Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-11-15
2004-02-17
Ogden, Necholus (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S152000, C510S155000, C510S481000, C510S499000, C510S505000
Reexamination Certificate
active
06693066
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a toilet bar suitable for topical application for cleansing the human body, such as the skin and hair. In particular, it relates to a toilet bar composition producing a high rate and quantity of lather and that conveys excellent sensory properties.
2. The Related Art
Toilet bar skin cleaning properties are well known. An ideal bar composition not only cleans but provides a large quantity of lather and leaves the skin feeling comfortable. To accomplish this, a wide variety of additives have been suggested for inclusion in toilet bars. Some additives enhance the physical properties of the bar such as hardness and wear rate. Other additives enhance the in-use properties such as lather volume, creaminess, lather speed, and stability. Still other additives modify the skin feel both during and after use. Furthermore, consumers often seek a product that meets their specific needs. As a result, a single toilet bar product is not suitable or desirable for every consumer. At the same time, the bar manufacturer desires to reduce costs by minimizing the difference in toilet bar compositions it produces. To these ends, additives that modify the sensory properties at low concentration levels will provide significant advantages to providing varied products to consumers with products that meet the consumer's specific needs and at low cost.
In the past, polymer and high molecular weight additives have typically been used at low levels to modify the sensory properties of cleansing compositions such as shampoos, body washes, shower gels, hand washes. In toilet bars, however, polymer and high molecular weight additives have not been widely used because they frequently have a negative impact on bar feel (sand and grit), lather speed and lather volume. Surprisingly, Applicants have discovered that certain polymeric and low molecular weight amido amines and amido ammonium salts can provide excellent bar feel and lather properties while at the same time providing excellent skin feel when formulated into toilet bars.
U.S. Pat. No. 4,820,447; titled Mild Skin Cleansing Soap Bar With Hydrated Cationic Polymer Skin Conditioner; issued to R. F. Medcalf, Jr., et al. on Apr. 11, 1989 teaches the use of a hydrated cationic polymer in soap bars to improve their mildness. This specific class of polymers has been shown to provide the positive skin feel and mildness without compromising lather, provided that hydration of the polymer is adequate. Similarly, U.S. Pat. No. 4,673,525; titled Ultra Mild Skin Cleansing Composition; issued to L. E. Small, et al. on Jun. 16, 1987 teaches the use of polymeric skin feel additives. They also find that high levels of moisturizer are required. U.S. Pat. No. 4,946,618; titled Toilet Bar Composition Containing Cationic Guar Gum; issued to J. R. Knochel, et al. on Aug. 7, 1990 teaches the use of fast hydrating cationic guar gum (among other polymers) as a way of improving skin feel without enhancing grit. U.S. Pat. No. 5,312,559; titled Personal Cleanser With Moisturizer, issued to M. L. Kacher, et al. on May 17, 1994 teaches the use of various cationic additives in semi-solid compositions with high levels of water (40-70%). U.S. Pat. No. 5,338,541; titled Dual Cationic Terpolymers Providing Superior Conditioning Properties In Hair, Skin And Nail Care Products; issued to G. F. Matz, et al. on Aug. 16, 1994 teaches the use of acrylamide terpolymers having a MW>10,000. U.S. Pat. No. 6,001,788, titled Personal Use Soap Bar Compositions Containing Cationic Polymers, issued to R. J. Jaworski, et al. Feb. 14, 1999 teaches a method of incorporating an unhydrated cationic guar gum in soap bars, and discusses the need for quick hydration. U.S. Pat. No. 6,066,315, titled Ampholyte Polymers For Use In Personal Care Products, issued to A. L. Melby, et al. on May 23, 2000 teaches the use of various specific water soluble ampholytic polymers with high MW (>100,000) for treating keratin that are reportedly superior to previous polymers. U.S. Pat. No. 5,496,488, titled Cleansing Bar Composition Containing Petrolatum Having A Specific Size Range, issued to M. L. Kacher, et al. on Mar. 5, 1996 teaches the use of cationic polymers such as Polyquaternium 10 in bar compositions containing relatively high levels of water (e.g. 10-90% with 28% being exemplified). This patent discloses a method for hydrating polymers with high levels of water and thereby serves to minimize grit. Unfortunately, bars with such high levels of water are disadvantageous. Moreover, none of the above references disclose or suggest the conditioning compounds in the toilet bars of the present invention.
U.S. Pat. No. 6,057,275, titled Bars Comprising Benefit Agent And Cationic Polymer, issued to M. Fair, et al. on May 2, 2000 teaches specific ratios of cationic to surfactant compounds to enhance deposition. The ratios disclosed are in the range of 0.06:1 to 1:1. Conditioning compounds in the present invention are used at significantly lower comparative levels, i.e. in the ratio of conditioning compound to total surfactant compounds of about 0.05:1 to about 0.0001:1; preferably about 0.02:1 to about 0.0001:1. Furthermore, U.S. Pat. No. 6,057,275 discloses that the cationic conditioning compound must be fully hydrated prior to its addition to the bar.
The above mentioned prior art polymers and high molecular weight additives impart a positive moisturized skin feel that consumers appreciate. However, unlike the inventive additives, many of these polymers require substantial hydration and the net result is that such compounds have a negative impact on speed of lather and bar feel properties.
SUMMARY OF THE INVENTION
In one aspect the present invention is a toilet bar, having:
(a) about 0 to about 85% by wt. of a fatty acid soap;
(b) about 0 to about 65% by wt. of a non-soap anionic surfactant;
(c) about 0 to about 25% by wt. of water; and
(d) a conditioning compound of the following formula (I)
R
1
C(O)NH—R
2
—B(M) (I)
in which
R
1
C(O)NH— is a C6 to C22 alkyl amide radical, a C6 to C22 alkenyl amide radical, a C3 to C22 alkoxyl amide radical, or a C6 to C22 alkylaryl amide radical; either substituted or unsubstituted;
R
2
is a linking group selected from, a C1 to C10 alkyl group, a C3 to C10 alkenyl group, a C3 to C22 alkoxyl group, or a C6 to C22 alkylaryl group; either substituted or unsubstituted;
B is an amine or ammonium radical selected from the group of secondary alkyl amines or ammonium salts, secondary alkenyl amines or ammonium salts, secondary alkoxyl amines or ammonium salts, secondary alkanolamines or ammonium salts, secondary alkylaryl amines or ammonium salts, secondary cyclic amines or ammonium salts, heterocyclic amines or ammonium salts, and
M is an anion when B is an ammonium radical.
DETAILED DESCRIPTION OF THE INVENTION
In one aspect of the invention is a toilet bar, comprising:
(a) about 0 to about 85% by wt., preferably about 10 to about 80% by wt. of a fatty acid soap;
(b) about 0 to about 65% by wt., preferably about 5 to about 55% by wt. of a non-soap anionic surfactant;
(c) about 0 to about 25% by wt., preferably about 3 to about 20% by wt. of water; and
(d) a conditioning compound of the following formula (I)
R
1
C(O)NH—R
2
—B(M) (I)
in which:
R
1
C(O)NH— is a C6 to C22 alkyl amide radical, a C6 to C22 alkenyl amide radical, a C3 to C22 alkoxyl amide radical, or a C6 to C22 alkylaryl amide radical; either substituted or unsubstituted;
R
2
is a linking group selected from, a C1 to C10 alkyl group, a C3 to C10 alkenyl group, a C3 to C22 alkoxyl group, or a C6 to C22 alkylaryl group; either substituted or unsubstituted;
B is an amine or ammonium radical selected from the group of secondary alkyl amines or ammonium salts, secondary alkenyl amines or ammonium salts, secondary alkoxyl amines or ammonium salts, secondary alkanolamines or ammonium salts, secondary alkylaryl amines or ammonium salts, secondary cyclic amines or ammonium salts, heterocyclic amines or ammonium salts, prefera
Clarke Michael G.
Puvvada Sudhakar
Bornstein Alan A.
Ogden Necholus
Unilever Home & Personal Care USA , division of Conopco, Inc.
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