WO2003095599A1 - Process for removing a coloured food stain from plastic - Google Patents
Process for removing a coloured food stain from plastic Download PDFInfo
- Publication number
- WO2003095599A1 WO2003095599A1 PCT/GB2003/002004 GB0302004W WO03095599A1 WO 2003095599 A1 WO2003095599 A1 WO 2003095599A1 GB 0302004 W GB0302004 W GB 0302004W WO 03095599 A1 WO03095599 A1 WO 03095599A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plastic
- composition
- octadien
- dimethyl
- phenyl
- Prior art date
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 33
- 229920003023 plastic Polymers 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 235000013305 food Nutrition 0.000 title claims abstract description 21
- 239000000203 mixture Substances 0.000 claims abstract description 35
- WTEVQBCEXWBHNA-UHFFFAOYSA-N citral Chemical compound CC(C)=CCCC(C)=CC=O WTEVQBCEXWBHNA-UHFFFAOYSA-N 0.000 claims abstract description 13
- KJPRLNWUNMBNBZ-QPJJXVBHSA-N (E)-cinnamaldehyde Chemical compound O=C\C=C\C1=CC=CC=C1 KJPRLNWUNMBNBZ-QPJJXVBHSA-N 0.000 claims abstract description 10
- KJPRLNWUNMBNBZ-UHFFFAOYSA-N cinnamic aldehyde Natural products O=CC=CC1=CC=CC=C1 KJPRLNWUNMBNBZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 150000001299 aldehydes Chemical class 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 150000002576 ketones Chemical class 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 5
- 238000004851 dishwashing Methods 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 11
- 239000004615 ingredient Substances 0.000 description 8
- 239000007800 oxidant agent Substances 0.000 description 7
- 239000003599 detergent Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000004094 surface-active agent Substances 0.000 description 5
- 241000227653 Lycopersicon Species 0.000 description 4
- 235000007688 Lycopersicon esculentum Nutrition 0.000 description 4
- -1 alkanolamines Chemical class 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 102000004190 Enzymes Human genes 0.000 description 2
- 108090000790 Enzymes Proteins 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- 239000012933 diacyl peroxide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010794 food waste Substances 0.000 description 2
- 235000008960 ketchup Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 235000015067 sauces Nutrition 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001777 Tupperware Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000013011 aqueous formulation Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002304 perfume Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2072—Aldehydes-ketones
-
- 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
- C11D7/264—Aldehydes; Ketones; Acetals or ketals
-
- 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
- C11D2111/14—Hard surfaces
- C11D2111/18—Glass; Plastics
Definitions
- the present invention relates to a process of removing coloured food stains from plastic by treating the plastic a composition comprising 3-phenyl-2-propenal and/or 3,7- dimethyl-2,6-octadien-l-al.
- Automatic dishwashing processes have become well accepted by consumers as they save personal effort in the process of cleaning tableware.
- Automatic dishwashing detergents used for washing tableware (i.e. glassware, cliina, silverware, pots and pans, plasticware, etc.) in the home or institutionally in machines especially designed for the purpose have long been known.
- the particular requirements of cleaning tableware and leaving it in a sanitary, essentially spotless, residue-free state has resulted in so many particular ADD compositions that the body of art pertaining thereto is now recognised as quite distinct from other cleaning product art.
- a process for removing a coloured food stain from plastic comprising the steps of : a) contacting the substrate with a composition comprising 3-phenyl-2-propenal, 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms, and b) removing the composition from the plastic.
- Isomeric forms include the trans or cis foms, or a mixture thereof.
- an aqueous composition comprising: a) 3-phenyl-2-propehal and/or 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms; and b) an aldehyde or ketone having a hydrogen in the ⁇ -position.
- compositions of the present inventions it has been found to be desirable, in order to enhance the performance of the compositions, to adjust the pH in the alkaline range, namely between pH 8 and 11.
- compositions In the absence of an aldehyde or a ketone with hydrogen in the ⁇ -position the compositions have been found to work optimally when their pH is set in the range of 2 to 6.
- alkaline or acidic materials conventionally used in dishwashing detergents to adjust the pH of the compositions to the desired values.
- alkaline materials are alkaline hydroxides, alkanolamines, carbonates, and phosphates.
- acidic materials are hydrochloric acid, sulfamic acid, phosphoric acid and citric acid.
- compositions of the present invention may also advantageously comprise a surfactant to emulsify 3-phenyl-2- propenal and/or 3,7-dimethyl-2,6-octadien-l-al in the aqueous formulation.
- a surfactant to emulsify 3-phenyl-2- propenal and/or 3,7-dimethyl-2,6-octadien-l-al in the aqueous formulation.
- non- ionic surfactants with good emulsification behaviour such as those having an HLB (hydrophyllic-lypophyllic balance) comprised in the range from 8 to 18.
- HLB hydrophyllic-lypophyllic balance
- the surfactant is a low-foaming surfactant.
- an aqueous composition comprising: a) at least 0,5% of 3-phenyl-2-propenal and/or 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms; and b) an amount of surfactant sufficient to emulsify component (a).
- the composition of the present invention which is essentially intended to remove stains from plastic, can nevertheless provide additional benefits such as softening of dried-on or burnt-on food.
- the composition may contain other ingredients selected from the group comprising builders, solvents, enzymes and other conventional ingredients of normal, use in dishwashing compositions.
- plastic articles used as kitchenware are susceptible of being stained by coloured foods.
- Particular types of plastic frequently encountered in dishwashing processes are polypropylene and polyethylene.
- Particularly preferred plastics for treatment in accordance with this invention are those that are clear and uncoloured.
- a method for the evaluation of coloured food stain removal from plastic has been developed and is used to evaluate the results obtained with the process and compositions of the present invention and to compare them with the results obtained with conventional dishwashing processes.
- the evaluation method consist in the following steps:
- the reflectance (Ro) of the washed containers was measured with a spectrophotorheter (Mahlo ® color guide 45/0).
- TSRI tomato soil removal index
- Containers which had been stained with tomato, as described above were washed in a dishwasher (GE Quiet Power 3 ® ) using 45 g of Electrasol ® (a dishwashing detergent with a level of 0,6% sodium hypochlorite) for the prewash cycle and 60 g of Electrasol ® for the main wash cycle. Both the prewash and the main wash cycle were run with water at 55°C.
- GE Quiet Power 3 ® a dishwasher
- Electrasol ® a dishwashing detergent with a level of 0,6% sodium hypochlorite
- the TSRI was determined as explained above but without performing the step of treating the articles with the pretrater and it a value of 15 was obtained.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
The present invention relates to a process of removing coloured food stains from plastic by treating the plastic a composition comprising 3-phenyl-2-propenal and/or 3,7-dimethyl-2,6-octadien-1-al.
Description
ROCESS FOR REMOVING A COLOURED FOOD STAIN FROM PLASTIC
The present invention relates to a process of removing coloured food stains from plastic by treating the plastic a composition comprising 3-phenyl-2-propenal and/or 3,7- dimethyl-2,6-octadien-l-al.
The technology of cleaning tableware and leaving it in a sanitary, essentially spotless, residue-free state is a body of art recognised as quite distinct from other cleaning product art and the processes used therein can be classified in two main groups: manual dish cleaning processes where the consumer uses a cleaning product either neat or in diluted form and manually rubs tableware with the help of a rubbing device such as a sponge, a brush or a scouring pad followed by a rinsing step; and so-called automatic dishwashing processes where tableware is treated with cleaning products and auxiliary products such as rinse aids in a specially designed appliance (the dishwasher) whereby the task of manually rubbing is replaced by the mechanical action of circulating water within the appliance.
Automatic dishwashing processes have become well accepted by consumers as they save personal effort in the process of cleaning tableware. Automatic dishwashing detergents (ADD) used for washing tableware (i.e. glassware, cliina, silverware, pots and pans, plasticware, etc.) in the home or institutionally in machines especially designed for the purpose have long been known. The particular requirements of cleaning tableware and leaving it in a sanitary, essentially spotless, residue-free state has resulted in so many particular ADD compositions that the body of art pertaining thereto is now recognised as quite distinct from other cleaning product art.
There are however some areas where automatic dish-cleaning products still fail to deliver the perfect results that the users of such products have come to expect from them. One such area is the removal of cooked-, baked-, and burnt-on food residues.
As a possible solution to improve the cleaning results on cooked-, baked-, and burnt-on food residues it has been proposed to treat the tableware with special compositions in a separate step before it is actually cleaned in an automatic dishwashing process. One example of such a pre-treating composition is described in US 5,102,573.
There is still another area where automatic dishwashing processes fail to deliver a completely satisfactory result. This area is namely the cleaning of plastic, which have been stained by following contact with food. In effect, it has been observed that some coloured foods following prolonged contact with plastic can stain these surfaces. These stains are very stubborn and cannot be completely removed with conventional ADD products. Examples of plastics, which get stained by coloured food, are plastic containers for food (i.e. Tupperware® items), plastic dishes, plastic cooking implements (such as spatulas, spoons, sieves and colanders) and plastic elements of the dishwasher machine.
It has surprisingly been observed by the experts in the field that, although the food responsible for the staining are normally bleached effectively by strong oxidants in solution (i.e. sodium hypochlorite bleaches), once they have caused a stain in the plastic the stain is no longer bleachable with such oxidants.
Some solutions have been proposed in the art to improve the removal of food coloured stains from plastic in dishwashing machines. These solutions are based on the use of very strong oxidants. One example of such an oxidant is described in PCT application number 95/19132 Al where it is proposed to use diacyl or tefraacyl peroxides as bleaching species to enhance the removal of bleachable food soils from plastic substrates.
This solution presents however a number of drawbacks. One of the major drawbacks when using not only diacyl or tefraacyl peroxides but also other strong oxidants is the limited compatibility of these ingredients with bleach sensitive ingredients which are desirable in ADD formulations (i.e. enzymes, perfumes, etc.). As a consequence it is normally necessary to take special measures to assure the stability of the formulation comprising both the strong oxidants and the bleach sensitive ingredients. Examples of such measures are the segregation of the incompatible ingredients in different phases of the formulations (i.e. in different regions of a tablet), coating one of the ingredients or maintaining it in an isolated state (i.e. by insolubilisation in a liquid matrix) to reduce its interaction with the rest of the formulation.
Another drawback of using diacyl or tefraacyl peroxides (and also other strong oxidants) is their lack of stability at high temperatures, for which reason it has been proposed in WO 93/07086 that they are used in the form of their clathrates with urea or that they are formulated by forming particles with a stabilizing additive (EP 0 796 317 Bl).
Still another drawback of diacyl peroxides is in that when used in dishwashing processes at their conventional granulometry of 400 to 700 microns, a problem of residue formation occurs as reported by EP 0 821 722 Bl. According to this document the alternative of using diacyl peroxides of smaller particles size will generate segregation problems when incorporated into granular detergent compositions.
Due to the above mention difficulties an unmet need remains to find alternative solutions to improve the removal of coloured food stains from plastic.
The inventors have now surprisingly found that the above-mentioned objectives can be achieved when stained plastic is treated with compositions comprising 3-phenyl-2- propenal, and/or 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms.
According to one aspect of the present invention we present a process for removing a coloured food stain from plastic comprising the steps of : a) contacting the substrate with a composition comprising 3-phenyl-2-propenal, 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms, and b) removing the composition from the plastic.
Isomeric forms include the trans or cis foms, or a mixture thereof.
It has also been observed that although 3-phenyl-2-propenal and/or 3,7-dimethyl-2,6- octadien-1-al are in themselves able to deliver good performance in the removal of coloured stain from plastic substrates, the. addition of an aldehyde or a ketone having a hydrogen in the α-position increases their performance. Preferably the aldehyde/ketone has the formula C 1 -4alkyl-(C=O)-R, wherein R is H or C 1 -4alkyl.
According to a further aspect of the invention we presents an aqueous composition comprising: a) 3-phenyl-2-propehal and/or 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms; and b) an aldehyde or ketone having a hydrogen in the α-position.
Where an aldehyde or a ketone with hydrogen in their α-position is incorporated into the compositions of the present inventions it has been found to be desirable, in order to enhance the performance of the compositions, to adjust the pH in the alkaline range, namely between pH 8 and 11.
In the absence of an aldehyde or a ketone with hydrogen in the α-position the compositions have been found to work optimally when their pH is set in the range of 2 to 6.
In general it is possible to use any alkaline or acidic materials conventionally used in dishwashing detergents to adjust the pH of the compositions to the desired values. Examples of such alkaline materials are alkaline hydroxides, alkanolamines, carbonates, and phosphates. Examples of acidic materials are hydrochloric acid, sulfamic acid, phosphoric acid and citric acid.
In addition to the ingredients already described above the compositions of the present invention may also advantageously comprise a surfactant to emulsify 3-phenyl-2- propenal and/or 3,7-dimethyl-2,6-octadien-l-al in the aqueous formulation. Although any surfactant able to provide a stable emulsion is suitable, it is preferred to use non- ionic surfactants with good emulsification behaviour such as those having an HLB (hydrophyllic-lypophyllic balance) comprised in the range from 8 to 18. It is also preferred that the surfactant is a low-foaming surfactant.
According to a further feature we present an aqueous composition comprising: a) at least 0,5% of 3-phenyl-2-propenal and/or 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms; and b) an amount of surfactant sufficient to emulsify component (a).
Additionally it is contemplated that the composition of the present invention, which is essentially intended to remove stains from plastic, can nevertheless provide additional benefits such as softening of dried-on or burnt-on food. To this effect it is foreseen that the composition may contain other ingredients selected from the group comprising builders, solvents, enzymes and other conventional ingredients of normal, use in dishwashing compositions.
It has been observed that most plastic articles used as kitchenware are susceptible of being stained by coloured foods. Particular types of plastic frequently encountered in dishwashing processes are polypropylene and polyethylene. Particularly preferred plastics for treatment in accordance with this invention are those that are clear and uncoloured.
Although it has been observed that different types of food stains are susceptible of being at least partially removed from plastic by the process and the composition of the present invention, stains which are originated from foods derived from or comprising tomato are particularly well suited to be treated in accordance with this invention. Examples of such foods are; tomato sauce, ragu, ketchup and spaghetti sauce
Method of evaluation of coloured food stain removal:
A method for the evaluation of coloured food stain removal from plastic has been developed and is used to evaluate the results obtained with the process and compositions of the present invention and to compare them with the results obtained with conventional dishwashing processes.
The evaluation method consist in the following steps:
• Preparation of stained articles
• Treatment of the stained articles using the process of the invention
• Colorimetric assessment of the degree of stain removal.
Preparation of standard soiled plastic articles:
Commercially available plastic containers made of isotactic polypropylene, as offered in the US market by Curver-Rubbermaid®, where washed twice in a Bosch SGS5602 machine with water of 2° of German hardness at 55 °C using a Calgonit Powerball® tablet dishwashing detergent.
The reflectance (Ro) of the washed containers was measured with a spectrophotorheter (Mahlo® color guide 45/0).
The same containers were subsequently washed twice in the same dishwasher and under identical conditions but replacing the detergent by 50 g. of Ketchup (Rantomato®) and the reflectance of the soiled containers (R-) was measured again with the same apparatus.
Method of soil removal using a pretreater:
To a plastic container stained as explained above, which was standing in up-right position, 50 ml of a pretreater composition were added and the container was placed in a dark environment for 10 minutes. The container was then emptied and rinse with tap water having a temperature of 20°C and a water hardness of 18° German hardness during 1 minute. The container was subsequently dried in an oven at 50°C during 20 minutes and then the reflectance (Rf) of the base of the container was determined using a spectrophotometer (Mahlo® color guide 45/0).
The parameter TSRI (tomato soil removal index) was calculated using the following formula:
TSRI= R° ?^ *100 Ro-Ri
Obviously a perfect stain removal is characterised by a treated article having a reflectance as high as that of the unstained original article and thus a TSRI of 100. An article were no stain removal would have been achieved would show a reflectance identical to that of the soiled container and thus a TSRI of 0.
Examples:
Comparative example 1:
Containers, which had been stained with tomato, as described above were washed in a dishwasher (GE Quiet Power 3 ®) using 45 g of Electrasol® (a dishwashing detergent with a level of 0,6% sodium hypochlorite) for the prewash cycle and 60 g of Electrasol® for the main wash cycle. Both the prewash and the main wash cycle were run with water at 55°C.
The TSRI was determined as explained above but without performing the step of treating the articles with the pretrater and it a value of 15 was obtained.
Examples 2 to 5:
Claims
1. Process for removing a coloured food stain from plastic comprising the steps of: a) contacting the substrate with a composition comprising 3-phenyl-2-propenal, and/or 3,7-dimethyl-2,6-octadien-l-al in any of their isomeric forms, and b) removing the composition from the plastic.
2. Process according to claim 1 characterised in that after the start of step (a) and before the start of step (b) there is time delay of from 5 seconds to 48 hours, preferably from 5 seconds to 2 hours, most preferably from 10 seconds to 15 minutes.
3. Process according to any preceding claim . characterised in that the composition comprising 3-phenyl-2-propenal and/or 3,7-dimethyl-2,6-octadien-l-al is an aqueous composition having a pH between 8 and 11 and additionally comprising an aldehyde or ketone having a hydrogen in the α-position.
4. Process according to claims 1 or 2 characterised in that the composition comprising 3-phenyl-2-propenal and/or 3,7-dimethyl-2,6-octadien-l-al is an aqueous composition having a pH between 2 and 6.
5. Process according to any preceding claim characterised in that the composition is absorbed on a carrier, which is used as a means to contact the composition with the plastic substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003229999A AU2003229999A1 (en) | 2002-05-11 | 2003-05-09 | Process for removing a coloured food stain from plastic |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0210850.4 | 2002-05-11 | ||
| GB0210850A GB2388375A (en) | 2002-05-11 | 2002-05-11 | Process for removing stains from plastics substrates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003095599A1 true WO2003095599A1 (en) | 2003-11-20 |
Family
ID=9936520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/GB2003/002004 WO2003095599A1 (en) | 2002-05-11 | 2003-05-09 | Process for removing a coloured food stain from plastic |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU2003229999A1 (en) |
| GB (1) | GB2388375A (en) |
| WO (1) | WO2003095599A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7871974B2 (en) | 2006-04-20 | 2011-01-18 | The Procter & Gamble Company | Process for making bleach particles |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997034987A1 (en) * | 1996-03-19 | 1997-09-25 | The Procter & Gamble Company | Built automatic dishwashing compositions comprising blooming perfume |
| EP1146111A1 (en) * | 2000-04-14 | 2001-10-17 | The Procter & Gamble Company | Process of disinfecting a hard-surface with a composition comprising cinnamon oil and/or an active thereof |
| WO2001096516A1 (en) * | 2000-06-14 | 2001-12-20 | The Procter & Gamble Company | Process for cleaning a surface |
| US6362149B1 (en) * | 2000-08-03 | 2002-03-26 | Ecolab Inc. | Plastics compatible detergent composition and method of cleaning plastics comprising reverse polyoxyalkylene block co-polymer |
| US20020037817A1 (en) * | 2000-07-19 | 2002-03-28 | The Procter & Gamble Company | Cleaning composition |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4248642A (en) * | 1979-03-08 | 1981-02-03 | Kiyasu John Y | Wash cycle process |
| US4477361A (en) * | 1983-02-22 | 1984-10-16 | Sperti Drug Products, Inc. | Antifungal-antibacterial detergents containing cinnamic compounds |
| WO2000036064A1 (en) * | 1998-12-16 | 2000-06-22 | Unilever Plc | Bleaching compositions based on air oxidation of aromatic aldehydes at specific ph range |
-
2002
- 2002-05-11 GB GB0210850A patent/GB2388375A/en not_active Withdrawn
-
2003
- 2003-05-09 AU AU2003229999A patent/AU2003229999A1/en not_active Abandoned
- 2003-05-09 WO PCT/GB2003/002004 patent/WO2003095599A1/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997034987A1 (en) * | 1996-03-19 | 1997-09-25 | The Procter & Gamble Company | Built automatic dishwashing compositions comprising blooming perfume |
| EP1146111A1 (en) * | 2000-04-14 | 2001-10-17 | The Procter & Gamble Company | Process of disinfecting a hard-surface with a composition comprising cinnamon oil and/or an active thereof |
| WO2001096516A1 (en) * | 2000-06-14 | 2001-12-20 | The Procter & Gamble Company | Process for cleaning a surface |
| US20020037817A1 (en) * | 2000-07-19 | 2002-03-28 | The Procter & Gamble Company | Cleaning composition |
| US6362149B1 (en) * | 2000-08-03 | 2002-03-26 | Ecolab Inc. | Plastics compatible detergent composition and method of cleaning plastics comprising reverse polyoxyalkylene block co-polymer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7871974B2 (en) | 2006-04-20 | 2011-01-18 | The Procter & Gamble Company | Process for making bleach particles |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0210850D0 (en) | 2002-06-19 |
| AU2003229999A1 (en) | 2003-11-11 |
| GB2388375A (en) | 2003-11-12 |
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