WO2001044431A1 - Process and composition for laundering of textile fabrics - Google Patents

Process and composition for laundering of textile fabrics Download PDF

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Publication number
WO2001044431A1
WO2001044431A1 PCT/EP2000/011564 EP0011564W WO0144431A1 WO 2001044431 A1 WO2001044431 A1 WO 2001044431A1 EP 0011564 W EP0011564 W EP 0011564W WO 0144431 A1 WO0144431 A1 WO 0144431A1
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WO
WIPO (PCT)
Prior art keywords
composition
detergency builder
rinse
alkali metal
surfactant
Prior art date
Application number
PCT/EP2000/011564
Other languages
French (fr)
Inventor
Nigel Peter Bird
Ian Howell
William Frederick Soutar Neillie
Girish Rao
Graham Walker
Original Assignee
Unilever Plc
Unilever Nv
Hindustan Lever Limited
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 Unilever Plc, Unilever Nv, Hindustan Lever Limited filed Critical Unilever Plc
Priority to BR0016205-1A priority Critical patent/BR0016205A/en
Priority to AU26670/01A priority patent/AU2667001A/en
Publication of WO2001044431A1 publication Critical patent/WO2001044431A1/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/14—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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/12—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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/16—Phosphates including polyphosphates
    • 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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/265—Carboxylic acids or salts thereof
    • 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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • C11D7/3245—Aminoacids
    • 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
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/12—Soft surfaces, e.g. textile

Definitions

  • the present invention relates to a process and composition for the laundering of textile fabrics.
  • the present invention provides a process for the laundering of textile fabrics, which comprises:
  • a wash step in which the fabrics are immersed in an aqueous wash liquor comprising a detergent surfactant, a detergency builder and optionally other detergent ingredients; and (ii) a rinse step in which the fabrics are immersed for at least 30 seconds in an aqueous rinse liquor substantially free of surfactant and comprising a detergency builder in a concentration within the range of from 0.1 to 10 g/l.
  • a second aspect of the present invention provides a composition for treating laundered textile fabrics in the rinse, which comprises:
  • (b) from 0 to 90 wt%, preferably from 0 to 85 wt%, more preferably from 0 to 80 wt%, still more preferably from 0 to 50 wt% of a pH buffer, the weight ratio of (a) to (b) being from 99.9:0 to 10:90, preferably from 99:0 to 15:85, more preferably from 95:0 to 20:80; and
  • the process of the present invention is basically characterised by inclusion in the rinse liquor of a detergency builder in a concentration range of from 0.1-10g/l.
  • This rinse liquor must be substantially free of surfactants.
  • the rinse liquor should contain ⁇ 0.25g/l, more preferably ⁇ 0.1g/l and most preferably ⁇ 0.05g/l of non-soap synthetic surfactant. It is especially preferred for it to be completely devoid of such surfactant.
  • the rinse liquor may be substantially free of soap also.
  • the concentration of the detergency builder is from 0.5-5 g/l.
  • a wide range of water-soluble builders is available for use in the process of the present invention. They may be water-soluble, water insoluble or partially soluble. One or more such builders can be used. However, most preferred is sodium tripolyphosphate.
  • Other possible water-soluble detergency builders for this process are the alkali metal citrates, alkali metal carbonates (with calcite) as well as sodium nitrilot acetate (NTA). Aluminosiiicates are typical insoluble builders.
  • the builder is preferably in an amount to yield a pCa > 4, preferably > 5.
  • the optional pH buffer (b) is present at from 0 to 90 wt%, preferably from 0 to 85 wt%, more preferably from 0 to 80 wt%, especially from 0 to 50 wt% based on the weight of the composition according to the second aspect of the invention.
  • the pH buffer is present, preferably the level is at least 2 wt%.
  • the rinse liquor it is greatly preferred that the rinse liquor to have a pH > 8.0.
  • a specific alkaline buffering agent which is a non-builder or semi-detergency builder, for example, an alkali metal carbonate (without calcite) and/or bicarbonate and/or silicate.
  • a preferred embodiment comprises use of sodium tripolyphosphate as the builder, buffered to a pH greater than 8.0 in the rinse liquor with an agent selected from the alkaline metal carbonates (without calcites), orthophosphates, bicarbonates and/or silicates.
  • the detergency builder comprises, or is mainly, or solely consists of a citrate and/or NTA and/or aluminosiiicates, it is only necessary to buffer to a pH of > 5.5.
  • fluorescers for example selected from fluorescers, perfumes, starches, enzymes, (e.g. lipases), soil-release polymers, photobleaches and blueing agents.
  • fluorescer and/or perfume is mandatory.
  • anti-foam for products to be dosed in a final rinse, it is highly preferred to include anti-foam.
  • a clay for example of type bentonite, for example also having a number average particle size not exceeding 2.0 ⁇ m. This can also assist in stain removal.
  • the rinse liquor may be dosed with a composition according to the present invention in any suitable form, for example as a liquid, paste, gel, bar, tablet or granular product.
  • the artificial soil dispersion used in this wash-resoil procedure was produced according to the following procedure.
  • An artificial sebum composition comprising:-
  • the artificial sebum composition was dispersed in water with carbon and iron oxide, using clay as a dispersant. 1. Wash Conditions

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Detergent Compositions (AREA)

Abstract

A process for the laundering of textile fabrics, which comprises: (i) a wash step in which the fabrics are immersed in an aqueous wash liquor comprising a detergent surfactant, a detergency builder and optionally other detergent ingredients, (ii) a rinse step in which the fabrics are immersed for at least 30 seconds in an aqueous rinse liquor free of surfactant and comprising a detergency builder in a concentration within the range of from 0.1 to 10 g/l. A composition suitable for carrying out this process comprises: (a) from 10 to 99.95 wt.% of a detergency builder, (b) from 0 to 90 wt.% of a pH buffer, the ratio of (a) to (b) being from 99.95:0 to 10:90; and (c) a fluorescer and/or a perfume; the composition being substantially free of organic surfactant.

Description

PROCESS AND COMPOSITION FOR LAUNDERING OF TEXTILE FABRICS
Field of the Invention
The present invention relates to a process and composition for the laundering of textile fabrics.
Background of the Invention
In countries where textile fabrics are habitually washed by hand, even using premium laundry cleaning products, the degree of cleaning achieved is frequently disappointing.
One obvious route to improving handwash performance, is to try to improve the ingredients in the main wash detergent formulation. However, the inventors have now realised that this technical problem can be addressed by a novel and surprising process, whereby the fabrics are subjected to a detergency builder in the rinse. As well as improving overall cleaning/soil removal, in some cases this can also assist stain removal.
Definition of the Invention
The present invention provides a process for the laundering of textile fabrics, which comprises:
(i) a wash step in which the fabrics are immersed in an aqueous wash liquor comprising a detergent surfactant, a detergency builder and optionally other detergent ingredients; and (ii) a rinse step in which the fabrics are immersed for at least 30 seconds in an aqueous rinse liquor substantially free of surfactant and comprising a detergency builder in a concentration within the range of from 0.1 to 10 g/l.
A second aspect of the present invention provides a composition for treating laundered textile fabrics in the rinse, which comprises:
(a) from 10 to 99.95 wt%, preferably from 15 to 99.0 wt%, more preferably from 20 to 95 wt% of a water-soluble detergency builder;
(b) from 0 to 90 wt%, preferably from 0 to 85 wt%, more preferably from 0 to 80 wt%, still more preferably from 0 to 50 wt% of a pH buffer, the weight ratio of (a) to (b) being from 99.9:0 to 10:90, preferably from 99:0 to 15:85, more preferably from 95:0 to 20:80; and
(c) a fluorescer and/or a perfume, the composition being substantially free of organic surfactant.
Detailed Description of the Invention
The process of the present invention is basically characterised by inclusion in the rinse liquor of a detergency builder in a concentration range of from 0.1-10g/l. This rinse liquor must be substantially free of surfactants. For example, the rinse liquor should contain <0.25g/l, more preferably <0.1g/l and most preferably <0.05g/l of non-soap synthetic surfactant. It is especially preferred for it to be completely devoid of such surfactant. The rinse liquor may be substantially free of soap also.
The Detergency Builder in the Rinse
Preferably, the concentration of the detergency builder is from 0.5-5 g/l.
A wide range of water-soluble builders is available for use in the process of the present invention. They may be water-soluble, water insoluble or partially soluble. One or more such builders can be used. However, most preferred is sodium tripolyphosphate. Other possible water-soluble detergency builders for this process are the alkali metal citrates, alkali metal carbonates (with calcite) as well as sodium nitrilot acetate (NTA). Aluminosiiicates are typical insoluble builders.
The builder is preferably in an amount to yield a pCa > 4, preferably > 5.
The Buffer
The optional pH buffer (b) is present at from 0 to 90 wt%, preferably from 0 to 85 wt%, more preferably from 0 to 80 wt%, especially from 0 to 50 wt% based on the weight of the composition according to the second aspect of the invention. When the pH buffer is present, preferably the level is at least 2 wt%.
It is greatly preferred that the rinse liquor to have a pH > 8.0. To this end, if the builder itself is not sufficiently alkaline it is possible to add a specific alkaline buffering agent and/or use a buffering agent which is a non-builder or semi-detergency builder, for example, an alkali metal carbonate (without calcite) and/or bicarbonate and/or silicate. Thus, a preferred embodiment comprises use of sodium tripolyphosphate as the builder, buffered to a pH greater than 8.0 in the rinse liquor with an agent selected from the alkaline metal carbonates (without calcites), orthophosphates, bicarbonates and/or silicates. If, however, the detergency builder comprises, or is mainly, or solely consists of a citrate and/or NTA and/or aluminosiiicates, it is only necessary to buffer to a pH of > 5.5.
Other Optional Ingredients
It is also preferred to include one or other optional ingredient for example selected from fluorescers, perfumes, starches, enzymes, (e.g. lipases), soil-release polymers, photobleaches and blueing agents. In the case of compositions according to the invention, fluorescer and/or perfume is mandatory. For products to be dosed in a final rinse, it is highly preferred to include anti-foam. Additionally or alternatively to the foregoing, it is also possible to include a clay, for example of type bentonite, for example also having a number average particle size not exceeding 2.0 μm. This can also assist in stain removal.
Product Form
The rinse liquor may be dosed with a composition according to the present invention in any suitable form, for example as a liquid, paste, gel, bar, tablet or granular product.
The present invention will now be illustrated in more detail by way of the following non- limiting examples.
RINSE FORMULATIONS COMPOSITION A
Figure imgf000005_0001
Figure imgf000005_0002
Figure imgf000006_0001
All main-washes and rinses were carried out in 24°FH (2:1 Ca:Mg) water.
EXPERIMENTAL METHODOLOGY
The artificial soil dispersion used in this wash-resoil procedure was produced according to the following procedure.
Artificial Sebum Composition.
An artificial sebum composition comprising:-
Fatty Acids Tripalmitin Brominated Olive oil Squalene Cholesterol Cetostearylstearate
Artificial Soil Composition.
The artificial sebum composition was dispersed in water with carbon and iron oxide, using clay as a dispersant. 1. Wash Conditions
Figure imgf000007_0001
The rinse step was repeated 3 times, with the product being dosed in the first or last rinse, as appropriate. REFLECTANCE DATA COMPARISON TO INITIAL REFLECTANCE AND TO CONTROL PRODUCT AFTER 3 WASH-RESOIL CYCLES
RESULTS ON WOVEN COTTON.
Figure imgf000008_0001
RESULTS ON WOVEN POLYESTER/COTTON.
Figure imgf000009_0001
RESULTS ON KNITTED POLYESTER.
Figure imgf000010_0001

Claims

CLAIMS:
1. A process for the laundering of textile fabrics, which comprises:
(i) a wash step in which the fabrics are immersed in an aqueous wash liquor comprising a detergent surfactant, a detergency builder and optionally other detergent ingredients; and
(ii) a rinse step in which the fabrics are immersed for at least 30 seconds in an aqueous rinse liquor substantially free of surfactant and comprising a detergency builder in a concentration within the range of from 0.1 to 10 g/l.
2. A process as claimed in claim 1 , wherein the concentration of the detergency builder in the rinse liquor is within the range of from 0.25 to 5 g/l.
3. A process according to either preceding claim wherein the detergency builder in step (ii) comprises a water-soluble builder.
4. A process as claimed in any preceding claim, wherein the detergency builder is selected from alkali metal sodium tripolyphosphates, alkali metal citrates, orthophosphates, alkali metal carbonates, aluminosiiicates, and alkali metal nitrilotriacetates, and mixtures thereof.
5. A process as claimed in any preceding claim, wherein the rinse liquor further comprises a pH buffer.
6. A process as claimed in any of claims 3-5, wherein the water-soluble builder selected from tripolyphosphates, imino disuccinates and mixtures thereof, and the rinse liquor is buffered to a pH greater than 8.0 with a buffer selected from one or more of alkali metal carbonates (without calcite), bicarbonates and silicates.
7. A process according to claim 3 or claim 4, wherein the water-soluble detergency builder comprises a citrate or nitri I otri acetate and the rinse liquor is buffered to a pH > 5.5 with a buffer selected from one or more of alkali metal carbonates(without calcite), orthophosphates, bicarbonates and silicates.
8. A process as claimed in any preceding claim, wherein the rinse liquor also comprises a benefit agent selected from fluorescers, perfumes, starch, lipase, soil release polymers, photobleaches and blueing agents.
9. A process as claimed in any preceding claim, wherein the rinse liquor also comprises a clay.
10. A composition for treating laundered textile fabrics in the rinse, which comprises:
(a) from 10 to 99.95 wt%, preferably from 15 to 99.0 wt%, more preferably from 20 to 95 wt% of a water-soluble detergency builder;
(b) from 0 to 90 wt%, preferably from 0 to 85 wt%, more preferably from 0 to 80 wt%, still more preferably from 0 to 50 wt% of a pH buffer, the weight ratio of (a) to (b) being from 99.9:0 to 10:90, preferably from 99:0 to 15:85, more preferably from 95:0 to 20:80; and
(c) a fluorescer and/or a perfume, the composition being substantially free of organic surfactant. the composition being substantially free of organic surfactant.
11. A composition as claimed in claim 10, which further comprises an effective amount of a benefit agent selected from starch, lipase, soil release polymers, photobleaches and blueing agents.
12. A composition as claimed in claim 10 or claim 11 , which is in the form of a powder composition, granulated, a liquid, a paste, a gel, a bar or a tablet.
13. A laundry detergent product which comprises:
(i) a first composition which comprises a detergent surfactant, a detergency builder and optionally other detergent ingredients,
(ii) a second composition which is as claimed in any one of claims 10 to 12.
14. A product as claimed in claim 13, wherein the first composition (i) is a particulate laundry detergent composition.
15. A product as claimed in claim 13 or claim 14, wherein the first and second compositions are within separate primary packaging, and packed together within common secondary packaging.
PCT/EP2000/011564 1999-12-16 2000-11-17 Process and composition for laundering of textile fabrics WO2001044431A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR0016205-1A BR0016205A (en) 1999-12-16 2000-11-17 Process for washing textile fabrics, composition for the treatment of textile fabrics washed in rinsing, and detergent product for washing clothes
AU26670/01A AU2667001A (en) 1999-12-16 2000-11-17 Process and composition for laundering of textile fabrics

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9929833.3 1999-12-16
GBGB9929833.3A GB9929833D0 (en) 1999-12-16 1999-12-16 Process and composition for laundering textile fabrics

Publications (1)

Publication Number Publication Date
WO2001044431A1 true WO2001044431A1 (en) 2001-06-21

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CN (1) CN1214100C (en)
AU (1) AU2667001A (en)
BR (1) BR0016205A (en)
GB (1) GB9929833D0 (en)
WO (1) WO2001044431A1 (en)
ZA (1) ZA200203695B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2636727A1 (en) * 2012-03-08 2013-09-11 The Procter and Gamble Company Washing method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0418071D0 (en) * 2004-08-05 2004-09-15 Unilever Plc Fabric conditioning compositions
EP3805346B1 (en) * 2019-10-08 2024-08-14 The Procter & Gamble Company A method of laundering fabric

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB954736A (en) * 1962-02-09 1964-04-08 Colgate Palmolive Co Bleaching composition and process
US4110075A (en) * 1975-12-04 1978-08-29 Bosch-Siemens Hausgerate Gmbh Process for washing textiles in an automatic washing machine, working substances and apparatus for its performance
US5342535A (en) * 1991-08-21 1994-08-30 Imaginative Research Associates Inc. Compositions containing kurroll's salt
DE19631596A1 (en) * 1996-08-05 1998-02-12 Henkel Kgaa Washing process
WO1998046714A1 (en) * 1997-04-14 1998-10-22 The Procter & Gamble Company Detergent particle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB954736A (en) * 1962-02-09 1964-04-08 Colgate Palmolive Co Bleaching composition and process
US4110075A (en) * 1975-12-04 1978-08-29 Bosch-Siemens Hausgerate Gmbh Process for washing textiles in an automatic washing machine, working substances and apparatus for its performance
US5342535A (en) * 1991-08-21 1994-08-30 Imaginative Research Associates Inc. Compositions containing kurroll's salt
DE19631596A1 (en) * 1996-08-05 1998-02-12 Henkel Kgaa Washing process
WO1998046714A1 (en) * 1997-04-14 1998-10-22 The Procter & Gamble Company Detergent particle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2636727A1 (en) * 2012-03-08 2013-09-11 The Procter and Gamble Company Washing method
WO2013134168A1 (en) * 2012-03-08 2013-09-12 The Procter & Gamble Company Washing method

Also Published As

Publication number Publication date
ZA200203695B (en) 2003-06-05
CN1214100C (en) 2005-08-10
BR0016205A (en) 2002-08-13
CN1409754A (en) 2003-04-09
GB9929833D0 (en) 2000-02-09
AU2667001A (en) 2001-06-25

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