Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2003-01-07
2003-09-02
Hardee, John (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S467000
Reexamination Certificate
active
06613727
ABSTRACT:
BACKGROUND OF THE INVENTION
Many compositions currently used in the industrial and institutional industry do not exhibit stability over broad temperature ranges typically encountered with the shipping and storage of these compositions. Such compositions include, e.g., compositions useful in the lowering of the alkalinity of textiles. These compositions are typically transported and stored in unheated transportation vehicles (e.g., trucks) and stored in unheated units (e.g., sheds or warehouses). The lack of stability of these compositions can often be seen as a solidification (i.e., precipitation) of one or more components in the composition. This solidification can result, e.g., in a loss of homogeneity in pumping the composition, which can cause nozzle plugging. This is time consuming as well as financially expensive.
Currently, there is a need for a composition that is suitable for lowering the alkalinity of a textile while exhibiting stability as a solution or as a dispersion at a temperature of about 0° C. to about 8° C.
SUMMARY OF THE INVENTION
It has surprisingly been discovered that a composition suitable for lowering the alkalinity of a textile or suitable for cleansing or treating a hard surface or a porous surface while exhibiting stability as a solution or as a dispersion at a temperature of about 0° C. to about 8° C. can be obtained by the incorporation of a phosphonium compound into the composition.
The composition of the present invention, upon cooling to about 0° C. (e.g., from about 0° C. to about 8° C.), may form a colloidal suspension or may form a dispersion with less freezing or with less crystal formation than known compositions suitable for lowering the alkalinity of a textile or suitable for cleansing or treating a hard surface or a porous surface. The composition of the present invention will also require less agitation or will require less heating than known compositions suitable for lowering the alkalinity of a textile or suitable for cleansing or treating a hard surface or a porous surface, to redissolve any suspended particles in solution.
The present invention provides a composition that is suitable for lowering the alkalinity of a textile. The composition is also suitable for cleansing or treating a hard surface or a porous surface. The composition exhibits stability as a solution or as a dispersion at a temperature of about 0° C. to about 8° C. The composition includes a carrier, an acid, and a quaternary phosphonium compound, or a suitable salt or solvate thereof In one preferred embodiment, the carrier (e.g., water) is present in about 40 wt. % to about 99 wt. % of the composition; the acid (e.g., oxalic acid) is present in about 1 wt. % to about 60 wt. % of the composition; the quaternary phosphonium compound (e.g., tetrakis(hydroxymethyl)phosphonium sulfate) is present in about 0.001 wt. % to about 10 wt. % of the composition.
The present invention also provides a method for cleansing or treating a surface. The method includes contacting the surface with an effective amount of a composition of the present invention to provide a treated or cleansed surface having a pH below about 7.5. In one embodiment, the surface is a hard surface (e.g., cooking utensil, eating utensil, a hard architectural surface, a motorized vehicle, or a food material).
The present invention also provides a method for preparing a composition of the present invention. The method includes combining the carrier, the acid, and the quaternary phosphonium compound, or a suitable salt or solvate thereof, in any order, to provide the composition. In one embodiment, the quaternary phosphonium compound contacts the carrier before the acid contacts the carrier. In another embodiment, the method further includes heating stirring, shaking, or agitating the composition.
DETAILED DESCRIPTION OF THE INVENTION
The following definitions are used, unless otherwise described: halo is fluoro, chloro, bromo, or iodo. Alkyl, alkoxy, alkenyl, alkynyl, etc. denote both straight and branched groups; but reference to an individual radical such as “propyl” embraces only the straight chain radical, a branched chain isomer such as “isopropyl” being specifically referred to. Aryl denotes a phenyl radical or an ortho-fused bicyclic carbocyclic radical having about nine to ten ring atoms in which at least one ring is aromatic. Heteroaryl encompasses a radical attached via a ring carbon of a monocyclic aromatic ring containing five or six ring atoms consisting of carbon and one to four heteroatoms each selected from the group consisting of non-peroxide oxygen, sulfur, and N(Q) wherein Q is absent or is H, O, (C
1
-C
4
)alkyl, phenyl or benzyl, as well as a radical of an ortho-fused bicyclic heterocycle of about eight to ten ring atoms derived therefrom, particularly a benz-derivative or one derived by fusing a propylene, trimethylene, or tetramethylene diradical thereto.
Specific and preferred values listed below for radicals, substituents, and ranges, are for illustration only; they do not exclude other defined values or other values within defined ranges for the radicals and substituents
Specifically, (C
1
-C
24
)alkyl can be methyl, ethyl, propyl, isopropyl, butyl, iso-butyl, sec-butyl, pentyl, 3-pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, or eicosyl; (C
3
-C
8
)cycloalkyl can be cyclopropyl, cyclobutyl, cyclopentyl, or cyclohexyl; (C
1
-C
24
)alkoxy can be methoxy, ethoxy, propoxy, isopropoxy, butoxy, iso-butoxy, sec-butoxy, pentoxy, 3-pentoxy, hexyloxy, heptoxy, octoxy, nonoxy, dedecoxy, undecoxy, dodecoxy, tridecoxy, tetradecoxy, or eicosoxy; (C
2
-C
6
)alkenyl can be vinyl, allyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1,-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, or 5-hexenyl; (C
2
-C
6
)alkynyl can be ethynyl, 1-propynyl, 2-propynyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3-pentynyl, 4-pentynyl, 1-hexynyl, 2-hexynyl, 3-hexynyl, 4-hexynyl, or 5-hexynyl; aryl can be phenyl, indenyl, or naphthyl; and heteroaryl can be furyl, imidazolyl, triazolyl, triazinyl, oxazoyl, isoxazoyl, thiazolyl, isothiazoyl, pyrazolyl, pyrrolyl, pyrazinyl, tetrazolyl, pyridyl, (or its N-oxide), thienyl, pyrimidinyl (or its N-oxide), indolyl, isoquinolyl (or its N-oxide) or quinolyl (or its N-oxide).
In cases where compounds are sufficiently basic or acidic to form stable nontoxic acid or base salts, use of the compounds as salts may be appropriate. Examples of acceptable salts are organic acid addition salts formed with acids which form an anion, for example, tosylate, methanesulfonate, acetate, citrate, malonate, tartarate, succinate, benzoate, ascorbate, ketoglutarate, and glycerophosphate. Suitable inorganic salts may also be formed, including hydrochloride, phosphate, sulfate, nitrate, bicarbonate, and carbonate salts.
Acceptable salts may be obtained using standard procedures well known in the art, for example by reacting a sufficiently basic compound such as an amine with a suitable acid affording an acceptable anion. Alkali metal (for example, sodium, potassium or lithium) or alkaline earth metal (for example calcium) salts of carboxylic acids can also be made.
Any suitable carrier can be employed in the composition, provided the composition exhibits stability as a solution or as a dispersion at a temperature of about 0° C. to about 8° C. Preferably, the carrier is water, wherein the water can optionally be deionized. Alternatively, the carrier can be a water-soluble solvent. Suitable water-soluble solvents include alcohols and polyols such as ethanol, propanol, ethylene glycol, propylene glycol, or any combination thereof In addition, the water-soluble solvent can be used alone or in conjunction with water.
The carrier can be present in any suitable amount, provided the composition exhibits stability as a solution or as a dispersion at a temperature of about 0° C. to about 8° C. Preferably, the carrier can be present in about 40 wt. % to about 99 wt. % of the composition. More preferably, th
Li Minyu
Olson Lynne Ann
Ecolab Inc.
Hardee John
LandOfFree
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