Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate
2001-11-09
2003-12-30
Webb, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
C510S365000, C510S405000, C510S417000, C510S426000, C510S433000, C510S470000, C510S504000, C510S506000
Reexamination Certificate
active
06670319
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to blooming type hard surface cleaning compositions. More particularly the present invention relates to concentrated liquid compositions which are normally diluted in a larger volume of water to form a working solution therefrom, and which exhibit a blooming effect when diluted.
Blooming is a property exhibited by dilutable compositions such as known cleaning compositions, specifically pine-oil type cleaning compositions which contain a significant amount (generally at least about 5% and more) of pine oil. Certain phenolic disinfectant compounds, such as LYSOL(RTM) (where “RTM” indicates a proprietary tradename or trademark) disinfectant concentrate (Reckitt & Colman, Inc., Montvale N.J.) also exhibit such a blooming property. Blooming may be characterized as the formation of milky, creamy or cloudy appearance which is manifested when a dilutable composition is added to a larger volume or quantity of water. Such blooming is particularly desirable in compositions where the blooming characteristic in an aqueous dilution is long lasting.
SUMMARY OF THE INVENTION
Accordingly it is an object of the invention to provide an aqueous concentrated liquid hard surface cleaning composition which blooms when added to a larger volume of water which comprises the following constituents:
an organic solvent constituent;
binary co-solvent system comprising an alkyl diphenyl solvent and a co-solvent;
an amine oxide surfactant constituent;
optionally, a further detersive surfactant constituent;
optionally but desirably at least one optional constituent selected from: chelating agents, coloring agent, light stabilizers, fragrances, thickening agents, hydrotropes, pH adjusting agents, pH buffers, as well as others known the art and useful in similar compositions. The one or more optional constituents are selected to be present, and are included in amounts which do not undesirably affect the overall blooming characteristics of the present inventive compositions.
In preferred embodiments the concentrate compositions provide excellent initial blooming characteristics in ‘as mixed’ dilutions with water.
It is a further object of the invention to provide such a concentrated liquid hard surface cleaning composition wherein the composition exhibits a blooming effect when diluted in a larger volume of water.
It is among the further object of the invention to provide such a concentrated liquid hard surface cleaning composition wherein the composition exhibits good long term stability, i.e., shelf stability in its concentrated form.
It is a further aspect of the invention to provide a process for the cleaning of hard surfaces utilizing the compositions in either concentrated form or in diluted form as described herein.
DETAILED DISCLOSURE
Desirably, the inventive compositions are essentially free of terpene solvents such as alpha-terpineols or d-limonene which are characteristic of products such as so-called “pine oil” cleaning compositions which typically include such terpene solvents.
The inventive compositions include an organic solvent constituent. Many useful organic solvents may be used, as long as it does not undesirably disrupt the favorable characteristics of the invention, especially the blooming characteristic. Mixtures of two or more organic solvents may also be used as the organic solvent constituent.
Useful organic solvents are those which are at least parally water-miscible such as alcohols, water-miscible ethers (e.g. diethylene glycol diethylether, diethylene glycol dimethylether, propylene glycol dimethylether), water-miscible glycol ether (e.g. propylene glycol monomethylether, propylene glycol mono ethylether, propylene glycol monopropylether, propylene glycol monobutylether, ethylene glycol monobutylether, dipropylene glycol monomethylether, diethyleneglycol monobutylether), lower esters of monoalkylethers of ethyleneglycol or propylene glycol (e.g. propylene glycol monomethyl ether acetate) all commercially available from Union Carbide, Dow Chemicals or Hoescht. Mixtures of organic solvents can also be used.
Particularly useful organic solvents include glycols such as alkylene glycols such as propylene glycol, and glycol ethers. Useful glycol ethers are those having the general structure R
a
—O—R
b
—OH, wherein R
a
is an alkyl of 1 to 20 carbon atoms, or an aryl of at least 6 carbon atoms, and R
b
is an alkylene of 1 to 8 carbons or is an ether or polyether containing from 2 to 20 carbon atoms. Examples of such useful glycol ethers include propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol isobutyl ether, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol butyl ether, diethylene glycol phenyl ether, propylene glycol phenol ether, and mixtures thereof. Preferred are ethylene glycol n-butyl ether, diethylene glycol n-butyl ether, and mixtures thereof. Such glycol ethers are presently commercially available from a number of sources including in the DOWANOL™ glycol ether from The Dow Chemical Company, Midland Mich. (USA).
Further particularly useful organic solvents monohydric (straight chained or branched) primary, secondary or tertiary lower aliphatic alcohols, especially C
1
-C
6
aliphatic primary and secondary alcohols, of which isopropanol is particularly preferred.
The present inventors have found that inclusion of the organic solvent constituent in amounts of about 0.001% by weight to about 50% by weight have been found to be effective in providing effective cleaning, particularly when the compositions are dispersed into a larger volume of water, as well as in solubilizing other less water soluble constituents present in the concentrate compositions of the invention. Preferably, the organic solvent constituent is present in amounts of from 0.1-40% by weight, and most preferably from about 0.1-35% by weight.
Additionally the inventor has found the according to certain preferred embodiments the organic solvent constituent, comprises, and in certain especially preferred embodiments consist essentially of, both an alkylene glycol such as propylene glycol, and a monohydric lower aliphatic alcohol such as a C
1
-C
6
aliphatic primary and secondary alcohol, especially isopropyl alcohol.
The inventive compositions further also include a binary co-solvent system comprising alkyl biphenyl solvent and a co-solvent which aids in the solubilization of the biphenyl solvent in an aqueous medium.
The alkyl biphenyl solvent is one which may be generally represented by the formula
wherein:
R
1
is hydrogen or is a lower alkyl radical, preferably a C
1
-C
10
, but more preferably is a C
1
-C
6
straight chained or branched alkyl radical,
R
2
is a lower alkyl radical, preferably a C
1
-C
10
, but more preferably is a C
1
-C
6
straight chained or branched alkyl radical,
m is an integer from 1-3 inclusive; and,
n is an integer from 1-3 inclusive. Preferably R
1
is hydrogen, m is 1, and R
2
has any of the values indicated above. More preferably, R
1
is hydrogen and m is 1, and R
2
is a C
1
-C
6
straight chained or branched alkyl radical. It is to be understood that mixtures of the compounds indicated above may be used as the biphenyl solvent constituent.
Such alkyl biphenyls are, per se, known to the art, and are described in U.S. Pat. No. 3,787,181. Particularly useful as the alkyl biphenyl solvent are materials presently marketed as NUSOLV(RTM) ABP solvents (Ridge Technologies Inc., Ridgewood N.J.) described to be a high purity alkyl biphenyls and mixtures thereof, and is also available from Koch Chemical Co. (Corpus Christi, Tex.) as SURESOL(RTM) solvents.
The alkyl biphenyl solvent may be present in the concentrate compositions in amounts of from about 0.001% by weight to up to about 20% by weight, preferably about 0.01-10% by weight, most preferably in amount of between 0.1-8% by weight.
The inventors have observed that the concentrated compositions of the invention are greatly improved with the addition of a co-solvent. This co-solvent aids in
Cheung Tak Wai
Smialowicz Dennis Thomas
Reckitt Benckiser , Inc.
Webb Gregory
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