Compositions – Preservative agents – Anti-corrosion
Patent
1998-05-05
1998-12-29
Foelak, Morton
Compositions
Preservative agents
Anti-corrosion
8137, 252170, 252179, 252358, 521 50, 521 82, 521 85, 521 89, 521 97, B01D 1904
Patent
active
058536183
DESCRIPTION:
BRIEF SUMMARY
The present invention is concerned with foam, or mousse, as it is sometimes called.
Foam and mousse are known for use in a wide range of applications including shaving foam, hair mousse, cleaning products including hard surface cleaners for kitchen, bathroom surfaces and windows, carpets, upholstery etc. A review of known applications is given in Cosmetics and Toiletries.RTM. magazine, Vol. 110, June 1995, pages 50 to 53: "The Aerosol Mousse" by J. Mufti.
The prior art foams are not in general intended to be dissolved in water in order to produce an aqueous solution, suspension or emulsion.
The present invention aims to provide a foam which can be conveniently dosed and dissolved, suspended or emulsified in water.
SUMMARY OF THE INVENTION
The object of the present invention is achieved by a foam having a bulk density of less than 250 g/l; the foam having a stability in air of at least 15 seconds (and preferably at least 30 seconds), the stability being defined as the time for the foam to collapse to half its volume when measured in a 111 mm internal diameter and 62 mm internal height glass beaker; wherein the foam has a stability on water at 20.degree. C. of less than 2 hours, the stability on water being defined as the time taken for a 150 ml foam mass on the surface of 450 ml distilled water in a 111 mm internal diameter and 62 mm internal height glass beaker, to collapse to reveal a 2 cm diameter area of the water surface which is substantially free from foam.
It is preferred that the foam has a stability on water at 20.degree. C. of less than 1 hour, preferably less than 30 minutes, and more preferably less than 10 minutes.
For cleaning applications it is further preferred that the foam comprises at least 5%, and more preferably at least 18% by weight of surfactant.
Further aspects of the present invention are preparing a wash liquor by dissolving, suspending or emulsifying the foam described above in water, and using the wash liquor to clean textile fabrics.
DETAILED DESCRIPTION OF THE INVENTION
Foam is a coarse dispersion of gas in a relatively small amount of liquid. The foams of the present invention are a continuous liquid phase comprising a composition, and a dispersed phase comprising a gas. Typically, the gas "bubbles" of the dispersed phase can vary in size from 50 micrometers to several millimeters.
In general, the quality of the foam is determined by assessing various foam quality attributes, such as: 1) the appearance of the foam as it is determined by the uniformity of the bubble size distribution, as well as by the actual bubble sizes, wherein small and uniformly sized bubbles are generally preferred; 2) the thickness of the foam as it is determined by the apparent foam viscosity, wherein a greater apparent foam viscosity is generally preferred; 3) the density of the foam which is preferably less than 250 g/l, more preferably less than 150 g/l, and most preferably less than 100 g/l; 4) the drainage of the liquid from the foam in air upon standing on a solid surface, wherein slow of drainage of the liquid is generally preferred; and 5) the rate at which the foam composition is dissolved, suspended or emulsified in water. For the purposes of the present invention a rapid rate of dissolving, suspending or emulsifying the foam composition in water is an essential feature.
Foam stabilising agents may also be employed in the compositions of the present invention to increase foam stability in air. Especially preferred are alyphatic alcohols such as straight chain saturated alcohols of 12 to 18 carbon atoms e.g. cetyl alcohol, stearyl alcohol, myristyl alcohol and mixtures thereof. Polymers including polyvinylpyrrolidone, polyvinyl alcohol, polyacrylamide, polypeptides, polysaccharides, cellulose derivatives; and also natural and synthetic gums and resins such as guar gum, xantham gum, carageenan, sodium alginate and caseinate may also be used in the present invention.
In one aspect of the present invention, the foam is dispensed from a package which comprises a sealed container, such as an
REFERENCES:
patent: 5002695 (1991-03-01), Schulz
Barker Catherine Louise
Etesse Patrick Jean-Fran.cedilla.ois
Vega Jose Louis
Verbiest Jan Hendrik Maria
Foelak Morton
Goodrich D. M.
Patel K. K.
Rasser J. C.
The Procter & Gamble & Company
LandOfFree
Foam does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Foam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Foam will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1420885