Bleaching and dyeing; fluid treatment and chemical modification – Cleaning or laundering
Reexamination Certificate
2001-03-30
2002-12-10
Gupta, Yogendra N. (Department: 1751)
Bleaching and dyeing; fluid treatment and chemical modification
Cleaning or laundering
C510S102000, C510S276000, C510S337000, C510S413000, C510S414000, C510S421000, C510S426000, C510S440000, C510S444000, C510S447000, C134S042000
Reexamination Certificate
active
06491728
ABSTRACT:
FIELD OF THE INVENTION
The present invention generally relates to detergent compositions containing efficient enduring perfumes. These compositions contain naturally, and/or synthetically, derived perfumes which are substantive to fabrics. These compositions provide better perfume deposition on treated fabric, thus minimizing the perfume lost during the laundry processes. The detergent compositions of the invention can be formulated as liquids, granules, or laundry bar compositions.
BACKGROUND OF THE INVENTION
Perfume in cleaning products provides olfactory aesthetic benefit and serves as a signal of cleanliness. These are especially important functions of these products. Continuous efforts are made to find improvements in both delivery effectiveness and longevity on fabrics. During a cleaning process, a substantial amount of perfume is lost with the wash water and/or with the rinse water and/or in the subsequent drying. It is extremely important that any perfume provide the maximum effect with the minimum amount of material, and that the material be as safe and non-irritating as possible.
People skilled in the perfume art, usually by experience, have some knowledge of some particular perfume ingredients that are “substantive” and/or non-irritating. Substantive perfume ingredients are those odorous compounds that effectively deposit on fabrics in the cleaning process and are detectable on the subsequently dried fabrics by people with normal olfactory acuity. The knowledge of what perfume ingredients are substantive is spotty and incomplete.
The object of this invention is to provide cleaning compositions containing enduring perfumes which are effectively retained and remain on the laundry for a long lasting aesthetic benefit with minimum amount of material, and not lost and/or wasted in the cleaning, rinsing, and/or drying steps. It is also an object to provide perfumes that are non-irritating insofar as that is possible.
SUMMARY OF THE INVENTION
The present invention relates to laundry detergent compositions comprising perfumes that provide a long lasting aesthetic benefit with a minimum amount of material (“enduring perfume”). In its broadest aspect, the present invention is directed to a detergent composition containing an effective amount of an enduring perfume composition as defined herein, together with a surfactant system which provides detergent benefits. Numerous perfume formulations suitable for use in the detergent of the invention can be prepared from known perfume or fragrance ingredients as disclosed hereinafter.
As used herein, all percentages, ratios and proportions are by weight, unless otherwise specified and all numerical values are approximations. All documents including patents and publications cited herein are incorporated herein by reference.
The invention comprises detergent compositions containing enduring perfume and a method of laundering soiled fabrics. The method comprises the step of contacting the soiled fabrics with an aqueous medium containing an effective amount of a detergent composition as described herein. In various embodiments of the invention, granules, liquids, and laundry bar compositions suitable for handwashing soiled fabrics are provided.
DETAILED DESCRIPTION OF THE INVENTION
The present invention especially relates to detergent compositions preferably comprising, by weight of the composition:
(A) from about 0.001% to about 10%, preferably from about 0.005% to about 5%, more preferably from about 0.01% to about 3%, by weight of an enduring perfume composition and
(B) from about 0.01% to about 95%, preferably from about 5% to about 85%, more preferably from about 3% to about 30%, and even more preferably from about 5% to about 22%, of a surfactant system.
A. Enduring Perfume Composition
Laundry detergent compositions in the art commonly contain perfumes to provide a good odor to the atmosphere during the laundry process and, especially, to the clean laundry. These conventional perfume compositions are normally selected mainly for their odor quality, with some consideration of substantivity.
Enduring perfume ingredients, as disclosed herein, can be formulated into laundry detergent compositions and are substantially deposited and remain on the laundry throughout any rinse and/or drying steps. These enduring perfume ingredients minimize the material wasted, while still providing the good aesthetics that the consumers value.
An enduring perfume ingredient is characterized by its boiling point (B.P.) and its octanol/water partitioning coefficient (P). The octanol/water partitioning coefficient of a perfume ingredient is the ratio between its equilibrium concentrations in octanol and in water. The perfume ingredients of this invention have a B.P., measured at the normal, standard pressure, of about 250° C. or higher, preferably more than about 260° C.; and an octanol/water partitioning coefficient P of about 1,000 or higher. Since the partitioning coefficients of the perfume ingredients of this invention have high values, they are more conveniently given in the form of their logarithm to the base 10, logP. Thus the perfume ingredients of this invention have logP of about 3 or higher, preferably more than about 3. 1, and even more preferably more than about 3.2.
The boiling points of many perfume ingredients are given in, e.g., “Perfume and Flavor Chemicals (Aroma Chemicals),” Steffen Arctander, published by the author, 1969, incorporated herein by reference.
The logP of many perfume ingredients has been reported; for example, the Pomona92 database, available from Daylight Chemical Information Systems, Inc. (Daylight CIS), Irvine, California, contains many, along with citations to the original literature. However, the logP values are most conveniently calculated by the “CLOGP” program, also available from Daylight CIS. This program also lists experimental logP values when they are available in the Pomona92 database. The “calculated logP” (ClogP) is determined by the fragment approach of Hansch and Leo ( cf., A. Leo, in Comprehensive Medicinal Chemistry, Vol. 4, C. Hansch, P. G. Sammens, J. B. Taylor and C. A. Ramsden, Eds., p. 295, Pergamon Press, 1990, incorporated herein by reference). The fragment approach is based on the chemical structure of each perfume ingredient, and takes into account the numbers and types of atoms, the atom connectivity, and chemical bonding. The ClogP values, which are the most reliable and widely used estimates for this physicochemical property, are preferably used instead of the experimental logP values in the selection of perfume ingredients which are useful in the present invention.
Thus, when a perfume composition which is composed of ingredients having a B.P. of about 250° C. or higher and a ClogP, or an experimental logP, of about 3 or higher, is used in a laundry detergent composition, the perfume is very effectively deposited on fabric, and remains substantive after the rinsing and drying steps. Also, surprisingly, these same perfume compositions are very mild to skin and are relatively non-irritating.
Table 1 gives some non-limiting examples of enduring perfume ingredients, useful in laundry detergent compositions of the present invention. The enduring perfume compositions of the present invention contain at least about 3 different enduring perfume ingredients, more preferably at least about 4 different enduring perfume ingredients, and even more preferably at least about 5 different enduring perfume ingredients. Furthermore, the enduring perfume compositions of the present invention contain at least about 70 wt, % of enduring perfume ingredients, preferably at least about 75 wt, % of enduring perfume ingredients, more preferably at least about 80 wt, % of enduring perfume ingredients, and even more preferably at least about 85 wt, % of enduring perfume ingredients. Laundry detergent compositions of the present invention contain from about 0.001% to about 10%, preferably from about 0.005% to about 5%, more preferably from about 0.01% to about 3%, and even more preferably from about 0.02% to about 2%,
Bacon Dennis Ray
Trinh Toan
Camp Jason
Cook C. Brant
Gupta Yogendra N.
Miller Steve W.
Mruk Brian P.
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