WO2000008124A1 - Highly alkaline warewashing detergent and method of manufacture thereof - Google Patents
Highly alkaline warewashing detergent and method of manufacture thereof Download PDFInfo
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- WO2000008124A1 WO2000008124A1 PCT/EP1999/005361 EP9905361W WO0008124A1 WO 2000008124 A1 WO2000008124 A1 WO 2000008124A1 EP 9905361 W EP9905361 W EP 9905361W WO 0008124 A1 WO0008124 A1 WO 0008124A1
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- WIPO (PCT)
- Prior art keywords
- warewashing
- composition according
- sequestrant
- nonionic surfactant
- making
- Prior art date
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- 239000003599 detergent Substances 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 19
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 71
- 239000003352 sequestering agent Substances 0.000 claims abstract description 39
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 20
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 8
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 7
- 239000010452 phosphate Substances 0.000 claims abstract description 7
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 229920000388 Polyphosphate Polymers 0.000 claims description 7
- -1 polyoxyethylene Polymers 0.000 claims description 7
- 239000001205 polyphosphate Substances 0.000 claims description 7
- 235000011176 polyphosphates Nutrition 0.000 claims description 7
- RYCLIXPGLDDLTM-UHFFFAOYSA-J tetrapotassium;phosphonato phosphate Chemical compound [K+].[K+].[K+].[K+].[O-]P([O-])(=O)OP([O-])([O-])=O RYCLIXPGLDDLTM-UHFFFAOYSA-J 0.000 claims description 4
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- 229920000193 polymethacrylate Polymers 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 3
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 3
- 229920001400 block copolymer Polymers 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 239000007788 liquid Substances 0.000 description 15
- 239000007787 solid Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 6
- 235000011121 sodium hydroxide Nutrition 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 235000008504 concentrate Nutrition 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 238000000265 homogenisation Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 229920002125 Sokalan® Polymers 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000013522 chelant Substances 0.000 description 3
- 238000005191 phase separation Methods 0.000 description 3
- 229920001983 poloxamer Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- HJMZMZRCABDKKV-UHFFFAOYSA-N carbonocyanidic acid Chemical compound OC(=O)C#N HJMZMZRCABDKKV-UHFFFAOYSA-N 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 229960001484 edetic acid Drugs 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical class C(C)(=O)* 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 235000014666 liquid concentrate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229940037179 potassium ion Drugs 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 229940093916 potassium phosphate Drugs 0.000 description 1
- 229910000160 potassium phosphate Inorganic materials 0.000 description 1
- 235000011009 potassium phosphates Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000019818 tetrasodium diphosphate Nutrition 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
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/044—Hydroxides or bases
-
- 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
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/66—Non-ionic compounds
- C11D1/722—Ethers of polyoxyalkylene glycols having mixed oxyalkylene groups; Polyalkoxylated fatty alcohols or polyalkoxylated alkylaryl alcohols with mixed oxyalkylele groups
-
- 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
- C11D11/00—Special methods for preparing compositions containing mixtures of detergents
- C11D11/0082—Special 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
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/04—Water-soluble compounds
- C11D3/06—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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular 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
Definitions
- the present invention provides a highly alkaline, homogenizable (i.e., homogenizable by mixing in a mill or in-line dynamic mixer) , warewashing composition.
- a highly alkaline homogenized warewashing detergent or composition which, generally, comprises of: (a) a source of alkalinity;
Landscapes
- 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)
- Detergent Compositions (AREA)
Abstract
A warewashing composition containing a polymeric sequestrant, nonionic surfactant, source of alkalinity and phosphate builder is described, as well as a method of making the same. The polymeric sequestrant is preferably a polyacrylate.
Description
HIGHLY ALKALINE WAREWASHING DETERGENT AND METHOD OF
MANUFACTURE THEREOF
Field of the Invention The present invention pertains to warewashing detergent compositions. More particularly, the present invention pertains to highly alkaline warewashing detergents or detergent compositions. Even more particularly, the present invention concerns highly alkaline warewashing detergents and methods of manufacturing therefor.
Prior Art
As is known to those skilled in the art to which the present invention pertains, historically, it has been virtually impossible to achieve a homogeneous highly alkaline, phosphate-built warewashing detergent system having a long shelf life.
While highly alkaline-containing products have been available in the form of solids, such as powders, briquettes, pellets, flakes, etc., there have been inherent drawbacks in the dispensing and utilization of these solids in dispensing systems. Liquid alkaline products suffer from precipitate formation because of ion exchange between the sodium and phosphate ions in the builders. Similarly, slurried products have the inherent tendency to separate over time. Thus, while there is presently known both the solid and liquid forms of highly alkaline warewashing detergents, their deployment is a drawback. Slurried products, while being readily dispensed, cannot achieve the degree of alkalinity desired, without the separation problems as discussed hereinabove.
Within this context, it is apparent that there is a demand for a highly concentrated, i.e., highly alkaline, liquid warewashing detergent that can be consistently dispensed and which is storage stable, i.e., does not separate over an extended period of time. As detailed hereinbelow, the present invention achieves this.
Description of the Preferred Embodiment
In accordance with the present invention, there is provided a liquid, highly alkaline warewashing detergent which is easily dispensed and which does not have any substantial phase separation over extended periods of time.
As is known to those skilled in the art to which the present invention pertains, in manufacturing a "liquid" detergent, necessarily there is included certain solid particles, such as hardness sequestering agents, alkalinity sources, etc., which are suspended in the liquid mixture and which, ultimately, separate out. It is this precipitation and phase separation which is precluded by the practice of the present invention.
In a first aspect, the present invention is directed to a superior detergent comprising a polymeric sequesterant , a nonionic surfactant, a source of alkalinity, a phosphate dertergent builder and water
In a second aspect hereof, the present invention provides a highly alkaline, homogenizable (i.e., homogenizable by mixing in a mill or in-line dynamic mixer) , warewashing composition.
With more particularity and, as noted above, the present invention provides a highly alkaline homogenized warewashing detergent or composition which, generally, comprises of: (a) a source of alkalinity;
(b) a polymeric sequestrant;
(c) a nonionic surfactant;
(d) a phosphate detergent builder;
(e) a second sequestrant; and, (f) water.
In a third aspect hereof, there is provided an improved method for preparing a highly alkaline liquid warewashing detergent. The method hereof is defined by homogenizing a liquid detergent by passing the detergent through a homogenizer at a temperature ranging from 110°F to 160°F, preferably from 115°F to 125°F. The time for effecting homogenization will depend on batch size, and the speed of the transfer pump in the homogenizing equipment. Although this processing step is applicable to liquid detergents, per se, the process is particularly applicable to the particular homogenizable highly alkaline liquid warewashing detergent composition, defined herein.
The source of alkalinity may be any suitable alkaline material, such as an alkaline hydroxide, e.g., sodium hydroxide, potassium hydroxide, or the like as well as mixtures thereof. Other sources include carbonates, silicates, metasilicates and the like. However, an alkaline hydroxide is preferred and, particularly, sodium hydroxide. Typically, the source of alkalinity may be a liquid such as a 50% aqueous solution of caustic soda, a
70% caustic aqueous solution of caustic soda; a 100% solid caustic source, such as beads, or the like, as well as mixtures thereof. Further, a mixture of an aqueous solution and a solid alkaline source may be used.
Preferred herein is a mixture of the 50% solution and 100% solid beads. Where used, generally, the solution and solid will be used in a , respective, weight ratio of 60% of solution to 40% of beads to impart the requisite alkalinity to the detergent.
In formulating the present highly alkaline warewashing product, generally, the source of alkalinity will be present in an amount ranging from at least 25% to 60%, by weight, based upon the total weight of the warewashing concentrate compound. Although, lower amounts thereof may be employed. To achieve the full benefit of the present invention and to enable a highly alkaline detergent, the higher levels, i.e., above 25%, are contemplated.
Generally, the polymeric sequestrant is present in an amount ranging from 1% to 5%, by weight, and preferably from 2.5% to 3.5%, by weight, based on the total weight of the concentrate.
The polymeric sequestrant, also, functions as al electrolyte in the solution. Polymeric compounds are well known and commercially available such as those sold under the trademark Acusol, by Rohm & Haas. These compounds are polyacrylate polymers, like polymethacrylates, well documented in the art, such as disclosed U.S. Patent No.
4,753,755, the disclosure of which is hereby incorporated by reference.
The nonionic surfactant contemplated for use herein is any of the well-known conventional nonionic surfactants. The surfactant functions as a defoamer while adding to the detergency properties of the composition. Again, the nonionic surfactants contemplated for use herein are well known and commercially available such as those sold by BASF Corporation under the mark Pluronic N3. Pluronic N3 is a polyoxypropylene-polyoxyethylene block copolymer nonionic surfactant. Other useful nonionic surfactants include those enumerated in U.S. Patent No. 5,064,561, the disclosure of which is hereby incorporated by reference.
Generally, the nonionic surfactant is present in the composition in an amount ranging from 0.1 to 5%, by weight and, preferably, from 0.5 to 2%, based on the total concentrate weight.
As noted hereinabove, a second sequestering agent or sequestrant is included in the composition hereof. Generally, such a sequestrant, which functions as a hardness sequestering agent, is typically and conventionally present in solid form. These hardness sequestering agents, are usually, phosphate-based and include the well known phosphate and polyphosphates such as trisodium phosphate, tetrasodium polyphosphate, tetrapotassium pyrophosphate, etc., as well as mixtures thereof.
It has been found in the practice of the present invention that where the hardness sequestrant is a potassium- containing compound, an ion exchange occurs in the solution between any sodium and the potassium-ion, promoting the formation of the precipitant. The sodium from the source of alkalinity replaces the potassium in the sequestrant to form tetrasodium pyrophosphate, which is a precipitate. However, because of their efficacy, the potassium-phosphate builders are incorporated hereinto. Ordinarily, the phosphate sequestrants are present in an amount ranging from 15% to 50% of the composition weight on a solids basis and, usually, from 25% to 40% on a solids basis.
The present composition may, also, include a third sequestrant or chelant which functions as an anti- redeposition agent. Usually, these chelant comprise a derivative of acetic acid or the salt thereof. Such compounds are well known and commercially available such as ethylene diamine tetraacetic acid (EDTA) , nitriloacetic acid (NTA) , the sodium salts thereof, as well as mixtures thereof .
In practicing the present invention, it has been found that a particularly preferred composition will include the source of alkalinity, the polyacrylate acid sequestrant, the tetrapotassium pyrophosphate as a hardness sequestrant, the nonionic surfactant, and the anti redeposition, chelant .
The balance of the concentrate composition is water.
It has been found that such a composition, while somewhat grainy, stays together at frequencies generated at transportation when homogenized. Although such a composition is particularly preferred herein, other compositions, using the components denoted above are well within the scope of the present invention.
Again, and as noted above, in formulating present compositions, generally, the surfactant will be present in an amount ranging from 0.5% to 2% by weight, based upon the total weight of the mixture; the antideposition compound or sequestrant to be used in the present invention in an amount ranging from 0.5% to 2% and the builder will be present in an amount ranging from 25% to 40% by weight. Generally, the composition will include, since it is a liquid, from 5% to 10% by water.
Other adjuvants such as a chlorine source may be included herewithin.
The composition hereof is a liquid concentrate which is readily admixed with water such as by pumping or the like from any suitable pump or other dispensing means, and may be dispensed through small tube boring. As a result of the homogenized state it has been shown to reach a concentration set point within 36 seconds to about four minutes in the wash tank and is maintainable thereof.
As noted above, the present invention also includes a process or method for preparing a highly alkaline concentrated warewashing detergent.
The process hereof, generally comprises, in no particular order, the steps of:
(a) dissolving the polymeric sequestrant in water;
(b) admixing the nonionic surfactant; (c) adding the source of alkalinity; and,
(d) admixing a hardness sequestering agent;
wherein the resulting mixture is homogenized.
Preferably, however, the process comprises the steps of:
(a ) dissolving the polymeric sequestrant in water;
(b ) admixing the nonionic surfactant therewith;
( c ) adding the source of alkalinity to the mixture of
(b ) ;
(d) admixing a hardness sequestering agent herewith; and
(e ) thereafter, homogenizing the mixture.
With more particularity, the first step in the process is typically the addition of the polymeric sequestrant to water. The addition of the polymer to water is, generally, done with mixing at an elevated temperature. Ordinarily, the temperature will range from 104°F to 149°F. The mixing will generally last for about one to about ten minutes, or until all of the contents are dissolved.
Thereafter, and while maintaining the temperature, the nonionic surfactant is readily added thereto with mixing.
Next, the source of alkalinity is introduced to the mixture with heat and stirring.
Then, the second or hardness sequestrant is added to the admixture obtained upon the addition of the source of alkalinity.
Finally, the entire mixture is homogenized.
In a most preferred embodiment, however, (a) is mixed with (b) to produce a first mixture, (c) is mixed with (d) to produce a second mixture, and the first and second mixture are mixed.
In preparing the instant composition, homogenization occurs at elevated temperature, as noted hereinabove, ranging from 110°F to 160°F. Generally, the time for effecting homogenization will depend on batch size and the speed of rotation of the homogenizing equipment.
Alternatively, it is possible to make a first solution of sequestrant and source of alkalinity, where the source of alkalinity is a liquid mixture. Then, this admixture is homogenized. Thereafter, the other components, which may be premixed as a second solution, are admixed with the homogenized liquid mixture. No particular order of addition is necessary if the remaining components are merely added to the homogenized mixture.
In either event though, the critical step hereto is the homogenization of the warewashing system.
For a more complete understanding of the present invention reference is made to the following illustrative, non-
limiting examples. In the examples, all parts are by weight absent contrary indications.
EXAMPLE I
5 This example illustrates the preparation of a highly alkaline warewashing detergent concentrate in accordance herewith.
Into an LRT Silverson Homogenizer equipped with a heat 0 source and stirrer is added 5.5 parts of water and 3.0 parts of a polymeric polyacrylic acid sequestrant sold under the name Acusol 45ND powder. The mixture is stirred until homogenous. The mixture is then covered to prevent evaporation. 5
Thereafter 1.5 parts of a nonionic surfactant sold under the name Pluronic N3 is added thereto and mixed thereinto at the same temperature. Then, 32.0 parts of a 50% aqueous caustic soda solution is added to the mix at a temperature
20 of 47 °C. The mixture immediately becomes gelatinous. The mixture is stirred thereafter for about twenty minutes. Then, 22.0 parts of 100% caustic soda beads are added, with rapid stirring. The temperature in the vessel is 48°C at the time of the addition. Stirring is continued for about
25 60 minutes until a somewhat grainy liquid is obtained.
Next, 36.0 parts of a 60% aqueous tetrapotassium polyphosphate solution is added to the mixture. The temperature in the vessel maintained at about 65°C while 30 stirring at 90-100 rpm for about 135 minutes.
Thereafter, the homogenizer is fitted with a high shear screen and the mixture is homogenized at 4500 rpm for two minutes at a temperature of 61 °C.
The product so-obtained is flowable, pumpable and does not evidence any precipitate or phase separation.
From the above it is to be seen that by homogenizing the compositions enhanced utilization and shelf life of a highly alkaline detergent is obtained.
Claims
1. A warewashing composition comprising:
(a) a polymeric sequestrant; and
(b) a nonionic surfactant;
(c) a source of alkalinity;
(d) a phosphate detergent builder;
(e) water.
2. The warewashing composition according to claim 1 wherein the warewashing composition further comprises a second sequestrant.
3. The warewashing composition according to claim 1 wherein the polymeric sequestrant is a polyacrylate.
4. The warewashing composition according to claim 3 wherein the polyacrylate is polymethacrylate .
5. The warewashing composition according to claim 1 wherein the nonionic surfactant is a polyoxypropylene- polyoxyethylene black copolymer.
6. The warewashing composition according to claim 5 wherein the nonionic surfactant is present in an amount from 0.1% to 5.0% by weight of the warewashing composition.
7. The warewashing composition according to claim 2 wherein the second sequestrant is a hardness sequestering agent.
8. The warewashing composition according to claim 7 wherein the second sequestrant is trisodium phosphate, tetrasodium polyphosphate, tetrasodium polyphosphate or tetrapotassium pyrophosphate.
9. The warewashing composition according to claim 1 wherein the composition further comprises a third sequestrant .
10. The warewashing composition according to claim 10 wherein the third sequestrant is EDTA, NTA, sodium salts thereof or mixtures thereof.
11. A process for making a warewashing detergent composition comprising, in no particular order, the steps of:
(a) dissolving a polymeric sequestrant in water;
(b) admixing an nonionic surfactant;
(c) adding a source of alkalinity; and
(d) admixing a hardness sequestering agent
wherein a mixture is formed.
12. The process for making a warewashing detergent composition according to claim 12 wherein the process further comprises the step of homogenizing the mixture.
13. The process for making a warewashing detergent composition according to claim 12 wherein the polymeric sequestrant is a polyacrylate.
14. The process for making a warewashing detergent composition according to claim 12 wherein the polyacrylate is polymethacrylate .
15. The process for making a warewashing detergent composition according to claim 12 wherein the nonionic surfactant is a polyoxypropylene-polyoxyethylene block copolymer .
16. The process for making a warewashing detergent composition according to claim 12 wherein the nonionic surfactant is present in an amount from 0.1% to 5.0% by weight of the warewashing composition.
17. The process for making a warewashing detergent composition according to claim 12 wherein the hardness sequestering agent is trisodium phosphate, tetrasodium polyphosphate, tetrasodium polyphosphate or tetrapotassium pyrophosphate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU52882/99A AU5288299A (en) | 1998-08-07 | 1999-07-22 | Highly alkaline warewashing detergent and method of manufacture thereof |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US9563098P | 1998-08-07 | 1998-08-07 | |
| US60/095,630 | 1998-08-07 | ||
| US34625799A | 1999-07-01 | 1999-07-01 | |
| US09/346,257 | 1999-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000008124A1 true WO2000008124A1 (en) | 2000-02-17 |
Family
ID=26790421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1999/005361 WO2000008124A1 (en) | 1998-08-07 | 1999-07-22 | Highly alkaline warewashing detergent and method of manufacture thereof |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU5288299A (en) |
| WO (1) | WO2000008124A1 (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB991980A (en) * | 1961-12-20 | 1965-05-12 | Rohm & Haas | Detergent compositions |
| US4147650A (en) * | 1976-02-23 | 1979-04-03 | Chemed Corporation | Slurried detergent and method |
| EP0120533A2 (en) * | 1983-03-25 | 1984-10-03 | Unilever N.V. | Aqueous alkaline liquid detergent composition |
| EP0469847A2 (en) * | 1990-08-01 | 1992-02-05 | Diversey Corporation | Dishwasher detergent composition |
| EP0516554A2 (en) * | 1991-05-31 | 1992-12-02 | Colgate-Palmolive Company | Phosphate-containing powdered automatic dishwashing composition with enzymes |
| EP0518719A1 (en) * | 1991-05-31 | 1992-12-16 | Colgate-Palmolive Company | Nonaqueous liquid automatic dishwashing composition containing enzymes |
| WO1993007248A1 (en) * | 1991-10-11 | 1993-04-15 | Church & Dwight Company, Inc. | Machine dishwashing detergent having a reduced condensed phosphate content |
| US5520841A (en) * | 1992-05-18 | 1996-05-28 | Henkel Kommanditgesellschaft Auf Aktien | Pumpable alkaline cleaning concentrates |
| WO1998051769A1 (en) * | 1997-05-13 | 1998-11-19 | The Procter & Gamble Company | Process for removing tarnish from tarnished silverware |
-
1999
- 1999-07-22 AU AU52882/99A patent/AU5288299A/en not_active Abandoned
- 1999-07-22 WO PCT/EP1999/005361 patent/WO2000008124A1/en active Application Filing
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB991980A (en) * | 1961-12-20 | 1965-05-12 | Rohm & Haas | Detergent compositions |
| US4147650A (en) * | 1976-02-23 | 1979-04-03 | Chemed Corporation | Slurried detergent and method |
| EP0120533A2 (en) * | 1983-03-25 | 1984-10-03 | Unilever N.V. | Aqueous alkaline liquid detergent composition |
| EP0469847A2 (en) * | 1990-08-01 | 1992-02-05 | Diversey Corporation | Dishwasher detergent composition |
| EP0516554A2 (en) * | 1991-05-31 | 1992-12-02 | Colgate-Palmolive Company | Phosphate-containing powdered automatic dishwashing composition with enzymes |
| EP0518719A1 (en) * | 1991-05-31 | 1992-12-16 | Colgate-Palmolive Company | Nonaqueous liquid automatic dishwashing composition containing enzymes |
| WO1993007248A1 (en) * | 1991-10-11 | 1993-04-15 | Church & Dwight Company, Inc. | Machine dishwashing detergent having a reduced condensed phosphate content |
| US5520841A (en) * | 1992-05-18 | 1996-05-28 | Henkel Kommanditgesellschaft Auf Aktien | Pumpable alkaline cleaning concentrates |
| WO1998051769A1 (en) * | 1997-05-13 | 1998-11-19 | The Procter & Gamble Company | Process for removing tarnish from tarnished silverware |
Also Published As
| Publication number | Publication date |
|---|---|
| AU5288299A (en) | 2000-02-28 |
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