CA1146833A - Washing bar - Google Patents
Washing barInfo
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- CA1146833A CA1146833A CA000375232A CA375232A CA1146833A CA 1146833 A CA1146833 A CA 1146833A CA 000375232 A CA000375232 A CA 000375232A CA 375232 A CA375232 A CA 375232A CA 1146833 A CA1146833 A CA 1146833A
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Abstract
B 492/497 (R) Abstract of the Disclosure Washing bars for cleaning fabrics and washing bars for personal washing are disclosed. The improved bars of the invention, which comprise at least about 10% by weight of a detersive surfactant with or without a detergency builder, less than about 20% by weight of water and optionally about 50% by weight of an inert filler and yield a pH of at least 6 when dispersed in one part by weight of water, include a material yielding halite ions in aqueous media, preferably sodium chlorite.
The bars when used for washing under ultra-violet radiation conditions, e.g. from an artificial source or from sunlight, provide satisfactory bleaching to articles washed therewith.
The bars when used for washing under ultra-violet radiation conditions, e.g. from an artificial source or from sunlight, provide satisfactory bleaching to articles washed therewith.
Description
~ ~3 - 1 - B 492/497 (R) WASHING BAR
The invention relates to a washing bar, i.e. a detergent compo-sition in bar form.
It is known to include bleaches in cleaning products, in parti-cu1ar in detergent compositions for cleaning fabrics and hard surfaces, for example. It is known for these bleaches to be photobleaches or to be bleaches activated by photosensitive bleach activators. For example, United States Patent Specifica-tion No. 4,033,818 describes a detergent composition containing particular species of zinc phthalocyanine as an oxygen bleach activator.
It is also known to use alkali metal chlorites as a bleach.
For example, it is known to bleach cellulose with sodium chlorite in an acid medium, the chlorite in the acid medium producing chlorine dioxide, which is the species responsible for the actual bleaching. Acidic media are generally unsuitable for domestic cleaning processes. It is also known to activate chlorites at high pH with activators such as hydroxylammonium salts (see US Patent Specification No. 3,836,475), but such activators are expensive and may also be toxic. For these reasons they have not found commercial success in domestic situations.
It is further known from British Patent Specification ~o. 1,397,595 to use alkalimetal chlorite, particularly sodium chlorite, activated by high energy radiation, particular from X-rays, ~-rays and elec-tron rays, for bleaching fabrics under alkaline conditions.
It is an object of the present invention to provide a detergent composition in bar form which imparts a bleaching effect at al-kaline or neutral pH without the use of high cost activators or high energy X-rays, y-rays or electron rays.
We have discovered that satisfactory washing and bleaching of fabrics can be obtained by using a washing bar containing a chlorite or other halite, if the liquor containing the formula-~ '~
`~
The invention relates to a washing bar, i.e. a detergent compo-sition in bar form.
It is known to include bleaches in cleaning products, in parti-cu1ar in detergent compositions for cleaning fabrics and hard surfaces, for example. It is known for these bleaches to be photobleaches or to be bleaches activated by photosensitive bleach activators. For example, United States Patent Specifica-tion No. 4,033,818 describes a detergent composition containing particular species of zinc phthalocyanine as an oxygen bleach activator.
It is also known to use alkali metal chlorites as a bleach.
For example, it is known to bleach cellulose with sodium chlorite in an acid medium, the chlorite in the acid medium producing chlorine dioxide, which is the species responsible for the actual bleaching. Acidic media are generally unsuitable for domestic cleaning processes. It is also known to activate chlorites at high pH with activators such as hydroxylammonium salts (see US Patent Specification No. 3,836,475), but such activators are expensive and may also be toxic. For these reasons they have not found commercial success in domestic situations.
It is further known from British Patent Specification ~o. 1,397,595 to use alkalimetal chlorite, particularly sodium chlorite, activated by high energy radiation, particular from X-rays, ~-rays and elec-tron rays, for bleaching fabrics under alkaline conditions.
It is an object of the present invention to provide a detergent composition in bar form which imparts a bleaching effect at al-kaline or neutral pH without the use of high cost activators or high energy X-rays, y-rays or electron rays.
We have discovered that satisfactory washing and bleaching of fabrics can be obtained by using a washing bar containing a chlorite or other halite, if the liquor containing the formula-~ '~
`~
- 2 - B 492/497 (R) tion or fabrics in contact therewith are irradiated with ultra-violet light. The present invention therefore provides a deter-gent composition in bar form for washing under ultra-violet light radiation.
Thus, according to the invention there is provided a de-tergent composition in bar form comprising:
(i) at least about 10%, preferably from about 15% to about 99.5% by weight of a detersive surfactant with or without a detergency builder;
(ii) at least about 0.1%, preferably from about 0.5%
to about 40% by weight of a material yielding halite ions in aqueous media;
(iii) less than about 20% by weight of water; and optionally (iv) up to about 50% by weight of an inert filler, the composition yielding a pH of at least 6.0 when dispersed in one part by weight of water.
The detersive surfactant may be selected from soaps; anionic, zwitterionic, amphoteric, semi-polar, nonionic or cationic surfactants; and any mixtures thereof. Suitable such surfactants are for example sodium soaps of C12-C18 fatty acids, sodium al-kyl benzene sulphates, sodium alkane sulphonates, sod1um olefin sulphonates, sodium alkyl sulphates and ethylene oxide or ethyl-ene oxide/propylene oxide condensation products.
Further suitable surfactant materials are disclosed in Schwartz-Perry: "Surface-active agents and detergents", Vol. II, 1958.
In laundry bars for cleaning fabrics the detersive surfactant may include a detergency builder in an amount of up to about 80%, preferably about 15% to about 40% by weight of the composi-tion. The builder may be selected from alkali metal phosphates and carbonates, aluminosilicates and other known inorganic and organic builders.Examples of such builders are sodium tripoly-phosphate, sodium pyrophosphate, sodium orthophosphate, sodium carbonate, zeolite and nitrilotriacetate. A particularly pre-
Thus, according to the invention there is provided a de-tergent composition in bar form comprising:
(i) at least about 10%, preferably from about 15% to about 99.5% by weight of a detersive surfactant with or without a detergency builder;
(ii) at least about 0.1%, preferably from about 0.5%
to about 40% by weight of a material yielding halite ions in aqueous media;
(iii) less than about 20% by weight of water; and optionally (iv) up to about 50% by weight of an inert filler, the composition yielding a pH of at least 6.0 when dispersed in one part by weight of water.
The detersive surfactant may be selected from soaps; anionic, zwitterionic, amphoteric, semi-polar, nonionic or cationic surfactants; and any mixtures thereof. Suitable such surfactants are for example sodium soaps of C12-C18 fatty acids, sodium al-kyl benzene sulphates, sodium alkane sulphonates, sod1um olefin sulphonates, sodium alkyl sulphates and ethylene oxide or ethyl-ene oxide/propylene oxide condensation products.
Further suitable surfactant materials are disclosed in Schwartz-Perry: "Surface-active agents and detergents", Vol. II, 1958.
In laundry bars for cleaning fabrics the detersive surfactant may include a detergency builder in an amount of up to about 80%, preferably about 15% to about 40% by weight of the composi-tion. The builder may be selected from alkali metal phosphates and carbonates, aluminosilicates and other known inorganic and organic builders.Examples of such builders are sodium tripoly-phosphate, sodium pyrophosphate, sodium orthophosphate, sodium carbonate, zeolite and nitrilotriacetate. A particularly pre-
- 3 - B 492/497 (R) ferred composition contains a synthetic anionic surfactant and a detergency builder.
The material yielding halite ions in aqueous media is prefer-ably selected from chlorites and bromites, particularly chlori-tes, of substituted or unsubsituted ammonium, alkali metals (for example sodium, potassium or lithium) or alkaline earth metals (for example calcium or magnesium). The preferred material is sodium chlorite.
The inert filler, when present, may be selected from sodium sulphate, calcite and clays and mixtures thereof.
It is usual for the bar to be rubbed onto fabrics which have already been wetted, after which the fabrics are agitated in water. The amount of water present depends to a large extent on the user. Generally more than one part by weight of water will be present for each part by weight of the composition.
For a laundry bar it is essential that the composition should yield a pH of at least 6.0, preferably from about 8.5 to about 11.0, when dispersed in one part by weight of water.
The desired pH may be achieved by the addition of buffering agents, although where the various components of the composi-tion have a suitable natural pH, no buffering agent needs to be added.
The exposure to ultra-violet light may be achieved by exposing the dispersed composition of the fabrics in contact therewith to daylight or to an artificial source of ultra-violet light.
Thus the dispersed composition may be irradiated before contact with the fabrics or while the dispersed composition is in con-tact with the fabrics, or alternatively the fabrics may be ir-radiated while in contact with the dispersed composition or thereafter. It is essential that this radiation should occur before the halite is removed, e.g. by rinsing, from the fabrics.
The ultra-violet light preferably has a component with a wave-.
~`~3
The material yielding halite ions in aqueous media is prefer-ably selected from chlorites and bromites, particularly chlori-tes, of substituted or unsubsituted ammonium, alkali metals (for example sodium, potassium or lithium) or alkaline earth metals (for example calcium or magnesium). The preferred material is sodium chlorite.
The inert filler, when present, may be selected from sodium sulphate, calcite and clays and mixtures thereof.
It is usual for the bar to be rubbed onto fabrics which have already been wetted, after which the fabrics are agitated in water. The amount of water present depends to a large extent on the user. Generally more than one part by weight of water will be present for each part by weight of the composition.
For a laundry bar it is essential that the composition should yield a pH of at least 6.0, preferably from about 8.5 to about 11.0, when dispersed in one part by weight of water.
The desired pH may be achieved by the addition of buffering agents, although where the various components of the composi-tion have a suitable natural pH, no buffering agent needs to be added.
The exposure to ultra-violet light may be achieved by exposing the dispersed composition of the fabrics in contact therewith to daylight or to an artificial source of ultra-violet light.
Thus the dispersed composition may be irradiated before contact with the fabrics or while the dispersed composition is in con-tact with the fabrics, or alternatively the fabrics may be ir-radiated while in contact with the dispersed composition or thereafter. It is essential that this radiation should occur before the halite is removed, e.g. by rinsing, from the fabrics.
The ultra-violet light preferably has a component with a wave-.
~`~3
- 4 - B 492/497 (R) length of between about 200 nm and about 400 nm, most preferably less than 370 nm. The intensity of the ultra-violet light, as measured at the fabric surface or at the surface of the liquor is preferably from about 0.01 to about 10.0, more preferably from S about 0.05 to about 0.2 Wm 2nm 1. Typical bright sunlight has an intensity over most wavelengths of 0.1-0.2 Wm 2nm 1. Under these conditions a suitable exposure time is between about 10 minutes and about 10 hours, more preferably between about 30 minutes and about 4 hours, depending on the concentration of the chlorite in the liquor and on the degree of bleaching required. The preferred light intensity can alternatively be expressed as from about 10 1 to about 10 6, preferably from about 10 2 to about 10 4 Einsteins of energy in the 200 nm to 370 nm wavelength region per litre of liquor.
The detergent composition may contain one or more ingredients other than those specified above, for example other bleaches, bleach pre-cursors and colorants, including photoactivated bleaches such as sulphonated zinc phthalocyanine, anti-foaming agents, anti-rede-position agents, perfumes, perfume carriers, enzymes, organic sol-vents, optical brightening agents, thickeners, preservatives, dyes, plasticizers, processing aids, whitening agents, colouring agents or electrolytes.
Preferred optical brightening agents for use in the present inven-tion are disodium-4,4'-bis(2-sulphostyryl)-biphenyl and disodium-4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)-2,2'-stilbene-disulphonate.
The composition should, before use, contain substantially no ma-terial which in the aqueous liquor will react with and remove the halite ions. Thus, chlorite ions are known to react with chlorite or chlorine producing materials such as calcium hypochlorite or sodium dichloroisocyanurate to produce chlorir.e dioxide. Thus, the compcsition preferably contains, for each part by weight of halite-yielding material, less than 0.4 parts, advantageously less than 0.1 part by weight of a material which in aqueous media
The detergent composition may contain one or more ingredients other than those specified above, for example other bleaches, bleach pre-cursors and colorants, including photoactivated bleaches such as sulphonated zinc phthalocyanine, anti-foaming agents, anti-rede-position agents, perfumes, perfume carriers, enzymes, organic sol-vents, optical brightening agents, thickeners, preservatives, dyes, plasticizers, processing aids, whitening agents, colouring agents or electrolytes.
Preferred optical brightening agents for use in the present inven-tion are disodium-4,4'-bis(2-sulphostyryl)-biphenyl and disodium-4,4'-bis(4-phenyl-1,2,3-triazol-2-yl)-2,2'-stilbene-disulphonate.
The composition should, before use, contain substantially no ma-terial which in the aqueous liquor will react with and remove the halite ions. Thus, chlorite ions are known to react with chlorite or chlorine producing materials such as calcium hypochlorite or sodium dichloroisocyanurate to produce chlorir.e dioxide. Thus, the compcsition preferably contains, for each part by weight of halite-yielding material, less than 0.4 parts, advantageously less than 0.1 part by weight of a material which in aqueous media
- 5 - ~ 492/497 ~R) in the absence of UV-light reacts to a substantial extent with the halite ions, that is reacts with at least a major proportion of the halite ions.
In order to achieve adequate soil removal from the substrate, in addition to bleaching, it is desirable for the ratio of the total weight of the surfactant and builder ~when present) to the weight of the halite yielding material to be in excess of 1:1, preferably in excess of 3.5:1, ideally in excess of 5.0:1.
The invention can also be applied to give an improved persona~
washing bar for washing the skin. In such bars the detersive surfactant will normally be soap, but may also be selected from synthetic anionic, zwitterionic, amphoteric, semi-polar, cation-ic and nonionic surfactants and mixtures thereof or mixtures there-of with soap, though generally without the inclusion of a deter-gent builder.
In use the composition of the personal washing bar comes into contact with the skin in the presence of water. Simultaneously with, or subsequent to, the contact between the composition and the skin, the skin is exposed to ultra-violet light. ~hile this may be derived from an artificial source, it is most convenient if the source of radiation is daylight.
There are no specific requirements in the methods used to pre-pare the bars of the invention. A number of methods are known in the art (see e.g. U.S. Patent Specificatio~ No. 3,291,744 and 3,178,370) and these methods are suitable for the manufac-ture of bars with the material yielding halite ions being added at a suitable stage.
:
The invention will now be illustrated by the following non-limiting Examples, in which percentages and parts are by weight unless otherwise specified.
In the following Examples 1 and 2, a pyrex cell was partially filled with water. Heavily tea-stained cloths were soaked with . 6 - B 492/497 (R) water, rubbed with the surfactant bar being tested and then im-mersed in the water in the cell, with a cloth:liquor ratio of 1:4 and an effective liquor concentration of 20 g/l. The cell was then placed in the chamber of an ATLAS WEATHEROMETER which had been adjusted to an output to simulate solar radiation both in intensity and energy distribution. The chamber had an initial temperature of about 22C. After irradiating the cloths from one side only for a selected time, the reflectance of the treated cloths changes (a R460~), both of those regions of the cloths which are immersed in the liquor and of those regions of the cloths which were suspended above the liquor. Reflectance changes of both front and back of each cloth were measured, and the average taken.
The totally immersed cloth simulates a method of bowl-washing fabrics in daylight, whereas the suspended cloth simulates a re-wet sun-bleaching operation.
20 Non-soap detergent test bars were used having the following approximate formulations:
Ingredient _ % % %_ _ Sodium alkyl benzene sulphonate 28 28 28 28 Sodium pyrophosphate 16 16 16 16 Sodium carbonate 10 10 10 10 Calcite 32 27 22 17 Sodium carboxymethyl cellulose 2 2 2 2 Sodium sulphate 6 6 6 6 Water 6 6 6 6 Sodium chlorite 0 5 10 15 The bars were prepared in the following manne~: In a Planetex high shear mixer alkyl benzene sulphonic acid was neutralized with excess sodium carbonate. After about 5 minutes water; cal-cite; sodium carboxymethyl cellulose + sodium chlorite; sodiumpyrophosphate + remaining water, were added and mixed in the gîven sequential order at approximately 5 minutes' intervals.
~j 1~3 - 7 - B 492/497 (R) The mass was then milled twice in a 3-roller mill, followed by plodding and cutting into bars.
The results are set out in the following Table I.
TABLE I
~ R 460 ~
Chlorite Irradiation Suspended Immersed Concentration time cloth cloth 0 1 hour 0.1 0.0 0 1.5 hours 3.0 1.5 0 2 hours 3.3 4~1 5% 1 hour 3.7 1.7 5% 1.5 hours 6.4 3.2 5% 2 hours 7.8 6.3 10% 1 hour 5.4 5.1 10% 1.5 hours 11 . 4 10 . 4 10% 2 hours 12.2 14.7 15% 1 hour 5.6 6.7 15% 1.5 hours 11.4 13.5 15% 2 hours 12.0 18.5 Example 1 was repeated using non-soap detergent test bars of 25 the following approximate formulations:
~ % % % %
Sodium alkylbenzene sulphate 20 20 20 20 Sodium tripolyphosphate 30 30 30 30 Sodium orthophosphate 3 3 3 3 Sodium carboxymethyl cellulose 2 2 2 2 Water 9 9 9 9 Calcite 29 24 19 14 Sodium chlorite 0 5 10 15 Sodium carbonate 7 7 7 7 The bars were prepared by mixing the ingredients in the follow-ing order:
- 8 - B 492/497 (R) In a Planetex high shear mixer sodium carbonate and sodium tri-polyphosphate were mixed with alkyl benzene sulphonic acid and a small amount of water for 15 minutes to neutralize the alkyl benzene sulphonic acid to sodium alkyl benzene sulphonate. There-after the calcite; sodium carboxy methyl cellulose + sodiumchlorite + sodium orthophosphate, and water were added and mixed in the given sequential order at approximately 5 minutes' inter-vals.
The mass was then milled and plodded to form bars in the manner as described in Example 1.
The results are set out in the following Table II.
TABLE II
~ R460*
Chlorite TreatmentSuspended Immersed time cloth cloth 0 1 hour - 2.0 - 2.1 0 1.5 hours 1.4 - 2.9 ~0 0 2 hours 5.4 - 2.0 1 hour 6.8 1.4 1.5 hours 7.4 1.6 2 hours 19.8 9.7 1 hour 7.3 3.6 1.5 hours 13.0 9.7 2 hours 8.5 9.7 1 hour 12.2 17.2 1.5 hours 14.5 45.6 2 hours 21.3 38.0 The treatment liquids containing sodium chlorite in the above Examples had a pH of between 8.5 and 11Ø
EXAMPLES 3 to 5 The following compositions were made into personal washing bars and were found to exhibit a refreshing effect when used for skin washing in daylight.
~ 11~33 - 9 - B 492J497 ~R) Ingredient %
Sodium soap of tallow fatty acid 45.26 Sodium soap of coconut fatty acid 37.04 Coconut fatty acid 4.50 Sodium chlorite 1.00 Butylated hydroxy toluene 0.13 Phosphoric acid 0.12 Titanium dioxide 0.24 Water and minor ingredients balance Ingredient Sodium acyl isethionate 48.6 Sodium dodecyl benzene sulphonate 2.0 Sodium soap of coconut fatty acid 11.0 Coconut fatty acid 3.0 Sodium chlorite 0.5 Stearic acid 21.7 Water and minor ingredients balance Ingredient Sodium C11-C14 alkane sulphonate 22.1 Sodium C15-C18 alkane sulphonate 29.4 Sodium C16-C18 olefin sulphonate 22.1 Myristyl alcohol 6.3 Cetyl alcohol 5,0 Stearyl alcohol 5,0 Sodium chlorite 2.0 Water and minor ingredients balance
In order to achieve adequate soil removal from the substrate, in addition to bleaching, it is desirable for the ratio of the total weight of the surfactant and builder ~when present) to the weight of the halite yielding material to be in excess of 1:1, preferably in excess of 3.5:1, ideally in excess of 5.0:1.
The invention can also be applied to give an improved persona~
washing bar for washing the skin. In such bars the detersive surfactant will normally be soap, but may also be selected from synthetic anionic, zwitterionic, amphoteric, semi-polar, cation-ic and nonionic surfactants and mixtures thereof or mixtures there-of with soap, though generally without the inclusion of a deter-gent builder.
In use the composition of the personal washing bar comes into contact with the skin in the presence of water. Simultaneously with, or subsequent to, the contact between the composition and the skin, the skin is exposed to ultra-violet light. ~hile this may be derived from an artificial source, it is most convenient if the source of radiation is daylight.
There are no specific requirements in the methods used to pre-pare the bars of the invention. A number of methods are known in the art (see e.g. U.S. Patent Specificatio~ No. 3,291,744 and 3,178,370) and these methods are suitable for the manufac-ture of bars with the material yielding halite ions being added at a suitable stage.
:
The invention will now be illustrated by the following non-limiting Examples, in which percentages and parts are by weight unless otherwise specified.
In the following Examples 1 and 2, a pyrex cell was partially filled with water. Heavily tea-stained cloths were soaked with . 6 - B 492/497 (R) water, rubbed with the surfactant bar being tested and then im-mersed in the water in the cell, with a cloth:liquor ratio of 1:4 and an effective liquor concentration of 20 g/l. The cell was then placed in the chamber of an ATLAS WEATHEROMETER which had been adjusted to an output to simulate solar radiation both in intensity and energy distribution. The chamber had an initial temperature of about 22C. After irradiating the cloths from one side only for a selected time, the reflectance of the treated cloths changes (a R460~), both of those regions of the cloths which are immersed in the liquor and of those regions of the cloths which were suspended above the liquor. Reflectance changes of both front and back of each cloth were measured, and the average taken.
The totally immersed cloth simulates a method of bowl-washing fabrics in daylight, whereas the suspended cloth simulates a re-wet sun-bleaching operation.
20 Non-soap detergent test bars were used having the following approximate formulations:
Ingredient _ % % %_ _ Sodium alkyl benzene sulphonate 28 28 28 28 Sodium pyrophosphate 16 16 16 16 Sodium carbonate 10 10 10 10 Calcite 32 27 22 17 Sodium carboxymethyl cellulose 2 2 2 2 Sodium sulphate 6 6 6 6 Water 6 6 6 6 Sodium chlorite 0 5 10 15 The bars were prepared in the following manne~: In a Planetex high shear mixer alkyl benzene sulphonic acid was neutralized with excess sodium carbonate. After about 5 minutes water; cal-cite; sodium carboxymethyl cellulose + sodium chlorite; sodiumpyrophosphate + remaining water, were added and mixed in the gîven sequential order at approximately 5 minutes' intervals.
~j 1~3 - 7 - B 492/497 (R) The mass was then milled twice in a 3-roller mill, followed by plodding and cutting into bars.
The results are set out in the following Table I.
TABLE I
~ R 460 ~
Chlorite Irradiation Suspended Immersed Concentration time cloth cloth 0 1 hour 0.1 0.0 0 1.5 hours 3.0 1.5 0 2 hours 3.3 4~1 5% 1 hour 3.7 1.7 5% 1.5 hours 6.4 3.2 5% 2 hours 7.8 6.3 10% 1 hour 5.4 5.1 10% 1.5 hours 11 . 4 10 . 4 10% 2 hours 12.2 14.7 15% 1 hour 5.6 6.7 15% 1.5 hours 11.4 13.5 15% 2 hours 12.0 18.5 Example 1 was repeated using non-soap detergent test bars of 25 the following approximate formulations:
~ % % % %
Sodium alkylbenzene sulphate 20 20 20 20 Sodium tripolyphosphate 30 30 30 30 Sodium orthophosphate 3 3 3 3 Sodium carboxymethyl cellulose 2 2 2 2 Water 9 9 9 9 Calcite 29 24 19 14 Sodium chlorite 0 5 10 15 Sodium carbonate 7 7 7 7 The bars were prepared by mixing the ingredients in the follow-ing order:
- 8 - B 492/497 (R) In a Planetex high shear mixer sodium carbonate and sodium tri-polyphosphate were mixed with alkyl benzene sulphonic acid and a small amount of water for 15 minutes to neutralize the alkyl benzene sulphonic acid to sodium alkyl benzene sulphonate. There-after the calcite; sodium carboxy methyl cellulose + sodiumchlorite + sodium orthophosphate, and water were added and mixed in the given sequential order at approximately 5 minutes' inter-vals.
The mass was then milled and plodded to form bars in the manner as described in Example 1.
The results are set out in the following Table II.
TABLE II
~ R460*
Chlorite TreatmentSuspended Immersed time cloth cloth 0 1 hour - 2.0 - 2.1 0 1.5 hours 1.4 - 2.9 ~0 0 2 hours 5.4 - 2.0 1 hour 6.8 1.4 1.5 hours 7.4 1.6 2 hours 19.8 9.7 1 hour 7.3 3.6 1.5 hours 13.0 9.7 2 hours 8.5 9.7 1 hour 12.2 17.2 1.5 hours 14.5 45.6 2 hours 21.3 38.0 The treatment liquids containing sodium chlorite in the above Examples had a pH of between 8.5 and 11Ø
EXAMPLES 3 to 5 The following compositions were made into personal washing bars and were found to exhibit a refreshing effect when used for skin washing in daylight.
~ 11~33 - 9 - B 492J497 ~R) Ingredient %
Sodium soap of tallow fatty acid 45.26 Sodium soap of coconut fatty acid 37.04 Coconut fatty acid 4.50 Sodium chlorite 1.00 Butylated hydroxy toluene 0.13 Phosphoric acid 0.12 Titanium dioxide 0.24 Water and minor ingredients balance Ingredient Sodium acyl isethionate 48.6 Sodium dodecyl benzene sulphonate 2.0 Sodium soap of coconut fatty acid 11.0 Coconut fatty acid 3.0 Sodium chlorite 0.5 Stearic acid 21.7 Water and minor ingredients balance Ingredient Sodium C11-C14 alkane sulphonate 22.1 Sodium C15-C18 alkane sulphonate 29.4 Sodium C16-C18 olefin sulphonate 22.1 Myristyl alcohol 6.3 Cetyl alcohol 5,0 Stearyl alcohol 5,0 Sodium chlorite 2.0 Water and minor ingredients balance
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A detergent composition in bar form comprising:
i) at least 10% by weight of a detersive surfactant selected from the group consisting of soaps, anionic, cationic, zwitterionic, semi-polar, amphoteric and nonionic surfactants and mixtures thereof, with or without a detergent builder;
ii) at least 0.1% by weight of a material yielding halite ions in aqueous media, selected from the group consist-ing of chlorites and bromites of alkali metals, alkaline earth metals and substituted or unsubstituted ammonium;
iii) less than about 20% by weight of water; and optionally iv) up to about 50% by weight of an inert filler, the composition yielding a pH of at least 6 when dispersed in one part by weight of water.
i) at least 10% by weight of a detersive surfactant selected from the group consisting of soaps, anionic, cationic, zwitterionic, semi-polar, amphoteric and nonionic surfactants and mixtures thereof, with or without a detergent builder;
ii) at least 0.1% by weight of a material yielding halite ions in aqueous media, selected from the group consist-ing of chlorites and bromites of alkali metals, alkaline earth metals and substituted or unsubstituted ammonium;
iii) less than about 20% by weight of water; and optionally iv) up to about 50% by weight of an inert filler, the composition yielding a pH of at least 6 when dispersed in one part by weight of water.
2. A composition according to Claim 1, wherin the surfactant is a synthetic anionic surfactant and the composition contains a detergency builder.
3. A composition according to Claim 1, wherein the material yielding halite ions in aqueous media is sodium chlorite.
4. A composition according to Claim 1. wherein the amount of detersive surfactant with or without a detergency builder is from 15% to 99.5% by weight of the composition.
5. A composition according to Claim 1, wherein the amount of material yielding halite ions in aqueous media is from 0.5%
to 40% by weight of the composition.
to 40% by weight of the composition.
6. A composition according to Claim 1, wherein the composition, before use, contains, for each part by weight of the material yielding halite ions in aqueous media, less than about 0.4 parts by weight of a material which in aqueous media in the absence of ultra-violet light reacts to a substantial ex-tent with the halite ions.
B 492/497 (R)
B 492/497 (R)
7. A composition according to Claim 1, wherein the ratio of surfactant plus builder , when present, to the material yield-ing halite ions is at least about 3.5 : 1.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8012044 | 1980-04-11 | ||
| GB8012044 | 1980-04-11 | ||
| GB8012949A GB2074051A (en) | 1980-04-11 | 1980-04-11 | Coating of pipes with plastics material |
| GB8012949 | 1980-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1146833A true CA1146833A (en) | 1983-05-24 |
Family
ID=26275142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000375232A Expired CA1146833A (en) | 1980-04-11 | 1981-04-10 | Washing bar |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1146833A (en) |
-
1981
- 1981-04-10 CA CA000375232A patent/CA1146833A/en not_active Expired
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