Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-08-04
1999-09-21
Kopec, Mark
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510278, 510280, 510475, 510476, 510503, 510291, 510299, 510333, C11D 175, C11D 337, C11D 324, C11D 318
Patent
active
059554142
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to aqueous aerosol foam cleaning compositions, particularly for use on carpets and upholstery.
DISCLOSURE OF INVENTION
The invention is summarized as an aerosol foam-cleaning aqueous composition containing hydrocarbon propellant, foam-stabilizing polymer, surfactant, foam booster and a fluorinated stain-repellent, in which composition the proportions of the said components provide a foam of anti-flammability stability and sufficient residual amount of stain-repellent.
BRIEF DESCRIPTION OF DRAWINGS
FIGS. 1-4 are graphs of flammability and oil repellency data from the tests described, below, in the Modes of Carrying out the Invention.
MODES OF CARRYING OUT THE INVENTION
Aerosol foam compositions for shampooing floor-coverings such as carpets or soft furnishings such as upholstery commonly comprise blends of surfactants and foam-stabilizer polymers, together with various other ingredients such as solvents, corrosion inhibitors and fragrances. The polymer stabilizes the foam produced and assists in the cleaning. In an aerosol composition, a volatile hydrocarbon liquid propellant commonly is used to create a foam, the most commonly used propellant being butane.
A typical foam cleaning aerosol composition might comprise an aqueous dispersion of acrylic/styrene copolymer, sodium lauryl sulfate; ammonia; preservative and perfume, all in water; and a propane/butane blend as propellant. Such a composition would possess the following advantages:
The foam resulting from these aerosols has a stability dependent on the combination of the properties of the components, such as the amount of surfactant and the nature of the polymer and the other foaming agents. This stability will also affect the rate of release of butane or other hydrocarbon from the foam structure. Since the hydrocarbons, particularly butane, are very inflammable, this rate of release can influence the flammability properties of the foam structure and particularly the risk of ignition if the foam is applied close to an ignition source. However, the permissible amounts and the relative ratios of the components can usually vary widely and still provide otherwise operable compositions.
In U.S. Pat. No. 4,013,595 there is described a foam composition of the above type in which flammability is adjusted by addition of lauryl alcohol to a composition containing lauryl sulfosuccinate. In such compositions, stain blocking agents have been suggested including, for example, sulfonic acid condensates. A stain blocking agent interacts with the substrate being cleaned to prevent staining materials subsequently interacting with the substrate.
Applicant has also been considering the use of stain repellents, materials treating the substrate material by forming a coating. Such stain-repellents include fluoro stain repellents, particularly oil repellent components that provide a stain-repellent finish to the material being treated with a foam cleaner, the finish remaining after cleaning is completed. Particular stain repellents are fluorocompounds such as fluoropolymers. However, Applicant's attempts to combine these fluorocompounds with aerosol foam cleaning compositions have resulted in foams that are unstable and that release hydrocarbon at an excessive rate, giving rise to flammability problems.
It has now been found that non-volatile fluorocompound stain repellent compounds can be combined with the other components of a foam cleaning composition to provide a product that retains appropriate foam stability to provide a composition sufficiently non-flammable for use with improved safety even where there are potential ignition sources, such as open fires, cigarettes, and the like. These non-volatile fluorocompounds are added not as part of the propellant but as a part of the non-propellant portion of the cleaning composition. Fluorocompounds have been added to cleaning foams in the past, but those fluorocompounds were volatile compounds added as part of the propellant.
According to the invention there is provided an
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Brown Colin W.
Hart Gerald L.
Holmes David F.
Boyer Charles
Kopec Mark
S. C. Johnson & Son Inc.
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