or 0-aryl residues in the molecule and that exert an activating effect on peroxy compounds when they come into contact with the compounds in the wash liquor.

Typical examples of precursors included in these groups are N, N
, N', N'-tetraacetylethylenediamine (T
ACU) and polyacylated alkylene diamines such as N,N,N',N'-tetraacetylmethylenediamine (TAND), tetraacetylglycoluril (TAND),
ACU) such as acylated glycolurils, triacetyl cyanurates and sodium sulfophenylethyl carboxylic acid esters.

A particularly preferred pre-N material is N,N,No,No-tetraacetylethylenediamine (TAED).

The organic peroxy acid compound bleach is preferably in solid form at room temperature and optimally has a melting point of at least 50°C. Most commonly, the bleaching agents are organic peroxy acids and their water-soluble salts having the formula: % where R is an alkylene or substituted alkylene group containing from 1 to 20 carbon atoms or from 6 to 20 carbon atoms; It is an arylene group containing 8 carbon atoms, where Y is hydrogen, halogen, alkyl, aryl or any group that forms an anionic moiety in aqueous solution.

Another suitable class of peroxy compounds that may be incorporated to enhance distribution/dispersibility in water is perboric anhydride as described for this purpose in European Patent Specification EP-A-217454 (Unilever). It's salt.

In the compositions of the invention, the liquid phase can be a liquid surfactant, an organic non-aqueous non-surfactant liquid, or a mixture of such materials. Many of the compositions contain surfactants as dispersed or dissolved solids, or more often as all or part of the liquid phase. These surfactant compositions can be used, for example, in liquid detergents (l) for textile washing or coin surface cleaning.
1quid: detergent product
s). On the other hand, in a broader sense, "driftwood cleaning agent"
The term ``id cleaning product'' still refers to non-surfactant liquids useful in cleaning, e.g. Also included are those composed of active light solvents. Such pretreatment agents may include solid bleaches, dispersed enzymes, and the like.

Solid particles can be maintained dispersed (ie, prevented from settling, if not completely) in the liquid phase by a number of means.

For example, sedimentation may be prevented simply by the relatively small particle size and relatively high viscosity of the solvent phase. In other words, the particles settle very slowly at the rate predicted by Stokes' law or due to the formation of particle flocs, which are loosely aggregated networks. This effect can be seen in patent specification 1 JEP-^-30096 (IC!> and GB2158
8388 (Colgate-Palmol 1ve).

On the other hand, there are also some prior proposals for using other means to enhance solid suspension properties in such non-aqueous liquids. These proposals are based on so-called external structuring methods used in aqueous systems.
ng techniques), i.e., apart from the particulate solid and the liquid phase in which the solid is to be suspended, another dispersant is used, which dispersant, via some means, maintains a stable dispersion of the solid over a given period of time. or function to promote suspension. Any of these means may be used in the compositions of the present invention.

One way to obtain such adequate stabilization is to use a nonionic surfactant as the liquid phase and add an inorganic carrier material, especially bulky silica, as a dispersant. Silica works by forming a network that suspends solids. This silica has a very small particle size and therefore a large surface area and therefore is bulky. This is described in British Patent No. 120571 '1 (tlni 1ever)
and specification No. 1270040 (tlnile-ver)
It is described in.

Similar suitable structuring can be obtained using particulate chain structured clays as described in European Patent No. 41 EP-^-34,387.

Another suitable example of using the material as a dispersant for dispersing particles in a nonionic, nonaqueous composition is to formulate a hydrolyzable copolymer of maleic anhydride with ethylene or vinyl methyl ether, The copolymer is at least 30% hydrolyzed.

This is described in patent specification EP-^-28849.

Another suitable means conventionally used for stabilizing such dispersions is as disclosed in European Patent Specification EP-266199 (Llnilever).
It is a dispersant substance called a "deflocculant".

All compositions of the present invention are liquid cleaning agents. These compositions can be prepared in a wide variety of specific forms, depending on the intended purpose. These compositions can be used as hard surface cleaners (with or without abrasives) or as dishwashing agents (also for cleaning tableware, cutlery, etc.) by hand or mechanical means, as well as for example It may be formulated in the form of a special purpose cleaner for surgical equipment or dentures.

These compositions may also be formulated as textile detergents and/or conditioning agents.

For hard surface cleaning, the composition may be formulated as a main cleaning agent or as a pre-treatment agent, such as being sprayed or applied and then removed by wiping or as part of the main cleaning step.

In the case of dishwashing, the composition may likewise be a main cleaning agent or a pretreatment agent and may be applied, for example, by spraying or by immersing the kitchen utensils in an aqueous solution and/or suspension of the composition.

Said cleaning agent prepared for cleaning and/or conditioning textiles constitutes a particularly preferred embodiment of the invention. These compositions may be of the type used, for example, to pre-treat (eg stain remove) textiles with pure or diluted compositions prior to rinsing and/or main washing. The composition may be used as a main wash detergent to be dissolved and/or dispersed in the water with which the fabric comes into contact. In that case, the term "composition" refers to compositions of the type used as fabric conditioners (including fabric softeners, sometimes referred to as "rinse conditioners") that are added only to the rinse water. It also includes things.

The composition therefore contains at least one substance that aids in the cleaning and/or conditioning of the article in question, selected according to the intended purpose.

Typically, such substances are selected from surfactants, enzymes, bleaches, disinfectants, fabric softeners (in the case of textiles) and abrasives (in the case of hard surface cleaning). It will be appreciated that more than one of these materials may be used, often in conjunction with other ingredients commonly used in the product form in question.

The compositions of the present invention are substantially free of substances harmful to the articles being treated. For example, the composition is substantially free of pigments or dyes, but of course includes dyes (colorants), fluorescent agents, blue tinting agents, such as those often used to impart desirable colors to liquid cleaning products. etc. may be contained in small amounts.

All components before blending are either liquids or solids; if liquid, all components constitute all or part of the liquid phase in the composition; if solid, all components constitute all or part of the liquid phase in the composition. dispersed as peptized particles in the liquid phase or dissolved in the liquid phase. Therefore, as used herein, "solids"
The term solid phase material added to and dispersed in the composition in solid form, solid material dissolved in the liquid phase, solidified (subjected to a phase change) in the composition, and then dispersed in the composition. It is interpreted as representing the material in the liquid phase.

When adding a deflocculant, depending on the liquid, solids and dispersants/
Some combinations with peptizers do not seem appropriate to perform the liquid phase function alone. However, it is possible to formulate such liquids if used in conjunction with other liquids having the required properties, the only requirement being that if the liquid phase is composed of two or more liquids, these liquids be compatible in all compositions or be dispersible as fine droplets of one liquid in the other.

When the surfactant is a solid, it is usually dissolved or dispersed in a liquid phase. When the surfactant is a liquid, it usually constitutes all or part of the liquid phase.

Additionally, some surfactants are particularly suitable as peptizers.

However, in general, surfactants are Manufac-
turing Confectioners Comp
any's McCutcheon Day Vision publication "McC"
utcheon's Emulsifiers &De
Sch, included in recent editions of
'5urface Ac by wartz & perry
tive Agents'Vol1. I (Inte
rscience 1949) and Schwartz
.

'5 surface Ac by Perry & Berch
tive Agents'Vol1. ri (Inte
rsscience 1958) or 'Ten5icl-Tascbenbuch' by H.5 Lache, 2nd edition Carl Hanser Verlag, Mjin
Any of the classifications, bone classifications, and specific substances as described in Chen &I'lien, 1981 may be selected.

A particularly suitable class of substances for use in the liquid phase are liquid surfactants, especially of the polyalkoxylated type, especially polyalkoxylated nonionic surfactants.

-m, Applicants have found that the most suitable liquids to choose as the liquid phase are organic substances with polar molecules.

In particular, there is a tendency that those containing a relatively lipophilic part and a relatively hydrophilic part, especially a hydrophilic part rich in lone electron pairs, are suitable. This is entirely consistent with the observation that liquid surfactants, especially polyalkoxylated nonionic surfactants, are a preferred type of liquid.

Nonionic detergent surfactants are well known in the art. The surfactants include, for example, alkylphenols in which the alkyl groups have about 6 to about 12 carbon atoms;
Dialkylphenols having ~12 carbon atoms, preferably primary, secondary or tertiary aliphatic alcohols having from 8 to 20 carbon atoms (or alkyl-capped derivatives thereof), containing 10 to 10 carbon atoms in the alkyl group. It is composed of a monocarboxylic acid having about 24 carbon atoms and a water-soluble polyalkoxylene group or mono- or dialkanolamide group chemically bonded to an organic hydrophobic group derived from polyoxypropylene. The alkyl group of the fatty acid group has 10 to about 20 carbon atoms, and the alkyl group has 1 to about 20 carbon atoms.
Fatty acid mono- or dialkanolamides having 3 carbon atoms are also common. In both mono- and dialkanolamide derivatives, polyoxyalkylene moieties may optionally be present linking these groups with the hydrophobic portion of the molecule.

In all surfactants containing polyalkoxylene, the polyalkoxylene moiety is preferably composed of 2 to 20 ethylene oxide groups, or ethylene oxide and propylene oxide groups. Among the latter class, particularly when used as all or part of a solvent, those described in European Patent Specification EP-^-225654 (Unilever) are particularly preferred. Also suitable are ethoxylated nonionic surfactants which are condensates of fatty alcohols having 9 to 15 carbon atoms and 3 to 11 mol of ethylene oxide.

An example of such a condensate is a CI+-13 alcohol and (
for example) with 3 or 7 mol of ethylene oxide. These surfactants may be used as sole nonionic surfactants or in combination with surfactants such as those described in the above-mentioned European Patent No. I, especially as all or part of the solvent. You may.

Another class of suitable nonionic surfactants includes U.S. Pat.
No. 129, European Patent Specification El'-^-9235
5, EP-Am99183, EP-^-70074, °
75, 76, °77, EP-^-75994, °95,
Alkyl polysaccharides (polyglycoside/oligo 113) such as those described in any of 96 are included.

Nonionic detergent surfactants usually have a molecular weight of about 300 to about 1100
It has a molecular weight of 0. Mixtures of different nonionic detergent surfactants may be used, provided that the mixture is liquid at room temperature. Mixtures of nonionic detergent surfactants with other detergent surfactants (eg anionic, cationic or amphoteric detergent surfactants) and soaps can also be used. When using such a mixture, the mixture must be liquid at room temperature.

Examples of suitable anionic detergent surfactants include alkylbenzenesulfonic acids with 10 to 18 carbon atoms in the alkyl group, alkyl sulfates and argyl ether sulfates with 10 to 24 carbon atoms in the alkyl group. ,
Alkyl ether sulfuric acid having 1 to 5 ethylene oxide groups, each alkali metal salt of an olefin sulfonic acid prepared by sulfonation of a Cl0-C24α-olefin followed by neutralization and hydrolysis of the sulfonation reaction product, ammonium salts or alkylolamine salts.

Other surfactants that can be used are preferably 12-
There are fatty acid alkali metal soaps containing 18 carbon atoms. Typical examples of such acids are oleic acid, ricinoleic acid, and fatty acids derived from castor oil, rapeseed oil, peanut oil, coconut oil, palm kernel oil or mixtures thereof. Sodium or potassium soaps of these acids can be used. In addition to acting as a surfactant, soaps can also be used as detergent builders or fabric conditioners, other examples of which are discussed in more detail below. The oils mentioned in this paragraph may themselves constitute all or part of the liquid phase, but the corresponding low molecular weight fatty acids (triglycerides) may also be dispersed as solids or may act as structuring agents. Let's focus on the good things.

Furthermore, it is also possible to use cationic, zwitterionic and amphoteric surfactants as mentioned in the above general description of surfactants. Examples of cationic detergent surfactants are aliphatic or aromatic alkyl di(alkyl)ammonium halides, examples of soaps are Cl2-C24
It is an alkali metal salt of a fatty acid. Amphoteric detergent surfactants are, for example, sulfobetaines. The same or different types of surfactants may be used in combination to optimize structuring and/or cleaning performance.

Non-surfactants suitable as solvents include those having the preferred molecular forms described above, although other types may also be used, especially if combined with the more preferred types of the former. Generally, non-surfactant solvents may be used alone or in combination with liquid surfactants. Non-surfactant solvents with molecular structures falling into the more preferred category of the former include ethers, polyethers, alkyl amines and fatty amines (particularly di- and trialkyl and/or fatty-N-substituted amines), These include alkyl (or fatty) amides and their mono- and sheet-alkyl substituted derivatives, lower alkyl esters of alkyl (or fatty) carboxylic acids, ketones, aldehydes, and glycerides. Specific examples include dialkyl ethers, polyethylene glycols, alkyl ketones (eg, acetone) and glyceryl trialkyl carboxylates (eg, glyceryl triacetate), glycerol, propylene glycol, and sorbitol, respectively.

Preferably, the composition of the invention comprises at least 10% of the total composition. % of the liquid phase (whether or not it contains a liquid surfactant). Although up to about 90% of the liquid phase present in the composition is acceptable, in most cases a practical amount is between 20 and 70% of the composition, preferably between 20 and 5%.
It is 0% by weight.

Equally preferably, the compositions of the invention are of the prior art, rk'
a Ni Gi Yoo Tsuba Toku M'F Akira m11EP-8-26
Any peptizer (as defined above) such as those described in 6199 D may be included.

The level of peptizer material in the composition will most often be at least 0.01% by weight, usually <1.1% by weight, preferably at least 1% by weight, with up to 15% by weight being acceptable. be. For most practical purposes, the amount of peptizer is between 2 and 12%, preferably between 4 and 10% by weight of the final composition.

The compositions of the invention may preferably further contain one or more other functional ingredients selected from, for example, detergency builders and (in the case of hard surface cleaners) abrasives.

Detergent builders are substances that prevent the effects of calcium or other ions, water hardness, by a sedimentation stage or ion sequestration effect. Detergent builders include both inorganic and organic builders. Detergent builders can also be juxtaposed to phosphorus-based and phosphorus-free systems.

A decent 7+! Machine builders include various phosphate-, carbonate-, silicate-, borate-, and aluminosilicate-type materials, particularly in the alkali metal salt form. Mixtures of these salts may also be used.

Examples of phosphorus-based inorganic builders include water-soluble salts, especially alkali metal salts of pyrophosphoric acid, orthophosphoric acid, polyphosphoric acid and phosphonic acid. Specific examples of inorganic phosphate builders include sodium and potassium phosphates, sodium and potassium hexametaphosphate, and potassium tripolyphosphate.

Examples of phosphorus-free inorganic builders include water-soluble alkali metal salts of carbonic acid, bicarbonate, boric acid, silicic acid, metasilicic acid, and crystalline and amorphous aluminosilicic acids. Specific examples include sodium carbonate (with or without calcite cores), potassium carbonate, sodium and potassium bicarbonate, storum and potassium silicates, and zeolites.

Examples of organic builders include citric acid, succinic acid, malonic acid, aliphatic sulfonic acids, carboxymethoxysuccinic acid, ammonium polyacetic acid, carboxylic acids, polycarboxylic acids, aminopolycarboxylic acids, polyacetylcarboxylic acids and polyhydroxysulfonic acids. There are various alkali metal salts, ammonium salts and substituted ammonium salts of phosphoric acid. Specific examples include ethylenediaminetetraacetic acid, nitrilotriacetic acid,
Examples include sodium salts, potassium salts, lithium salts, ammonium salts, and substituted ammonium salts of oxydisuccinic acid, mellitic acid, benzene polycarboxylic acid, and citric acid. Another example is Dequest from Mon5anLo.
These are organophosphate type sequestering agents and alkane hydroxyphosphonates such as those commercially available under the trade name.

Other suitable organic builders include high molecular weight polymers and copolymers known to have builder properties, such as suitable polyacrylic acids, polymaleic acids and polyacrylic acid/polymaleic acid copolymers and their salts;
For example, there is one commercially available from BASF under the trade name 5okalan.

A particularly preferred class of phosphorus-free inorganic builders are aluminosilicates. Aluminosilicates are, for example, crystalline or amorphous materials with the formula %, where Z and Y
is an integer of at least 66 and the molar ratio of Z to Y is 1.0
~0.5, and X is a water content of about 6 to about 20% by weight (herein "partially
6 to 1 so that
It is an integer of 89. By selecting such a water content, the best fluidity is obtained in the liquid. Above this level (e.g., water content of about 19 to about 28 weight percent), water can lead to network formation. On the other hand, aluminosilicates are essentially anhydrous (
For example, a moisture content of 0 to about 6% by weight, typically about 4% by weight.
) is optimal.

In some cases, anhydrous materials (i.e., moisture content of 0 to about 6% by weight)
) can also be used as a structuring agent. The preferred range of aluminosilicate is about 12 to about 30% on anhydride basis. The aluminosilicate preferably has a particle size of from 0.1 to 1001 m, ideally from 0.1 to 10-ring, and has a calcium ion exchange capacity corresponding to at least 200 zg of calcium carbonate per gram.

The composition of the present invention contains an abrasive agent for cleaning hard surfaces (
(ie, liquid abrasive cleaners), the abrasive is necessarily formulated as a particulate solid. The abrasive may be non-water soluble, such as calcite. Suitable materials of this kind are described in patent specifications EP-^-50887, EP-^-8022.
1, EP-^-140452, EP-^-214540
and EP 9942 (both in the name of Unilever), which documents concern such abrasives when suspended in an aqueous medium. Water-soluble abrasives can also be used.

The compositions of the invention may optionally include fabric conditioning agents, enzymes, fragrances (including deodorants), fungicides, colorants,
One or more minor ingredients may also be included, such as fluorescent agents, soil suspending agents (anti-redeposition agents), corrosion inhibitors, enzyme stabilizers, and suds suppressants.

Generally, the solids content of the cleaning by-products is in a wide range, for example from 1 to 90%, usually from 10 to 80%, preferably from 15 to 70%, especially from 15 to 50% by weight of the final composition. be. The solid phase is granular and less than 300uII1,
Preferably less than 2001w+, more preferably 1001w+
It has an average particle size of less than 10 m, especially less than 10 m. The particle size may be of submicron size. Proper particle size can be obtained by using appropriately sized materials or by comminution of the entire product in suitable comminution equipment.

The composition is substantially non-aqueous, ie it contains little or no water, the water content preferably being less than 5%, preferably less than 3% and especially less than 1% by weight of the total composition. According to the findings of the present applicant, the higher the water content, the greater the tendency for the viscosity to become excessively high, and in some cases, the greater the tendency for hardness and self-heating to occur. However, this can be at least partially solved by using peptizers, especially relatively large amounts of peptizers.

The purpose of a non-aqueous liquid is generally to enable the formulator to avoid the negative effects of water on the ingredients, e.g. creating incompatibility of the functional ingredients, so that the It is necessary to ensure that water is not added to the product accidentally or intentionally.

That is, during production, all raw materials are preferably in a dry state and (in the case of water-compatible salts) in a low hydrated state, such as anhydrous phosphate builder, 1-lium perborate-hydrate Calcite and dry calcite abrasives are used in the composition. According to a preferred method, a dry, substantially anhydrous solid is blended with a liquid phase in a drying container. To minimize the settling rate of the solids, the blend may be passed through a grinding mill or combination of mills, such as a colloid mill, corundum disc mill, horizontal or vertical stirred ball mill, etc.
．． 1 to 100μ, preferably 0.5 to 50111I,
Ideally, a particle size of 1 to 101 m should be obtained. A suitable combination of such mills is a colloid mill followed by a horizontal ball mill, and the reason is that
This is because these mills can be operated at the conditions necessary to obtain a narrow particle size distribution in the final product. Of course, if the particulate material already has the desired particle size, this step is not necessary and the particulate material can be compounded during later processing steps if desired.

During this milling procedure, the energy input increases the temperature of the product and releases air trapped within or between the particles of the solid component. Therefore, some heat-sensitive ingredients may be incorporated into the product after the milling stage and the subsequent cooling stage.
It is highly desirable that the These (usually in trace amounts)
It may also be desirable to degas the product prior to addition of ingredients, and possibly at any other stage of the process. Typical ingredients that may be added at this stage are fragrances and enzymes, but also volatile solvent ingredients. #Can be added to foods. However, it is particularly advantageous to introduce the volatile substance after the degassing step. Suitable equipment for cooling (eg heat exchangers) and degassing are known to those skilled in the art.

Naturally, all equipment used in this process should be completely dry, and special care should be taken after the cleaning step. The same applies to subsequent storage and filling equipment.

The present invention will be explained below with reference to Examples.

Two compositions were prepared, each having the following "base" composition.

Nonionic surfactant (1) 36.8 Glyceryl triacetate 5.0 Yaguchi S^(
2)
3.0 Anhydrous carbonate, sodium
4.0 Anhydrous sodium tripolyphosphate
30.0 Sodium perborate -hydrate 15
．． 0EDT^
0.15SCMC1,0 TAED
4.0 trace acid content (3)
0.9(1) C9-1 fatty alcohol alkoxylated with an average of 9 moles of ethylene oxide.

(2) Dodecylbenzenesulfonic (free) acid.

(3) Bleach stabilizers, enzymes, fragrances.

Addition (ρost-
Varying amounts of two different scavengers were added by dosing or by blending with other ingredients at the milling stage.

Place the test sample in a vacuum flask and
Placed in an oven at a temperature of °C. A micro thermocouple was used to monitor the temperature of the sample and the rate of temperature rise was recorded when the sample exceeded the furnace temperature. This data was used to determine the exotherm rate of the sample. The heat of formation in the 50-80°C temperature range is a useful indicator of the expected processing temperature range. Using this method, 200
When the heat generated from the sample g was measured, the following results were obtained.

Claims (10)

[Claims] (1) A substantially non-aqueous liquid cleaning composition comprising a dispersion of solid particles in a liquid phase, the composition comprising a bleaching agent and a free radical scavenger. 2. The composition of claim 1, wherein the bleaching agent comprises an inorganic persalt. (3) The composition according to claim 2, further comprising a bleach precursor. (4) The composition according to claim 2 or 3, wherein the persalt is sodium perborate. (5) The composition according to claim 4, characterized in that the perborate salt is in the form of a monohydrate. (6) Claim 1, characterized in that the scavenger is blended in a proportion of 0.1 to 1.0% by weight of the entire composition.
The composition described in . (7) Scavenger is 0.25 to 0.5 of the total composition
The composition according to claim 1, wherein the composition is blended in a proportion of % by weight. (8) Scavenger is butylated hydroxytoluene, 1
,1,3-tris(2-methyl-4-hydroxy-5-
Composition according to claim 1, characterized in that it is selected from t-butylphenyl)butane and mixtures thereof. 9. The composition of claim 1, wherein the solid particles substantially comprise anhydrous aluminosilicate builder. (10) The composition according to claim 1, further comprising deflocculant particles.