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EP1105452A1 - Compositions liquides de blanchiment - Google Patents

Compositions liquides de blanchiment

Info

Publication number
EP1105452A1
EP1105452A1 EP99940386A EP99940386A EP1105452A1 EP 1105452 A1 EP1105452 A1 EP 1105452A1 EP 99940386 A EP99940386 A EP 99940386A EP 99940386 A EP99940386 A EP 99940386A EP 1105452 A1 EP1105452 A1 EP 1105452A1
Authority
EP
European Patent Office
Prior art keywords
polyacrylate
polymer
bleaching composition
composition
weight
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.)
Withdrawn
Application number
EP99940386A
Other languages
German (de)
English (en)
Inventor
Michael Harris
Clare Louise Ewin
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.)
Jeyes Group Ltd
Original Assignee
Jeyes Group Ltd
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 Jeyes Group Ltd filed Critical Jeyes Group Ltd
Publication of EP1105452A1 publication Critical patent/EP1105452A1/fr
Withdrawn legal-status Critical Current

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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
    • C11D3/3765—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in liquid 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/395—Bleaching agents
    • C11D3/3956—Liquid compositions

Definitions

  • the present invention relates to liquid bleaching compositions particularly hypohalite based compositions.
  • Liquid bleaching compositions have a particular use in cleaning surfaces. Available compositions include those which are suitable for direct application to work surfaces, utensils, cookers, and the like to aid the removal of persistent soiling, as well as having a cleansing effect. Some compositions are proposed for automatic dishwashing, and some are suited to laundry washing applications. The present application is particularly concerned with liquid bleaching compositions which are primarily used for cleaning toilet bowls.
  • the surface of a toilet bowl above the waterline, and particularly under the rim of the bowl is coated with a liquid bleaching composition once a day, or once a week in domestic environments.
  • the composition will remain in place until the toilet is next used, which may be several hours later.
  • Some of the composition will, inevitably, flow down the bowl surface into the water in the bowl.
  • Some liquid bleaching compositions have a tendency to cause limescale deposition (that is deposition of relatively insoluble calcium and magnesium salts), particularly in the region of the rim and also from the water in the toilet bowl. This can impair the shine of the bowl surface which is undesirable as the shine will denote cleanliness to the user, as well as forming a site for enhanced limescale deposition even at other times when the bowl is not treated with the bleaching composition.
  • limescale deposition in a toilet bowl can be reduced by incorporating a polyacrylate polymer in the bleaching composition.
  • a first aspect of the present invention provides the use, in a bleaching composition, of a polyacrylate polymer for the purpose of inhibiting limescale deposition when the bleaching composition is used in a toilet bowl.
  • a second aspect of the invention provides a process of cleaning a toilet bowl, comprising coating the surface of the bowl with a liquid bleaching composition which incorporates a polyacrylate polymer to inhibit limescale deposition in the bowl in the presence of the composition.
  • the bleaching composition is a thick composition, having a viscosity of at least about 50 cps measured at 20 degrees centigrade with a Brookfield LV viscometer, spindle 2.
  • the viscosity is preferably less than about 5000 cps, and most preferably is in the range from about 300 to about 500 cps.
  • the present invention also contemplates a thick bleaching composition incorporating a carboxylic type polyacrylate polymer.
  • the bleaching composition very preferably is a hypohalite based composition, particularly sodium and/or potassium hypochlorite.
  • polyacrylate family of polymers has long been recognised as having efficacy in liquid bleaching compositions for various uses and reasons.
  • Higher molecular weight polymers may simply be used as viscosity enhancers, whilst a variety of polymers are proposed as sequestering agents, particularly to stabilise chlorine based bleaching compositions during storage by sequestering metal ions, and also as sequestrants in many laundry formulations.
  • EP-A-824 147 describes a liquid bleaching compositions for laundry use.
  • the compositions incorporate sodium hypochlorite as the bleaching agent and 0.2 weight % or less of a polyacrylate polymer. These compositions have a reduced tendency to cause fabric damage and yellowing and are suitable for use with natural fabrics as well as synthetics.
  • US-A-3 663 442 also describes a liquid bleaching composition for whitening fabrics, incorporating a terpolymer.
  • WO97/43395 describes the use of a polycarboxylate sequestrant to reduce the attack of manganese and iron cations on fabrics during laundry washing.
  • EP-A-442 191 describes a liquid bleaching composition for detergent use, in particular removing milk solids from utensils and work surfaces.
  • the compositions have an active chlorine source, a high alkali metal hydroxide content (10 weight %) and an acrylic co-polymer.
  • the specific copolymers used are thought to be active at the site of the soil, removing calcium from the protein-calcium-fat complexes to break down the complex.
  • EP-A-606 707 describes the use of a cross-linked polyacrylate polymer to increase the viscosity and reduce odour of a liquid bleach for hard surface cleaning.
  • US-A-4 839 077 uses an ethylene and acrylic acid copolymer to thicken a liquid bleach for surface cleaning.
  • EP-A-373 864 describes a thickened aqueous bleach composition which is particularly suited to toilet bowls.
  • EP-A-018 344 describes the use of sodium polyacrylate to inhibit manganese staining in toilet bowls.
  • the polyacrylate is contained in a separate dispenser to the bleaching compound.
  • polyacrylates Despite the apparently widespread use of polyacrylates, the selection of an appropriate polyacrylate is not straightforward. Some polymers can have a decomposing effect on sodium hypochlorite as well as affecting the viscosity. These parameters must remain within acceptable limits during the expected storage time of the bleach.
  • the polyacrylate is a carboxylic polymer, that is a polymer formulated from unsaturated carboxylic acid monomer units such as acrylic acid.
  • the poly(acrylic acid) polymer is preferred.
  • the liquid bleaching composition used in this invention preferably incorporates a polyacrylate having weight average a molecular weight less than 5,000 and preferably from about 2,000 to about 5,000, more preferably from about 2,000 to about 4,000 and most preferably from about 3,000 to about 4,000.
  • the polyacrylate is a phosphono terminated carboxylic polymer having a weight average molecular weight of about 3,500.
  • a polymer is marketed by Rohm & Haas under the trade name NORASOL 470 N.
  • the polyacrylate is present in an amount of from about 0.001 to about 2 per cent by weight, preferably less than 1.0 per cent and more preferably about 0.1 to about 0.5 per cent. It is particularly preferred if the polacrylate is present in an amount from about 0.2 to about 0.3 per cent, with 0.25 percent being the preferred amount as a balance between cost and performance.
  • the preferred liquid bleaching composition utilises a hypohalite, preferably a hypochlorite and, preferably in an amount of from about 0.5 to about 10 percent by weight, preferably from about 3 to about 7 per cent, and most preferably about 5 per cent by weight of the composition.
  • a potassium hypohalite is particularly preferred.
  • a sodium hypohalite may also be used, and may be used in combination with a potassium hypohalite.
  • a thickening agent other than a polyacrylate is preferred.
  • the thickening agent is used to give the required viscosity of the formulation.
  • Thickening agents are discussed in, for example, EP-A-137 551, EP-A-256 638 and WO 95/02664.
  • a particularly preferred thickening agent is a combination of alkyl ether sulphate and alkoyl sarcosinate.
  • Preferably the thickening agent will be present in an amount of less than about 5% by weight of the composition.
  • alkaline sodium or potassium hydroxide is preferably present in an amount less than 5 % by weight, more preferably less than about 2.0 % by weight of the composition, and preferably between about 0.6 and about 1.0 % by weight.
  • Alkaline buffering agents such as sodium or potassium carbonate, silicate or phosphate may also be used.
  • a bleach stable perfume may also be present, and a colourant such as a phthalocyanine.
  • LMW-45N is a polyacrylic acid homopolymer of molecular weight about 4,500.
  • 470 N is a carboxylic polymer having a phosphono end group, MWt. about 3,500.
  • 440 N is a carboxylic polymer having a phosphino end group, MWt. about 3,500.
  • 420 is a carboxylic polymer having a phosphono end group, MWt. about 2000.
  • the formulations were stored for 3 days at room temperature and then 16.5 ml aliquots of the control solution and of the exemplary formulations were added to respective beakers containing 1 litre of tap water having a hardness of about 300 ppm measured as CaC0 3 .

Landscapes

  • 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)
  • Detergent Compositions (AREA)

Abstract

Cette composition liquide de blanchiment à l'hypochlorite de sodium renferme un polyacrylate de faible poids moléculaire et ce, afin d'empêcher le dépôt de tartre lorsque la composition est utilisée dans une cuvette de cabinets.
EP99940386A 1998-08-19 1999-08-19 Compositions liquides de blanchiment Withdrawn EP1105452A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9818131 1998-08-19
GBGB9818131.6A GB9818131D0 (en) 1998-08-19 1998-08-19 Liquid bleaching compositions
PCT/GB1999/002765 WO2000011128A1 (fr) 1998-08-19 1999-08-19 Compositions liquides de blanchiment

Publications (1)

Publication Number Publication Date
EP1105452A1 true EP1105452A1 (fr) 2001-06-13

Family

ID=10837550

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99940386A Withdrawn EP1105452A1 (fr) 1998-08-19 1999-08-19 Compositions liquides de blanchiment

Country Status (4)

Country Link
EP (1) EP1105452A1 (fr)
AU (1) AU5437299A (fr)
GB (1) GB9818131D0 (fr)
WO (1) WO2000011128A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19904230A1 (de) * 1999-02-04 2000-08-10 Henkel Kgaa Verwendung von phosphonsäure-modifizierten Polyacrylaten als Sequestriermittel
AU2002368083A1 (en) * 2002-07-03 2004-01-23 Deoflor S.P.A System, liquid composition and method for cleaning and disinfecting a toilet bowl

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0407187A3 (en) * 1989-07-07 1991-07-17 Unilever Plc Aqueous thixotropic cleaning composition
EP0649898A3 (fr) * 1993-10-22 1996-02-28 Clorox Co Agent de récurage blanchissant, aqueux épaissi à phase stable.
WO1996035771A1 (fr) * 1995-05-11 1996-11-14 Reckitt & Colman Inc. Detergent epaissi contenant des abrasifs inorganiques et un agent de blanchiment de type hypochlorite
EP0812904A3 (fr) * 1996-06-10 1999-05-26 The Procter & Gamble Company Compositions nettoyantes
EP0824146B1 (fr) * 1996-08-12 2003-06-04 The Procter & Gamble Company Compositions de blanchiment
US5911909A (en) * 1996-11-12 1999-06-15 S. C. Johnson & Son, Inc. Acidic bleaching solution, method of preparation and a bleaching system for forming the same
ATE360679T1 (de) * 1997-09-19 2007-05-15 Procter & Gamble Selbstverdickende bleichmittelzusammensetzungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0011128A1 *

Also Published As

Publication number Publication date
GB9818131D0 (en) 1998-10-14
WO2000011128A1 (fr) 2000-03-02
AU5437299A (en) 2000-03-14

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