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WO1993004159A1 - Stabilizing percarbonate in detergents - Google Patents

Stabilizing percarbonate in detergents Download PDF

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Publication number
WO1993004159A1
WO1993004159A1 PCT/SE1991/000895 SE9100895W WO9304159A1 WO 1993004159 A1 WO1993004159 A1 WO 1993004159A1 SE 9100895 W SE9100895 W SE 9100895W WO 9304159 A1 WO9304159 A1 WO 9304159A1
Authority
WO
WIPO (PCT)
Prior art keywords
stage
substances
percarbonate
surfactants
mixing
Prior art date
Application number
PCT/SE1991/000895
Other languages
English (en)
French (fr)
Inventor
Ingemar Lejon
Original Assignee
Kommentus Ecogreen Aktiebolag
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 Kommentus Ecogreen Aktiebolag filed Critical Kommentus Ecogreen Aktiebolag
Publication of WO1993004159A1 publication Critical patent/WO1993004159A1/en

Links

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
    • 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
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/88—Ampholytes; Electroneutral compounds
    • C11D1/94—Mixtures with anionic, cationic or non-ionic compounds
    • 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
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3902—Organic or inorganic per-compounds combined with specific additives
    • C11D3/3937—Stabilising agents
    • C11D3/394—Organic compounds

Definitions

  • the present invention relates to a method of stabilizing percarbonate in powder detergents.
  • the object of the invention is to provide a method by means of which the stability of percarbonate in detergents can be increased to a substantially greater extent than has hitherto been possible.
  • Sodium perborate is used as a bleaching agent in many laundry washing detergents at present available commercially. This compound, however, has a number of undesirable properties when used as a bleaching agent in detergents.
  • Sodium perborate is a relatively stable chemical compound which results in a low bleaching effects when washing at temperatures of 30-40oC. From an environmental aspect, however, it is preferred to wash at lower temperatures, because of the resultant lower energy consumption.
  • Perborates also include boron, which has a harmful influence on marine plants, among others, and is therefore less suitable for use, due to its negative influence on the environment.
  • Such compounds are percarbonates, particularly sodium percarbonate which, as a result of its less stable structure, provides a bleaching effect at lower temperatures than sodium perborate.
  • Alkali percarbonates and in particular sodium percarbonate, contain no components which are detrimental to the environment when used normally, and are therefore preferred as bleaching agents to sodium perborate.
  • percarbonate due to its less stable structure, percarbonate causes product durability problems when used as a detergent bleaching agent. Degradation of percarbonate is namely accelerated in the presence of other substances, such as heavy metals, readily oxidizable substances and moisture. As a result, percarbonate degrades relatively quickly when in mixture with a detergent, which results in a poorer washing effect and therewith a highly limited stability in storage.
  • percarbonate can be stabilized in detergents to a far greater extent than was hitherto possible by a) selection of ingoing surfactants in a given manner, b) selection of a given technique in detergent manufacture, c) the use of certain auxiliaries as further additives, and d) mixing of the detergent components in a given order.
  • the inventive method is characterized by
  • amphoteric surfactants selected from tallow ampho-polycarboxy glycinate, mixed C8-amphocarboxylates, caprylo-amphocarboxy propionate, cocoamphocarboxy propionate and cocoamphocarboxy glycinate, and
  • inventive method is based on the known so-called agglomeration technique for the manufacture of powder detergents.
  • This agglomeration technique involves mixing solid, powder particles with liquid substances in droplet form. Agglomeration enables powdered detergents to be produced in high litre-weights and at high activesubstance concentration. These so-called compact detergents have many advantages over detergents that are manufactured in spray towers. The compact detergents greatly reduce the need for space in transportation and in storage facilities, shops and in the home. The amount of material required for packaging purposes is also greatly reduced, as is also the energy required for manufacture.
  • the inventive method entails mixing the detergent components stepwise, with the exception of the percarbonate, so as to encapsulate those substances which have an unstabilizing effect on percarbonate, so that the substances obtain an outer surface which will counteract degradation.
  • the requisite amount of percarbonate is added to the detergent.
  • the percarbonate used is preferably one which has itself been subjected to a stabilizing process with the aid of an earlier known technique.
  • a combination of certain liquid surfactants namely amphoteric surfactants chosen from the group tallow ampho-polycarboxy glycinate, mixed C8- amphocarboxylates, cocoamphocarboxy propionate, etc. on the one hand, and one or more nonionic surfactants and optionally one or more anionic surfactants on the other hand.
  • a sequestering agent which is capable of binding heavy metal ions, particularly
  • Fe 2+ and Fe 3+ -ions such ions often being present as contaminants in those substances used in powder detergents.
  • stage I one or more protective colloids, preferably carboxymethyl cellulose.
  • stage II When practicing the inventive method, it is also possible to also mix in stage I) or III) granule encapsulated enzymes, an antioxidation agent having been dissolved in at least one of the surfactants in stage II).
  • the enzymes are preferably of the kind used conventionally in the manufacture of powdered detergents.
  • the antioxidation agent used in stage II may be a (C 1 -C 4 )-alkyl ester of 3,4,5-trihy- droxybenzoic acid, preferably ethyl 3,4,5-trihydroxybenzoate, and/or butylhydroxyanisole.
  • the amount of antioxidant used is normally from 0.005 to 0.03 percent by weight, preferably 0.005-0.01 percent by weight (all percentages given here and in the following relate to the total weight of the detergent).
  • soda, disilicates, silicates and sodium sulphate are preferably used as component carrier, alkali donor, corrosion inhibitor and anticaking agent.
  • the amount of soda concentration used is generally within the range of 20- 40, preferably 25-35 percent by weight, whereas the concentration of disilicate + silicate used lies within the range of 5-25, preferably 10-15 percent by weight, and the concentration of sodium sulphate used lies within the range of 0-15, preferably 5-12 percent by weight.
  • the total concentration of these components is generally from 50-65 percent by weight.
  • the sequestering agent used in stage I) may consist of one or more substances taken from the group carboxylates, phosphates and polyacrylates.
  • the sequestering agent used in stage I) may consist of one or more substances taken from the group carboxylates, phosphates and polyacrylates.
  • sodium citrate and/or a mixture of sodium tartrate and potassium tartrate are used, it being possible to add these substances as such to the system or to form said substances in situ from citric acid or tartaric acid added to the system in stage I).
  • the sequestering agent used consists of one or more carboxylates
  • the sequestering agent will normally be present in a concentration within the range of
  • the surfactant is preferably a nonionic surfactant, particularly a fatty alcohol ethoxylate having 16-18 c-atoms in the alcohol moity and a degree of ethoxylation of 20-25 moles ethylene oxide units.
  • the surfactant concentration is normally within the range of 0-7.5, preferably 2.5-5 percent by weight. It is also possible, however, to use other solid surfactants in this stage.
  • the total concentration of solid components used in stage I) normally lies within the range of 70-85 percent by weight.
  • amphoteric surfactants are chosen from the group tallow amphopolycarboxy glycinate, mixed C8-amphocarboxylates, caprylo-amphocarboxy propionate, cocoamphocarboxy propionate and cocoamphocarboxy glycinate.
  • Examples of tallow ampho-polycarboxy glycinate used in this context are such products as those retailed under the trade names Ampholak ® 7TX and Beraid ® 7557 from Berol Nobel, Sweden.
  • Examples of mixed C8- amphocarboxylates which can be used with the inventive method is the product retailed under the trade name Miranol ® JEM CONC from Miranol Chemical Company, Inc., South Brunswick (Dayton), NJ, U.S.A.
  • an example of the caprylo-amphocarboxy propionate is the product retailed under the trade name Miranol ® J2M-SF CONC from Miranol Chemical Company, Inc., South Brunswick
  • cocoamphocarboxy glycinates which can be used is the product retailed under the trade name Miranol ® C2M CONC from Miranol Chemical Company, Inc., South Brunswick
  • cocoamphocarboxy propionate used is the product retailed under the trade name Miranol ® C2M-SF CONC from Miranol Chemical Company, Inc., South Brunswick (Dayton), NJ, U.S.A.
  • the amphoteric surfactant or amphoteric surfactants is/are normally present in a concentration of 1-15, preferably 3-8 percent by weight.
  • the nonionic surfactant used in stage II) when practicing the inventive method suitably consists of one or more substances taken from the group fatty alcohol
  • Fatty alcohol ethoxylates and oxoalcohol ethoxylates are
  • such oxylates having a carbon chain of 8-18, preferably 10-14, carbon atoms in the alcohol part and a degree of ethoxylation of
  • the nonionic surfactant concentration is normally
  • anionic surfactants can be used in the detergent, for example paraffin sulphonate and/or lauryl sulphate and/or lauryl ether sulphate.
  • the anionic surfactant or surfactants is or are suitably present in a concentration of 0-15, preferably 0-5 percent by weight and may be excluded to no detriment.
  • the surfactants are sprayed onto the mixture of solid components, advantageously in the order in which the anionic surfactants, when used, are sprayed first
  • amphoteric surfac tants either alone or in mixture with the amphoteric surfac tants, and the amphoteric surfactants are preferably sprayed before spraying the nonionic surfactants.
  • the sequestering agent capable of binding heavy metal ions and the antioxidation agents are preferably dissolved in that surfactant of the surfactants used which dissolves most of the substance concerned.
  • the sequestering agent used in this connection may, for example, be a sequestering agent on the basis of the tetrasodium salt of ethylenediaminetetraacetic acid
  • Na 4 EDTA having a specific ability to bind Fe 2+ and Fe 3+ -ions, or one or more substances taken from the group citrates, tartrates, gluconates and corresponding acids, preferably sodium citrate and/or a mixture of sodium tartrate and potassium tartrate or the corresponding acid or acids.
  • the sequestering agent is normally present in a concentration within the range of
  • the sequestering agent is suitably present in a concentration of 0.2-1.0, preferably 0.2-0.6 percent by weight.
  • perfumes may also be mixed with the detergent in conventional amounts.
  • the mixing procedure is effected with the addition of dyes and/or perfume in solid form in stage I), while liquid substances of this kind are added in stage II).
  • these substances are added solely in a solid form or solely in a liquid form, although it is possible, of course. to use both solid and with substances of this kind, in which case it is necessary to divide the substances in stages I) and II) in accordance with the aforesaid principle.
  • the percarbonate mixed in stage III) is normally added to a concentration of 5-20, preferably 5-10 percent by weight.
  • the percarbonate used is advantageously a percarbonate that has already been stabilized in conjunction with its manufacture.
  • a moisture-absorbing material may also be added in stage III), preferably a disilicate and/or soda.
  • the amount of moisture- absorbing material supplied to this stage is normally from 0-15 percent by weight.
  • the disilicate is normally supplied to a concentration to 3-8 percent by weight.
  • Enzymes encapsulated in granules can also be added in stage III) instead of in stage I).
  • a number of detergent powders were produced in an agglomerator known as a Forberg mixer obtained from Halvor Forberg A/S, Larvik, Norway.
  • stage I in the table below
  • Liquid surfactants optionally having substances dissolved therein, were then sprayed in a second stage (stage II in the table) in a fine droplet form on the fluidized mixture of solid particles, wherein the anionic surfactant, when present, was sprayed first, the amphoteric surfactant was sprayed second and the nonionic surfactant was sprayed last in order to coat the solid particles mixed in stage I).
  • sodium percarbonate and, when used, a moisture-absorbing agent were admixed with the aforesaid mixture in a third stage (stage III in the table).
  • A is the weight of the sample (g) and A is the titration (ml) :

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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)
  • Inorganic Chemistry (AREA)
  • Detergent Compositions (AREA)
PCT/SE1991/000895 1991-08-16 1991-12-20 Stabilizing percarbonate in detergents WO1993004159A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9102380A SE468014B (sv) 1991-08-16 1991-08-16 Foerfarande foer stabilisering av perkarbonat i pulverformiga tvaettmedel
SE9102380-4 1991-08-16

Publications (1)

Publication Number Publication Date
WO1993004159A1 true WO1993004159A1 (en) 1993-03-04

Family

ID=20383489

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000895 WO1993004159A1 (en) 1991-08-16 1991-12-20 Stabilizing percarbonate in detergents

Country Status (3)

Country Link
AU (1) AU9175491A (sv)
SE (1) SE468014B (sv)
WO (1) WO1993004159A1 (sv)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6187055B1 (en) 1996-01-03 2001-02-13 Henkel Kommanditgesellschaft Auf Aktien Washing agents with specific oxidized oligosaccharides
DE102004020082A1 (de) * 2004-04-24 2005-05-19 Henkel Kgaa Verfahren zur Herstellung von Wasch- und/oder Reinigungsmitteln
EP0736085B2 (en) † 1993-12-21 2009-12-16 The Procter & Gamble Company Detergent compositions containing percarbonate, amylase and protease
EP3339410A1 (en) * 2016-12-22 2018-06-27 The Procter & Gamble Company Automatic dishwashing composition

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1361708A (en) * 1971-11-09 1974-07-30 Fmc Corp Process for agglomerating sodium carbonate peroxide
DE2420762A1 (de) * 1973-04-30 1974-11-07 Du Pont Verfahren zur verbesserung der stabilitaet von natriumpercarbonat in bleich- und waschmitteln
EP0024201A1 (en) * 1979-08-15 1981-02-25 The Clorox Company Stabilized alkali metal percarbonate bleach compositions and process for manufacture thereof
DE3337719A1 (de) * 1982-10-21 1984-04-26 Colgate-Palmolive Co., 10022 New York, N.Y. Stabilisierte teilchenfoermige bleich- und waschmittelzusammensetzung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1361708A (en) * 1971-11-09 1974-07-30 Fmc Corp Process for agglomerating sodium carbonate peroxide
DE2420762A1 (de) * 1973-04-30 1974-11-07 Du Pont Verfahren zur verbesserung der stabilitaet von natriumpercarbonat in bleich- und waschmitteln
EP0024201A1 (en) * 1979-08-15 1981-02-25 The Clorox Company Stabilized alkali metal percarbonate bleach compositions and process for manufacture thereof
DE3337719A1 (de) * 1982-10-21 1984-04-26 Colgate-Palmolive Co., 10022 New York, N.Y. Stabilisierte teilchenfoermige bleich- und waschmittelzusammensetzung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0736085B2 (en) † 1993-12-21 2009-12-16 The Procter & Gamble Company Detergent compositions containing percarbonate, amylase and protease
US6187055B1 (en) 1996-01-03 2001-02-13 Henkel Kommanditgesellschaft Auf Aktien Washing agents with specific oxidized oligosaccharides
DE102004020082A1 (de) * 2004-04-24 2005-05-19 Henkel Kgaa Verfahren zur Herstellung von Wasch- und/oder Reinigungsmitteln
EP3339410A1 (en) * 2016-12-22 2018-06-27 The Procter & Gamble Company Automatic dishwashing composition
WO2018118745A1 (en) * 2016-12-22 2018-06-28 The Procter & Gamble Company Automatic dishwashing composition

Also Published As

Publication number Publication date
SE9102380D0 (sv) 1991-08-16
SE9102380L (sv) 1992-10-19
AU9175491A (en) 1993-03-16
SE468014B (sv) 1992-10-19

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