Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using disinfecting or sterilizing substance
Reexamination Certificate
1999-05-13
2002-08-20
McKane, Elizabeth (Department: 1744)
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Using disinfecting or sterilizing substance
C424S405000, C424S616000, C424S725000, C424S736000, C424S739000, C424S742000, C424S747000, C424S750000, C424S765000, C424S770000
Reexamination Certificate
active
06436342
ABSTRACT:
TECHNICAL FIELD
The present invention relates to sprayable liquid compositions suitable for disinfecting animate surfaces, for example, human skin or inanimate surfaces including hard surfaces, walls, tiles, table tops, bathroom surfaces, kitchen surfaces, as well as fabrics, clothes, carpets.
BACKGROUND
Antimicrobial compositions include materials which have the ability to disinfect. It is generally recognised that a disinfecting material greatly reduces or even eliminates the microorganisms existing on a surface. Compositions based on halogen containing compounds like hypochlorite, or on quaternary compounds, have been extensively described in the art for disinfecting purpose. Compositions comprising peroxygen bleaches are also known as disinfecting compositions.
Representative of the prior art is, for example, W088/00795 which discloses liquid disinfecting compositions comprising a compound selected from the group of organic acids, perborates, peracids and their salts, together with other antimicrobial compounds like a quaternary ammonium salt and an essential oil.
However, such disinfecting compositions are not fully satisfactory for the consumer who is looking for an effective disinfecting composition which can be easily used in various disinfecting applications, for example, in a spray form, in a safe manner to the consumer and the environment.
Indeed, a drawback associated to such disinfecting compositions based on, for example, peracids is that they may damage surfaces onto which they are contacted to perform their disinfecting action. Indeed, such disinfecting compositions based on peracids are perceived by the consumers as being not safe to various surfaces, including hard-surfaces or fabrics.
It is therefore an object of the present invention to provide effective disinfecting compositions even when used upon high diluted conditions which are convenient to use by the consumer and safe to the surface and the environment.
It has now been found that this can be achieved by providing a sprayable liquid disinfecting composition comprising a hydrogen peroxide, an antimicrobial essential oil, and a shear thinning polymeric thickener. More particularly, it has been found that the liquid hydrogen peroxide-containing compositions of the present invention comprising said antimicrobial essential oil and shear thinning polymeric thickener, exhibit improved safety to the surface treated therewith, while providing effective disinfecting performance on clean surfaces, i.e., surfaces being free of any organic and/or inorganic soils, even at high dilution levels, i.e., up to dilution levels of 1:100 (composition:water).
Furthermore, it has been found that the sprayable liquid hydrogen peroxide-containing compositions of the present invention comprising said antimicrobial essential oil and shear thinning polymeric thickener, exhibit improved safety to the user upon usage, as compared to the same compositions without said shear thinning polymeric thickener. Indeed, an advantage of the liquid compositions of the present invention is that the inhalation by the user of said compositions is prevented or diminished, when dispensing said compositions onto a surface to be disinfected via a spray-type dispenser. Thus, the compositions herein allow to avoid potential health issues like nose and/or throat irritation and/or coughing or even lung damage, that may otherwise occur from inhalation of hydrogen peroxide mist or fog that may have formed when spraying onto a surface a hydrogen peroxide-containing composition being free of said shear thinning polymeric thickener. A further advantage of the pre sent invention is that also eye irritation and/or damage is prevented when spraying onto a surface to be disinfected a liquid composition according to the present invention.
Another advantage of the present invention is that the liquid compositions comprising hydrogen peroxide, an antimicrobial essential oil and a shear thinning polymeric thickener are easily dispensed onto the surface to be disinfected via a spray-type dispenser (e.g., a manually operated trigger-type dispenser). Indeed, said compositions result in a shear thinning behaviour for ease of dispensing, i.e. said compositions are thinner at higher shear rates. Thus, said compositions pass easily through the pumping mechanism of a spray-type dispenser where the shear rate is high and immediately after recover their thickened character when reaching the surface to be treated and adhere thereto. Also, the life time of a spray-type dispenser head is extended, i.e., the shear thinning behaviour of said compositions prevents clogging of said head.
Another advantage of the present invention is that sprayable liquid disinfecting compositions may be applied uniformly to a relatively large area of a surface to be disinfected via a spray-type dispenser, thereby ensuring effective disinfecting performance. Indeed, effective disinfecting performance is provided on a broad range of pure bacterial strains including Gram positive and Gram negative bacterial strains and more resistant micro-organisms like fungi.
A further advantage of the compositions of the present invention is that besides the disinfecting properties delivered, good cleaning is also provided, especially in the embodiment of the present invention where the compositions herein further comprise a surfactant or a mixture thereof.
Also, the compositions according to the present invention are suitable to be used on all types of surfaces including animate surfaces like human skin or mouth (e.g., as an oral preparation or toothpaste) as well as inanimate surfaces like hard-surfaces and in laundry applications, e.g., as a laundry detergent, laundry additive or even laundry pretreater. More particularly, an advantage of the compositions according to the present invention is that they are suitable to be used on delicate surfaces including those surfaces in contact with food and/or babies in a safe manner. Furthermore, when using the compositions according to the present invention in diluted conditions, the amount of chemical residues left onto the surfaces is reduced. Thus, it may not be necessary to rinse, for example, a hard-surface after said compositions have been applied thereto in diluted conditions.
SUMMARY OF THE INVENTION
The present invention encompasses a sprayable liquid disinfecting composition comprising hydrogen peroxide, an antimicrobial essential oil and a shear thinning polymeric thickener.
The present invention further encompasses a process for disinfecting a surface wherein a liquid composition as described herein, is sprayed onto said surface.
The present invention also encompasses a liquid disinfecting composition as described herein, packaged in a spray dispenser.
DETAILED DESCRIPTION OF THE INVENTION
The Sprayable Liquid Disinfecting Compositions
As an essential element the compositions according to the present invention comprise hydrogen peroxide.
It is believed that the presence of hydrogen peroxide, in the compositions of the present invention contribute to the disinfecting properties of said compositions. Indeed, hydrogen peroxide may attack the vital function of the microorganism cells, for example, it may inhibit the assembling of ribosomes units within the cytoplasm of the microorganism cells. Also, hydrogen peroxide, is a strong oxidiser that generates hydroxyl free radicals which attack proteins and nucleic acids. Furthermore, the presence of hydrogen peroxide provides strong stain removal benefits which are particularly noticeable, for example, in laundry and/or hard surfaces applications.
Typically, the compositions herein comprise from 0.01% to 15% by weight of the total composition of hydrogen peroxide, preferably from 0.5% to 10%, and more preferably from 0.8% to 8%.
As a second essential ingredient, the compositions according to the present invention comprise an antimicrobial essential oil, or a mixture thereof. Typically, the compositions herein comprise at least 0.001% by weight of the total composition of said antimicrobial essential oil, or mixture s th
Petri Marco
Trani Marina
Fayette Thibault
McKane Elizabeth
The Procter & Gamble & Company
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