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EP0071481B1 - Agents de réglage de la mousse et compositions détergentes les contenant - Google Patents

Agents de réglage de la mousse et compositions détergentes les contenant Download PDF

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Publication number
EP0071481B1
EP0071481B1 EP82304013A EP82304013A EP0071481B1 EP 0071481 B1 EP0071481 B1 EP 0071481B1 EP 82304013 A EP82304013 A EP 82304013A EP 82304013 A EP82304013 A EP 82304013A EP 0071481 B1 EP0071481 B1 EP 0071481B1
Authority
EP
European Patent Office
Prior art keywords
suds
gelatinised starch
detergent composition
control agent
silicone oil
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
Application number
EP82304013A
Other languages
German (de)
English (en)
Other versions
EP0071481A1 (fr
Inventor
Louis Ho Tan Tai
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.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
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
Application filed by Unilever PLC, Unilever NV filed Critical Unilever PLC
Priority to AT82304013T priority Critical patent/ATE20358T1/de
Publication of EP0071481A1 publication Critical patent/EP0071481A1/fr
Application granted granted Critical
Publication of EP0071481B1 publication Critical patent/EP0071481B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0026—Low foaming or foam regulating compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/18—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/22—Carbohydrates or derivatives thereof
    • C11D3/222—Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/373—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicones

Definitions

  • This invention relates to detergent compositions containing suds control agents and to a process for their manufacture.
  • Detergent compositions particularly fabric washing detergent powders, which produce only a relatively small amount of suds in washing machines are gaining an increasing share of the European market as automatic (drum-type) washing machines become more widespread.
  • existing products generally use a mixture of soaps for controlling suds produced by anionic surfactants, or by mixtures of anionic and nonionic surfactants, it is now generally accepted in the industry that such products are not ideal, since the soap tends to have adverse effects, for example, on powder properties. Consequently, there are now a large number of proposals in the literature for alternative suds-control agents which do not contain soap.
  • One example of such a proposal is that in British Patent No. 1,492,939 which discloses, amongst other things a silicone-based suds control agent.
  • This suds-control agent involves the use of an adsorbent carrier, and as examples of such carriers, sodium carbonate, sodium tripolyphosphate, sodium silicate, clay, starch, Kieselguhr and Fuller's Earth are listed.
  • gelatinised starch is a useful material for forming the basis of a silicone-based suds control agent in that it has an optimum combination of sorbency and solubility characteristics.
  • the present invention provides a detergent composition
  • a detergent composition comprising an anionic surfactant and a silicone-based suds-control agent, characterised in that the suds-control agent comprises a core of gelatinised starch having a mixture of a silicone oil and hydrophobic silica adsorbed thereon.
  • the suds-control agent is coated with a layer of wax, preferably paraffin wax, since we have discovered that the storage characteristics of such coated agents are superior to those of uncoated ones.
  • the invention provides a process for making a detergent composition characterised by the steps of
  • gelatinised starch for the adsorbent core of the suds-control agent.
  • Gelatinised starch is essentially a partially hydrolysed starch which can be obtained by suspending granules of starch, such as maize starch, in water and drying the suspension in steam heated drums.
  • gelatinised starches sold under the Registered Trade Mark "Amigel” by Socidt6 des Produits du Mais of Clamart, France, but we believe that other gelatinised starches will be just as effective.
  • the suds-control effect of a mixture of silicone oil and hydrophobic silica is quite easily deactivated and two factors in the characteristics of the gelatinised starch which have been found to be important though not essential to its effectiveness are its ionic character and its pH.
  • the gelatinised starch should be nonionic in character and also that the pH should be in the range 5.5 to 9.
  • the gelatinised starch Further important characteristics of the gelatinised starch are its particle size and its particle size distribution. Small particle size, that is to say a weight average particle size of from 50 to 500 pm is important from the viewpoint of maximising the surface area of the gelatinised starch, so that it can adsorb as much of a mixture of a silicone oil and hydrophobic silica as possible.
  • the particle size distribution is preferred to be narrow so that if it is decided to granulate the gelatinised starch, then the resultant granules are relatively uniform in size and shape. The subsequent coating with a layer of wax is then more likely to be of uniform thickness and to be coherent than if particles of a widely different particle size are used to form the granule.
  • silicone oils used in the mixture of silicone oil and hydrophobic silica of the invention are generally from the chemical class of alkyl polysiloxanes. These materials are well known to industrial chemists and are available in a wide range of molecular weights, the higher molecular weight materials, as is usually the case with polymers, tending to be more viscous. Silicone oils are available from various suppliers, and Dow Corning Corporation of Illinois, USA, and Rhone-Poulenc Chemie, supply mixtures of silicone oils and silicas of various types, including hydrophobic silicas, which we have found very satisfactory for use as mixtures of silicone oil and hydrophobic silica in this invention.
  • the process of this invention involves a granulation or agglomeration step.
  • Granulation and agglomeration are well-known techniques in which liquid is added to particles of a solid, with agitation, and in which large particles are formed.
  • the "Eirich" pan (Registered Trade Mark) is an apparatus which is well-known in the food and detergents industry which was developed especially for granulation processes.
  • fluidised bed apparatus such as the "Anhydro" fluidised bed (Registered Trade Mark) for granulation or, more preferably a Schugi (Registered Trade Mark) mixer.
  • This type of mixer consists essentially of a closed cylinder provided with a set of mixer blades rotatable about its major axis. The blades are of variable pitch and are arranged so that they can impart a spiral mixing motion to particles in the mixer.
  • the side-walls of the cylinder are provided with spray nozzles for the introduction of liquid.
  • the process also involves a coating step and this can be a spraying step in which a solution of a wax in an organic solvent is sprayed onto the granules produced in the previous step. The solvent is then evaporated to leave a coherent coating of the wax on the granules.
  • a molten wax can be used in the coating step.
  • the type of wax used is not critical since, as it is present in only a relative thin layer, it will dissolve off the granules or agglomerates in the warm, detergent-rich environment of the wash liquor.
  • the softening point of the wax should be below the temperature at which washing generally takes place, that is to say below about 80°C.
  • wash temperatures it is becoming increasingly common for wash temperatures to be specified at as low as 60°C or even 40°C. We prefer to use paraffin wax of these softening points, but there is no reason why other waxes, should not be used.
  • the relative proportions of the essential components in the preferred suds-control agents of the invention can vary quite widely, although since the gelatinised starch is intended to be present as an adsorbent it will normally be present in an amount greater than the silicone oil which it is intended to adsorb. Preferred relative proportions are: the percentages being based on the total weight of the suds-control agent.
  • the suds-control agent will normally be present in detergent compositions in accordance with the invention in amounts of from 0.1 to 2%, preferably 0.1 to 1%.
  • this invention is concerned with a suds-control agent and consequently no attempt has been made in this specification to describe all possible detergent compositions to which the component could be added. It is self-evident that the usual detergent composition components are appropriate provided that they have no adverse reaction with the components of the suds-control agent.
  • anionic surfactants such as alkylbenzene sulphonates, primary and secondary alkyl sulphates, secondary alkane sulphonates, soaps and olefine sulphonates can be used.
  • Nonionic surfactants either alone or in combination with anionic surfactants can also be used, the preferred nonionic surfactants being C, to C 24 primary or secondary alcohols ethoxylated with from 1 to 25 moles of ethylene oxide per mole of alcohol. Typical amounts of surfactant are from 3 to 25% by weight when only one species is present, and from 1 to 16% by weight when more than one is present.
  • Builders may be present in amounts of from 5 to 50% by weight.
  • Typical of the inorganic builders are sodium tripolyphosphate, sodium pyrophosphate and sodium orthophosphate, sodium carbonate and the crystalline and amorphous forms of aluminosilicates.
  • Organic builders such as sodium nitrilotriacetate, sodium citrate, sodium carboxymethyloxysuccinate, and the host of other materials have been suggested as phosphate replacers are also appropriate.
  • sodium silicate as a corrosion inhibitor and powder structurant
  • oxygen bleaches such as sodium perborate and sodium percarbonate
  • bleach precursors such as tetraacetylethylene diamine, fluorescers, antiredeposition agents and antiashing agents
  • suds- suppressing agents other than the silicone granules of the invention and moisture.
  • a fabric washing powder having the following formulation was prepared by conventional spray-drying and dry-dosing techniques:
  • the suds assessment test is performed by washing a standard load of clean washing in a Brandt 433 (registered trade mark) washing machine.
  • the washing machine was specially modified to provide a window and the window had an arbitrary scale on it from which suds height could be read.
  • the reservoir holding the wash liquor is fitted with a thermometer.
  • Example 2 A similar experiment to that in Example 1 was performed, but in this example the suds-control granules were prepared from 46 parts of the gelatinised starch and 46 parts of the mixture of a silicone oil and hydrophobic silica.
  • the granules were combined with the remaining components of the fabric washing powder, and the suds control performance of the powder was assessed as described above except that the powder formulation contained 1% of sodium hardened rape seed oil soap and a correspondingly reduced amount of water.
  • the results of the suds control assessment are shown in Table 2.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Emergency Medicine (AREA)
  • Detergent Compositions (AREA)

Claims (8)

1. Composition détergente comprenant un tensioactif anionique et un agent de réglage de mousse à base de silicone, caractérisé en ce que l'agent de réglage de mousse comprend un coeur en amidon gélatinisé qui porte adsorbé sur lui un mélange d'huile de silicone et de silice hydrophobe.
2. Composition détergente selon la revendication 1, de plus caractérisée en ce que le coeur d'amidon gélatinisé ayant adsorbé sur lui une huile de silicone est revêtu d'une cire. --3. Composition détergente selon la revendication 2, de plus caractérisée en ce que la composition de l'agent de réglage de mousse est
Figure imgb0007
les pourcentages étant basés sur le poids total de l'agent.
4. Composition détergente selon l'une quelconque des revendications précédentes, de plus caractérisée en ce que la taille de particule de coeur d'amidon gélatinisé est comprise entre 50 et 500 pm.
5. Composition détergente selon l'une quelconque des revendications précédentes, de plus caractérisée en ce que l'agent de réglage de mousse est présent en quantité comprise entre 0,1 et 1% en poids de la composition.
6. Composition détergente selon l'une quelconque des revendications précédentes, de plus caractérisée en ce que l'amidon gélatinisé est un amidon gélatinisé non ionique.
7. Composition détergente selon l'une quelconque des revendications précédentes, de plus caractérisée en ce que le pH de l'amidon gélatinisé est compris entre 5,5 et 9.
8. Procédé de fabrication d'une composition détergente caractérisée par les étapes de:
a) granulation d'un amidon gélatinisé avec un mélange d'une huile de silicone et de silice hydrophobe pour former des granulés ayant une taille de particule moyenne comprise entre 200 et 1000 µm et ayant le mélange d'huile de silicone et de silice hydrophobe adsorbés à leur surface.
b) revêtement des granulés avec une cire de préférence en pulvérisant sur eux une solution de cire dans un solvant organique et, dans ce cas, en évaporant ensuite le solvant organique, et
c) mélange de l'agent de réglage de mousse résultant avec le reste de la composition.
EP82304013A 1981-07-31 1982-07-29 Agents de réglage de la mousse et compositions détergentes les contenant Expired EP0071481B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82304013T ATE20358T1 (de) 1981-07-31 1982-07-29 Schaumregulierungsmittel und diese enthaltende detergenszusammensetzungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8123492 1981-07-31
GB8123492 1981-07-31

Publications (2)

Publication Number Publication Date
EP0071481A1 EP0071481A1 (fr) 1983-02-09
EP0071481B1 true EP0071481B1 (fr) 1986-06-11

Family

ID=10523604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82304013A Expired EP0071481B1 (fr) 1981-07-31 1982-07-29 Agents de réglage de la mousse et compositions détergentes les contenant

Country Status (4)

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EP (1) EP0071481B1 (fr)
AT (1) ATE20358T1 (fr)
DE (1) DE3271649D1 (fr)
ES (1) ES8308354A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA833292B (en) * 1982-05-11 1984-12-24 Unilever Plc Granules containing silicone-based anti-foam and a process for preparing them
ZA838239B (en) * 1982-11-10 1985-06-26 Unilever Plc Hydrocarbon anti-foam granules
GB8513074D0 (en) * 1985-05-23 1985-06-26 Unilever Plc Antifoam ingredient
US4652392A (en) * 1985-07-30 1987-03-24 The Procter & Gamble Company Controlled sudsing detergent compositions
GB8521956D0 (en) * 1985-09-04 1985-10-09 Unilever Plc Antifoam ingredient
GB9410677D0 (en) 1994-05-27 1994-07-13 Unilever Plc Detergent compositions
ES2231122T3 (es) 1999-08-13 2005-05-16 Dow Corning S.A. Agente de control de espuma basado en silicona.
ES2306649T3 (es) 1999-08-13 2008-11-16 Dow Corning Europe Sa Agente de control de espuma de silicona.
DE10108459A1 (de) * 2001-02-22 2002-09-12 Henkel Kgaa Schaumregulatorgranulat
ES2412265T3 (es) * 2008-09-12 2013-07-10 Unilever N.V. Mejoras que se refieren a acondicionadores de material textil
JP2023514924A (ja) * 2019-12-16 2023-04-12 ザ・グッドイヤー・タイヤ・アンド・ラバー・カンパニー シリカ被覆デンプン

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462184A1 (fr) * 1979-07-31 1981-02-13 Eurand France Nouvelles compositions antimousses sous forme de granules utilisables notamment dans les lessives en poudre
FR2481942B1 (fr) * 1980-05-12 1988-04-22 Unilever Nv Granules antimousse, leur procede de fabrication et leur utilisation dans les compositions detergentes

Also Published As

Publication number Publication date
EP0071481A1 (fr) 1983-02-09
ES514599A0 (es) 1983-08-16
DE3271649D1 (en) 1986-07-17
ES8308354A1 (es) 1983-08-16
ATE20358T1 (de) 1986-06-15

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