EP0804531A1 - Procede favorisant l'elimination des taches - Google Patents

Procede favorisant l'elimination des taches

Info

Publication number
EP0804531A1
EP0804531A1 EP96900628A EP96900628A EP0804531A1 EP 0804531 A1 EP0804531 A1 EP 0804531A1 EP 96900628 A EP96900628 A EP 96900628A EP 96900628 A EP96900628 A EP 96900628A EP 0804531 A1 EP0804531 A1 EP 0804531A1
Authority
EP
European Patent Office
Prior art keywords
weight
alkali metal
bicarbonate
stain
alkali
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Withdrawn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
EP96900628A
Other languages
German (de)
English (en)
Inventor
John Frederick Carr
Brian Davis
Patrick Boittiaux
Daniel Joubert
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.)
Rhodia Ltd
Original Assignee
Rhone Poulenc Chimie SA
Rhone Poulenc Chemicals 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
Priority claimed from GBGB9501047.6A external-priority patent/GB9501047D0/en
Priority claimed from GBGB9522532.2A external-priority patent/GB9522532D0/en
Application filed by Rhone Poulenc Chimie SA, Rhone Poulenc Chemicals Ltd filed Critical Rhone Poulenc Chimie SA
Publication of EP0804531A1 publication Critical patent/EP0804531A1/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Withdrawn legal-status Critical Current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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/08—Silicates
    • 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
    • C11D3/10—Carbonates ; Bicarbonates
    • 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

Definitions

  • the invention relates to methods for reducing stain and to detergent formulations, especially for machine dish ⁇ washing. It is known that the addition of sequestrants such as ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) to detergent compositions in concentrations above the amount required to sequester the hardness of the water in which the composition is to be used, aids reducing stain on for example, crockery.
  • sequestrants such as ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA)
  • EDTA has the drawback that it is not biodegradable. Recent legislation bans it from certain applications. There are doubts about the safety of NTA. Thus alternatives to NTA and EDTA are needed.
  • Sodium tripolyphosphate (STPP) and tetrapotassium pyrophosphate (TKPP) have been used instead of EDTA and NTA.
  • STPP Sodium tripolyphosphate
  • TKPP tetrapotassium pyrophosphate
  • the present invention provides a method for reducing stain which comprises applying to a stain the chelating agent N,N-bis(carboxymethyl)glutamic acid or a salt thereof (hereinafter referred to by the abbreviation GLUDA) .
  • GLUDA N,N-bis(carboxymethyl)glutamic acid or a salt thereof
  • German Patent specification DE-A-4211713 discloses methods of producing N,N-diacetic-aminodicarboxylic acids including GLUDA. These methods include the following:
  • GLUDA may also be obtained by reacting glutamic acid with sodium monochloroacetate under alkaline conditions or by the processes disclosed in, for example, United States Patent US-2500019 and UK Patent Specification GB1439518.
  • GLUDA is biodegradable and breaks down into C0 2 and H 2 0 without the formation of any undesirable by-products. Its superiority to EDTA and NTA in this respect is shown by the following results from the Zahn ellens Inherent
  • the method of the invention is preferably applied to tannin-derived based stains, for example stains produced by hot water extracts from tannin-containing substances.
  • tannin-derived based stains for example stains produced by hot water extracts from tannin-containing substances.
  • stains include stains derived from tea, coffee, cocoa, red wine or fruit extracts, for example blackcurrant or tomato juice.
  • the method of the invention is preferably applied to stain present on glass, steel, enamel, crockery or plastics. These materials may be, for example, in the form of cups, saucers, plates, bowls, pots or pans.
  • the method of the invention may also optionally be applied to cutlery or fabrics.
  • the method of the invention is preferably carried out at a temperature of 40 to 80°C, more preferably about 60°C.
  • GLUDA is preferably used as an alkali metal salt or ammonium salt, more preferably the tetrasodium salt.
  • GLUDA is generally applied in the form of an aqueous solution preferably containing up to 50% GLUDA by weight, more preferably 25 to 50 and typically 38%. It is preferably employed in association with a surfactant and/or an alkali. Suitable alkalis include sodium hydroxide.
  • the method of the invention is conveniently applied in machine dish-washing.
  • detergent formulations which are suitable for use in the method of the invention are those which comprise GLUDA in association with an alkali and/or a surfactant (particularly a low foam surfactant) and include formulations such as:
  • Miravon B79R and Miravon B12DF are biodegradable low foam non ionic surfactants and Mirataine JC.HA is a low foam amphoteric surfactant.
  • a detergent composition comprising (a) N,N- bis(carboxymethy1)-glutamic acid or a salt thereof in an amount of up to 50% by weight, (b) (as alkali) an alkali metal carbonate, or bicarbonate or sesquicarbonate or cogranulates of an alkali metal carbonate and silicate, or mixtures thereof in an amount of up to 60% by weight, and (c) at least one low foam non-ionic surfactant in an amount of up to 10% by weight.
  • This composition preferably comprises 20 to 45 weight % of (a) , from 10 to 50 weight % of (b) , and from 0.5 to 6 weight % of (c) .
  • (b) is a mixture of an alkali metal bicarbonate and cogranulates of an alkali metal carbonate and silicate in a bicarbonate/cogranulates ratio of 70/30 to 30/70 by weight.
  • non-ionic surfactant (b) examples include polyoxyethylene and/or polyoxypropylene condensates of saturated or unsaturated, linear or branched chain C8-C18 aliphatic carboxylic acids containing about 5-50 ethylene oxide or propylene oxide units;
  • polyoxyethylene/polyoxypropylene block copolymers where the polyoxyethylene part represents about 40% of the block copolymer, and having a molecular weight of about 2,000-
  • composition according to the invention more preferably comprises from 0.5 to 6% by weight of (b) .
  • the pH of the detergent compositions is preferably from
  • the detergent composition of the invention may optionally comprise other additives such as bleaching agents, high molecular mass polyoxyethylene glycols (e.g. from 0.05 to 0.5% of a polyethylene glycol having a molecular weight Mw of from 1,000,000 to 10,000,000, preferably from 3,000,000 to 7,000,000.), enzymes, loading charges, amphoteric surfactants, silicates, anti-foaming agents.
  • additives such as bleaching agents, high molecular mass polyoxyethylene glycols (e.g. from 0.05 to 0.5% of a polyethylene glycol having a molecular weight Mw of from 1,000,000 to 10,000,000, preferably from 3,000,000 to 7,000,000.), enzymes, loading charges, amphoteric surfactants, silicates, anti-foaming agents.
  • bleaching agents include halogen and peroxygen type bleaches.
  • Suitable halogen bleaches include di- or tri-chloro or bromo cyanuric acid and hydrosoluble salts thereof, particularly potassium and sodium dichloroisocyanurates.
  • haloqen bleaches are lithium, sodium or calcium hypochlorite or hypobromite, preferably in a quantity of from 0.05 to 5% by weight, more preferably from 0.5 to 3%.
  • Oxygen bleaches include alkali and ammonium salts of perborates, percarbonates, persulfates, dipersulfates. They are preferably employed in a quantity of from 0.5 to 20% by weight, more preferably from 0.5 to 10% by weight. Oxygen bleaches are generally used in conjunction with an activator such as tetraacetyl ethylene diamine (TAED) .
  • TAED tetraacetyl ethylene diamine
  • antifoaming agents examples include hydrocarbon oils, silicone oils and their mixtures with silica.
  • Suitable loading agents include inorganic salts apart from the alkali used as (b) , such as alkali metal sulfates, preferably in a quantity up to 20% by weight.
  • alkyl mono and/or diamphoacetates such as cocoa phoacetates
  • alkylamidopropylbetaines such as cocamidopropylbetaine, alkylbetaines, or sodium alkyliminodipropionates, such as C8 or C12 iminodipropionates
  • C8 or C12 iminodipropionates may be used, generally in a quantity up to 10% by weight.
  • silicates include sodium silicates having a molar ratio (Si0 2 /Na 2 0) of from about 1 to 3.3, preferably from 2 to about 3.3, can be present as anti-corrosion agents for metals, preferably in a quantity of up to 15% by weight
  • Enzymes may be present in a quantity of about 0.5 to 5% by weight. Minor amounts of other addititves such as perfumes, dyes, colorants, anti-tarnish agents, soil suspending agents and hydrotropes, may be present.
  • the detergent compositions are generally suitable for use in automatic dishwashers.
  • the invention is illustrated by the following examples, wherein percentages are percentages in weight.
  • EXAMPLE 1 The ability of GLUDA to reduce stain caused by tea on white china cups was compared with that for NTA and other sequestrants.
  • STPP refers to sodium tripolyphosphate
  • TKPP is tetrapotassium pyrophosphate
  • Na hexam is sodium hexametaphosphate
  • concentrations given in the above table are overbuilt concentrations. In other words they are the concentrations of the sequestrant in excess of that required to sequester only the water hardness in the tap water supply, as determined by titration before every test.
  • NTA and GLUDA were tested at product concentrations of only 50ppm greater than the water hardness, compared to concentrations of lOOppm greater than the water hardness for the remaining, less effective sequestrants. This clearly demonstrates the superior performance of GLUDA relative to alternative sequestrants.
  • Average Percentage Clean values are average values for the percentage clean obtained from performing three tests, KTPP is potassium tripolyphosphate and TKPP is tetrapotassium pyrophosphate.
  • the calibration graph was determined by completely cleaning a cup in two litres of water at 60°C for a time sufficient to remove all the tea stain.
  • the water used did not contain sequestrant.
  • the pH of the solution was adjusted to pH 11.8 and the absorbance was measured to determine the 100% clean value.
  • the solution was then successively diluted and the absorbance was measured at each concentration.
  • MILK 100 98.6 98.6 98.6
  • NABION 15 (trademark) which is cogranulates of sodium carbonate and sodium silicate with a Si0 2 /Na 2 0 ratio of 2 comprising 55% by weight of carbonate, 29% by weight of silicate and 16% by weight of water;
  • PLURAFAC LF403 (trademark) , a nonionic surfactant which is an aliphatic alcohol oxyethylene and oxypropylene;
  • POLYOX COAGULANT (trademark) a polyoxyethylene glycol with a molecular mass of 5,000,000;
  • CITRATE trisodium citrate dihydrate
  • PERBORATE mono sodium perborate mono hydrate
  • TAED tetraacetyl ethylene diamine (92% active matter) ;
  • ESPERASE a protease type enzyme, ESPERASE 4-OT (trademark) was used which has an enzymatic activity of 4.0 KNPU/g;

Abstract

Un procédé, favorisant l'élimination des taches, consiste à appliquer sur celles-ci de l'acide N,N-bis (carboxyméthyl)-glutamique ou un de ses sels.
EP96900628A 1995-01-19 1996-01-19 Procede favorisant l'elimination des taches Withdrawn EP0804531A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9501047 1995-01-19
GBGB9501047.6A GB9501047D0 (en) 1995-01-19 1995-01-19 Method for reducing stain
GB9522532 1995-11-03
GBGB9522532.2A GB9522532D0 (en) 1995-11-03 1995-11-03 Method for reducing stain
PCT/GB1996/000113 WO1996022351A1 (fr) 1995-01-19 1996-01-19 Procede favorisant l'elimination des taches

Publications (1)

Publication Number Publication Date
EP0804531A1 true EP0804531A1 (fr) 1997-11-05

Family

ID=26306344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96900628A Withdrawn EP0804531A1 (fr) 1995-01-19 1996-01-19 Procede favorisant l'elimination des taches

Country Status (3)

Country Link
EP (1) EP0804531A1 (fr)
AU (1) AU4453696A (fr)
WO (1) WO1996022351A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101784514B (zh) 2007-08-17 2013-12-04 阿克佐诺贝尔股份有限公司 谷氨酸n,n-二乙酰胺、谷氨酸n-乙酰胺n-乙腈、其碱金属盐、其制备方法及其用途
JP5462804B2 (ja) 2008-01-09 2014-04-02 アクゾ ノーベル ナムローゼ フェンノートシャップ キレート化剤を含有する酸性水溶液及び該水溶液の使用

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195594B1 (fr) * 1972-08-09 1974-10-25 Santerre Orsan
US4822886A (en) * 1987-08-12 1989-04-18 American Cyanamid Company Cyclic N-hydroxyimides

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9622351A1 *

Also Published As

Publication number Publication date
WO1996022351A1 (fr) 1996-07-25
AU4453696A (en) 1996-08-07

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