Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2003-03-05
2003-08-12
Boyer, Charles (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S220000, C510S222000, C510S223000, C510S226000, C510S228000, C510S230000, C510S296000, C510S413000, C510S434000, C510S436000, C510S439000, C510S477000, C510S514000
Reexamination Certificate
active
06605578
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an automatic dishwashing composition disposed in a water soluble package that can be added directly into an automatic dishwasher.
BACKGROUND OF THE INVENTION
U.S. Pat. Nos. 6,191,088; 5,998,346; 5,693,602; 5,750,483; 5,468,411; 5,279,756; 5,240,632 and 5,205,954 relate to an aqueous gel automatic dishwashing composition. The use of these compositions are burdensome and difficult to obtain precise dosing.
SUMMARY OF THE INVENTION
The present invention relates to an automatic dishwashing cleaning system comprising:
(a) a water soluble container; and
(b) an aqueous liquid automatic dishwashing composition disposed in said water soluble container.
An object of the present invention is to provide an aqueous automatic dishwashing composition disposed in a water soluble container, wherein the system containing the aqueous automatic dishwashing composition and container can be placed directly into an automatic dishwasher.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to an automatic dishwashing cleaning package which is a system comprising:
(a) a water soluble container; and
(b) an aqueous automatic dishwashing composition disposed in said water soluble container, wherein said aqueous liquid automatic dishwashing composition comprises approximately by weight:
(i) 15% to 25%, more preferably 17% to 23% of pentasodium triphosphate;
(ii) 15% to 25%, more preferably 17% to 23% of sodium citrate;
(iii) 5% to 15%, more preferably 7% to 13% of potassium citrate;
(iv) 0.5% to 15%, more preferably 7% to 13% of potassium sulfate;
(v) 0 to 10%, most preferably 0.1% to 8%, more preferably 0.5% to 8% of a mixture of a protease enzyme and an amylase enzyme in a weight ratio of protease enzyme to amylase enzyme of 10:1 to 1:10, more preferably 2:1 to 1:2;
(vi) 0 to 6%, more preferably 0.25% to 5% of a sodium salt of a polyacrylic acid homopolymer and/or a sodium salt of a copolymer of polyacrylic acid and sulfonic acid;
(vii) 0.1% to 4% of an ethoxylated nonionic surfactant; and
(viii) the balance being water.
Excluded from the instant compositions are anionic surfactants, fatty acid or alkali metal salts of fatty acid, alkali metal silicates, chlorine bleach compounds, and crosslinked polyacrylate polymers.
The nonionic surfactants that can be used in the present automatic dishwasher detergent compositions are generally described as ethoxylated/propoxylated fatty alcohols which are low-foaming surfactants and may be possibly capped, characterized by the presence of an organic hydrophobic group and an organic hydrophilic group and are typically produced by the condensation of an organic aliphatic or alkyl aromatic hydrophobic compound with ethylene oxide and/or propylene oxide (hydrophilic in nature). Practically any hydrophobic compound having a carboxy, hydroxy, amide or amino group with a free hydrogen attached to the oxygen or the nitrogen can be condensed with ethylene oxide or propylene oxide or with the polyhydration product thereof, polyethylene glycol, to form a nonionic detergent. The length of the hydrophilic or polyoxyethylene chain can be readily adjusted to achieve the desired balance between the hydrophobic and hydrophilic groups. Typical suitable nonionic surfactants are those disclosed in U.S. Pat. Nos. 4,316,812 and 3,630,929.
Preferably, the nonionic surfactants that are used are the low-foaming polyalkoxylated lipophiles wherein the desired hydrophile-lipophile balance is obtained from addition of hydrophilic poly-lower alkoxy group to a lipophilic moiety. A preferred class of the nonionic detergent employed is the poly-lower alkyoxylated higher alkanol wherein the alkanol is of 9 to 18 carbon atoms and wherein the number of moles of lower alkylene oxide (of 2 or 3 carbon atoms) is from 3 to 15. Of such materials, it is preferred to employ those wherein the higher alkanol is a high fatty alcohol of 9 to 11 or 12 to 15 carbon atoms and which contain from 5 to 15 or 6 to 16 lower alkoxy groups per mole. Preferably, the lower alkoxy is ethoxy but in some instances, it may be desirably mixed with propoxy, the latter, if present, usually being major (more than 50%) portion. Exemplary of such compounds are those wherein the alkanol is of 12 to 15 carbon atom and which contain about 7 ethylene oxide groups per mold.
Useful nonionics are represented by the low foam Plurafac series from BASF Chemical Company which are the reaction product of a higher linear alcohol and a mixture of ethylene and a propylene oxides, containing a mixed chain of ethylene oxide and propylene oxide, terminated by a hydroxyl group. Examples include Product A (a C
12
-C
15
fatty alcohol condensed with 6 moles ethylene oxide and 3 moles propylene oxide). Product B (a C
12
-C
15
fatty alcohol condensed with 7 mole propylene oxide and 4 mole ethylene oxide), and Product C (a C
12
-C
15
fatty alcohol condensed with 5 moles propylene oxide and 10 moles ethylene oxide). Another group of liquid nonionics are available from Shell Chemical Company, Inc. under the Dobanol trademark: Dobanol 91-5 is a low foam ethoxylated C
g
-C
11
fatty alcohol with an average of 5 moles ethylene oxide and Dobanol 25-7 is an ethoxylated C
12
-C
15
fatty alcohol with an average of 7 moles ethylene oxide. Another liquid nonionic surfactant that can be used is sold under the tradename Lutensol SC 9713.
Plurafac nonionic surfactants from BASF are biodegradable, low-foaming surfactant which are specially preferred for the instant automatic dishwashing compositions. Plurafac™ SLF18 which is water dispensible and has a low surface tension and low cloud and is low foaming is especially preferred for use in the instant automatic dishwashing compositions.
Other useful surfactants are Neodol 25-7 and Neodol 23-6.5, which products are made by Shell Chemical Company, Inc. The former is a condensation product of a mixture of higher fatty alcohols averaging about 12 to 13 carbon atoms and the number of ethylene oxide groups present averages about 6.5. The higher alcohols are primary alkanols. Other examples of such detergents include Tergitol 15-S-7 and Tergitol 15-S-9 (registered trademarks), both of which are linear secondary alcohol ethoxylates made by Union Carbide Corp. The former is mixed ethoxylation product of 11 to 15 carbon atoms linear secondary alkanol with seven moles of ethylene oxide and the latter is a similar product but with nine moles of ethylene oxide being reacted.
The sodium salt of the polyacrylic acid homopolymer has a molecular weight of about 2,000 to about 8,000, more preferably about 3,000 to about 6,000. A preferred sodium salt of the polyacrylic acid homopolymer is Acusol 445ND™ having a molecular weight of about 4,500 which is manufactured by Rohm and Haas. The sodium salt of the copolymer of polyacrylic acid/sulfonic acid has a molecular weight of about 8,000 to about 16,000 and is Acusol™ 587 manufactured by Rohm and Haas.
The detergent formulation also can optionally contain a mixture of a protease enzyme and an amylase enzyme and, optionally, a lipase enzyme that serve to attack and remove organic residues on glasses, plates, pots, pans and eating utensils. Lipolytic enzymes can also be used in the automatic dishwashing composition. Proteolytic enzymes attack protein residues, lipolytic enzymes fat residues and amylolytic enzymes starches. Proteolytic enzymes include the protease enzymes subtilisn, bromelin, papain, trypsin and pepsin. Amylolytic enzymes include amylase enzymes. Lipolytic enzymes include the lipase enzymes. The preferred amylase enzyme is Duramyl™ 300L, Type DX having an activity of 300 KNU/g. It is an alpha amylase prepared by submerged fermentation of a selected strain of Bacillius.
A preferred protease enzyme is Everlase™ 16.OL Type, Ex sold by Novozyme. It has an actively of 16 EPU/g and is prepared by submerged fermentation of an genetically modified strain of Bacillus. Another useful protease enzyme is Durazym™ 16.0 L Type Ex which is sold by Novozyme and has an activity of 16 DPU/g. It is a protein-engineered vari
Fleckenstein Melissa
Zyzyck Leonard
Boyer Charles
Colgate-Palmolive Co.
Nanfeldt Richard E.
LandOfFree
Automatic dishwashing cleaning system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic dishwashing cleaning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic dishwashing cleaning system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3122470