Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1999-07-27
2003-05-06
Delcotto, Gregory (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S191000, C510S199000, C510S423000, C510S433000, C510S434000, C510S466000, C510S477000, C510S488000, C510S495000, C510S503000, C510S504000, C510S505000
Reexamination Certificate
active
06559111
ABSTRACT:
The invention relates to hard surface cleaning and disinfecting compositions providing a protective layer for water and stain repellency.
Cleaning compositions are commercially important products and enjoy a wide field of utility in assisting in the removal of dirt and grime from surfaces, especially those characterized as useful with “hard surfaces”. Hard surfaces are those which are frequently encountered in lavatories such as toilets, shower stalls, bathtubs, bidets, sinks, etc., as well as countertops, walls, floors, etc. In such lavatory environment various forms of undesirable residues are known to form including hard water stains as well as “soap scum stains”. Hard water stains are mineral stains caused by the deposition of salts, such as calcium or magnesium salts, frequently present in hard water. Soap scum stains are residues of fatty acid soaps such as those which are based on alkali salts of low fatty acids, which precipitate in hard water due to the presence of metal salts therein, leaving an undesirable residue upon such surfaces.
The prior art has suggested many compositions which are directed to the cleaning of such hard water and soap scum stains. (“Soap scum” is sometimes referred to as “limescale” in Europe.) Many of these are acidic, aqueous compositions which include one or more detersive surfactants. A limited number of these compositions, in addition to a detersive benefit, also provide a germicidal or sanitizing effect to the hard surfaces being treated. Many of these prior art compositions also suffer from the shortcoming in that they do not provide any significant long term cleaning or sanitizing benefit to the treated hard surfaces as they are easily rinsed away with water, and thus are not retained on the treated hard surface. It would be desirable to provide a hard surface cleaning and/or disinfecting composition which is effective in the removal of hard water stains and/or soap scum stains from hard surfaces, which also provides a long term cleaning or sanitizing benefit. While such a formulation would be desirable to the art, such is not easy to produce. While it is known that polymers and film forming materials can be utilized to give a hard surface a protective layer, (i.e., acrylates, urethanes and silanes,) such materials are usually not compatible with chelating agents, quaternary ammonium salts, or in non-neutral pH conditions (i.e., acidic) that are known to be advantageous for cleaning and disinfecting of hard surfaces.
Accordingly there is a real and continuing need in the art for improved hard surface treatment compositions which provide a cleaning or disinfecting benefit, (preferably both) and which form a film on the treated surface to provides a residual protective benefit.
It is therefore among the objects of the invention to provide an aqueous acidic hard surface treatment composition which provides a cleaning benefit (particularly useful against hard water stains or soap scum, desirably both) or a disinfecting benefit which also forms film or surface coating on the treated hard surfaces, but which most desirably provides both a cleaning and disinfecting benefit. This film or surface coating provides the benefit of water or stain repellency to the treated hard surface, or provides the benefit of residual disinfection to the treated hard surface, but preferably provides both benefits.
It is yet a further object of the invention to provide a readily pourable and readily pumpable cleaning composition which features the benefits described above.
It is a further object of the invention to provide a process for cleaning or sanitization of hard surfaces, which process comprises the steps of providing the composition as outlined above, and applying an effective amount to a hard surface.
These and other objects of the invention will be more apparent from a reading of the specification and of the claims attached.
According to a first aspect of the invention there is provided an aqueous, acidic hard surface cleaning composition which provides a cleaning benefit or disinfecting benefit (preferably both benefits) to a hard surface which comprises the following constituents:
(a) a film-forming, organosilicone quaternary ammonium compound;
(b) at least one zwitterionic surfactant compound which is compatible with the quaternary ammonium compound, preferably including at least one amine oxide compound;
(c) at least one nonionic surfactant;
(d) at least one organic solvent; and,
(e) optionally, at least one amphoteric surfactant;
(f) water.
wherein the aqueous compositions are at an acidic pH, preferably are at a pH of 4 or less, (preferably at a pH of 3 or less, even more preferably at a pH of 2 or less) and wherein the aqueous compositions may be characterized as forming a film or surface coating which provides the benefit of water or stain repellency to the treated hard surface, or provides the benefit of residual disinfection to the treated hard surface, but preferably provides both benefits.
The compositions described above may include one or more further optional constituents including but not limited to further non-aqueous (organic) solvents, pH buffering agents, perfumes, perfume carriers, colorants, hydrotropes, germicides, thickeners, fungicides, anti-oxidants, anti-corrosion agents, etc.
Preferred compositions according to the invention are largely aqueous, comprising at least 80% wt. water, and are readily pourable and pumpable. The preferred compositions all exhibit good storage stability.
According to a second aspect of the invention, there is provided a process for cleaning or sanitization of hard surfaces, which process comprises the step of providing the composition as outlined above, and applying an effective amount to a hard surface requiring such treatment.
The compositions of the present invention provide excellent cleaning efficacy on hard water stains or soap scum on hard surfaces, as well as providing water repellency, and soap scum and hard water stain removal benefits. At the same time, the preferred compositions of the present invention also provide disinfecting efficacy to hard surfaces, while imparting a film or surface coating to the hard surface, which acts as a barrier to repel water and facilitate the reduction or prevention of further hard water stains or soap scum on said hard surfaces.
The acidic, aqueous compositions according to the invention comprise (a) a film-forming, organosilicone quaternary ammonium compound. Such compounds desirably also exhibit antimicrobial activity, especially on hard surfaces.
Specific examples of organosilicone quaternary ammonium salts that may be used in the compositions of this invention include organosilicone derivatives of the following ammonium salts: di-isobutylcresoxyethoxyethyl dimethyl benzyl ammonium chloride, di-isobutylphenoxyethoxyethyl dimethyl benzyl ammonium chloride, myristyl dimethylbenzyl ammonium chloride, myristyl picolinium chloride, N-ethyl morpholinium chloride, laurylisoquinolinium bromide, alkyl imidazolinium chloride, benzalkonium chloride, cetyl pyridinium chloride, coconut dimethyl benzyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride, alkyl dimethyl benzyl ammonium chloride, alkyl diethyl benzyl ammonium chloride, alkyl dimethyl benzyl ammonium bromide, di-isobutyl phenoxyethoxyethyl trimethyl ammonium chloride, di-isobutylphenoxyethoxyethyl dimethyl alkyl ammonium chloride, methyl-dodecylbenzyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide, octadecyl dimethyl ethyl ammonium bromide, cetyl dimethyl ethyl ammonium bromide, octadec-9-enyl dimethyl ethyl ammonium bromide, dioctyl dimethyl ammonium chloride, dodecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium iodide, octyl trimethyl ammonium fluoride, and mixtures thereof. Other water dispersible salts, such as the acetates, sulfates, nitrates and phosphates, are effective in place of the halides, but the chlorides and bromides are preferred. The silicone group is preferably substituted
Bennett Mark Timothy
Colurciello, Jr. Andrew Francis
Delcotto Gregory
Fish & Richardson P.C.
Reckitt Benckiser , Inc.
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