WO1999043781A1 - Stabilisant de blanchiment comprenant des sels d'acides gras - Google Patents

Stabilisant de blanchiment comprenant des sels d'acides gras Download PDF

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Publication number
WO1999043781A1
WO1999043781A1 PCT/GB1999/000352 GB9900352W WO9943781A1 WO 1999043781 A1 WO1999043781 A1 WO 1999043781A1 GB 9900352 W GB9900352 W GB 9900352W WO 9943781 A1 WO9943781 A1 WO 9943781A1
Authority
WO
WIPO (PCT)
Prior art keywords
bleach
stabiliser
bleach stabiliser
earth metal
alkaline earth
Prior art date
Application number
PCT/GB1999/000352
Other languages
English (en)
Inventor
Thomas Andrew Mcilroy
Original Assignee
Thomas Andrew Mcilroy
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 Thomas Andrew Mcilroy filed Critical Thomas Andrew Mcilroy
Priority to AU24340/99A priority Critical patent/AU2434099A/en
Publication of WO1999043781A1 publication Critical patent/WO1999043781A1/fr

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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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/046—Salts
    • 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
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/33—Amino carboxylic acids
    • 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
    • C11D3/36—Organic compounds containing phosphorus
    • C11D3/361—Phosphonates, phosphinates or phosphonites
    • 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
    • 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
    • C11D1/02—Anionic compounds
    • C11D1/04—Carboxylic acids or salts thereof

Definitions

  • the present invention relates to a bleach stabiliser, particularly for use in alkaline peroxide based bleaches.
  • the most common method of bleaching particularly to bleach cellulose, uses hydrogen peroxide in alkaline conditions.
  • the bleach must be stabilised to control the rate of bleaching and to avoid uncontrolled decomposition of the peroxide.
  • bleach stabilisers for example proteins, sequesterants and sodium silicates, and usually it is also necessary to have magnesium ions present in the stabiliser.
  • the most effective stabiliser to date has been sodium silicate due to its cost effectiveness. This has been used extensively in continuous bleaching processes, when only a low level of stabilisation is required before the fabric is transported to a heating area, where the bleach is activated and bleaching occurs in seconds.
  • most equipment that is used in batch bleach processing contains a pump to circulate liquor either through the material to be bleached or to assist in transportation of the material.
  • the pumps create areas of shear and pressure differences, which are dependant upon their construction and operation, but which also assist in the decomposition of the peroxide bleach.
  • Sodium silicate has been used in batch bleach processing as the most effective bleach stabiliser. However, there is still significant bleach decomposition and unlike other bleach stabilisers the activity of sodium silicate cannot be increased by the addition of magnesium ions, as this creates insoluble magnesium silicate.
  • a bleach stabiliser which includes an alkaline earth metal salt and one or more fatty acids, or one or more alkaline earth metal fatty acid salts.
  • the bleach stabiliser aids the stability of alkaline peroxide based bleaches, wherein the alkali used is chosen from the group that includes sodium hydroxide and sodium carbonate.
  • the peroxide based bleach to be stabilised is a hydrogen peroxide based bleach.
  • the alkali may be present in the bleach stabiliser before addition to the bleach.
  • the alkaline earth metal is magnesium.
  • the alkaline earth metal salt is a sulphate salt.
  • the alkaline earth metal salt is magnesium sulphate.
  • the one or more fatty acids are selected from the group that includes stearic, lauric, myristic, palmitic, arachidic, behenic, and lignoceric acids.
  • the use of lower molecular weight acids such as caproic, caprylic or capric or unsaturated acids such as oleic acid in whole or in part is not excluded.
  • Stearic acid could also be one, preferably the major, component of a general mix of fatty acids, a generally available natural product obtainable from animal or vegtable sources.
  • the one or more fatty acids could also be provided for 4 use in the present invention in the form of salts, eg. sodium, potassium or ammonium salts.
  • the fatty acid is present in a greater stoichiometric amount than the alkaline earth metal salt. Also preferably, the fatty acid(s) are generally saturated.
  • the alkaline earth metal fatty acid salts may also be formed from one or more acids selected from the group including lauric, myristic, palmitic, stearic, arachidic, behenic and lignoceric acids.
  • the acids are preferably wholly or substantially stearic acid salts.
  • a prefered alkaline earth metal fatty acid salt is magnesium stearate.
  • the bleach stabiliser includes one or more sequestrants, possibly in form of salts.
  • the sequestrant (s) could be selected from the group which includes alkenenitriloacetic acids or salts thereof, polyacrylates, aminopolycarboxylic acids and their salts, polyphosphonic acids, hydroxycarboxylic acids and their salts, polyphosphates , and polymeric carboxylic acids.
  • the alkenenitriloacetic acids could be selected from the group that includes diethylene tertraamine pentaacetic acid (DTPA) and ethylene diamine tetraacetic acid (EDTA).
  • DTPA diethylene tertraamine pentaacetic acid
  • EDTA ethylene diamine tetraacetic acid
  • the salts of the one or more of the sequesterants are sodium salts.
  • the bleach stabiliser is used concurrently with sodium silicate. 5
  • the bleach stabiliser is composed of sodium stearate (0.5-2.0g), magnesium sulphate (0.25-0.5g) and a 40% solution of the sodium salt of DTPA (l-3g), which is used in one litre of alkaline bleach.
  • the bleach stabiliser is effective at bleaching temperatures above 70°C.
  • the bleach stabiliser could also include a peroxide activator when the bleach stabiliser is to be used at temperatures lower than 85°C.
  • the bleach stabiliser could be formed as a solid or a liquid.
  • a concentrated solid stabiliser can be prepared from dry ingredients with appropriate blending.
  • a dry blend could include a surfactant, eg an alkali stable surfactant.
  • the dry blend could also or alternatively be provided in a finely divided state.
  • the bleach stabiliser is prepared prior to use in the bleach bath.
  • the bleach stabiliser can be made up in situ in the bleach bath. This could also allow the use of ingredients such as stearic acid as the fatty acid, and a magnesium salt such as magnesium sulphate, to form in situ, as an alternative to using eg. magnesium stearate per se, which is generally more expensive.
  • a process for preparing a bleach stabiliser comprising the step of admixing an alkaline earth metal salt and one or more fatty acids. 6
  • the admixing of ingredients may be carried out using any suitable process known in the art.
  • the formulation could include a surfactant.
  • a dispersing wetting agent often also a surfactant, could be used to assist in wetting and dispersing the stabiliser.
  • Thickening agents may also be added to stabilise a liquid formulation.
  • the surfactant is primarily chosen to assist in the preparation of the formulation, although suitable surfactants could also assist in the bleaching process.
  • a method of bleaching a material wherein bleach and a bleach stabiliser as herein defined are added to the material.
  • the bleach stabiliser of the present invention is suitable for use in both continuous and batch bleaching process, particularly in bleaching which uses hydrogen peroxide.
  • the use of a surfactant assists with the introduction of the bleach stabiliser into a liquid, generally aqueous, bleaching operation.
  • a bleach stabiliser according to the present invention was prepared in the following manner.
  • Tween 65 polyoxyethylene sorbitan tristearate, a dispersing agent
  • stearic acid in the form of beads was then added with high shear mixing, followed by the addition of 68 parts of magnesium stearate.
  • a sequestrant such as 20-60 parts of an a inopolyphosphonic acid, can optionally be added to the formulation. Any sequestrant should be added as the final component so as not to interfere with the magnesium in the mixture.
  • An alternative formulation could be similarly formed using sodium stearate or soap in the place of stearic acid. Any concern over the low solubility of these products in water can be overcome by the use of electrolytes or solvents to reduce the solubility of the soap or sodium stearate.
  • Products such as those formed above could be used in batch bleaching at levels between 1 to 3g/ltr, depending on the degree of stabilisation required, the material being bleached, and the amount of peroxide used to achieve a desired level of whiteness.
  • a dry bleach stabilising formulation according to the present invention could be formed from the blending together of 12 parts of sodium stearate and 68 parts of magnesium stearate.
  • a surfactant is added, such as 2 parts of an ethoxylated stearyl phosphate 8 ester (eg Crodafos S2A from Croda Oleochemicals ) .
  • a stabiliser is formulated by mixing together 100 parts of water 31 parts of magnesium sulphate hepta hydrate (Epsom salts) 84 parts of commercial stearic acid (Crosterene SB4020 from Croda Chemicals)
  • a high speed stirrer In order to reduce the particle size of the stearic acid a high speed stirrer is used.
  • the formulation is stabilised using a thickener of a suitable type and the pH should be adjusted to between 5 and 6 in order to ensure stability. If the pH is allowed to rise to alkaline levels then this could allow the formulation of soluble or partially soluble salts. These will tend to form a gel and make the product difficult to dispense.
  • This formulation was used to successfully stabilise the bleaching of linen rove which had been previously treated in alkali.
  • the level of whiteness obtained using this embodiment 9 of the bleach stabiliser in the bleach was the same as that achieved using 12-15 ml of 35% aqueous hydrogen peroxide per litre, when sodium silicate was employed as the stabiliser. In some instances satisfactory bleaching was obtained using as little as 4 ml of 35% aqueous hydrogen peroxide per litre in small scale trials.

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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)

Abstract

L'invention concerne un stabilisant de blanchiment comprenant un sel de métal alcalino-terreux et un ou plusieurs acides gras, ou bien un ou plusieurs métaux alcalino-terreux ou sels d'acides gras. De préférence, ce stabilisant comprend un agent séquestrant et le sel de métal alcalino-terreux est un sulfate de magnésium. Ce stabilisant aide à stabiliser les agents de blanchiment à base de peroxyde alcalin, notamment l'agent de blanchiment à base de peroxyde d'hydrogène. Ce stabilisant évite l'utilisation de silicate de sodium, et on peut l'employer dans des procédés de blanchiment en continu ou par lots.
PCT/GB1999/000352 1998-02-27 1999-02-17 Stabilisant de blanchiment comprenant des sels d'acides gras WO1999043781A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24340/99A AU2434099A (en) 1998-02-27 1999-02-17 Bleach stabiliser including fatty acid salts

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9804068.6 1998-02-27
GBGB9804068.6A GB9804068D0 (en) 1998-02-27 1998-02-27 Bleach stabiliser

Publications (1)

Publication Number Publication Date
WO1999043781A1 true WO1999043781A1 (fr) 1999-09-02

Family

ID=10827630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1999/000352 WO1999043781A1 (fr) 1998-02-27 1999-02-17 Stabilisant de blanchiment comprenant des sels d'acides gras

Country Status (3)

Country Link
AU (1) AU2434099A (fr)
GB (1) GB9804068D0 (fr)
WO (1) WO1999043781A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000023555A1 (fr) * 1998-10-22 2000-04-27 Colgate-Palmolive Company Composition de blanchiment liquide epaissie a base de peroxyde d'azote
EP2698143A1 (fr) * 2012-08-13 2014-02-19 Kao Germany GmbH Composition dýoxydation aqueuse
CN103924438A (zh) * 2013-12-16 2014-07-16 苏州芳然纺织有限公司 一种纺织用稳定剂

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4915698A (fr) * 1972-06-06 1974-02-12
JPS5137086A (fr) * 1974-09-25 1976-03-29 Nippon Peroxide Co Ltd
DE2532866A1 (de) * 1975-07-23 1977-01-27 Degussa Verfahren zur behandlung von textilien
JPS5663089A (en) * 1979-10-22 1981-05-29 Oji Paper Co Deinking of waste paper pulp
EP0086511A1 (fr) * 1982-02-03 1983-08-24 THE PROCTER & GAMBLE COMPANY Compositions détergentes liquides contenant un agent de blanchiment oxydant
EP0503516A1 (fr) * 1991-03-13 1992-09-16 Solvay Interox GmbH Procédé pour améliorer la stabilité en stockage de percarbonate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4915698A (fr) * 1972-06-06 1974-02-12
JPS5137086A (fr) * 1974-09-25 1976-03-29 Nippon Peroxide Co Ltd
DE2532866A1 (de) * 1975-07-23 1977-01-27 Degussa Verfahren zur behandlung von textilien
JPS5663089A (en) * 1979-10-22 1981-05-29 Oji Paper Co Deinking of waste paper pulp
EP0086511A1 (fr) * 1982-02-03 1983-08-24 THE PROCTER & GAMBLE COMPANY Compositions détergentes liquides contenant un agent de blanchiment oxydant
EP0503516A1 (fr) * 1991-03-13 1992-09-16 Solvay Interox GmbH Procédé pour améliorer la stabilité en stockage de percarbonate

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 7446, Derwent World Patents Index; AN 74-79793v, XP002101100 *
DATABASE WPI Week 7620, Derwent World Patents Index; AN 76-36601x, XP002101099 *
DATABASE WPI Week 8129, Derwent World Patents Index; AN 81-52380D, XP002101101 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000023555A1 (fr) * 1998-10-22 2000-04-27 Colgate-Palmolive Company Composition de blanchiment liquide epaissie a base de peroxyde d'azote
EP2698143A1 (fr) * 2012-08-13 2014-02-19 Kao Germany GmbH Composition dýoxydation aqueuse
WO2014026927A1 (fr) * 2012-08-13 2014-02-20 Kao Germany Gmbh Composition oxydante aqueuse
US9492362B2 (en) 2012-08-13 2016-11-15 Kao Germany Gmbh Aqueous oxidizing composition
CN103924438A (zh) * 2013-12-16 2014-07-16 苏州芳然纺织有限公司 一种纺织用稳定剂

Also Published As

Publication number Publication date
AU2434099A (en) 1999-09-15
GB9804068D0 (en) 1998-04-22

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