EP2285746A1 - Water softener composition - Google Patents

Water softener composition

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Publication number
EP2285746A1
EP2285746A1 EP07847012A EP07847012A EP2285746A1 EP 2285746 A1 EP2285746 A1 EP 2285746A1 EP 07847012 A EP07847012 A EP 07847012A EP 07847012 A EP07847012 A EP 07847012A EP 2285746 A1 EP2285746 A1 EP 2285746A1
Authority
EP
European Patent Office
Prior art keywords
acid
composition
granulate
meth
composition according
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Withdrawn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
EP07847012A
Other languages
German (de)
French (fr)
Inventor
Cathy Van Boven
Robbert De Boer
Janco Van Ommen
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.)
Dalli Werke GmbH and Co KG
Original Assignee
Dalli Werke GmbH and Co KG
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 Dalli Werke GmbH and Co KG filed Critical Dalli Werke GmbH and Co KG
Priority to EP07847012A priority Critical patent/EP2285746A1/en
Publication of EP2285746A1 publication Critical patent/EP2285746A1/en
Withdrawn legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D11/00Special methods for preparing compositions containing mixtures of detergents
    • C11D11/0082Special methods for preparing compositions containing mixtures of detergents one or more of the detergent ingredients being in a liquefied state, e.g. slurry, paste or melt, and the process resulting in solid detergent particles such as granules, powders or beads
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L35/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/06Powder; Flakes; Free-flowing mixtures; Sheets
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/37Polymers
    • C11D3/3746Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3757(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/37Polymers
    • C11D3/3746Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3757(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
    • C11D3/3761(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in solid compositions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/04Surfactants, used as part of a formulation or alone
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L35/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L35/02Homopolymers or copolymers of esters

Definitions

  • the present invention relates to a water soluble composition, for ex- ample a water softener composition and a co-granulate comprising the composition.
  • the invention further relates to a laundry or automatic dishwashing detergent formulation comprising the composition or the co-granulate.
  • Another object of the present invention is a tablet comprising the composition, the co-granulate or the detergent formulation.
  • a further object of the present invention are methods for the preparation of the co-granulate.
  • Ion exchange agents include alkali metal alumi-
  • aluminosili- cates of the general formula (Na 2 O) 0 .8-i.5 • AI 2 O 3 ⁇ (SiO 2 )o.8-6 typically have a calcium ion exchange capacity of at least 50 mg CaO per gram of aluminosilicate and incorporate some water.
  • Preferred sodium aluminosilicates within the above formula contain 1.5-3 SiO 2 units. Both amorphous and crystalline aluminosilicateso can be prepared by reaction between sodium silicate and sodium aluminate, as described in the literature.
  • Suitable crystalline sodium aluminosilicate ionexchange detergency builders are described, for example, in GB-A-1429143 (Procter & Gamble).
  • the preferred sodium aluminosilicates of this type are the well known commercially available zeolites A and X, and mixtures thereof.
  • zeolite P described in EP-A-384 070 (Unilever).
  • Another class of ion exchange agents which can be used for removing calcium and magnesium ions from water are the layered sodium silicate builders, such as are disclosed in US-A-4,464,839 and US-A-4,820,439 and also referred to in EP-A-551 375.
  • Ion capture agents Agents which prevent metal ions from forming insoluble salts or reacting with surfactants, such as e.g. polyphosphate, mono- meric polycarbonates, such as citric acid or salts thereof, EDTA, aligns or algi-5 nates.
  • surfactants such as e.g. polyphosphate, mono- meric polycarbonates, such as citric acid or salts thereof, EDTA, aligns or algi-5 nates.
  • EP-A-O 628 627 (Benckiser GmbH) discloses a water-soluble water softener in form of a tablet comprising A) 60-98 % by weight of a combination of a) citrate and/or citric acid and b) a polymer with water softening effect in a weight ratio between a:b of from 70:30 to 50:50, preferably of from 65:35 to 55:45, B) of from 0.5 to 6% by weight of polyethylene glycol and C) of from 0 to 38% by weight of further adjuvants.
  • the water softening tablets known from EP-A-O 628 627 are thus characterised by a special ratio between citrate and/or citric acid and polymer and by a comparatively high content of
  • EP-A-O 812 808 discloses water softening tablets comprising in addition to optional usual adjuvants and additives 10 to 70 wt-% of a polyfunctional carboxylic acid and/or a salt thereof calculated as trisodium citrate dihydrate, 15 to 45 wt-% of a carbonate and/or bicarbonate, 1 to 6 wt-% of a binder, 2 to 19 wt-% of a polymer, 0 to 45 wt-% of a layered silicate and/or alkali metal silicate, 0 to 15 wt-% of a disintegrating agent and 0 to 5 wt-% of a precipitation inhibitor.
  • the water softening tablets of EP-A-O 812 808 are reported to have a good water softening effect, a fast rate of dissolution in the washing water ensuring their performance while still being environmentally friendly and storage stable.
  • composition of the invention comprises in addition to optional adjuvants and additives:
  • Polycarboxylic acid homopoiymers are defined as organic ho- mopolymers of unsaturated mono, di- or polycarboxylic acids.
  • Examples of polycarboxylic acid homopoiymers in the sense of the present invention are polymers of acrylic acid, methacrylic acid, hydroxyacrylic acid, maleic acid, itaconic acid, mesaconic acid, acotinic acid, methylene malonic acid, citraconic acid. Also included by the term polycarboxylic acid homopoiymers are the derivatives and/or salts thereof.
  • poly(meth)acrylic acid includes polyacrylic acids, polyme- thacrylic acids as well as mixtures thereof.
  • the molecular weight of the polycar- boxylic acid homopoiymers in context with the present invention is usually in the range of from above 1000 up to 250,000, preferably in the range from above 1000 to 70,000.
  • a particularly preferred polymer is polyacrylic acid with a molecular weight in the range from above 1000 to 100,000, preferably in the range from above 1000 to 70,000.
  • the polycarboxylic acid homopolymers in context with the present invention are provided either as solids or in solution, preferably in 20-90 5 wt.-% aqueous solution, more preferably in 30-70 wt.-% aqueous solution.
  • Low molecular polycarboxylic acids are defined as organic car- boxylic acids with 2 or more carboxylic groups and of low molecular weight.
  • low molecular polycarboxylic acids are citric acid, lactic acid, malic acid, maleic acid, tartaric acid, agaric acid, trimellitic acid, succinic acid and the like.
  • low molecular polycarboxylic acids are the derivatives and/or salts thereof.
  • the molecular weight of the low molecular polycarboxylic acids in context with the present invention is usually up to 1000. Particular preferred acids are citric acid and/or trisodium citrate.
  • the low molecular polycarboxylic acids in context with the' present invention are provided either as solids or in solu- i5 tion, preferably in 20-90 wt.-% aqueous solution, more preferably in 30-70 wt.-% aqueous solution.
  • c) "Maleic acid or (meth)acrylic acid based copolymers" in the sense of the present invention are copolymers, including also e.g. terpolymers, of (i) one or more hydrophobic monomers or (ii) one or more hydrophobic monomers with
  • hydrophilic acid includes acrylic acid, methacrylic acid as well as mixtures thereof.
  • the molecular weight of the maleic acid or (meth)acrylic acid based copolymers in context with the present invention is usu-
  • maleic acid or (meth)acrylic acid based copolymers are the derivatives and/or salts thereof.
  • the maleic acid or (meth)acrylic acid based copolymers in context with the present invention are provided either as solids or in solution, preferably in 20-90 wt.-% aqueous solution,
  • hydrophobic monomer(s)" of the maleic acid or (meth)acrylic acid based copolymers are monomers which have a hydrophobic character either in their monomeric form or even after their polymerisation in the polymer chain.
  • Types of hydrophobic monomers are olefines or alpha-olefines with carbon chain lengths from 3 to 16 carbon atoms, unsaturated cyclic hydrocarbons, aryl compounds.
  • Preferred types of hydrophobic monomers are olefins or alpha-olefins with carbon chain lengths from 3 to 16 carbon atoms and aryl compounds.
  • hydrophobic monomers examples include styrene, methyl styrene, 2- ethylhexyl acrylate, octylacrylate, lauryl acrylate, stearyl acrylate, behenyl acrylate, 2-ethylhexyl methacrylate, octylmethacrylate, lauryl methacrylate, stearyl methacrylate, behenyl methacrylate, 2-ethylhexyl acrylamide, octylacrylamide, lauryl acrylamide, stearyl acrylamide, behenyl acrylamide, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, 1 -vinyl naphthalene, 2-vinyl naphthalene, 3-methyl styrene, 4-propyl styrene, t-butyl styrene,
  • the "hydrophilic group(s)" of the monomer(s) of the maleic acid or (meth)acrylic acid based copolymers give the monomer where it is attached to an increased hydrophilic character.
  • the hydrophilic group(s) is/are typically one or more selected from the group comprising hydroxyl, carboxamide, amine, carboxylate, carboxyl, phosphate, phosphono, phosphino, phosphonate, sulfonyl or sulfo group and the like.
  • hydrophobic monomers with hydrophilic groups of the maleic acid or (meth)acrylic acid based copolymers are monomers with a hydrophobic character that have functional groups that give the monomer a more hydrophilic or less hydrophobic character either in their monomeric form or even after their polymerisation in the polymer chain.
  • the functional groups are those listed under the topic "hydrophilic group(s)”.
  • hydrophilic monomers with hydrophilic groups of the maleic acid or (meth)acrylic acid based copolymers are monomers with functional groups which have a hydrophilic character either in their monomeric form or even after their polymerisation in the polymer chain.
  • the functional groups are those listed under the topic "hydrophilic group(s)”.
  • hydrophilic monomers with hydrophilic groups are hydrophilic monomers with hydrophilic groups
  • all sulfonic acids may also be provided as phosphonic acids or vice versa.
  • the weight ratio of the polycarboxylic acid homopolymer(s) to the low molecular polycarboxylic acid(s) is 5:1 to 1 :10, preferably 3:1 to 1 :6 and even more preferably 1 :1 to 1 :4.
  • the weight ratio of the polycarboxylic acid homopolymer(s) to the maleic acid or (meth)acrylic acid based copolymers is 20:1 to 1 :1 , preferably 8:1 to 2:1 and even more preferably 5:1 to 3:1.
  • the weight ratio of the low molecular polycarboxylic acid(s) to the maleic acid or (meth)acrylic acid based copolymers is 30:1 to 1 :2, preferably 20:1 to 5:1 and even more preferably 15:1 to 6:1.
  • composition according to the invention are further conventional adjuvants, optical brighteners, particularly a mixture of a disodium distyrylbiphenyl disulfonate derivate and a bis-
  • the composition preferably a water softener composition, comprises one or more of several co-granulates wherein these co-granulates comprises a combination of at least two of the above de- scribed polycarboxylic acid homopolymer(s), the maleic acid or (meth)acrylic acid based copolymers) and the low molecular polycarboxylic acid(s).
  • these co-granulates comprises a combination of at least two of the above de- scribed polycarboxylic acid homopolymer(s), the maleic acid or (meth)acrylic acid based copolymers) and the low molecular polycarboxylic acid(s).
  • the essential compound(s) being not comprised in the respective co-granulate are nevertheless part of the composition.
  • composition according to the invention comprises the essential polycarboxylic acid homopolymer(s), the low molecular polycarboxylic acid(s) and the maleic or (meth)acrylic acid based copolymer(s) as defined in claim 1 either as part of a certain co-granulate which itself is part of the composition or as part of the composition without such co-granulates.
  • the co-granulates may be preferred in the preparation of com- pressed tablets.
  • Compressed tablets are in many cases a preferred form of detergent formulations, especially of laundry or automatic dishwashing detergent formulations.
  • a certain co-granulate may improve the tabletability properties because some ingredient can loose their crystalline form.
  • Another certain co-granulate may level out the hygroscopicity of its ingredients or may provide both of the above ef- fects.
  • the co-granulate comprises a mixture of one or more polycarboxylic acid homopolymer(s), of one or more low molecular polycarboxylic acid(s) and of one or more maleic or (meth)acrylic acid based copolymer(s). This type of co-granulate is preferred if both the tabletability properties should be improved and the hygroscopicity of its ingredients should be levelled out.
  • the co-granulate comprises a mixture of one or more polycarboxylic acid homopolymer(s) and of one or more maleic or (meth)acrylic acid based copolymer(s).
  • the one or more low molecular polycarboxylic acid(s) are not part of the co- granulate but of the composition. This type of co-granulate is preferred if especially the hygroscopicity of its ingredients should be levelled out.
  • the co-granulate comprises a mixture of one or more polycarboxylic acid homopolymer(s) and of one or more low molecular polycarboxylic acid(s).
  • the one or more maleic or (meth)acrylic acid based copolymer(s) are not part of the co- granulate but of the composition.
  • the co-granulate comprises a mixture of one or more maleic or (meth)acrylic acid based copoly- mer(s) and of one or more low molecular polycarboxylic acid(s).
  • the one or more polycarboxylic acid homopolymer(s) are not part of the co- granulate but of the composition.
  • the average particle size of the above described co-granulates is in the range of from 0.05 to 3.0 mm, preferably in the range of from 0.1 to 2.0 mm, and even more preferably in the range of from 0.2 to 1.5 mm.
  • a disintegrating agent may advantageously form part of the composition, the co-granulate or the tablet according to the invention.
  • Such disintegrating agents are known in the art. Disintegrating agents swell at contact with water thereby accelerating the disintegration of the tablets. Examples of disintegrating agents are e. g.
  • the amount of disintegrating agent is typically in the range of from 1 to 15% by weight.
  • the several co-granulates of a polycarboxylic acid homopolymer and/or a low molecular polycarboxylic acid and/or a maleic or (meth)acrylic acid based copolymer as defined above may be prepared according to any conventional method known in the art.
  • a typical method for the preparation of a co-granulate being part of the water soluble composition comprises the steps of: a) optionally dissolving all compounds the co-granulate is prepared from, either individually or as a mixture of some or all compounds, in a solvens, preferably in water, b) optionally adjusting pH of the solution(s) to the desired level, c) if applicable blending the solutions, d) providing a homogenious (aqueous) solution comprising a polycarboxylic acid homopolymer and/or a low molecular polycar- boxylic acid and/or a maleic or (meth)acrylic acid based copolymer as defined above and as optionally prepared according to steps a to c, e) optionally adjusting the pH to the desired level, f) drying the solution into the desired particle size, and if desired g) grinding the co-granulate into the desired particle size.
  • Appropriate methods of drying are, for example, spray drying, drum
  • a preferred method for the preparation of a co-granulate being part of the water soluble composition comprises the steps of: a) making or providing an (aqueous) solution of all desired ingredients including processing aids, b) adjusting the pH to the desired level, c) drying the solution into the desired particle size, and if desired d) grinding the co- granulate into the desired particle size.
  • Appropriate methods of drying are, for example, spray drying, drum drying or freeze drying.
  • a preferred method for the preparation of a co-granulate being part of the water soluble composition comprises the steps of: a) making or providing an (aqueous) solution of the desired ingredients, b) adjusting the pH to the desired level, c) spray the solution on a solid particle, d) dry the coated particle on a fluid bed, and if desired d) the coated particle can be sieved to the desired particle size.
  • compositions preferably the water softener composition, accord- ing to the present invention may preferably be used separately or in laundry or e. g. automatic dishwashing compositions.
  • the compositions may also be used to soften water in other cleaning processes such as hard surfaces cleaning using, for example, a hand-cloth or mop.
  • the compositions according to the invention may also be used, for example, when cleaning windows, tiled surfaces, shower screens, dirty tableware and kitchenware, sanitary articles, cars or kitchen articles.
  • test cloths In a Lini-tester five white textile test cloths are washed with an automatic laundry detergent (ALD) and several different water softener (WE) compositions.
  • ALD automatic laundry detergent
  • WE water softener
  • ballast soil is an SBL cloth of 12x18 cm.
  • compositions are measured and is an indication of the amount of deposits of insoluble salts on the test cloth. A difference of 0.5% can be regarded as a reproducible difference in this test.
  • ALD automatic laundry detergent
  • WE basic water softener
  • Acrylic acid/maleic acid co-polymer pAA/MA 2% Perfume, amylase, protease, cellulose, lipase, fillers and process-aids up to 100%.
  • CP2 copolymer of acrylic acid and a sulphonated monomer for example Alcosperse 240 from Alco Chemical
  • CP3 copolymer of maleic acid and sulphonated styrene for example Versa TL-3 from Alco Chemical
  • CP4 copolymer of maleic acid and an (alpha-)olefin for example Sokalan CP9
  • optical brighteners used in the ALD is a mixture of a disodium distyrylbiphenyl disulfonate derivate and a bis-(thazinylamino)-stilbene disulfonic acid derivate as they are used in the commercially available products Tinopal CD-X and Tinopal CBS-X from Ciba.
  • This test can be regarded as three separate tests.
  • test 1 the effects of the use of a basic water softener composition in addition to an ALD are tested.
  • Test 1 Effect of the use of WE composition in addition to ALD.
  • the following combination of ALD and WE composition have been tested.
  • 1a 4.5g ALD with 0.9Og WE 1 b.
  • 7.4g ALD without WE 1d 4.5g ALD with 0.9Og WE (with 30% poly maleic acid instead of pAA)
  • Test 2 Effect of addition of (co-)polvmer to the basic WE composition.
  • the following combination of ALD and WE composition have been tested.
  • 2a 4.5g ALD with 0.9Og WE
  • Test 3 Effect of the addition of combinations of (co-)polvmers to the basic WE composition.
  • Test 1 Data relating to graying showing the effect of the use of WE com- positions in addition to ALD. detergent as described under number test cloth 1 a 1 b 1c 1 d
  • Test 1 -whitening; Data relating to whiteness showing the effect of the use of WE composition in addition to ALD. detergent as described under number test cloth 1a 1b 1c 1d
  • Test 1-ash residue Data relating to the ash-residue showing the effect of the use of WE composition in addition to ALD.
  • Test 2-graying Data relating to graying showing the effect of addition of (co-) polymer to the basic WE composition.
  • Test 2-whitening Data relating to whiteness showing the effect of addition of (copolymer to the basic WE composition. detergent as described under number test cloth 2a 2b 2c 2d 2e 2f 2g 2h 2 ⁇
  • Test 3-graying Data relating to graying showing the effect of the addition of combinations of (co-)polymers to the basic WE composition.
  • Test 3-ash residue Data relating to the ash-residue showing the effect of the addition of combinations of (co-)polymers to the basic WE composition.
  • Raising the dosage of ALD has a positive effect on the graying of polyester.
  • Raising the dosage of ALD has a positive effect on the whitening of at least cotton, polyester-cotton, polyester, polyamide and terrycloth.
  • Raising the dosage of an ALD lowers the amount of ash residue of the cotton test cloth but however does not reach the level when WE composition is added.
  • Adding (co-)polymers or combinations thereof to the WE composition does not have any effect of the ash-residue of the cotton test cloth.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
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  • Polymers & Plastics (AREA)
  • Detergent Compositions (AREA)

Abstract

It is provided a composition as a soluble water softener composition or for the preparation of a soluble water softener or detergent composition comprising in addition to optional adjuvants and additives: a) one or more polycarboxylic acid homopolymer(s) or salt(s) thereof in an amount of 1 to 90 wt.-%, b) one or more low molecular polycarboxylic acid(s) or salt(s) thereof in an amount of 1 to 90 wt.-%, and c) one or more copolymer(s) based on maleic acid or (meth)acrylic acid or salt(s) thereof in an amount of 0.1 to 25 wt.-%, wherein the one or more comonomer(s) is/are selected from the group comprising i) hydrophobic monomers, ii) hydrophobic monomers with one or more hydrophilic group(s), and iii) hydrophilic monomers with hydrophilic groups. There are further provided certain co-granulates comprising at least two of the essential ingredients of the composition, detergent formulations comprising the composition, the co-granulate and a tablet comprising the composition, the co-granulate or the detergent formulation. Furthermore, there are provided methods for the preparation of the co-granulates.

Description

WATER SOFTENER COMPOSITION
Description
TECHNICAL FIELD
[0001] The present invention relates to a water soluble composition, for ex- ample a water softener composition and a co-granulate comprising the composition. The invention further relates to a laundry or automatic dishwashing detergent formulation comprising the composition or the co-granulate. Another object of the present invention is a tablet comprising the composition, the co-granulate or the detergent formulation. A further object of the present invention are methods for the preparation of the co-granulate.
BACKGROUND ART
[0002] It is well known that certain metal compounds, notably calcium compounds, when present in water, have a significant effect on the properties of the water. For example, "hard" water containing a significant loading of soluble cal- cium and magnesium compounds may require a large amount of soap or detergent in order to form a lather. Scale deposits can readily form from such water, for example on heating or pH change or evaporation. These can be encrustations, or watermarks left on evaporation of water droplets from, especially, a shiny surface.
[0003] There have been many proposals for removal of metal ions from aqueous solutions. In the industrial context proposals have included filter beds and polymeric filters for capturing heavy metal ions from an aqueous solution flowing within a passageway. Examples are given in EP-A-99 22 38 and GB-A-20869564. [0004] The products on the market today are typically based on zeolites, polymers, phosphates and/or citrate and are often provided in liquid, powder or tableted form. Three main types of water softening agents are described below.
[0005] 1) Ion exchange agents: These agents include alkali metal alumi-
5 nosilicates either crystalline, amorphous or a mixture of thereof. Such aluminosili- cates of the general formula (Na2O)0.8-i.5 AI2O3 (SiO2)o.8-6 typically have a calcium ion exchange capacity of at least 50 mg CaO per gram of aluminosilicate and incorporate some water. Preferred sodium aluminosilicates within the above formula contain 1.5-3 SiO2 units. Both amorphous and crystalline aluminosilicateso can be prepared by reaction between sodium silicate and sodium aluminate, as described in the literature. Suitable crystalline sodium aluminosilicate ionexchange detergency builders are described, for example, in GB-A-1429143 (Procter & Gamble). The preferred sodium aluminosilicates of this type are the well known commercially available zeolites A and X, and mixtures thereof. Also of interest iss zeolite P described in EP-A-384 070 (Unilever). Another class of ion exchange agents which can be used for removing calcium and magnesium ions from water are the layered sodium silicate builders, such as are disclosed in US-A-4,464,839 and US-A-4,820,439 and also referred to in EP-A-551 375. These materials are defined in US-A-4,820,439 as being crystalline layered, sodium silicate of the gen-o eral formula NaMSixO2x+I Y HgO where M denotes sodium or hydrogen, x is from 1.9 to 4 and Y is from 0 to 20.
[0006] 2) Ion capture agents: Agents which prevent metal ions from forming insoluble salts or reacting with surfactants, such as e.g. polyphosphate, mono- meric polycarbonates, such as citric acid or salts thereof, EDTA, aligns or algi-5 nates.
[0007] 3) Anti-nucleating agents: Agents which prevent seed crystal growth, e.g. polycarbonate polymers, such as polyacrylates, acrylic/maleic copolymers, and acrylic phosphonates, and sulfonates. [0008] EP-A-O 628 627 (Benckiser GmbH) discloses a water-soluble water softener in form of a tablet comprising A) 60-98 % by weight of a combination of a) citrate and/or citric acid and b) a polymer with water softening effect in a weight ratio between a:b of from 70:30 to 50:50, preferably of from 65:35 to 55:45, B) of from 0.5 to 6% by weight of polyethylene glycol and C) of from 0 to 38% by weight of further adjuvants. The water softening tablets known from EP-A-O 628 627 are thus characterised by a special ratio between citrate and/or citric acid and polymer and by a comparatively high content of polymer, preferably of from 20 to 40% by weight.
[0009] EP-A-O 812 808 (Cleantabs A/S) discloses water softening tablets comprising in addition to optional usual adjuvants and additives 10 to 70 wt-% of a polyfunctional carboxylic acid and/or a salt thereof calculated as trisodium citrate dihydrate, 15 to 45 wt-% of a carbonate and/or bicarbonate, 1 to 6 wt-% of a binder, 2 to 19 wt-% of a polymer, 0 to 45 wt-% of a layered silicate and/or alkali metal silicate, 0 to 15 wt-% of a disintegrating agent and 0 to 5 wt-% of a precipitation inhibitor. The water softening tablets of EP-A-O 812 808 are reported to have a good water softening effect, a fast rate of dissolution in the washing water ensuring their performance while still being environmentally friendly and storage stable.
[0010] These formulations have the disadvantage that their performance lacks on the dispersing of particles for the soil from the substrates to be cleaned. These particles can cause incrustation by redepositing on the substrates, heating element or inside of the machine.
[0011] It is the object of the present invention to provide an improved water softener composition by limiting the incrustation that can be caused by the soil that is present. DESCRIPTION OF THE INVENTION
[0012] It has been found that the above-defined object can be achieved by providing a water soluble composition, preferably a water softener composition, according to claim 1 of the invention. Said composition of the invention comprises in addition to optional adjuvants and additives:
a) one or more polycarboxylic acid homopolymer(s) or salt(s) thereof in an amount of 1 to 90 wt.-%,
b) one or more low molecular polycarboxylic acid(s) or salt(s) thereof in an amount of 1 to 90 wt.-%, and
c) one or more copolymers) based on maleic acid or (meth)acrylic acid or salt(s) thereof in an amount of 0.1 to 25 wt.-%, wherein the one or more comonomer(s) is/are selected from the group comprising
i. hydrophobic monomers,
ii. hydrophobic monomers with hydrophilic groups, and
iii. hydrophilic monomers with hydrophilic groups,
or mixtures thereof.
[0013] a) "Polycarboxylic acid homopoiymers" are defined as organic ho- mopolymers of unsaturated mono, di- or polycarboxylic acids. Examples of polycarboxylic acid homopoiymers in the sense of the present invention are polymers of acrylic acid, methacrylic acid, hydroxyacrylic acid, maleic acid, itaconic acid, mesaconic acid, acotinic acid, methylene malonic acid, citraconic acid. Also included by the term polycarboxylic acid homopoiymers are the derivatives and/or salts thereof. The term "poly(meth)acrylic acid" includes polyacrylic acids, polyme- thacrylic acids as well as mixtures thereof. The molecular weight of the polycar- boxylic acid homopoiymers in context with the present invention is usually in the range of from above 1000 up to 250,000, preferably in the range from above 1000 to 70,000. A particularly preferred polymer is polyacrylic acid with a molecular weight in the range from above 1000 to 100,000, preferably in the range from above 1000 to 70,000. The polycarboxylic acid homopolymers in context with the present invention are provided either as solids or in solution, preferably in 20-90 5 wt.-% aqueous solution, more preferably in 30-70 wt.-% aqueous solution.
[0014] b) "Low molecular polycarboxylic acids" are defined as organic car- boxylic acids with 2 or more carboxylic groups and of low molecular weight. Examples of low molecular polycarboxylic acids are citric acid, lactic acid, malic acid, maleic acid, tartaric acid, agaric acid, trimellitic acid, succinic acid and the like. io Also included by the term low molecular polycarboxylic acids are the derivatives and/or salts thereof. The molecular weight of the low molecular polycarboxylic acids in context with the present invention is usually up to 1000. Particular preferred acids are citric acid and/or trisodium citrate. The the low molecular polycarboxylic acids in context with the' present invention are provided either as solids or in solu- i5 tion, preferably in 20-90 wt.-% aqueous solution, more preferably in 30-70 wt.-% aqueous solution.
[0015] c) "Maleic acid or (meth)acrylic acid based copolymers" in the sense of the present invention are copolymers, including also e.g. terpolymers, of (i) one or more hydrophobic monomers or (ii) one or more hydrophobic monomers with
2o one or more hydrophilic group(s) or (iii) one or more hydrophilic monomers with hydrophilic groups or mixtures thereof with maleic acid, acrylic acid and/or methacrylic acid. The term "(meth)acrylic acid" includes acrylic acid, methacrylic acid as well as mixtures thereof. The molecular weight of the maleic acid or (meth)acrylic acid based copolymers in context with the present invention is usu-
25 ally in the range of from above 1000 up to 100,000, preferably in the range from above 1000 to 60,000. Also included by the term maleic acid or (meth)acrylic acid based copolymers are the derivatives and/or salts thereof. The maleic acid or (meth)acrylic acid based copolymers in context with the present invention are provided either as solids or in solution, preferably in 20-90 wt.-% aqueous solution,
3o more preferably in 30-70 wt.-% aqueous solution. [0016] ci) The "hydrophobic monomer(s)" of the maleic acid or (meth)acrylic acid based copolymers are monomers which have a hydrophobic character either in their monomeric form or even after their polymerisation in the polymer chain. Types of hydrophobic monomers are olefines or alpha-olefines with carbon chain lengths from 3 to 16 carbon atoms, unsaturated cyclic hydrocarbons, aryl compounds. Preferred types of hydrophobic monomers are olefins or alpha-olefins with carbon chain lengths from 3 to 16 carbon atoms and aryl compounds.
[0017] Examples of hydrophobic monomers are styrene, methyl styrene, 2- ethylhexyl acrylate, octylacrylate, lauryl acrylate, stearyl acrylate, behenyl acrylate, 2-ethylhexyl methacrylate, octylmethacrylate, lauryl methacrylate, stearyl methacrylate, behenyl methacrylate, 2-ethylhexyl acrylamide, octylacrylamide, lauryl acrylamide, stearyl acrylamide, behenyl acrylamide, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, 1 -vinyl naphthalene, 2-vinyl naphthalene, 3-methyl styrene, 4-propyl styrene, t-butyl styrene, 4-cyclohexyl styrene, 4-dodecyl styrene, 2-ethyl-4-benzyl styrene, 4-(phenylbutyl) styrene, 1-propene, 2-propene, 1-butene, 2-butene, 1-pentene, 2-pentene, 1-hexene, 2-hexene, 3-hexene, 1- heptene, 2-heptene, 3-heptene, 1-octene, 2-octene, 3-octene, 4-octene. Preferred are styrene, methyl styrene and mentioned olefins.
[0018] Cii and ciii) The "hydrophilic group(s)" of the monomer(s) of the maleic acid or (meth)acrylic acid based copolymers give the monomer where it is attached to an increased hydrophilic character. The hydrophilic group(s) is/are typically one or more selected from the group comprising hydroxyl, carboxamide, amine, carboxylate, carboxyl, phosphate, phosphono, phosphino, phosphonate, sulfonyl or sulfo group and the like.
/00797 cii) The "hydrophobic monomers with hydrophilic groups" of the maleic acid or (meth)acrylic acid based copolymers are monomers with a hydrophobic character that have functional groups that give the monomer a more hydrophilic or less hydrophobic character either in their monomeric form or even after their polymerisation in the polymer chain. The functional groups are those listed under the topic "hydrophilic group(s)".
[0020] ciii) The "hydrophilic monomers with hydrophilic groups" of the maleic acid or (meth)acrylic acid based copolymers are monomers with functional groups which have a hydrophilic character either in their monomeric form or even after their polymerisation in the polymer chain. The functional groups are those listed under the topic "hydrophilic group(s)".
[0021] Examples of hydrophilic monomers with hydrophilic groups are
(meth)allyl sulphonic acid, vinyl sulphonic acid, vinyl phosphonic acid, dimethy- lacrylamide, dimethylaminopropylmethacrylate, diethylaminopropylmethacrylate, vinyl formamide, vinyl acetamide, vinyl pyrrolidone, vinyl imidazole, phenyl (meth)allyl ether sulfonic acid, 2-acrylamido-2-methyl propane sulfonic acid (AMPS), sulphonated styrene, allyloxybenzene sulfonic acid, allyloxy-2-hydroxy propyl sulfonic acid, 2-acryloxypropionic acid or (meth)allyl phosphonic acid, and the like or salts thereof. For example, all sulfonic acids may also be provided as phosphonic acids or vice versa.
[0022] In a preferred embodiment of the present invention the weight ratio of the polycarboxylic acid homopolymer(s) to the low molecular polycarboxylic acid(s) is 5:1 to 1 :10, preferably 3:1 to 1 :6 and even more preferably 1 :1 to 1 :4.
[0023] In a further preferred embodiment of the present invention the weight ratio of the polycarboxylic acid homopolymer(s) to the maleic acid or (meth)acrylic acid based copolymers) is 20:1 to 1 :1 , preferably 8:1 to 2:1 and even more preferably 5:1 to 3:1.
[0024] In still another preferred embodiment of the present invention the weight ratio of the low molecular polycarboxylic acid(s) to the maleic acid or (meth)acrylic acid based copolymers) is 30:1 to 1 :2, preferably 20:1 to 5:1 and even more preferably 15:1 to 6:1.
Other ingredients, which, if desired, may be included in the composition according to the invention are further conventional adjuvants, optical brighteners, particularly a mixture of a disodium distyrylbiphenyl disulfonate derivate and a bis-
(triazinylamino)-stilbene disulfonic acid derivate as they are used in the commercially available products Tinopal CD-X and Tinopal CBS-X, bleaches, bleach activators, anti-lumping agents, colour transferring inhibitors, lubricating agents, anti- redeposition agents, agents making the textiles soil-repellent, enzymes, rinsing aids, dyes, deodorising agents, antioxidants, perfumes, sulphates, bicarbonates, PEG, surfactants and without being restricted to the mentioned ingredients.
[0025] In a further aspect of the invention the composition, preferably a water softener composition, comprises one or more of several co-granulates wherein these co-granulates comprises a combination of at least two of the above de- scribed polycarboxylic acid homopolymer(s), the maleic acid or (meth)acrylic acid based copolymers) and the low molecular polycarboxylic acid(s). In these embodiments of the invention the essential compound(s) being not comprised in the respective co-granulate are nevertheless part of the composition. In other words the composition according to the invention comprises the essential polycarboxylic acid homopolymer(s), the low molecular polycarboxylic acid(s) and the maleic or (meth)acrylic acid based copolymer(s) as defined in claim 1 either as part of a certain co-granulate which itself is part of the composition or as part of the composition without such co-granulates.
[0026] The co-granulates may be preferred in the preparation of com- pressed tablets. Compressed tablets are in many cases a preferred form of detergent formulations, especially of laundry or automatic dishwashing detergent formulations. A certain co-granulate may improve the tabletability properties because some ingredient can loose their crystalline form. Another certain co-granulate may level out the hygroscopicity of its ingredients or may provide both of the above ef- fects. [0027] In one certain embodiment of the invention the co-granulate comprises a mixture of one or more polycarboxylic acid homopolymer(s), of one or more low molecular polycarboxylic acid(s) and of one or more maleic or (meth)acrylic acid based copolymer(s). This type of co-granulate is preferred if both the tabletability properties should be improved and the hygroscopicity of its ingredients should be levelled out.
[0028] In another certain embodiment of the invention the co-granulate comprises a mixture of one or more polycarboxylic acid homopolymer(s) and of one or more maleic or (meth)acrylic acid based copolymer(s). In this embodiment the one or more low molecular polycarboxylic acid(s) are not part of the co- granulate but of the composition. This type of co-granulate is preferred if especially the hygroscopicity of its ingredients should be levelled out.
[0029] In a further certain embodiment of the invention the co-granulate comprises a mixture of one or more polycarboxylic acid homopolymer(s) and of one or more low molecular polycarboxylic acid(s). In this embodiment the one or more maleic or (meth)acrylic acid based copolymer(s) are not part of the co- granulate but of the composition.
[0030] In a further certain embodiment of the invention the co-granulate comprises a mixture of one or more maleic or (meth)acrylic acid based copoly- mer(s) and of one or more low molecular polycarboxylic acid(s). In this embodiment the one or more polycarboxylic acid homopolymer(s) are not part of the co- granulate but of the composition.
[0031] The average particle size of the above described co-granulates is in the range of from 0.05 to 3.0 mm, preferably in the range of from 0.1 to 2.0 mm, and even more preferably in the range of from 0.2 to 1.5 mm. [0032] With respect to the compressed tablets a disintegrating agent may advantageously form part of the composition, the co-granulate or the tablet according to the invention. Such disintegrating agents are known in the art. Disintegrating agents swell at contact with water thereby accelerating the disintegration of the tablets. Examples of disintegrating agents are e. g. starch derivatives, cellulose compounds, polyvinylpyrrolidone compounds, polyvinylpolypyrrolidone compounds, bentonite compounds, alginates, gelatine and pectines. When used, the amount of disintegrating agent is typically in the range of from 1 to 15% by weight.
[0033] According to the present invention the several co-granulates of a polycarboxylic acid homopolymer and/or a low molecular polycarboxylic acid and/or a maleic or (meth)acrylic acid based copolymer as defined above may be prepared according to any conventional method known in the art.
[0034] However, a typical method for the preparation of a co-granulate being part of the water soluble composition according to the invention comprises the steps of: a) optionally dissolving all compounds the co-granulate is prepared from, either individually or as a mixture of some or all compounds, in a solvens, preferably in water, b) optionally adjusting pH of the solution(s) to the desired level, c) if applicable blending the solutions, d) providing a homogenious (aqueous) solution comprising a polycarboxylic acid homopolymer and/or a low molecular polycar- boxylic acid and/or a maleic or (meth)acrylic acid based copolymer as defined above and as optionally prepared according to steps a to c, e) optionally adjusting the pH to the desired level, f) drying the solution into the desired particle size, and if desired g) grinding the co-granulate into the desired particle size. Appropriate methods of drying are, for example, spray drying, drum drying or freeze drying.
[0035] However, a preferred method for the preparation of a co-granulate being part of the water soluble composition according to the invention comprises the steps of: a) making or providing an (aqueous) solution of all desired ingredients including processing aids, b) adjusting the pH to the desired level, c) drying the solution into the desired particle size, and if desired d) grinding the co- granulate into the desired particle size. Appropriate methods of drying are, for example, spray drying, drum drying or freeze drying.
[0036] However, a preferred method for the preparation of a co-granulate being part of the water soluble composition according to the invention comprises the steps of: a) making or providing an (aqueous) solution of the desired ingredients, b) adjusting the pH to the desired level, c) spray the solution on a solid particle, d) dry the coated particle on a fluid bed, and if desired d) the coated particle can be sieved to the desired particle size.
[0037] The compositions, preferably the water softener composition, accord- ing to the present invention may preferably be used separately or in laundry or e. g. automatic dishwashing compositions. However, the compositions may also be used to soften water in other cleaning processes such as hard surfaces cleaning using, for example, a hand-cloth or mop. The compositions according to the invention may also be used, for example, when cleaning windows, tiled surfaces, shower screens, dirty tableware and kitchenware, sanitary articles, cars or kitchen articles.
Examples
General test set-up
In a Lini-tester five white textile test cloths are washed with an automatic laundry detergent (ALD) and several different water softener (WE) compositions. The five types of test cloths used in this test are of the following materials
- cotton
- polyester-cotton
- polyester - polyamide
- terrycloth The washing conditions applied in this test are
- washing-temperature of 60 0C
- water hardness of 22 0GH
- amount of water is 200 ml each - duration of one washing cycle is 30 minutes.
- ballast soil is an SBL cloth of 12x18 cm.
After each wash the five white test cloths are hanged to dry at the air. After 10, 20 and 30 repetitions the change in colour of the five white cloths is measured with a Minolta Spectral photometer CM-3600d.
In the RY-value measurement the effect of optical brighteners is not visible. The change in colour in this measurement will be caused by the effect of redeposition of soil and/or insoluble salts and becomes visible as graying of the test cloths.
In the whiteness measurement the effect of optical brighteners is visible in addition to the change in colour due to redeposition.
For both of the above described measurements a difference of 3 points or more can be regarded as a visual noticeable change. The higher the score the lighter is the colour of the measured test cloth.
After 30 washes ash residue of the cotton test cloth is determined and expressed as a percentage of weight of the dry cotton test cloth. In this test the cotton cloth is incinerated in an oven until the weight is stable. The oven used in this test is an "Schnellverascher", type SVR/E.
The weight of the remaining residue is measured and is an indication of the amount of deposits of insoluble salts on the test cloth. A difference of 0.5% can be regarded as a reproducible difference in this test. Compositions
In this test an automatic laundry detergent (ALD) and a basic water softener (WE) composition are used. Both of these compositions are described in detail below.
ALD composition;
Soda 27%
Zeolite 23%
Sodium sulphate 18%
Sodium percarbonate 10% Alkyl benzene sulfonate 8%
Fatty alcohol ethoxylate 4%
Tetraacetylethylenediamine 2.2%
Optical brighteners 0.06%
Acrylic acid/maleic acid co-polymer (pAA/MA) 2% Perfume, amylase, protease, cellulose, lipase, fillers and process-aids up to 100%.
Basic WE composition;
Sodium citrate 70%
Poly acrylic acid (pAA) 30%
Some (co-)polymers (CP) or combinations thereof have been added to the basic WE composition to test the effect on the performance. These (co-)polymers (CP) are described below.
(Co-)polvmers (CP):
CP1 copolymer of acrylic acid and styrene (for example Alcosperse 747 from Alco Chemical)
CP2 copolymer of acrylic acid and a sulphonated monomer (for example Alcosperse 240 from Alco Chemical) CP3 copolymer of maleic acid and sulphonated styrene (for example Versa TL-3 from Alco Chemical) CP4 copolymer of maleic acid and an (alpha-)olefin (for example Sokalan CP9
From BASF)
CP5 copolymer of acrylic acid and AMPS (for example Alcoguard 4100 from Alco
Chemical)
Details on fluorescent whitening agent (FWA)
The optical brighteners used in the ALD is a mixture of a disodium distyrylbiphenyl disulfonate derivate and a bis-(thazinylamino)-stilbene disulfonic acid derivate as they are used in the commercially available products Tinopal CD-X and Tinopal CBS-X from Ciba.
Detailed test set-up
This test can be regarded as three separate tests.
- In test 1 the effects of the use of a basic water softener composition in addition to an ALD are tested.
- In test 2 the effects of the addition of one (co-)polymer to the WE-composition are tested.
- In test 3 the effects of the addition of combinations of these (co-)polymers to the WE-composition are tested.
The colour measurements (for graying as well as for whitening) after 10, 20 and 30 washing cycle repetitions are averaged and 'corrected' with the results of the combination of ALD with the basic WE composition. By this procedure readily can be seen what the effects of additional ingredients are.
Test 1 : Effect of the use of WE composition in addition to ALD. The following combination of ALD and WE composition have been tested. 1a. 4.5g ALD with 0.9Og WE 1 b. 4.5g ALD without WE 1c. 7.4g ALD without WE 1d. 4.5g ALD with 0.9Og WE (with 30% poly maleic acid instead of pAA) Test 2; Effect of addition of (co-)polvmer to the basic WE composition. The following combination of ALD and WE composition have been tested. 2a. 4.5g ALD with 0.9Og WE
2b. 4.5g ALD with 0.77g basic WE composition and 0.13g pAA 2c. 4.5g ALD with 0.77g basic WE composition and 0.13g CP1 2d. 4.5g ALD with 0.77g basic WE composition and 0.13g CP2 2e. 4.5g ALD with 0.77g basic WE composition and 0.13g CP3 2f. 4.5g ALD with 0.77g basic WE composition and 0.13g CP4 2g. 4.5g ALD with 0.77g basic WE composition and 0.13g CP5 2h. 4.5g ALD with 0.77g basic WE composition and 0.13g HEDP (sodium salt of hydroxyethylidene-1,1-diphosphonic acid
2i. 4.5g ALD with 0.77g basic WE composition and 0.13g DTPMP (sodium salt of diethylene triamine pentamethylene phosphonic acid
Test 3; Effect of the addition of combinations of (co-)polvmers to the basic WE composition.
The following combinations of ALD and WE compositions have been tested.
3a. 4.5g ALD with 0.9Og WE 3b. 4.5g ALD with 0.78g basic WE composition and 0.06g CP1 and 0.06g CP2 3c. 4.5g ALD with 0.78g basic WE composition and 0.06g CP1 and O.Oβg CP3 3d. 4.5g ALD with 0.78g basic WE composition and 0.06g CP1 and 0.06g CP5 3e. 4.5g ALD with 0.78g basic WE composition and 0.06g CP2 and 0.06g CP3 3f. 4.5g ALD with 0.78g basic WE composition and 0.06g CP3 and 0.06g CP5 3g. 4.5g ALD with 0.78g basic WE composition and 0.04g CP1 , 0.04g CP2 and 0.04g CP3
Detailed test results
Test 1 -graying; Data relating to graying showing the effect of the use of WE com- positions in addition to ALD. detergent as described under number test cloth 1 a 1 b 1c 1 d
Cotton 0,0 -3,3 -3,2 0,2
Polyester-cotton 0,0 -1,7 0,4 0,0
Polyester 0,0 1 ,2 4,7 -0,6
Polyamide 0,0 0,8 2,4 -0,2
Terrycloth 0,0 -3,3 -3,3 -0,2 > n e, a i- er e m o.
-16-
Test 1 -whitening; Data relating to whiteness showing the effect of the use of WE composition in addition to ALD. detergent as described under number test cloth 1a 1b 1c 1d
Cotton 0,0 -18,7 -7,1 -0,4
Polyester-cotton 0,0 -15,5 1,4 0,5
Polyester O1O -0,1 5,8 -0,6
Polyamide 0,0 1,4 4,4 1.2
Terrycloth 0,0 -18,5 -10,4 -2,3
Test 1-ash residue; Data relating to the ash-residue showing the effect of the use of WE composition in addition to ALD.
Test 2-graying; Data relating to graying showing the effect of addition of (co-) polymer to the basic WE composition.
detergent as described under number test cloth 2a 2b 2c 2d 2e 2f 2q 2h 2ι
Cotton 0,0 -0,9 0,6 -0,1 0,5 0,1 0,5 0,3 0,2
Polyester-cotton 0,0 0,5 0,6 0,4 1,5 -0,3 1,2 -0,1 -0,1
Polyester 0,0 1,0 1.3 2,3 5,1 12,7 6,0 -0,8 -2,8
Polyamide 0,0 -0,3 -0,3 2,3 1,3 -2,8 0,8 -0,3 -0,6
Terrycloth 0,0 0,4 1,3 -0,1 -0,5 -1,9 0,1 0,7 -0,3
Test 2-whitening; Data relating to whiteness showing the effect of addition of (copolymer to the basic WE composition. detergent as described under number test cloth 2a 2b 2c 2d 2e 2f 2g 2h 2ι
Cotton 0,0 -1,4 2,5 0,0 1,7 -1,0 1,6 1,9 1,0
Polyester-cotton 0,0 2,8 0,9 0,5 2,7 1,6 2,2 1,2 0,6
Polyester 0,0 3,1 1,2 3,4 2,3 6,7 3,7 -3,7 -7,2
Polyamide 0,0 6,1 1,1 1,6 0,5 -2,3 -1,0 -1,2 0,3
Terrycloth 0,0 1,3 -1,5 -1,3 -0,8 -2,4 -1,1 2,8 1,4 Test 2-ash residue; Data relating to the ash-residue showing the effect of addition of (co-)polymer to the basic WE composition. detergent as described under number test cloth 2a 2b 2c 2d 2e 2f 2p 2h 2i
Cotton 1,20 1,15 1,15 1,35 1,25 1,20 1,10 1,10 1,10
Test 3-graying; Data relating to graying showing the effect of the addition of combinations of (co-)polymers to the basic WE composition.
detergent as described under number test cloth 3a 3b 3c 3d 3e 3f 3g
Cotton 0,0 0,8 0,9 0,8 1,0 1,1 0,6
Polyester-cotton 0,0 1,2 1,3 1,4 1,4 1,2 1,4
Polyester 0,0 3,4 3,9 4,9 3,5 4,3 3,7
Polyamide 0,0 2,0 0,7 0,2 0,5 1,9 1,2
Terrycloth 0,0 2,8 0,5 0,8 -0,8 -0,7 1,8
Test 3-whitening; Data relating to whiteness showing the effect of the addition of combinations of (co-)polymers to the basic WE composition.
detergent as described under number test cloth 3a 3b 3c 3d 3e 3f 3g
Cotton 0,0 2,4 1,6 1,4 -1,2 2,3 3,0
Polyester-cotton 0,0 4,0 2,1 1,9 2,0 2,9 4,1
Polyester 0,0 5,0 0,6 2,7 2,7 3,4 7,6
Polyamide 0,0 1,4 1,9 0,4 -0,3 2,8 5,7
Terrycloth 0,0 4,6 -1,5 -2,7 -1,9 -2,6 3,2
Test 3-ash residue; Data relating to the ash-residue showing the effect of the addition of combinations of (co-)polymers to the basic WE composition.
detergent as described under number test cloth 3a 3b 3c 3d 3e 3f 3g
Cotton 1,20 1,05 1,15 0,80 1,15 1,20 1,20
Conclusion
General conclusion with regard to Graving; - Adding WE composition to an ALD gives a positive effect on the graying of at least cotton and terrycloth test cloths.
- Raising the dosage of ALD has a positive effect on the graying of polyester.
- Adding (co-)polymers to a WE composition that is dosed in combination with an ALD results in a positive effect on graying of at least polyester.
- Adding combinations of (co-)polymers to a WE composition that is dosed in combination with an ALD results in a positive effect on graying in general.
General conclusion with regard to Whitening: - Adding WE composition to an ALD gives a positive effect on the whitening of at least cotton, polyester-cotton and terrycloth test cloths.
- Raising the dosage of ALD has a positive effect on the whitening of at least cotton, polyester-cotton, polyester, polyamide and terrycloth.
- Adding (co-)polymers to a WE composition that is dosed in combination with an ALD results in a positive effect on whitening of at least polyester and polyester- cotton test cloths.
- Adding combinations of (co-)polymers to a WE composition that is dosed in combination with an ALD results in a positive effect on whitening of the test cloths.
General conclusion with regard to Ash residue;
- Adding WE composition to an ALD lowers the amount of ash residue of the cotton test cloth.
- Raising the dosage of an ALD lowers the amount of ash residue of the cotton test cloth but however does not reach the level when WE composition is added. - Adding (co-)polymers or combinations thereof to the WE composition does not have any effect of the ash-residue of the cotton test cloth.

Claims

Claims
1. A composition as a soluble water softener composition or for the preparation of a soluble water softener or detergent composition comprising: a) one or more polycarboxylic acid homopolymer(s) or salt(s) thereof in an amount of 1 to 90 wt.-%, b) one or more low molecular polycarboxylic acid(s) or salt(s) thereof in an amount of 1 to 90 wt.-%, c) one or more copolymer(s) based on maleic acid or (meth)acrylic acid or salt(s) thereof in an amount of 0.1 to 25 wt.-%, wherein the one or more comonomer(s) is/are selected from the group comprising i. hydrophobic monomers, ii. hydrophobic monomers with hydrophilic groups, and iii. hydrophilic monomers with hydrophilic groups, or mixtures thereof.
2. The composition according to claim 1 , wherein the polycarboxylic acid ho- mopolymer(s) is/are selected from the group comprising polymers of acrylic acid, methacrylic acid, maleic acid and/or salts thereof
3. The composition according to any of the preceding claims, wherein the low molecular polycarboxylic acid is citric acid, lactic acid, malic acid, maleic acid, tartaric acid, agaric acid, trimellitic acid, succinic acid or a salt thereof.
4. The composition according to any of the preceding claims, wherein the hydrophobic monomer(s) of the maleic acid or (meth)acrylic acid based copolymers is/are selected from the group comprising (alpha)olefines, unsaturated cyclic hydrocarbons and aryl compounds.
5. The composition according to claim 4, wherein the hydrophobic monomer(s) are selected from the group comprising styrene, methyl styrene, 2-ethylhexyl acrylate, octylacrylate, lauryl acrylate, stearyl acrylate, behenyl acrylate, 2- ethylhexyl methacrylate, octylmethacrylate, lauryl methacrylate, stearyl methacrylate, behenyl methacrylate, 2-ethylhexyl acrylamide, octylacryla- mide, lauryl acrylamide, stearyl acrylamide, behenyl acrylamide, propyl acry- late, butyl acrylate, pentyl acrylate, hexyl acrylate, 1 -vinyl naphthalene, 2- vinyl naphthalene, 3-methyl styrene, 4-propyl styrene, t-butyl styrene, A- cyclohexyl styrene, 4-dodecyl styrene, 2-ethyl-4-benzyl styrene, A- (phenylbutyl) styrene, 1-propene, 2-propene, 1-butene, 2-butene, 1-pentene, 2-pentene, 1-hexene, 2-hexene, 3-hexene, 1-heptene, 2-heptene, 3-heptene, 1-octene, 2-octene, 3-octene, 4-octene, preferably styrene, methyl styrene or an olefin.
6. The composition according to any of the preceding claims, wherein the hy- drophilic group(s) of the monomer(s) of the maleic acid or (meth)acrylic acid based copolymers is/are selected from the group comprising the hydroxyl, carboxamide, amine, carboxylate, carboxyl, phosphate, phosphono, phosphino, phosphonate, sulfonyl or sulfo group.
7. The composition according to any of the preceding claims, wherein the hy- drophilic group(s) of the hydrophilic monomer(s) is/are selected from the group comprising (meth)allyl sulphonic acid, vinyl sulphonic acid, vinyl phos- phonic acid, dimethylacrylamide, dimethylaminopropylmethacrylate, diethyl- aminopropylmethacrylate, vinyl formamide, vinyl acetamide, vinyl pyrrolidone, vinyl imidazole, phenyl (meth)allyl ether sulfonic acid, 2-acrylamido-2-methyl propane sulfonic acid, sulphonated styrene, allyloxybenzene sulfonic acid, al- lyloxy-2-hydroxy propyl sulfonic acid, 2-acryloxypropionic acid and (meth)allyl phosphonic acid.
8. The composition according to any of the preceding claims, wherein the weight ratio of the polycarboxylic acid homopolymer(s) to the low molecular polycarboxylic acid(s) is 5:1 to 1 :10, preferably 3:1 to 1 :6.
9. The composition according to any of the preceding claims, wherein the weight ratio of the polycarboxylic acid homopolymer(s) to the (meth)acrylic acid based copolymer(s) is 20:1 to 1 :1 , preferably 8:1 to 2:1.
10. The composition according to any of the preceding claims, wherein the weight ratio of the low molecular polycarboxylic acid(s) to the (meth)acrylic acid based copolymers) is 30:1 to 1 :2, preferably 20:1 to 5:1.
11. The composition according to any of the preceding claims, further comprising one or more adjuvants and/or additives selected from the group comprising optical brighteners, bleaches, bleach activators, anti-lumping agents, dye transferring inhibitors, lubricating agents, anti-redeposition agents, soil release polymers, enzymes, rinsing aids, dyes, deodorising agents, antioxidants, perfumes, sulphates, (bi)carbonates, PEG and surfactants.
12. A co-granulate comprising the composition according to any of the preceding claims.
13. A co-granulate comprising the composition according to any of the claims 1 to 11 but being free of low molecular polycarboxylic acid(s).
14. A co-granulate comprising the composition according to any of the claims 1 to 11 but being free of polycarboxylic acid homopolymer(s).
15. A co-granulate comprising the composition according to any of the claims 1 to 11 but being free of maleic or (meth)acrylic acid based copolymer(s).
16. A co-granulate according to any of the claims 12 to 15, wherein the average particle size of the granulate is between 0.1 and 2.0 mm.
17. A soluble water softener composition or a detergent formulation comprising the composition and/or the co-granulate according to any of the preceding claims.
18. The detergent formulation according to claim 17, wherein the formulation is a laundry or automatic dishwashing detergent formulation.
19. A compressed tablet comprising the composition, the soluble water softener composition, the co-granulate and/or the detergent formulation according to any of the preceding claims.
20. The co-granulate, the soluble water softener composition, detergent formulation or tablet according to any of the preceding claims, wherein one or more of its components is/are in a crystalline, microcrystalline, amorphous or other solid form.
21. Use of the composition according to any of the claims 1 to 11 in a water soluble water softener composition or a detergent formulation.
22. Use of one or more maleic acid or (meth)acrylic acid based copolymer(s) in a water soluble water softener composition or a detergent formulation, wherein the respective comonomer(s) are those as defined in one of the claims 4 to 7.
23. Use of a co-granulate comprising one or more maleic acid or (meth)acrylic acid based copolymer(s) in a water soluble water softener composition or in a detergent formulation or for the preparation of a compressed tablet which can be used in a cleaning process, wherein the respective comonomer(s) are those as defined in one of the claims 4 to 7.
24. Use of a water softener composition as described in any of the preceding claims in combination with a laundry detergent composition containing a mixture of • a disodium distyrylbiphenyl disulfonate derivate and
• a bis-(triazinylamino)-stilbene disulfonic acid derivate as brighteners
25. Method for the preparation of a co-granulate according to any of the claims 12 to 16 comprising the steps of: a) optionally dissolving all compounds the co-granulate is prepared from, either individually or as a mixture of some or all compounds, in a solvens, preferably in water, b) optionally adjusting pH of the solution(s) to the desired level, c) if applicable blending the solutions, d) providing a homogenious solution comprising a polycarboxylic acid ho- mopolymer and/or a low molecular polycarboxylic acid and/or a maleic or (meth)acrylic acid based copolymer as optionally prepared according to steps a to c, e) optionally adjusting the pH to the desired level, f) drying the solution into the desired particle size, and g) if desired grinding the co-granulate into the desired particle size.
EP07847012A 2006-12-18 2007-12-06 Water softener composition Withdrawn EP2285746A1 (en)

Priority Applications (1)

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EP07847012A EP2285746A1 (en) 2006-12-18 2007-12-06 Water softener composition

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Application Number Priority Date Filing Date Title
EP06026190A EP1935852A1 (en) 2006-12-18 2006-12-18 Water softener composition
EP07847012A EP2285746A1 (en) 2006-12-18 2007-12-06 Water softener composition
PCT/EP2007/010586 WO2008074402A1 (en) 2006-12-18 2007-12-06 Water softener composition

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WO2008074402A1 (en) 2008-06-26

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