EP0693548B1 - A stable concentrated premix and its use for manufacturing aqueous detergent compositions - Google Patents

A stable concentrated premix and its use for manufacturing aqueous detergent compositions Download PDF

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Publication number
EP0693548B1
EP0693548B1 EP94202726A EP94202726A EP0693548B1 EP 0693548 B1 EP0693548 B1 EP 0693548B1 EP 94202726 A EP94202726 A EP 94202726A EP 94202726 A EP94202726 A EP 94202726A EP 0693548 B1 EP0693548 B1 EP 0693548B1
Authority
EP
European Patent Office
Prior art keywords
premix
weight
water
alkyl
mixtures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94202726A
Other languages
German (de)
French (fr)
Other versions
EP0693548A1 (en
Inventor
Sergio Barbarino
Lamberto Biscarini
Panos Iakovides
Raffaele Pinna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Procter and Gamble Co
Original Assignee
Procter and Gamble Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/US1994/008089 external-priority patent/WO1995003383A1/en
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Priority to PT94202726T priority Critical patent/PT693548E/en
Priority to CA002153354A priority patent/CA2153354C/en
Publication of EP0693548A1 publication Critical patent/EP0693548A1/en
Application granted granted Critical
Publication of EP0693548B1 publication Critical patent/EP0693548B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • C11D1/143Sulfonic acid esters
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • C11D1/146Sulfuric acid esters
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/825Mixtures of compounds all of which are non-ionic
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/83Mixtures of non-ionic with anionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/395Bleaching agents
    • C11D3/3956Liquid compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/04Carboxylic acids or salts thereof
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/14Sulfonic acids or sulfuric acid esters; Salts thereof derived from aliphatic hydrocarbons or mono-alcohols
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/75Amino oxides
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10Objects to be cleaned
    • C11D2111/14Hard surfaces

Definitions

  • the present invention relates to a process for manufacturing aqueous detergent compositions suitable for household applications and to a stable concentrated premix used in said process.
  • Liquid detergent compositions comprising surfactants and water-insoluble materials such as perfumes, fatty acids and/or soaps are well known in the art.
  • compositions can be made by a variety of processes wherein for example the different ingredients are incorporated in said compositions at different process steps.
  • Such processes for manufacturing aqueous detergent compositions are not fully satisfying. Indeed, a problem encountered with such fully formulated compositions is the cost of their overall sourcing, e.g. it is often needed to supply different locations with said fully formulated compositions thus having to handle and ship big volumes. Accordingly, there is a need for the development of processes for manufacturing aqueous detergent compositions sourced in the most economical way.
  • a stable concentrated premix is prepared, said premix comprising most of the active ingredients of the finished detergent compositions.
  • a stable concentrated premix is prepared by mixing, under alkaline conditions, a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, together with water-insoluble materials such as perfumes, soaps, fatty acids.
  • a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, together with water-insoluble materials such as perfumes, soaps, fatty acids.
  • the present invention is based on the surprising finding that a stable premix can be formulated with a high concentration of actives, including water-insoluble materials, this even without any added water, i.e. other than the water coming from the raw material used.
  • a premix in the process of the present invention for manufacturing an aqueous detergent composition allows great flexibility in the production chain while also reducing the sourcing cost.
  • said premix may advantageously be manufactured in only one site of production and then shipped to the various desired sites, e.g. countries, where said premix may then be turned in the desired finished product by simple dilution.
  • the volume to handle and ship for a given amount of active ingredients is reduced.
  • An advantage of the stable concentrated premix of the present invention which comprises a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, is that said premix incorporates high amount of water-insoluble materials, this without the need of any hydrotrope or any solubilizer.
  • Another advantage of the stable concentrated premix of the present invention is that they have good physical stability properties, even across a wide range of temperature, e.g. from 0°C to 50°C.
  • GB-1329086 discloses conventional methods of making detergent compositions wherein the perfume is solubilized with the aid of a specific surface active agent, an amine oxide or long chain betaine.
  • This patent application does not disclose a process for manufacturing aqueous detergent compositions, wherein a stable concentrated premix comprising a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, together with water-insoluble materials is prepared.
  • DE-A-40 25 065 discloses concentrated compositions comprising water, an alkyl glycoside, a long chain alkyl sulphate and a short chain alkyl sulphate.
  • DE-A-42 37 178 discloses concentrated compositions comprising a short chain alkyl oligo alkoxylate and a long chain alkyl oligo alkoxylate.
  • US 5, 196, 146 discloses a concentrate for making a formulation for remoring oil and grease from a surface comprising an alkoxylated diphenyl oxide sulfonate surfactant and water.
  • the present invention encompasses a process for manufacturing an aqueous detergent composition comprising from 0.5% to 10% by weight of the total composition of a surfactant being a C 6 -C 10 alkyl sulphate or C 6 -C 10 alkyl sulphanate or mixtures thereof, and from 0.1% to 2% by weight of the total composition of a water-insoluble material, or mixtures thereof, said process comprising the steps of:
  • the present invention encompasses a stable concentrated premix having a pH greater than 10 and comprising at least a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, and at least a water-insoluble material.
  • stable it is to be understood herein that the concentrated premix of the present invention does not substantially separate into distinct layers, upon standing for at least 8 weeks at 25 °C.
  • concentration it is to be understood herein that the level of water present in said premix is from 55% to 86% by weight, preferably from 60% to 85% by weight and more preferably from 65% to 80%.
  • the premix of the present invention comprises at least a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, or mixtures thereof.
  • a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, or mixtures thereof.
  • Such surfactants are able to boost the cleaning performance of any composition comprising them.
  • suitable surfactants having from 6 to 10 carbon atoms in their hydrophobic portion are C 6 -C 10 alkyl sulphates (C 6 -C 10 SO 4 ), and alkyl sulphonates (C 6 -C 10 SO 3 ).
  • the premix according to the present invention may comprise any of the above surfactants alone, or any combination thereof, depending on the end use envisioned.
  • Preferred surfactants for use herein are the C6-C8 alkyl sulphates and C 6 -C 8 alkyl sulphonates.
  • Such anionic surfactants can be made by well known sulphation or sulphonation processes followed by neutralization, but said anionic surfactants are more conveniently commercially available, for instance from Rhone Poulenc under the trade name Rhodapon® OLS, or from Witco under the trade name Witconate®.
  • the most preferred surfactant for use herein is octyl sulphate.
  • Suitable surfactants for use herein are preferably hypochlorite compatible.
  • the stable concentrated premix of the present invention comprises more than 6% by weight of the total premix of a surfactant as defined herein, or mixtures thereof, preferably from 6.1% to 15%, more preferably from 6.5% to 12% and most preferably from 6.5% to 10% by weight.
  • the premix of the present invention comprises at least a water-insoluble material, or mixtures thereof.
  • water-insoluble material it is to be understood herein any component that is not miscible to water at ambient temperature, i.e. from 20°C to 25°C. In other words incorporating said given component in water at ambient temperature will result in a precipitation of said component in said medium.
  • the premix of the present invention comprises from 0.1% to 4% by weight of the total premix of a water-insoluble material, or mixtures thereof, preferably from 0.5% to 3% by weight and more preferably from 1% to 2.5% by weight.
  • Suitable water-insoluble materials to be used herein include the following classes of compounds, soaps and/or fatty acids or perfumes, or colorants, or dyes or mixtures thereof.
  • Suitable fatty acids to be incorporated in the premix of the present invention include alkali metal salts of a C 8 -C 18 fatty acid.
  • Suitable fatty acids for use herein can be any C 8 -C 18 fatty acid, preferably fully saturated, preferably a sodium, potassium or lithium salt, more preferably the sodium salt.
  • Suitable fatty acids may be selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid and mixtures of fatty acids suitably hardened, derived from natural sources such as tallow, coconut oil, ground oil and babassu oil. Said fatty acids may be used as an additional thickening aid and as suds suppressers.
  • the premix according to the present invention comprises from 0.5% to 4%, preferably from 1% to 3% by weight of the total premix of fatty acids.
  • Suitable perfumes to be incorporated in the premix of the present invention include a perfume as is as well as a perfume blend.
  • Preferred perfumes to be used herein are bleach stable perfumes, especially when said premix is used as raw material in the process of the present invention for manufacturing an aqueous detergent composition comprising bleaches.
  • the premix herein comprises of from 0.2% to 2% by weight of the total premix of said perfume and preferably of from 0.5% to 1%.
  • a further essential feature of the present invention is the alkalinity of said premix.
  • alkalinity plays an important role in the premix stability.
  • the premix of the present invention has a pH as is greater than 10, preferably greater than 11, more preferably greater than 12. This is achieved by the addition of from 0.5% to 6% by weight of the total premix of a caustic alkali or mixtures thereof and preferably of from 1.5% to 3%.
  • Suitable caustic alkalis for use herein include sodium and/or potassium hydroxide.
  • the stable concentrated premix of the present invention may further comprise other ingredients such as long chain amine oxides.
  • other ingredients such as long chain amine oxides.
  • the premix according to the present invention may be used as a raw material in order to provide aqueous detergent compositions having particular properties, such as viscous compositions.
  • Preferred long chain amine oxides are according to the formula R 1 R 2 R 3 NO where R 1 is primarily a C 12 -C 18 alkyl group and R 2 and R 3 are C 1 to C 3 alkyl groups and even more preferred is to use a mixture of said long chain amine oxides.
  • long chain amine oxides for use herein can be Genaminox R LA, Gemaminox R MY-X (available from Hoechst), C 12 -C 14 Aromox R DMMCO-W, (AKZO), Aromox DM14D-W, (AKZO) and Aromox DM14D-W (AKZO).
  • Suitable long chain surfactants for use herein are preferably hypochlorite compatible.
  • Particularly suitable to be used herein is a mixture of said long chain amine oxides, more specifically a mixture of a C 14 chain amine oxide with a C 12 chain amine oxide or a C 16 chain amine oxide, with a ratio of said C 14 chain amine oxide to said C 12 chain amine oxide of from 0.3 to 10 and a ratio of said C 14 chain amine oxide to said C 16 chain amine oxide of from 0.2 to 4.5.
  • the stable concentrated premix according to the present invention comprises from 0% to 12% by weight of the total premix of said long chain amine oxide, or mixtures thereof. If present said long chain amine oxide are preferably at a level of from 5% to 10% and more preferably of from 6% to 8% by weight of the total premix.
  • the stable concentrated premix of the present invention may further comprise other optional ingredients such as silicates, silicones, other long chain surface-active agents.
  • Suitable long chain surface-active agents include organic surface-active agents selected from anionic, nonionic, cationic, and zwitterionic surface-active agents and mixtures thereof and preferred herein are alkyl sarcosinates, paraffin sulphonates, alkyl sulphates and alkyl ether sulphates.
  • Highly preferred optional ingredients are C12 to C14 alkyl sulphates such as sodium dodecyl sulphate or sodium lauryl sulphate.
  • the stable concentrated premix of the present invention may also comprise a bleaching agent, as an optional highly preferred ingredient.
  • Bleaching agent as mentioned herein includes hypochlorite bleaching agent and preferably an alkali metal hypochlorite. Although alkali metal hypochlorites are preferred, other hypochlorite compounds may also be used herein and can be selected from calcium and magnesium hypochlorite. Preferred alkali metal hypochlorite for use herein is sodium hypochlorite.
  • the premix according to the present invention comprises said hypochlorite bleaching agent, such that the content of active chlorine in the composition is from 0% to 8% and preferably from 0% to 3.5%. According to the present invention the ingredients of the premix are selected so that said premix is hypochlorite compatible.
  • An advantage of the present invention is that said stable concentrated premix can be used as a raw material suitable to allow the formulation of fully formulated detergent compositions. Accordingly said premix constitutes up to 40% by weight of said detergent composition, preferably from 15% to 40% and more preferably from 25% to 35%.
  • the present invention encompasses a process for manufacturing an aqueous detergent composition, said process comprising the step of preparing a stable concentrated premix as defined herein before. Said process further comprises a dilution step where said premix is diluted with water.
  • the extent of dilution is at the discretion of the process operator and depends on the aqueous detergent composition desired. Indeed, the process of the present invention allows to manufacture a wide range of aqueous detergent compositions including highly concentrated compositions to non-concentrated compositions, depending on the dilution levels.
  • the aqueous detergent composition is diluted in the process of the present invention until the aqueous detergent composition obtained herein has a concentration of surfactants having from 6 to 10 carbon atoms in their hydrophobic portion, of from 0.5% to 10% by weight of the total detergent composition, preferably of from 1% to 6% and more preferably of from 2% to 5%.
  • the aqueous detergent composition obtained with the process of the present invention comprises from 0.1% to 2% by weight of the total detergent composition of water-insoluble material, or mixtures thereof, preferably from 0.5% to 2% and more preferably from 1% to 1.5%.
  • the dilution stage is conducted at or around ambient temperature.
  • the dilution water often has a temperature of from 15°C to 35° C.
  • the step of preparing the premix is conducted by simply adding in lukewarm to warm water (i.e. of from 35°C to approximately 45°C) all of the desired ingredients, i.e. surfactants as defined herein before with water-insoluble materials and the optional ingredients, e.g. silicates and/or long chain surfactants, if present, this in presence of caustic to raise the pH above 10 and while stirring.
  • the surfactants having from 6 to 10 carbon atoms in their hydrophobic portion are added ahead of the low water solubility ingredients.
  • said bleaching agent is preferably added as the last ingredient in said process, thereby ensuring longest possible market life for said compositions.
  • the perfumes and/or colorants and/or dyes are preferably added during or after the dilution step, thereby ensuring great flexibility in adapting the aqueous detergent compositions to different market places.
  • the aqueous detergent compositions obtained according to the process of the present invention may be used for a variety of cleaning purposes in any hard surfaces application including toilet bowl cleaning, in dishwashing applications, including hand dishwashing as well as washing with automatic dishwashing machines. Said compositions are suitable to be used as a pretreatment composition for treating dishes especially pans, pots kitchen grills and/or any kitchenware soiled by though food stains/encrustations.
  • the above mentioned premix were prepared by simply mixing in warm water (about 45°C) the surfactants comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10.
  • the resulting mix was maintained at this temperature while pre-melted fatty acid was added with stirring. This was followed by addition of caustic soda and perfume under agitation. After a few minutes of stirring to ensure complete dissolution of the water-insoluble materials, the long chain surfactants (e.g. amine oxide) were added if desired.
  • the resulting premix was allowed to stir for another 30 minutes.
  • premix were diluted with water to yield aqueous detergent compositions, i.e. the finished products. Indeed, the above premix were diluted with water at 1:3 ratio (three parts of water for each part of premix).

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Abstract

The present invention relates to a stable concentrated premix comprising water-insoluble materials and surfactants comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10. More specifically a process for manufacturing an aqueous detergent composition comprising the step of preparing said stable concentrated premix is disclosed, said process allowing good production flexibility at reduced costs.

Description

    Technical Field
  • The present invention relates to a process for manufacturing aqueous detergent compositions suitable for household applications and to a stable concentrated premix used in said process.
  • Background of the Invention
  • Liquid detergent compositions comprising surfactants and water-insoluble materials such as perfumes, fatty acids and/or soaps are well known in the art.
  • Such compositions can be made by a variety of processes wherein for example the different ingredients are incorporated in said compositions at different process steps. Such processes for manufacturing aqueous detergent compositions are not fully satisfying. Indeed, a problem encountered with such fully formulated compositions is the cost of their overall sourcing, e.g. it is often needed to supply different locations with said fully formulated compositions thus having to handle and ship big volumes. Accordingly, there is a need for the development of processes for manufacturing aqueous detergent compositions sourced in the most economical way.
  • It is thus an object of the present invention to provide a process for manufacturing aqueous detergent compositions comprising a surfactant and water-insoluble materials, said process allowing cheaper and easier sourcing.
  • We have now found that this object can be met by including in a process for manufacturing an aqueous detergent composition, a step wherein a stable concentrated premix is prepared, said premix comprising most of the active ingredients of the finished detergent compositions. Indeed, in the process of the present invention a stable concentrated premix is prepared by mixing, under alkaline conditions, a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, together with water-insoluble materials such as perfumes, soaps, fatty acids. Such a premix is then diluted to obtain the desired aqueous detergent composition. In its broadest aspect, the present invention is based on the surprising finding that a stable premix can be formulated with a high concentration of actives, including water-insoluble materials, this even without any added water, i.e. other than the water coming from the raw material used. The use of such a premix in the process of the present invention for manufacturing an aqueous detergent composition allows great flexibility in the production chain while also reducing the sourcing cost. Indeed, said premix may advantageously be manufactured in only one site of production and then shipped to the various desired sites, e.g. countries, where said premix may then be turned in the desired finished product by simple dilution. Also, according to the process of the present invention the volume to handle and ship for a given amount of active ingredients is reduced.
  • An advantage of the stable concentrated premix of the present invention which comprises a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, is that said premix incorporates high amount of water-insoluble materials, this without the need of any hydrotrope or any solubilizer.
  • Another advantage of the stable concentrated premix of the present invention is that they have good physical stability properties, even across a wide range of temperature, e.g. from 0°C to 50°C.
  • GB-1329086 discloses conventional methods of making detergent compositions wherein the perfume is solubilized with the aid of a specific surface active agent, an amine oxide or long chain betaine. This patent application does not disclose a process for manufacturing aqueous detergent compositions, wherein a stable concentrated premix comprising a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, together with water-insoluble materials is prepared.
  • DE-A-40 25 065 discloses concentrated compositions comprising water, an alkyl glycoside, a long chain alkyl sulphate and a short chain alkyl sulphate.
  • DE-A-42 37 178 discloses concentrated compositions comprising a short chain alkyl oligo alkoxylate and a long chain alkyl oligo alkoxylate.
  • US 5, 196, 146 discloses a concentrate for making a formulation for remoring oil and grease from a surface comprising an alkoxylated diphenyl oxide sulfonate surfactant and water.
  • Summary of the Invention
  • The present invention encompasses a process for manufacturing an aqueous detergent composition comprising from 0.5% to 10% by weight of the total composition of a surfactant being a C6-C10 alkyl sulphate or C6-C10 alkyl sulphanate or mixtures thereof, and from 0.1% to 2% by weight of the total composition of a water-insoluble material, or mixtures thereof, said process comprising the steps of:
  • - preparing under alkaline conditions a stable concentrated premix having a pH greater than 10 and comprising from 0.1% to 4% by weight of the total premix of a water-insoluble material, or mixtures thereof, more than 6% by weight of the total premix of said surfactant and from 55% to 86% by weight of the total premix of water, wherein said premix is prepared by adding in warm water of a temperature of from 35°C to 45°C, said surfactant, said water-insoluble material and optionally optional ingredients while stirring;
  • - diluting said premix in water to obtain said detergent composition.
  • Detailed Description of the Invention
  • The present invention encompasses a stable concentrated premix having a pH greater than 10 and comprising at least a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, and at least a water-insoluble material. By "stable" it is to be understood herein that the concentrated premix of the present invention does not substantially separate into distinct layers, upon standing for at least 8 weeks at 25 °C. By "concentrated" it is to be understood herein that the level of water present in said premix is from 55% to 86% by weight, preferably from 60% to 85% by weight and more preferably from 65% to 80%.
  • As a first essential element, the premix of the present invention comprises at least a surfactant comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10, or mixtures thereof. Such surfactants are able to boost the cleaning performance of any composition comprising them.
  • Accordingly, suitable surfactants having from 6 to 10 carbon atoms in their hydrophobic portion, for use herein are C6-C10 alkyl sulphates (C6-C10SO4), and alkyl sulphonates (C6-C10SO3).
  • All these surfactants are well known in the art. The premix according to the present invention may comprise any of the above surfactants alone, or any combination thereof, depending on the end use envisioned.
  • Preferred surfactants for use herein are the C6-C8 alkyl sulphates and C6-C8 alkyl sulphonates. Such anionic surfactants can be made by well known sulphation or sulphonation processes followed by neutralization, but said anionic surfactants are more conveniently commercially available, for instance from Rhone Poulenc under the trade name Rhodapon® OLS, or from Witco under the trade name Witconate®.
  • The most preferred surfactant for use herein is octyl sulphate. Suitable surfactants for use herein are preferably hypochlorite compatible. According to the present invention, the stable concentrated premix of the present invention comprises more than 6% by weight of the total premix of a surfactant as defined herein, or mixtures thereof, preferably from 6.1% to 15%, more preferably from 6.5% to 12% and most preferably from 6.5% to 10% by weight.
  • As a second essential element, the premix of the present invention comprises at least a water-insoluble material, or mixtures thereof. By "water-insoluble material" it is to be understood herein any component that is not miscible to water at ambient temperature, i.e. from 20°C to 25°C. In other words incorporating said given component in water at ambient temperature will result in a precipitation of said component in said medium.
  • Typically the premix of the present invention comprises from 0.1% to 4% by weight of the total premix of a water-insoluble material, or mixtures thereof, preferably from 0.5% to 3% by weight and more preferably from 1% to 2.5% by weight.
  • Suitable water-insoluble materials to be used herein include the following classes of compounds, soaps and/or fatty acids or perfumes, or colorants, or dyes or mixtures thereof.
  • Suitable fatty acids to be incorporated in the premix of the present invention include alkali metal salts of a C8-C18 fatty acid. Suitable fatty acids for use herein can be any C8-C18 fatty acid, preferably fully saturated, preferably a sodium, potassium or lithium salt, more preferably the sodium salt. Suitable fatty acids may be selected from caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid and mixtures of fatty acids suitably hardened, derived from natural sources such as tallow, coconut oil, ground oil and babassu oil. Said fatty acids may be used as an additional thickening aid and as suds suppressers. Typically, the premix according to the present invention comprises from 0.5% to 4%, preferably from 1% to 3% by weight of the total premix of fatty acids.
  • Suitable perfumes to be incorporated in the premix of the present invention include a perfume as is as well as a perfume blend. Preferred perfumes to be used herein are bleach stable perfumes, especially when said premix is used as raw material in the process of the present invention for manufacturing an aqueous detergent composition comprising bleaches. Typically, the premix herein comprises of from 0.2% to 2% by weight of the total premix of said perfume and preferably of from 0.5% to 1%.
  • A further essential feature of the present invention is the alkalinity of said premix. Indeed, alkalinity plays an important role in the premix stability. Accordingly the premix of the present invention has a pH as is greater than 10, preferably greater than 11, more preferably greater than 12. This is achieved by the addition of from 0.5% to 6% by weight of the total premix of a caustic alkali or mixtures thereof and preferably of from 1.5% to 3%. Suitable caustic alkalis for use herein include sodium and/or potassium hydroxide.
  • The stable concentrated premix of the present invention may further comprise other ingredients such as long chain amine oxides. This, for example, in an embodiment where the premix according to the present invention may be used as a raw material in order to provide aqueous detergent compositions having particular properties, such as viscous compositions. Preferred long chain amine oxides are according to the formula R1R2R3NO where R1 is primarily a C12-C18 alkyl group and R2 and R3 are C1 to C3 alkyl groups and even more preferred is to use a mixture of said long chain amine oxides. Indeed, such long chain amine oxides for use herein can be GenaminoxR LA, GemaminoxR MY-X (available from Hoechst), C12-C14 AromoxR DMMCO-W, (AKZO), Aromox DM14D-W, (AKZO) and Aromox DM14D-W (AKZO). Suitable long chain surfactants for use herein are preferably hypochlorite compatible. Particularly suitable to be used herein is a mixture of said long chain amine oxides, more specifically a mixture of a C14 chain amine oxide with a C12 chain amine oxide or a C16 chain amine oxide, with a ratio of said C14 chain amine oxide to said C12 chain amine oxide of from 0.3 to 10 and a ratio of said C14 chain amine oxide to said C16 chain amine oxide of from 0.2 to 4.5. The stable concentrated premix according to the present invention comprises from 0% to 12% by weight of the total premix of said long chain amine oxide, or mixtures thereof. If present said long chain amine oxide are preferably at a level of from 5% to 10% and more preferably of from 6% to 8% by weight of the total premix.
  • The stable concentrated premix of the present invention may further comprise other optional ingredients such as silicates, silicones, other long chain surface-active agents. This, for example in an embodiment where the premix according to the present invention may be used as a raw material in order to provide aqueous detergent compositions comprising such ingredients. Suitable long chain surface-active agents include organic surface-active agents selected from anionic, nonionic, cationic, and zwitterionic surface-active agents and mixtures thereof and preferred herein are alkyl sarcosinates, paraffin sulphonates, alkyl sulphates and alkyl ether sulphates. Highly preferred optional ingredients are C12 to C14 alkyl sulphates such as sodium dodecyl sulphate or sodium lauryl sulphate.
  • The stable concentrated premix of the present invention may also comprise a bleaching agent, as an optional highly preferred ingredient. Bleaching agent as mentioned herein includes hypochlorite bleaching agent and preferably an alkali metal hypochlorite. Although alkali metal hypochlorites are preferred, other hypochlorite compounds may also be used herein and can be selected from calcium and magnesium hypochlorite. Preferred alkali metal hypochlorite for use herein is sodium hypochlorite. The premix according to the present invention comprises said hypochlorite bleaching agent, such that the content of active chlorine in the composition is from 0% to 8% and preferably from 0% to 3.5%. According to the present invention the ingredients of the premix are selected so that said premix is hypochlorite compatible.
  • An advantage of the present invention is that said stable concentrated premix can be used as a raw material suitable to allow the formulation of fully formulated detergent compositions. Accordingly said premix constitutes up to 40% by weight of said detergent composition, preferably from 15% to 40% and more preferably from 25% to 35%.
  • Accordingly the present invention encompasses a process for manufacturing an aqueous detergent composition, said process comprising the step of preparing a stable concentrated premix as defined herein before. Said process further comprises a dilution step where said premix is diluted with water. The extent of dilution is at the discretion of the process operator and depends on the aqueous detergent composition desired. Indeed, the process of the present invention allows to manufacture a wide range of aqueous detergent compositions including highly concentrated compositions to non-concentrated compositions, depending on the dilution levels. The aqueous detergent composition is diluted in the process of the present invention until the aqueous detergent composition obtained herein has a concentration of surfactants having from 6 to 10 carbon atoms in their hydrophobic portion, of from 0.5% to 10% by weight of the total detergent composition, preferably of from 1% to 6% and more preferably of from 2% to 5%. Accordingly, the aqueous detergent composition obtained with the process of the present invention comprises from 0.1% to 2% by weight of the total detergent composition of water-insoluble material, or mixtures thereof, preferably from 0.5% to 2% and more preferably from 1% to 1.5%. The dilution stage is conducted at or around ambient temperature. The dilution water often has a temperature of from 15°C to 35° C.
  • The step of preparing the premix is conducted by simply adding in lukewarm to warm water (i.e. of from 35°C to approximately 45°C) all of the desired ingredients, i.e. surfactants as defined herein before with water-insoluble materials and the optional ingredients, e.g. silicates and/or long chain surfactants, if present, this in presence of caustic to raise the pH above 10 and while stirring. Preferred in the process of the present invention the surfactants having from 6 to 10 carbon atoms in their hydrophobic portion are added ahead of the low water solubility ingredients.
  • In an embodiment of the present invention where a bleaching agent is desired in the aqueous detergent compositions obtained according to the process of the present invention, said bleaching agent is preferably added as the last ingredient in said process, thereby ensuring longest possible market life for said compositions.
  • In another embodiment of the process of the present invention for manufacturing aqueous detergent compositions, the perfumes and/or colorants and/or dyes are preferably added during or after the dilution step, thereby ensuring great flexibility in adapting the aqueous detergent compositions to different market places. The aqueous detergent compositions obtained according to the process of the present invention may be used for a variety of cleaning purposes in any hard surfaces application including toilet bowl cleaning, in dishwashing applications, including hand dishwashing as well as washing with automatic dishwashing machines. Said compositions are suitable to be used as a pretreatment composition for treating dishes especially pans, pots kitchen grills and/or any kitchenware soiled by though food stains/encrustations.
  • Examples
  • The following premix according to the present invention were prepared.
    Premix (% weight) I II III IV V VI V
    C12/14 amine oxide / / / 8 6 8 /
    C14 amine oxide 6 5 4.5 / / / /
    C16 amine oxide 4 4.5 3 / 0.3 / /
    octyl sulphate 7 9 5 7 6.5 8 7.5
    C8/C10 amine oxide 3 / 2 / / / /
    fatty acid 1.1 1.4 0.9 1 1.5 1 2.2
    sodium hydroxide 0.6 2.6 4 3 2 3 3
    perfume / 0.8 0.8 0.7 0.5 0.7 0.7
    Silicate 1 1 1 / / / 1
    Water up to 100
  • According to the process of the present invention the above mentioned premix were prepared by simply mixing in warm water (about 45°C) the surfactants comprising a hydrophobic portion and a hydrophilic portion, wherein the length chain of said hydrophobic portion is C6-C10. The resulting mix was maintained at this temperature while pre-melted fatty acid was added with stirring. This was followed by addition of caustic soda and perfume under agitation. After a few minutes of stirring to ensure complete dissolution of the water-insoluble materials, the long chain surfactants (e.g. amine oxide) were added if desired. The resulting premix was allowed to stir for another 30 minutes.
  • All the above mentioned concentrated premix were stable.
  • The above mentioned premix were diluted with water to yield aqueous detergent compositions, i.e. the finished products. Indeed, the above premix were diluted with water at 1:3 ratio (three parts of water for each part of premix).

Claims (11)

  1. A process for manufacturing an aqueous detergent composition comprising from 0.5% to 10% by weight of the total composition of a surfactant being a C6-C10 alkyl sulphate or C6-C10 alkyl sulphonate or mixtures thereof and from 0.1% to 2% by weight of the total composition of a water-insoluble material or mixtures thereof, said process comprising the steps of:
    preparing under alkaline conditions a stable concentrated premix having a pH greater than 10 and comprising from 0.1% to 4% by weight of the total premix of a water-insoluble material, or mixtures thereof, more than 6% by weight of the total premix of a surfactant being a C6-C10 alkyl sulphate or C6-C10 alkyl sulphonate or mixtures thereof, and from 55% to 86% by weight of the total premix of water wherein said premix is preparated by adding in warm water of a temperature of from 35°C to 45°C, said surfactant, said water-insoluble material, and optinally optional ingredients while strirring;
    diluting said premix with water to obtain said detergent composition.
  2. A process according to claim 1 wherein said surfactant is a C6-C8 alkyl sulphate and/ or sulphonates, preferably octyl sulphate.
  3. A process according to any of the preceding claims wherein said water-insoluble material includes perfumes, colorants, dyes, fatty add and/or soaps.
  4. A process according to any of the preceding claims, wherein said premix comprises from 6.1% to 15% by weight of the total premix of said surfactant, or mixtures thereof, preferably from 6.5% to 12% by weight and more preferably from 6.5% to 10% by weight.
  5. A process according to any of the preceding claims, wherein said premix comprises from 0.5% to 3% by weight of the total premix of said water insoluble material, or mixtures thereof and preferably from 1% to 2.5% by weight.
  6. A process according to any of the preceding claims, wherein said premix has a pH as is greater than 11 and preferably greater than 12.
  7. A process according to any of the preceding claims, wherein said premix further comprises optional ingredients including silicates, silicones, long chain amine oxides or other long chain surface-active agents or mixtures thereof, said long chain surface-active agents including anionic, nonionic, cationic, zwitterionic surface-active agents, or mixtures thereof.
  8. A process according to claim 7, wherein said anionic surfactants are alkyl sarcosinates, paraffin sulphonates, alkyl sulphates, alkyl ether sulphates, or mixtures thereof preferably C12 to C14 alkyl sulphates and more preferably sodium dodecyl sulphate and sodium lauryl sulphate.
  9. A process according to claims 7 or 8 wherein said long chain amine oxides are according to the formula R1R2R3NO wherein R2 and R3 are independently C1-C3 alkyl groups and R1 is C12-C18 alkyl group.
  10. A process according to any of the present claims wherein said premix further comprises a bleaching agent preferably an alkali metal hypochlorite.
  11. A process according to any of the claims 1 to 9 wherein said process comprises as the last step the addition of a bleaching agent, preferably of an alkali metal hypochlorite.
EP94202726A 1994-07-18 1994-09-22 A stable concentrated premix and its use for manufacturing aqueous detergent compositions Expired - Lifetime EP0693548B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PT94202726T PT693548E (en) 1994-09-22 1994-09-22 PRE-STABLE CONCENTRATE MIXTURE AND ITS USE IN THE MANUFACTURE OF AQUEOUS DETERGENT COMPOSITIONS
CA002153354A CA2153354C (en) 1994-07-18 1995-07-06 Stable concentrated premix and its use for manufacturing aqueous detergent compositions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
WOPCT/US94/08089 1994-07-18
PCT/US1994/008089 WO1995003383A1 (en) 1993-07-23 1994-07-18 Thickened aqueous detergent compositions with improved cleaning performance with short chain surfactants

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EP0693548A1 EP0693548A1 (en) 1996-01-24
EP0693548B1 true EP0693548B1 (en) 2001-11-28

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DE102005062012A1 (en) * 2005-12-22 2007-06-28 Henkel Kgaa Aqueous hand-dishwashing liquid comprises a surfactant combination of anionic- and non-ionic surfactants and alkaline hypochlorite
CN105073967A (en) * 2013-03-26 2015-11-18 宝洁公司 Cleaning compositions for cleaning a hard surface
WO2014160591A1 (en) * 2013-03-26 2014-10-02 The Procter & Gamble Company Articles for cleaning a hard surface
JP6284779B2 (en) * 2014-02-14 2018-02-28 花王株式会社 Liquid detergent composition
CN104629688A (en) * 2015-03-05 2015-05-20 李震 Closestool splash-proof foam aerosol and preparation method thereof
EP3257924A1 (en) * 2016-06-17 2017-12-20 The Procter and Gamble Company Liquid detergent composition

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NL134221C (en) * 1969-08-29 Unilever Nv
FR2268069B1 (en) * 1974-04-19 1977-10-14 Procter & Gamble Europ
FR2345513A1 (en) * 1976-03-24 1977-10-21 Rhone Poulenc Ind TENSIO-ACTIVE COMPOSITION BASED ON NON-IONIC SURFACTANTS
US4404040A (en) * 1981-07-01 1983-09-13 Economics Laboratory, Inc. Short chain fatty acid sanitizing composition and methods
GB8609806D0 (en) * 1986-04-22 1986-05-29 Unilever Plc Cleaning composition
DE4025065A1 (en) * 1990-08-08 1992-02-13 Henkel Kgaa LIQUID, POURABLE AND PUMPABLE SURFACTANT CONCENTRATE
US5196146A (en) * 1991-10-28 1993-03-23 The Dow Chemical Company Aqueous cleaning formulation containing a 2-piperazinone, method of using the same and concentrate for preparing the same
AU3592993A (en) * 1992-02-04 1993-09-01 Henkel Corporation Surfactant blends for detergent compositions
DE69325589T2 (en) * 1992-11-03 2000-01-27 The Procter & Gamble Co., Cincinnati CLEAN WITH SHORT-CHAIN SURFACES
DE4237178A1 (en) * 1992-11-04 1994-05-05 Henkel Kgaa Aqueous surfactant concentrate

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ES2168286T3 (en) 2002-06-16
EP0693548A1 (en) 1996-01-24
DK0693548T3 (en) 2002-02-11
DE69429256D1 (en) 2002-01-10
ATE209674T1 (en) 2001-12-15

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