NZ267309A - Process for bleaching fabrics using an acetyl triethyl citrate composition as a pretreatment - Google Patents
Process for bleaching fabrics using an acetyl triethyl citrate composition as a pretreatmentInfo
- Publication number
- NZ267309A NZ267309A NZ267309A NZ26730994A NZ267309A NZ 267309 A NZ267309 A NZ 267309A NZ 267309 A NZ267309 A NZ 267309A NZ 26730994 A NZ26730994 A NZ 26730994A NZ 267309 A NZ267309 A NZ 267309A
- Authority
- NZ
- New Zealand
- Prior art keywords
- fabrics
- composition
- triethyl citrate
- liquid
- acetyl triethyl
- Prior art date
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
- C11D3/39—Organic or inorganic per-compounds
- C11D3/3902—Organic or inorganic per-compounds combined with specific additives
- C11D3/3905—Bleach activators or bleach catalysts
- C11D3/3907—Organic compounds
- C11D3/391—Oxygen-containing compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
- D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Detergent Compositions (AREA)
- Cosmetics (AREA)
Abstract
A process of bleaching fabrics is disclosed where a liquid or pasty pretreating composition comprising acetyl triethyl citrate is applied to fabrics before they are immersed in an aqueous wash liquor.
Description
New Zealand Paient Spedficaiion for Paient Number £67309
New Zealand No. 267309 International No.
TO BE ENTERED AFTER ACCEPTANCE AND PUBLICATION
Priority dates: 09.06.1993;
Complete Specification Filed: 24.05.1994
Classification^) D06L3/02.16
Publication date: 24 February 1998
Journal No.: 1425
NEW ZEALAND PATENTS ACT 1953
COMPLETE SPECIFICATION
Title of Invention:
Process for the bleaching of fabrics
Name, address and nationality of applicant(s) as in international application form:
THE PROCTER & GAMBLE COMPANY, One Procter & Gamble Plaza, Cincinnati, Ohio 45202, United States of America
New Zealand No. 267309 International No. PCT/US94/05817
MEW ZEALAND PATENTS ACT 1953 COMPLETE SPECIFICATION
Title of Invention:
Process for the bleaching of fabrics
Name, address and nationality of applicant(s) as in international application form:
THE PROCTER & GAMBLE CO, of One Procter & Gamble Plaza, Cincinnati, Ohio 45202, United States of America
26750 9
PCX /US94/05817
1
Process for the Bleaching of Fabrics
Technical Field
»
The present invention relates to the bleaching of fabrics and to pretreatment compositions for fabrics.
Background
The bleaching of fabrics is extensively discussed in the art. Various bleaching compositions have been designed for this purpose, which can be classified in two classes: peroxide bleaching compositions and hypochlorite bleaching compositions. Peroxide bleaching has the advantage over hypochlorite bleaching that it is generally regarded as safer to the color of fabrics and as non-yellowing on white fabrics.
A major drawback of peroxygen bleaches is that they are less active than chlorine bleaches at low temperatures which are often encountered in modern laundering operations. Thus peroxygen bleach activators have been developed which have been extensively addressed in the art. A particular class of peroxygen bleach activators is
2
constituted by peracid precursors which react with hydrogen peroxide to form peracids which are the activated bleaching species.
Treatments of fabrics before they are washed, often referred to as fabric pretreatments are also known in the art. In these pretreatments, an effective quantity of a given liquid or pasty composition is applied onto a portion of the fabrics, typically the heavily soiled portions, before the fabrics are washed in an aqueous wash liquor.
It has now been found that a particularly effective bleaching of fabrics can be achieved in connection with a pretreatment operation, provided a liquid or pasty composition is used which comprises acetyl triethyl citrate as a peracid precursor.
Acetyl triethyl citrate has been disclosed as a peracid precursor in the context of laundry bleaching in
PCT publication WO 93/11869.
Summary of the invention
The present invention is a process of bleaching fabrics which comprises the steps of applying on at least a portion of said fabrics an effective amount of a liquid or pasty composition comprising acetyl triethyl citrate, then washing said fabrics in an aqueous wash liquor, wherein an effective amount of hydrogen peroxide is provided either in said liquid or pasty composition, or in said wash—tiquorv
Detailed Description of the Inventior
!•-
,-rr
2 2 OCT 1997
RECEIVED
The present invention involves the use of a liquid or pasty composition comprising acetyl triethyl citrate. By liquid or pasty, it is meant herein a composition which can be
3
conveniently applied on fabrics before the fabrics are washed. Ideally, the compositions for use in the process of the present invention should not be so thick as to be difficult to apply on fabrics, or so thin as to compromise on the accuracy of the application on the fabrics. Accordingly, suitable compositions for us'e herein range from thin liquids to gels. Preferred compositions for use herein have a viscosity of from 50 cps to 10000 cps at 50 rpm at 20°c.
As an essential feature of the present invention, the compositions for use herein must comprise' an effective amount of acetyl triethyl citrate. Acetyl triethyl citrate is a known chemical which is commercially available for instance under the trade name Citroflex®, available from Morflex, but acetyl triethyl citrate.was only disclosed as a bleach activator for the first time in pct publication wo 93/11869. As discussed therein, acetyl triethyl citrate provides a wide variety of benefits, especially in the context of a liquid bleaching composition where it displays excellent storage stability, compared to the peracid precursors in the art. Furthermore, acetyl triethyl citrate has the peculiarity that it is a substantially water-insoluble liquid peracid precursor which perhydrolyses into a substantially water-soluble peracid. We have now found that this peculiarity makes it particularly advantageous to use acetyl triethjf the context of the present invention.
2 2 OCT 1997
Indeed, because it is a substantially water—insoJ
1
liquid peracid precursor, acetyl triethyl citrate tends to" affine onto the surface of fabrics and/or stains where it has been applied during the pretreatment operation instead of dissolving in the aqueous wash liquor in which the fabrics are washed, thus promoting surface bleaching instead of solution bleaching, i.e. the perhydrolysis of the acetyl triethyl citrate into peracetic acid occurs on
PCT/US94/Q5817
4
the surface of the fabrics and /or stains instead of in the wash liquor, increasing the overall efficiency of the bleaching process. Thus the affinity between the peracid precursor and the fabric, especially the soiled portions thereof, is maximized. Naturally, this effect is favored when synthetic fabrics are pretreated, as synthetic fabrics have a hydrophobic character.
Accordingly, in the context of the present invention, the bleaching of fabrics does not substantially occur during the pretreatment operation, but rather in the subsequent step where the pretreated fabrics are immersed in an aqueous wash liquor. In other words, the present invention lies not only in the use of acetyl triethyl citrate as a bleach activator4 but also in the use of acetyl triethyl citrate in a pretreatment operation, whereby the bleaching of fabrics is optimized in the subsequent step where the fabrics are immersed in an aqueous wash liquor. Accordingly, in its broadest aspect, the present invention encompasses the use of acetyl triethyl citrate for the manufacture of a liquid or pasty composition to be used in the pretreatment of fabrics.
Furthermore, acetyl triethyl citrate is perhydrolysed into peracetic acid which is a substantially water-soluble peracid. Thus the peracid generated promptly dissolves in the wash liquor. Also, triethyl citrate which is the second component produced in perhydrolysis of acetyl triethyl citrate is also water-soluble. Therefore it is another advantage of the present invention that the peracid generated is not permanently affined to the fabrics, and all pe.rhydrolysis reaction compounds are solubilized in the wash liquor. This benefit translates into an easy rinsing off of the peracid from the fabrics.
Furthermore still, we have found that acetyl triethyl citrate also acts as a substantially water-insoluble
solvent which dissolves the stains, thereby preparing and easing the subsequent cleaning of the fabrics in the subsequent step where said fabrics are immersed in said wash liquor. This constitutes another benefit of using acetyl triethyl citrate in the pretreatment mode according to the present invention.
Accordingly, the compositions for use herein comprise from 0.5% to 50% by weight of the total composition of acetyl triethyl citrate, preferably from 2% to 20%. As regards the amounts of ingredients in the present invention, the expression effective amount refers to amounts of acetyl triethyl citrate and hydrogen peroxide which will ensure the bleaching of fabrics.
In the process according to the present invention, it is essential that hydrogen peroxide be supplied so that acetyl triethyl citrate is perhydrolysed into peracetic acid. Hydrogen peroxide can be supplied either in the pretreatment composition, i.e. together with acetyl triethyl citrate, or in the wash liquor. Most conveniently, hydrogen peroxide is provided by the pretreatment composition. Also, it is to be understood that hydrogen peroxide can be supplied directly as hydrogen peroxide or indirectly, as sources of hydrogen peroxide such as perborate, percarbonate and the like. Accordingly, in a preferred embodiment of the present invention, the pretreatment compositions suitable for use herein comprise from 0.5% to 30% by weight of the total composition of hydrogen peroxide, preferably from 2% to 20%. In this preferred embodiment, and in order to ensure optimum chemical stability for the compositions herein, it is desirable to formulate pretreatment compositions in the mildly acidic range, from pH 1 to 6, preferably 3 to 5.'
In order to make best use of the pretreatment step in the process herein, the compositions suitable for use herein
6
may further comprise a variety of optional ingredients. Preferred optional ingredients include surfactants, such as described in the art, at a total level of from 4% to 85% by weight of the total composition, preferably from 8% to 60%. Preferred surfactants for use herein are anionic and nonionic surfactants, typically alkyl benzene sulphonates and fatty alcohol ethoxylates. Other suitable optional ingredients include builders, enzymes, soil release agents, dyes, opacifiers, perfumes and other minors.
As acetyl triethyl citrate is water-insoluble, it is particularly advantageous to formulate a composition comprising it in the form of an aqueous emulsion of at least two nonionic surfactants, a hydrophilic one and a hydrophobic one, having different HLB values, and the difference in HLB value is of at 'least 3. Nonionic surfactants with different HLBs can be conveniently chosen by selecting alkoxylated alcohols with varying degrees of alkoxylation. Such compositions typically comprise from 10% to 95% by weight of the total composition of water, preferably deionized, preferably from 60* to 80%. For optimum stability, and when the compositions comprise hydrogen peroxide, it is preferred to formulate at pH 0.5 to 6. These compositions, which have been described more extensively in EP publication No. 598,694, allow to formulate physically and chemically stable liquid compositions which may further comprise hyc
In the process according to the present inv^tQ£eJn19^id liquid or pasty composition comprising a c etyl—HLj. jj^Lhyl" citrate as described hereinbefore is applied on at-leas I d' portion of said fabrics, and said fabrics are subsequently immersed in an aqueous wash liquor. Indeed, it is essential that acetyl triethyl citrate is applied to the fabrics before said fabrics are immersed in an aqueous wash liquor so that acetyl triethyl citrate is affined in an optimum manner to fabrics.
7
The only critical aspect of the wash liquor herein is that it should provide an aqueous medium which has a pH of above 6. Indeed, such a pH is essential in order to trigger the perhydrolysis reaction. Optionally, but preferably, said wash liquor further comprises from 0.5g/l to 20g/l of common detersive ingredients which are well known in the art, including surfactants, builders, soil release agents, enzymes, bleaching components and the like. Suitable wash liquors are suitably provided by using conventional and commercially available laundry detergents in recommended dosage, either in hand wash or in machine wash. The present invention is not limited to either washing mode.
In a preferred ^embodiment of the present invention, the pretreatment composition is left on the fabrics for a certain period of time, typically about 2 min to 20 min before said fabrics are immersed in the wash liquor. Such an embodiment ensures that acetyl triethyl citrate is affined to fabrics in an optimum manner, and other ingredients in said pretreatment composition, if any, may perform as well.
Examples
The present composition is used as a pretreater which comprises the following ingredients in the following amount.
Example 1:
A following composition is used as a pretreater which comprises the listed ingredients in the listed proportions.
Dobanol 91-10@ Dobanol 23-2® Acetyl triethyl i
citrate
.0% 8.0% 6.0%
Claims (8)
1. A process of bleaching fabrics which comprises the steps of: -applying on at least a portion of said fabrics an effective amount of a liquid or pasty composition comprising acetyl triethyl citrate; and -then immersing said fabrics in an aqueous wash liquor; wherein an effective amount of hydrogen peroxide is provided either in said liquid or pasty composition or in said wash liquor.
2. A process according to claim 1 wherein said effective amount of hydrogen peroxide is provided by said composition.
3. A process according to any one of the preceding claims wherein said composition is applied to soiled portions of said fabrics.
4. A process according to <iny one of the preceding claims wherein said composition is applied to said fabrics about 2 min to 20 min before said fabrics are washed in said wash 1 "quor.
5. The use of acetyl triethyl citrate for the manufacture of a liquid or pasty fabric bleaching pretreatment composition to be used in the process according to any one of the preceding claims.
6. A process according to claim 1 and substantially as herein described with reference to any embodiment disclosed.
7. A liquid or pasty fabric bleaching pretreatment composition comprising acetyl triethyl citrate, wherein the composition has a pH in the range of from 0-5 to 6.
8. A liquid or pasty composition according to claim 7 further comprising a surfactant system of at least lnieHe8IR?^0Pfi{$perty surfactants having different HLB values. Office of NZ END OF CLAIMS - 7 JAN 1998 RECEIVED «7309
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP93870102A EP0629693B1 (en) | 1993-06-09 | 1993-06-09 | Process for the bleaching of fabrics |
PCT/US1994/005817 WO1994029509A1 (en) | 1993-06-09 | 1994-05-24 | Process for the bleaching of fabrics |
Publications (1)
Publication Number | Publication Date |
---|---|
NZ267309A true NZ267309A (en) | 1998-02-26 |
Family
ID=8215349
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NZ267309A NZ267309A (en) | 1993-06-09 | 1994-05-24 | Process for bleaching fabrics using an acetyl triethyl citrate composition as a pretreatment |
Country Status (13)
Country | Link |
---|---|
EP (1) | EP0629693B1 (en) |
JP (1) | JPH09500424A (en) |
CN (1) | CN1127018A (en) |
AT (1) | ATE169953T1 (en) |
AU (1) | AU694735B2 (en) |
BR (1) | BR9406769A (en) |
CA (1) | CA2164816A1 (en) |
CZ (1) | CZ325095A3 (en) |
DE (1) | DE69320462T2 (en) |
ES (1) | ES2121982T3 (en) |
MA (1) | MA23220A1 (en) |
NZ (1) | NZ267309A (en) |
WO (1) | WO1994029509A1 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0776966B1 (en) | 1995-12-02 | 2002-09-11 | The Procter & Gamble Company | Liquid bleaching compositions packaged in spray-type dispenser and a process for pretreating fabrics therewith |
ATE274045T1 (en) * | 1996-09-13 | 2004-09-15 | Procter & Gamble | PEROXYGEN BLEACH CONTAINING AMINOTRI(METHYLENEPHOSPHONIC ACID) (ATMP), FOR THE PRETREATMENT OF TISSUES |
EP1496104B1 (en) * | 2003-07-08 | 2008-05-07 | The Procter & Gamble Company | Liquid activator composition |
US8871807B2 (en) | 2008-03-28 | 2014-10-28 | Ecolab Usa Inc. | Detergents capable of cleaning, bleaching, sanitizing and/or disinfecting textiles including sulfoperoxycarboxylic acids |
US8809392B2 (en) | 2008-03-28 | 2014-08-19 | Ecolab Usa Inc. | Sulfoperoxycarboxylic acids, their preparation and methods of use as bleaching and antimicrobial agents |
BRPI0907918B1 (en) | 2008-03-28 | 2018-07-24 | Ecolab Inc. | SULFOPEROXIC CARBOXYLIC ACIDS, THEIR PREPARATION AND METHODS OF USE AS AN ANTIMICROBYANES |
US8877254B2 (en) | 2010-12-29 | 2014-11-04 | Ecolab Usa Inc. | In situ generation of peroxycarboxylic acids at alkaline pH, and methods of use thereof |
PL2687094T3 (en) | 2010-12-29 | 2018-09-28 | Ecolab Usa Inc. | Generation of peroxcarboxylic acids at alkaline pH, and their use as textile bleaching and antimicrobial agents |
US9321664B2 (en) | 2011-12-20 | 2016-04-26 | Ecolab Usa Inc. | Stable percarboxylic acid compositions and uses thereof |
US9926214B2 (en) | 2012-03-30 | 2018-03-27 | Ecolab Usa Inc. | Use of peracetic acid/hydrogen peroxide and peroxide-reducing agents for treatment of drilling fluids, frac fluids, flowback water and disposal water |
US8822719B1 (en) | 2013-03-05 | 2014-09-02 | Ecolab Usa Inc. | Peroxycarboxylic acid compositions suitable for inline optical or conductivity monitoring |
US10165774B2 (en) | 2013-03-05 | 2019-01-01 | Ecolab Usa Inc. | Defoamer useful in a peracid composition with anionic surfactants |
US20140256811A1 (en) | 2013-03-05 | 2014-09-11 | Ecolab Usa Inc. | Efficient stabilizer in controlling self accelerated decomposition temperature of peroxycarboxylic acid compositions with mineral acids |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3833721A (en) * | 1972-07-14 | 1974-09-03 | Gillette Co | Astringent compositions |
DE2418338B2 (en) * | 1974-04-16 | 1978-09-28 | Henkel Kgaa, 4000 Duesseldorf | Use of esters of citric acid and / or acetylcitric acid in anhydrous cosmetic preparations |
GB1589866A (en) * | 1976-08-20 | 1981-05-20 | Unilever Ltd | Detergent bars for personal washing |
US4412934A (en) * | 1982-06-30 | 1983-11-01 | The Procter & Gamble Company | Bleaching compositions |
US5194250A (en) * | 1988-06-25 | 1993-03-16 | Beecham Group P.L.C. | Compositions |
EP0359710B1 (en) * | 1988-09-16 | 1993-06-16 | Ciba-Geigy Ag | Optical brightening agents |
EP0396287A3 (en) * | 1989-05-04 | 1991-10-02 | The Clorox Company | Method and product for enhanced bleaching with in situ peracid formation |
DE69229957T2 (en) * | 1991-12-13 | 2000-04-13 | Procter & Gamble | ACYLATED CITRATE ESTERS AS SUBSTANCES FOR PERSONIC ACIDS |
TR27620A (en) * | 1991-12-13 | 1995-06-13 | Procter & Gamble | Encapsulation of liquids in micro-organisms. |
ATE163037T1 (en) * | 1992-11-16 | 1998-02-15 | Procter & Gamble | CLEANING AND BLEACHING COMPOSITIONS |
-
1993
- 1993-06-09 EP EP93870102A patent/EP0629693B1/en not_active Expired - Lifetime
- 1993-06-09 DE DE69320462T patent/DE69320462T2/en not_active Expired - Fee Related
- 1993-06-09 ES ES93870102T patent/ES2121982T3/en not_active Expired - Lifetime
- 1993-06-09 AT AT93870102T patent/ATE169953T1/en not_active IP Right Cessation
-
1994
- 1994-05-24 WO PCT/US1994/005817 patent/WO1994029509A1/en not_active Application Discontinuation
- 1994-05-24 CZ CZ953250A patent/CZ325095A3/en unknown
- 1994-05-24 BR BR9406769A patent/BR9406769A/en not_active Application Discontinuation
- 1994-05-24 CA CA002164816A patent/CA2164816A1/en not_active Abandoned
- 1994-05-24 JP JP7501843A patent/JPH09500424A/en active Pending
- 1994-05-24 NZ NZ267309A patent/NZ267309A/en unknown
- 1994-05-24 AU AU69566/94A patent/AU694735B2/en not_active Ceased
- 1994-05-24 CN CN94192731A patent/CN1127018A/en active Pending
- 1994-06-08 MA MA23533A patent/MA23220A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CA2164816A1 (en) | 1994-12-22 |
MA23220A1 (en) | 1994-12-31 |
ATE169953T1 (en) | 1998-09-15 |
CZ325095A3 (en) | 1996-03-13 |
ES2121982T3 (en) | 1998-12-16 |
AU694735B2 (en) | 1998-07-30 |
CN1127018A (en) | 1996-07-17 |
JPH09500424A (en) | 1997-01-14 |
BR9406769A (en) | 1995-02-27 |
AU6956694A (en) | 1995-01-03 |
WO1994029509A1 (en) | 1994-12-22 |
EP0629693B1 (en) | 1998-08-19 |
DE69320462T2 (en) | 1999-04-22 |
DE69320462D1 (en) | 1998-09-24 |
EP0629693A1 (en) | 1994-12-21 |
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