WO1996012787A1

WO1996012787A1 - Concentrated liquid surfactant-containing compositions

Info

Publication number: WO1996012787A1
Application number: PCT/GB1995/002503
Authority: WO
Inventors: John Marshall
Original assignee: Jeyes Group Plc
Priority date: 1994-10-21
Filing date: 1995-10-23
Publication date: 1996-05-02
Also published as: AU3704195A

Abstract

A sealed container containing a unit dose of a liquid surfactant containing concentrate, which concentrate, on dilution with water, gives a diluted liquid product of similar or increased viscosity. The concentrate may further contain other active ingredients such as bleaching agents, disinfectants and conditioning agents. The concentrate may be adapted for application to hard surfaces such as sinks or floors or to soft surfaces such as fabrics, skin or hair.

Description

CONCENTRATED LIQUID SURFACTANT-CONTAINING COMPOSITIONS

This invention is concerned with improvements in and relating to liquid compositions and, more especially, to concentrates for dilution, with water, to produce liquid surfactant-containing compositions.

It is well known to provide so-called "thick" or "thickened" liquids compositions, that is compositions with generally increased viscosity, for application to surfaces. Such thick compositions have the advantage that, by virtue of their viscosity, they tend to remain in contact with vertical or inclined surfaces or other substrates for a longer period of time than do more mobile compositions. Thickened compositions may also be poured in a controlled manner and are generally aesthetically appealing.

It is also known to provide precursors for Liquid cleansing or like compositions (such as fabric softener compositions, all purpose cleaners, bleaches and washing up liquids) in the form of liquid concentrates to be diluted with water, to the desired concentration, by the user. However, on dilution with water, thick concentrates become thinner, ie. reduce in viscosity. We have found that a liquid concentrate for a thickened composition may be formulated in such a manner that its viscosity remains similar to or, preferably, increases on dilution with water, e.g. when diluted with water in a ratio of water to concentrate of at least 1:1, to give a viscosity of at least 50 cp at 25°C.

However, it is important when diluting such compositions to give the final desired end product, that dilution be relatively precise. Thus, whilst it is possible to formulate a composition which will give the desired end product at a particular dilution rate, variation of the dilution rate will lead to an imperfect product in terms of, for example, end viscosity, appearance such as cloud point, and of course, concentration of active ingredients. Accurate dilution is readily obtainable in a commercial installation but in domestic use one cannot rely upon the end user necessarily taking the appropriate steps to achieve acurate dilution.

The present invention provides a sealed container containing a unit dose of a liquid surfactant-containing concentrate, which concentrate, on dilution with water, in a specified ratio gives a diluted liquid composition of increased viscosity. The unit dose of the invention on dilution with tap water, irrespective of water hardness, temperature, etc. in a specified ratio (i.e. into a predetermined dilution vessel) gives a diluted liquid composition of increased viscosity. This achievement of correct viscosity after dilution is absolutely crucial. Over dilution or under dilution of active ingredients can always be compensated for by increased or reduced usage. Correct viscosity and stability, however, of the diluted product is essential for its proper performance e.g. accurate control of pouring/dispensing in use and ability to give effective contact times on vertical surfaces to give the required end result.

As discussed below in more detail, the unit dose of the invention is intended to make up a specific volume of final product and to this end, the unit dose will be arranged, by instruction to the user, to make up the concentrate to a specified final volume in an appropriate dilution vessel.

In addition to the above important advantages, the use of a unit dose of concentrate has major economic and environmental advantages. For example, the unit dose of concentrate reduces use of primary packaging and transportation units. Hence it is more economic in distribution; is easier for the housewife to carry home; takes up less space at home; allows use of the dilution vessel and so creates less waste.

The term "unit dose", as used herein, is intended to refer to a predetermined volume of concentrate intended to be diluted with a predetermined volume of water, whereby to provide a predetermined volume of diluted liquid composition of increased viscosity. The dilution may be effected by adding water to concentrate or vice versa and, where desirable, may be effected stepwise. Thus, the unit doses of the invention are "one-shot" doses, to be wholly used in one overall dilution operation. Typically, concentrates in accordance with the invention will be diluted with from 1 to 10 times, especially 2 to 5 times, and particularly about 3 times, their volume of water.

Suitably, the concentrate to be diluted will have viscosities of from 25 to 1000 cps, preferably 50 to 200 cps, especially 50 to 100 cps, as measured at 20°C. The composition obtained by diluting the concentrates will suitably have viscosities of from 250 to 5000 cps, preferably 350 to 800 cps, especially 400 to 600 cps, as measured at 20°C by means of a Brookfield LV viscometer using spindle 2 at an appropriate speed (depending on viscosity) e.g. 6, 12, 30 or 60 rpm. As will be appreciated the desired final viscosity will, to some extent, depend on the product, type, e.g. household b bleach or shampoo, which will have its own most appropriate range of viscosity.

The surfactant-containing compositions with which the invention is particularly concerned are liquid compositions intended for eventual application to a substrate to bring a surfactant into contact with that substrate, for example to cleanse it by detersive action and/or by germicidal or disinfectant action, or to condition it.

Thus, the present invention is concerned with compositions containing surface active agents as active ingredients and, also, with compositions containing other principal active ingredients, e.g. disinfectants, bleaching agents or conditioning agents. Thus, for example, the cleansing compositions may be for application to hard surfaces such as sinks, washbasins, baths, toilet bowls, walls or floors. The invention is also concerned with compositions for application to soft surfaces such as fabrics, skin or hair, and may, thus, take the form of a shampoo, conditioner, hand soap, bubble bath, shower gel, or like product. In accordance with another aspect of the invention, therefore, there is provided a method of treating a substrate (e.g. by way of cleaning, disinfecting or conditioning) which comprises forming a thickened liquid composition by dilution of a unit dose as defined above and applying that thickened composition to the substrate.

The concentrates employed in the invention are, by virtue of their relatively low initial viscosity, readily miscible with water whereby to more easily obtain a uniform end product.

A variety of surfactant-containing compositions may be formulated so as to give a product of about the same or increased viscosity upon dilution with water. One general class of such composition comprises one or more surfactants together with an electrolyte (and/or water-soluble or water-miscible non-surfactant compound and/or hydrotrope. In the case of such compositions the thickening of the diluted concentrate is effected by the presence of the specified surface active agents whose thickening effect, in the concentrate, is reduced by the presence of an excess of dissolved electrolyte or hydrotrope. Upon dilution of the concentrate, the concentration of dissolved electrolyte and/or hydrotrope is reduced and the surface active agent component is then capable of exerting its thickening effect.

One particularly preferred form of the above composition contains, as thickening component, (i) a surface active component consisting of an ether sulphate surface active agent alone or in admixture with another anionic surface active agent or a nonionic or amphoteric surface active agent, or a cationic surface active agent alone or in admixture with a nonionic surfactant; and (ii) an electrolyte and/or hydrotrope.

Suitable ether sulphates which may be used in in the above composition may be represented by the formula:

in which R is an alkyl group containing from 8 to 20 carbon atoms, preferably from 10 to 14 carbon atoms; M is eg. an alkali metal, ammonium or alkylolamine, cation, especially a sodium cation; and n is an integer from l to 6, preferably 2 to 4.

Other anionic surfactants which may be used in combination with the ether sulphates include alkylaryl sulphonates, alcohol sulphates, alkyl polyethoxy sulphates, phosphate esters, sulphosuccinates, sulphosuccinamates, α-sulpho-carboxylates and their esters, alkane sulphonates, olefin sulphonates, petroleum sulphonates, sarcosinates, taurates, isethionates, and soaps derived from natural or synthetic, saturated or unsaturated fatty acid having a ^c _ι 1_nU"^c _ιlo_o chain, such as sodium or potassium laurate, myristate, palmitate, oleate or stearate, or potassium or sodium soaps derived from coconut or tallow fatty acids. Particular examples of these classes of anionic surfactants include those sold under the trade names Eltesol SX30 (sodium xylene sulphonate) , Empicol LZ

(sodium lauryl sulphate) , Triton H55 (potassium phosphate ester) , Marlinat DF8 (sodium sulphosuccinate) , Hostapur SAS 3OX (sodium alkane sulphonate) , Hostapur OS

(sodium olefine sulphonate) , Petronate S (sodium petroleum sulphonate) , Hamposyl L30 (sodium lauroyl sarcosinate) , Fenopon T33 (sodium N-methyl-N-oleyl taurate) , and Fenopon AC 78 (sodium coconut isethionate) .

One particular class of non-ionic surfactants for use in combination with the ether sulphate surface active agents comprises the amine oxides of the formula:

R¹

R --- N --->0

in which R is a long chain straight or branched alkyl group, typically containing 8 to 20 carbon atoms; and each of the groups R is a lower alkyl group, typically containing 1-4 carbon atoms. Particular examples of this class of non-ionic surfactants are alkyl dimethyl amine oxides such as those sold under the trade names "Empigen OB" by Albright & Wilson or "Synprolam 50DMO" by ICI. Other classes of nonionic surface active agents which may be employed comprise polyalkoxylated fatty alcohols and their esters; polyalkoxylated fatty acids; polyalkoxylated alkyl phenols; alkanolamides; polyalkoxylated alkanolamides, glucosides, polyglucosides, sucrose and sugar esters, fatty esters, ethoxylated alkanolamides, ethoxylated long chain amines; alkyl amines, alkyl polyglucosides and alkyl polyglycosides. Particular examples of these classes of non-ionic surfactants are those sold under the trade names Synperonic A (alcohol ethoxylates) , Crodet L24 (polyoxyethylene-24-lauric acid) , Synperonic NP (nonyl phenyl ethoxylates) , Empilan CME (coconut monoethanolamide) , Triton CG110 (alkyl glucoside) , Glucam E10 (10 mole ethoxylate of methyl glucoside) , Crodesta SL 40 (sucrose cocoate) , Empilan MAA (ethoxylated coconut monoethanolamide) , Ethomeen C12 (ethoxylated coconut amine) , and Tagosoft 16B (cetyl isooctanoate) .

Suitable amphoteric surfactants for use in combination with the ether sulphate surfactants include alkyl betaines, alkyl aminopropionates, alkyl iminodipropionates; alkyl glycinates; carboxyglycinates; alkyl imidazolines sulphobetaines; alkyl polyaminocarboxylates; polya phocarboxyglycinates; sodium N-coco-aminopropionate, disodium N-coco-iminodiproprionate, and cocoglycinate. Particular examples of such amphoteric surfactants are those sold under the trade names Tegobetain A4080 (alkyl dimethyl betaine) , Ampholax XCU (coco-amphoglycolate) , Amphotensid CT (alkyl imidazoline based amphoteric) , Ampholax XCO 30 (coco-amphocarboxyglycinate) and Sandobet SC (cocoamide-sulphobetaine) .

Suitable cationic surfactants for use in the concentrates used in the invention include alkyl quaternary ammonium halides; primary, secondary and tertiary amines and their salts; and polyamines. Particular examples of such cationic surfactants are those sold under the trade names Empigen BAC (alkyl dimethyl benzalkoniu chloride) , Armac T (tallow amine acetate-amine salts) , Synprolam 35N3 (N-alkyl propane propane diamine) , and Synprolam 35X10 (10 mole ethoxylated primary amine) .

The nonionic surfactants for use in combination with the cationic surfactant may be a nonionic surfactant as described above for use in combination with the ether sulphates.

The concentration of the surfactant component in the concentrate depends upon two principal factors, (i) the concentration of surfactant component required to give a thickened end product of the desired viscosity and (ii) the degree of dilution contemplated. The former will depend upon the nature of the surfactant or the surfactant combination but is typically from 0.5 to 30% by weight, more especially 2 to 10% by weight, particularly 2 to 5% by weight. With regard to the dilution factor, a dilution of from 1 to 10 times, preferably 2 to 5 times, especially about 3 times, has been found useful. Accordingly a typical concentration of surfactant in the concentrate is from 1 to 90% by weight, more especially 6 to 30% by weight.

In accordance with one preferred embodiment of the invention the concentrate comprises:

(i) up to 15% by weight of a surfactant component consisting of one or more anionic surfactants alone or in admixture with one or more nonionic or amphoteric surfactants;

(ii) an electrolyte and/or hydrotrope; and

(iii) water.

In this case it is often preferred that the anionic surfactant form the major part (i.e. greater than 50% by weight) of the surfactant component, the concentration of the total surfactant component in the concentrate is up to 15% by weight; preferably 2 to 10% by weight, typically from 5.5 to 9.5% by weight thereof. The electrolyte used in the composition will typically be sodium chloride (which is in itself a component of one important cleansing agent, sodium hypochlorite bleach) but, of course, other water-soluble electrolytes may be employed, including builders such as sodium carbonate, sodium phosphates and alkali metal silicates, alkaline builders and acids and alkalis. The amount of electrolyte required to give the desired effect is something which may be established by simple experimentation but, in general, it has been found that concentrations, in the concentrate, of about 10% by weight or more are useful, typically giving rise to final concentrations of about 3.5% by weight or more.

Examples of suitable hydrotropes which may be used include lower alkyl (e.g. --C., alkyl) substituted aryl surfactants such as sodium cumene sulphonate or sodium xylene sulphonate. Co-solvents may also be employed, e.g. alcohols such as methanol, ethanol and isopropanol, and ethers such as glycol ethers.

Where the principal surfactant component comprises a cationic surfactant which is a quarte nary ammonium compound, this may conveniently be used in conjunction with a hydrotrope as described above. In this case no nonionic surfactant is necessary (although it may optionally be present) and the total level of quarternary ammonium surfactant in the formulation is from 0.1 to 60% by weight; preferably from 0.1 to 10% by weight; that of aryl sulphonate being from 0.1 to 60% by weight, preferably 1 to 5% by weight.

Other liquid surfactant compositions which may be used as concentrates in accordance with the invention are described in EP-A-0314232 and comprise (i) a primary surfactant material which comprises one or more agents selected from amine, amine oxide, betaine and quaternary ammonium surfactants; (ii) co-surfactant material which is a hydrotrope for the primary surfactant material; (iii) one or more electrolytes; and (iv) water. Further liquid surfactant compositions which may be used as concentrates in accordance with the invention are disclosed in WO95/02664.

By virtue of the provision of the thickening surfactant system, eventual diluted products obtained from the concentrates of the invention will often possess cleansing, detersive, softening or conditioning powers. However, the presence of other active materials in the compositions of the invention is entirely possible. One class of such other ingredients are bleaches, especially alkali metal hypochlorite bleaches. Thus, compositions in accordance with the invention may be formulated to give, upon dilution, an effective thickened bleach product and in this case the concentrate suitably contains the bleach in an amount sufficient to give, in the diluted product, from 0.l to 10% by weight available chlorine. The bleach may also serve as an ancilliary component, for example in a toilet or general purpose cleaner, and in this case suitably present in an amount to give from 0.1 to 6% by weight available chlorine in the diluted product. Other bleaches such as peroxide bleaches (e.g. hydrogen peroxide) and other halogen or oxygen release bleaching agents may be employed in appropriate concentrations. Hypochlorite bleaches themselves contain electrolytes, such as sodium chloride or sodium chlorate, so that when using bleaches electrolytes present therein can provide all or a part of the desired electrolyte component of the composition.

Other active ingredients which may be present include non-bleaching germicides or disinfectants and weak or strong acids which may serve as limescale removing agents e.g. glycollic acid, citric acid, hydrochloric acid, sulphamic acid and sulphuric acid. These acids may also serve to provide some or all of the electrolyte, as indeed may comparable alkaline cleaning agents. For hair or skin treatment, the composition may contain, as active ingredients, silicone surfactants, polymeric quaternary compounds, and/or protein-based surfactants. Particular example of such ingredients are Abil B9405 (polysiloxane polydimethyl dialkyl ammonium acetate copolymer) and Lameper 5 (potassium coco hydrolysed animal protein) . Surface cleaning compositions may also contain solvents such as butyl dioxitol or aliphatic hydrocarbons. In general, any solvent employed should, at 25°C (a) have a molar volume below about 200 cc/g.mol; (b) a polarity parameter of 0 to about 3 (Cal/cc)¹'², and (c) a hydrogen bonding parameter of about 6 (Cal/cc) ^l ' ² .

In addition to active ingredients, compositions in accordance with the invention may also contain colouring agents, such as dyestuffs, fragrances, or sequestrants.

The sealed container, containing the concentrate, may take any of a wide variety of forms and thus, for example, may be a glass, metal or plastics container with a sealed screw or other eventually releasable cap such as a bung or cork; or a sachet. In use, the whole contents of the sealed container are diluted with water. This may be achieved for example by placing the contents of the container in a dilution vessel and diluting with an appropriate quantity of water or vice versa, i.e. adding to the contents of the container to water in a dilution vessel. To assist the user, such a dilution vessel conveniently takes the form of a glass or plastics container provided with a releasable cap (e.g. a screw cap, cork or bung) and having the appropriate volume for dilution of a predetermined quantity of concentrate as contained in the sealed container. The concentrate container and dilution used may be sold together as a combination, to assure proper and appropriate dilution.

In use, the contents of a sealed container are placed in the dilution vessel and then diluted with water (generally to fill or make up to an appropriately recommended level on the dilution container) . The dilution container is then sealed and shaken to thoroughly mix concentrate and water, thereby to provide the user with an appropriate quantity of suitably thickened composition. As will be appreciated, the sealed containers of the invention are particularly suitable for domestic or like use, making it possible for the purchaser to obtain suitable quantities of thickened composition whilst only purchasing relative small lots of concentrate. The concentrate also lends itself to transportation, in that no unnecessary water is required, and to industrial use.

Suitably, for domestic use, a sealed container in accordance with the invention will contain, as unit dose of liquid concentrate, from 5 to 12500ml thereof, preferably 25 to 2500ml thereof, especially 50 to 1200ml thereof. Typical specific volumes of unit dose of concentrate are 125, 250, 500ml. Such specific unit doses may, for example, be used to make up total volumes of thickened diluted concentrates of 500, 1000, 2000ml, respectively. For industrial use, the sealed container may, for example, take the form of a can, drum or tanker for later dilution with water in a single overall operation in appropriate apparatus.

In order that the invention may be well understood the following Examples of concentrates for use in accordance with the invention are given by way of illustration only.

In the Examples all surfactant contents are expressed in terms of 100% actively unless otherwise stated (i.e. the amount quoted are true amounts of active surfactant) . Further, in the Examples all parts and percentages are by weight, unless otherwise stated, except for sodium hypochlorite concentrations which are expressed in terms of available chlorine.

Examples 1-3 Bleach Formulations

Examples

1 2 3

sodium hypochlorite 9.99% 9.93% 9.83% lauryl ether sulphate 1.65 4.73 5.67 myristyl dimethyl amine oxide 3.73 0.88 0.00

Perfume 0.10 0.10 0.10

Soft water to 100.0 to 100.0 to 100.0

Viscosity of concentrate, cps 41 91 94

Viscosity of diluted concentrate (1:2) cps 817 232 373

These formulations were put up in 250 ml bottles for eventua dilution to 750 ml.

Example 4

Liquid Toilet Cleaner % w/w

soft water to 100.00 sodium chloride 17.20 lauryl dimethyl amine oxide 1.02 lauryl ether sulphate 7.56 perfume 0.60 colour qs

Viscosity of concentrate, cps 191

Viscosity of 1:3 diluted product cps 372

This formulation was put up in 125 ml sachets for eventual dilution to 500 ml.

Example 5

Liquid toilet cleaner with bleach % w/w

Soft water to 100.00

Sodium hypochlorite 8.50 lauryl ether sulphate 7.37 lauryl dimethyl amine oxide 0.63

Perfume 0.50

Colour qs

Viscosity of concentrate, cps 184

Viscosity of 1:2 diluted product, cps 325

This cleaner was put up in 250 ml sealed cap bottles for eventual dilution to 750 ml. Example 6 - 11

Compositions having the formulations given below had the viscosities noted

£ 1 fi 2 10 ϋ Sodium lauryl ether sulphate 5.40 8.10 4.05 5.40 4.05 6.75

Sodium lauroyl sarcosinate 1.50

Alkyl dimethyl amine oxide 1.25

Sodium alkane sulphonate 1.50

Alkyl amido betaine 1.50

Sodium lauryl sulphate 1.50

Coconut diethanolamide 1.50

Electrolyte* 18.00 18.00 18.00 18.00 18.00 18.00

Water to 100 to 100 to 100 to 100 to 100 to 100

Viscosity of concentrate 244 312 10 78 108 163

(cps) Viscosity of 1:2 dilution 795 2160 470 >5000 470 604

(cps)

^♦comprises a 13:5 mixture of NaCl: MgSO .7H 0.

These composition were put up in 500 ml sealed cap containers for eventual dilution to 1500 ml. Example 12

A composition having the formulation given below had the viscosities noted

(% w/w)

Sodium lauryl sarcosinate 1.50

Arquad HT50* 12.00

Electrolyte** 18.00

Water to 100

Viscosity of concentrate, cps 590

Viscosity of 1:2 dilution, cps 1333

* contains 50% tallow trimethyl ammonium chloride

** consists of 13:5 mixture of NaCl: MgS0₄-7H₂0.

The composition was put up in 250 ml bottles for eventual dilution to 750 ml.

Examples 13-15

Fabric softener concentrates ii ii ϋ

<%w/w) (%w/w) (%w/w)

Caflon FS 75* 42.7 42.7 42.7 Arquad HT50 23.7 23.7 23.7 Jaquar C-135** 0 0.5 1.0 Fragrance 2.85 2.85 2.85 Colour qs qs qs Opacifier 0.10 0.10 0.10 Soft water ad 100 ad 100 ad 100

Viscosity of concentrate (cps) 89 94 102 Viscosity of 1:4 dilution (cps) 264 318 431

* 75% 1-methyl-2-alkyl-3-alkylamidoethy1-imidazolinium methosulphate + 25% isopropanol ** Natural polysaccharide ex Rhone Poulenc.

These compositions were put up into 100 ml sachets for eventual dilution to 500 ml. Example 16

Bactericidal Hand Soap Concentrate

%w/w

Coconut diethanolamide 1.67

Sodium lauryl ether sulphate 2 mole 16.66

Alkyl amido betaine 5.40

Diquaternary-polydimethyl disiloxane 1.07

Preservative qs

Pearlising agent/opacifier 1.00

Fragrance 0.65

Triclosan 0.40

Sodium Chloride 13.50

Water to 100.00

Viscosity of concentrate, cps 442

Viscosity of 1:2 dilution, cps 820

This composition was put up in 50 ml sachets for eventual dilution to 150 ml, as were the compositions of Examples 17 and 18 below.

Example 17 %w/w

Tallow trimethyl ammonium chloride 3.0

Sodium cumene sulphonate 1.50

Water to 100

Viscosity of concentrate, cps 83

Viscosity of 1:2 dilution, cps 2025 Example 18 - Disinfectant formulation

%w/w

Tallow trimethyl ammonium chloride 7.30 Sodium cumene sulphonate 3.92

Benzalkonium chloride 1.00

Perfume 0.60

Colour qs

Soft water to 100

Viscosity of concentrate, cps 73

Viscosity of 1:2 dilution, cps 288

Examples 19-23 (Bleaches)

19 20 21 22 23

Sodium hypochlorite 9.5 9.5 9.5 9.5 9.5 Sodium lauryl ether sulphate 2 mole 4.86 1.89 2.16 5.13 3.51 Myristyl dimethyl amine oxide 0.75 3.5 3.25

Lauryl dimethyl amine oxide 0.75 2.0

Soft water to 100 to 100 to 100 to 100 to 100

Viscosity cone, cps 124 49 67 101 88 Viscosity 1:2 dilution, cps 338 >500 >500 340 475

The bleach compositions of Examples 19-23 (and 24-27 below) were put up in 500 ml sealed cap bottles for eventual dilution to 1500 ml. Examples 24-27 (Bleaches)

24 25 26 27

Sodium hypochlorite 9.5 9.5 9.5 9.5 Sodium lauryl ether sulphate 2 mole 4.32 2.70

Sodium lauryl ether sulphate 3 mole 4.59 3.78

Lauryl dimethyl amine oxide 1.25 2.75 1.0 1.75

Soft water to 100 to 100 to 100 to 100

Viscosity cone, cps 211 115 110 38 Viscosity 1:2 dilution, cps 422 432 192 317

The composition of Examples 28 to 37 were put up into 250 ml sealed cap plastic bottles for eventual dilution to

750 ml.

Examples 28 - 31 28 29 30 31

Sodium lauryl ether sulphate 2 mole 9.45 5. .40 6. .75 1. .35

Myristyl dimethyl amine oxide 1.25 1. .25 1. .25 5. .00

Electrolyte** 18.0 18. .0 18. .0 18. .0

Soft water to 100 to 100 to 100 to 10

Viscosity cone, cps 402 144 252 2020 Viscosity 1:2 dilution, cps 3470 190 352 3310

** 13.5 mixture of NaCl: MgSO..7H_0

Examples 32 - 34 32 33 34

Sodium lauryl ether sulphate 2 mole 1.4 2.7 4.1 Alkyl amido betaine 1.5 1.5 1.5

Electroyte** 18.0 18.0 18.0

Soft water to 100 to 100 to 100

Viscosity cone, cps 63 46 67 Viscosity 1:2 dilution, cps 189 284 952 Examples 35 - 37 35 36 37

Sodium lauryl ether sulphate 2 mole 6. .80 8. .10 9. .50

Alkyl amido betaine 1. .5 1. .5 1, .5

Electroyte** 18. .0 18. .0 18. .0

Soft water to 100 to 100 to 100

Viscosity cone, cps 136 174 272 Viscosity 1:2 dilution, cps >5000 >5000 >5000

** 13:5 mixture of NaCl: MgS0₄.7H₂0.

Examples 38 and 39

11 I Sodium lauryl ether sulphate 2 mole 6.8 9.5 Cocoamphocarboxyglycinate 1.5 1.5 Electrolyte** 18.0 18.0 Soft water to 100 to 100

Viscosity cone, cps 163 290

Viscosity 1:2 dilution, cps 604 1413

** 13:5 mixture of NaCl: MgS0₄.7H₂0

The composition of Examples 38 and 39 were filled in 100 ml sachets for eventual dilution to 300 ml. Examples 40 and 41 40 41

Sodium salt of polymeric carboxylate 0 2.0

Sodium lauryl ether sulphate 2 mole 8.75 8.75

Soft water to 100 to 100

Viscosity cone, cps 452 107

Viscosity 1:2 dilution, cps 712 685

* Supplied as Dispex N40 ex Allied Colloids.

The composition of Examples 40 and 41 were put up in 50 sachets for eventual dilution to 150 ml.

Claims

CLAIMS :

l. A sealed container containing a unit dose of a liquid surfactant containing concentrate, which concentrate, on dilution with water, gives a diluted liquid product of similar or increased viscosity.