Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
1999-04-12
2001-07-03
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...
C510S188000, C510S199000, C510S214000, C510S215000, C510S243000, C510S433000, C510S434000, C510S503000, C510S504000
Reexamination Certificate
active
06255270
ABSTRACT:
FIELD OF THE INVENTION
This invention relates mildly acidic amine oxide cleaners containing a quat disinfectant.
BACKGROUND OF THE INVENTION
The use of amine oxide surfactants in cleaning compositions is known. Amine oxides are commonly used as cosurfactants to boost and maintain suds formation in laundry, shampoo, and dishwashing detergent compositions. Amine oxides have been used in hard surface cleaners such as acidic toilet bowl cleaners (pH of 2 or less), dishwashing liquids containing occlusive emollients (pH of 4 to 6.9), and selected non-acidic (neutral to alkaline) hard surface cleaners. In non-acidic hard surface cleaners, amine oxide detergent surfactants are essentially non-ionic (pK
a
between about 4 and about 6). These nonionic amine oxides provide good cleaning properties and leave little or no visible residue on hard surfaces when they dry.
Quats U.S. Pat. No. 5,435,935, issued to Kupneski, Jul. 25, 1995, herein incorporated by reference, disclose the use of quaternary ammonium (quats) compounds in alkaline liquid hard surface cleaning compositions.
Non-acidic hard surface cleaners containing amine oxides will stain or discolor vinyl (polyvinyl chloride) surfaces. The staining amounts to a light yellow to dark brown discoloration of the vinyl. Staining will also occur on waxed vinyl surfaces where areas of wax are worn thin or are chipped away so that the amine oxide can come in direct contact with the vinyl.
Co-pending and commonly assigned, U.S. patent application Serial No. 08/412,622 (P&G Case 4980R), Wierenga, discloses a mildly acidic hard surface cleaning composition containing amine oxide surfactant with quaternary ammonium disinfectants (quats). However, the compositions, per se, at acidic pH's are incompatible with quaternary ammonium disinfectants in that the quats loose their ability to disinfect.
It is therefore an object of the present invention to provide a hard surface cleaning composition containing mildly acidic amine oxide detergent surfactants that will disinfect and clean with minimal or no vinyl staining.
Another object of the invention to provide such a composition which will disinfect and not leave a visible residue on cleaned surfaces.
It is also an object of this invention to provide a process for cleaning vinyl surfaces using such a composition.
SUMMARY OF THE INVENTION
The compositions of this invention provide a superior combination of cleaning, disinfecting and waxed floor finish compatibility over the state of the art compositions. The preferred compositions are mildly acidic liquid hard surface cleaning compositions comprising:
a) an amine oxide detergent;
b) a quaternary disinfectant (quat);
c) an acidifying agent; and
d) an effective amount of an electrolytic disinfecting booster.
Preferred are ready to use compositions that have a pH of from 3 to less than 7 and from 40 ppm to about 12,500 ppm of amine oxide detergent and from about 50 ppm to about 1500 ppm, preferably at least 500 ppm of quat.
Also disclosed are concentrated hard surface cleaning compositions. The concentrated compositions are formulated to be used as is or diluted with an aqueous carrier at a level of 1:1 up to 1:600. The preferred ratio level is from 1:10 to 1:600 by volume or by weight, more preferably from 1:20 to 1:300, most preferably 1:30 to 1:260. These concentrated compositions of this invention preferably have from about 0.5 to about 40 parts, more preferably 1 to 30 parts, most preferably 1 to 25 parts of an amine oxide detergent surfactant; from about 1 part to about 25 part, preferably 1 to 20 parts, and more preferably 2-16 parts of a quaternary disinfectant; an effective amount, preferably from 0.05 parts to 10 parts, more preferably 0.5 to 5 parts, of an acidifying agent having a pK
a
of less than about 6.0; and an effective amount, from 0.05 to 12 parts, preferably 0.2 to 8 parts, and most preferably from 0.2 to 2 parts of an electrolytic disinfecting booster; whereby when said concentrated compositions are mixed with a predetermined amount of water to provide ready to use compositions. The preferred specific gravity of the concentrated liquids of this invention is from 0.9 to 1.1.
The compositions contain enough acidifying agent to protonate at least about 10% of the amine oxide and also provide a dilute composition pH of between about 3 and 7, preferably from 4 to 6. These liquid hard surface cleaning and disinfecting compositions have excellent disinfecting and cleaning properties. They are wax safe. They can be no-rinse compositions. They do not leave a visible residue when they dry. They cause minimal or no staining of vinyl surfaces. Also disclosed is a method for disinfecting and cleaning vinyl surfaces using the liquid compositions. Also disclosed are preferred concentrated compositions from which mildly acidic dilute liquid compositions can easily be obtained by adding an aqueous liquid.
The present invention also embodies a non-liquid formulation from which the liquid composition can be derived. The non-liquid formulation is essentially the liquid composition wherein the amount of the aqueous carrier liquid is reduced (e.g., gel) or essentially eliminated (e.g., granules).
In its method aspect, the present invention relates to a method for disinfecting and cleaning vinyl surfaces using the liquid compositions herein. In accordance with the method, the liquid compositions are applied to a vinyl surface, wiped with a porous material, and allowed to dry.
DETAILED DESCRIPTION OF THE INVENTION
Mildly acidic dilute and concentrated liquid compositions of the present invention comprise: 1) an amine oxide detergent surfactant, 2) an acidifying agent, 3) a quaternary ammonium disinfectant, 4) electrolytic disinfecting booster and 5) an aqueous carrier liquid. The liquid compositions can be used to clean hard surfaces in diluted or undiluted form. The diluted form is preferred because no rinsing is required. Rinsing is desirable if concentrated compositions are used on hard surfaces. To disinfect hard surfaces, the product must provide at least 500 to 600 ppm of quat. To sanitize the product must provide at least about 50 ppm quat, preferably at least 100 ppm quat.
A preferred concentrated composition of this invention comprises: about 1 to 25 parts amine oxide surfactants; about 2 to 16 parts quaternary ammonium chloride; optionals about 1-3 parts EDTA; about 0.2 to 2 parts phosphoric acid; about 0.2 to 2 potassium chloride; and balance water. The pH is preferably adjusted with HCl or phosphoric acid or mixtures thereof to a pH of from 3 to 6.
The liquid compositions can be used as no-rinse hard surface cleaners on floors, walls, toilets, etc. It was found that non-acidic liquid disinfecting and cleaning compositions containing amine oxides will stain vinyl surfaces. The liquid compositions of the present invention, however, will cause minimal or no vinyl staining. Moreover, the liquid compositions have excellent disinfecting and cleaning properties and will leave little or no visible residue when they dry.
The ppm as used herein are ppm by weight of ready to use liquid composition. Weight ppm and volume ppm are about the same since the concentrated compositions of this invention have specific gravities of about 1. Some concentrated compositions have specific gravities that vary slightly but they are considered within the scope of the claimed invention in view of this disclosure. The parts of the concentrates are by weight; but when diluted to provide the ready to use liquid cleaners, ppm by volume can be used to reflect the degree of dilution.
As used herein, “electrolytic disinfecting booster” is coined to mean any electrolytic chemical that will increase the disinfecting efficacy of the compositions of this invention.
As used herein, “mildly acidic” means a pH above about 3.0 and below 7.0. All pH values herein are measured in aqueous systems at 25° C. (77° F.).
As used herein, “vinyl” means material or surfaces containing polyvinyl chloride. Such material or surfaces can be waxed or unwaxed.
As used herein, “non-liquid” means gra
Barger Bruce
Wierenga Thomas James
Camp Jason J.
Delcotto Gregory
The Procter & Gamble & Company
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