Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2000-04-04
2002-01-01
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...
C510S119000, C510S127000, C510S130000, C510S328000
Reexamination Certificate
active
06335312
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to personal cleansing products which include mid-chain branched surfactants.
BACKGROUND OF THE INVENTION
The developer and formulator of surfactants for personal cleansing detergents must consider a wide variety of possibilities with limited (sometimes inconsistent) information, and then strive to provide overall improvements in one or more of a whole array of criteria, including performance in the presence of free calcium, in complex mixtures of surfactants and polymers, formulation changes including silicone conditioners, enzyme, various changes in consumer habits and practices, and the need for biodegradability. Furthermore, personal cleansing detergents should also employ materials that enhance product phase stability at low temperatures. Lack of phase stability can lead to unacceptable Theological and aesthetic properties as well as to performance issues. Such low temperatures can be encountered in warehouses, in the consumer's garage, in the consumer's automobile, during street vending, on a cold bathroom window sill, and the like.
Further, personal cleansing compositions should employ materials that enhance the dissolution, or rate of product mixing, with water. Further, personal cleansing detergents should employ materials that enhance the tolerance of the system to hardness, especially to avoid the precipitation of the calcium salts of anionic surfactants. Precipitation of the calcium salts of anionic surfactants is known to cause suppression of suds, irritation to the skin, and can lead to an undesirable hair feel. The lack of tolerance to low temperature and hardness prevents widespread use of personal cleansing products in which sodium alkyl sulfate is the only anionic surfactant.
The development of improved surfactants for use in personal cleansing compositions is clearly a complex challenge.
It is an aspect of the present invention to provide mixtures of the mid-chain branched primary alkyl surfactants which are formulatable with other surfactants to provide personal cleansing compositions having one or more advantages, including greater product stability at low temperatures, increased resistance to water hardness, greater efficacy in surfactant systems, improved removal of greasy or particulate body soils, lower deposition levels on the hair and skin with subsequent improvement in feel and mildness, and the like.
BACKGROUND ART
U.S. Pat. No. 3,480,556, EP 439,316, EP 684,300, EP 439,316, U.S. Pat. No. 3,480,556, R. G. Laughlin in “The Aqueous Phase Behavior of Surfactants”, Academic Press, N.Y. (1994), Finger et al., “Detergent alcohols—the effect of alcohol structure and molecular weight on surfactant properties”, J Amer. Oil Chemists' Society, Vol. 44, Technical Bulletin, Shell Chemical Co., SC: 364-80, EP 342,917 A, U.S. Pat. No. 4,102,823, GB 1,399,966, G.B. Patent 1,299,966, EP 401,462 A, K. R. Wormuth and S. Zushma, Langmuir, Vol. 7, (1991), pp 2048-2053, R. Varadaraj et al., J. Phys. Chem., Vol. 95, (1991), pp 1671-1676, Varadtraj et al., J. Colloid and terface Sci., Vol. 140, (1990), pp 31-34, Varadaraj7 et al., Langmuir, Vol. 6 (1990), pp 1376-1378, U.S. Pat. No. 5,284,989, U.S. Pat. No. 5,026,933, U.S. Pat. No. 4,870,038, Surfactant Science Series, Marcel Dekker, N.Y., CEH Marketing Research Report “Detergent Alcohols” by R. F. Modler et al., Chemical Economics Handbook, 1993, 609.5000-609.5002; Kirk Qtllmer's Encyclopedia of Chemical Technology, 4th Edition, Wiley, New York, 1991, “Alcohols, Higher Aliphatic” in Vol. 1, pp 865-913 and references therein.
SUMMARY OF THE INVENTION
The present invention provides a personal cleansing compositions comprising a mid-chain branched surfactants and a conventional personal cleansing adjutant.
Specifically, the present invention comprises a personal cleansing composition comprising:
i) from about 0.001% to about 49.9% by weight of a conventional personal cleansing additive;
ii) from a bout 0.1% to about 49.999% by weight of a surfactant system comprising a branched surfactant mixture, said branched surfactant mixture comprising mid-chain branched and linear surfactant compounds, said linear compounds less than about 25% by weight of the branched surfactant., mixture;
wherein the mid-chain branched surfactant compounds are of the formula:
A
b
−B
wherein:
A
b
is a hydrophobic moiety having from about 10 to about 18 total carbons divided between a longest chain and at least one short chain, the longest chain being in the range of from about 9 to about 17 carbon atoms, there being one or more C
1
-C
3
alkyl moieties branching from the longest chain, provided that at least one of the branching alkyl moieties is attached directly to a carbon of the longest linear carbon chain at a position within the range of position 3 carbon, counting from carbon #1 which is attached to the —B moiety, to position &ohgr;—2 carbon, wherein co is the terminal carbon;
B is a hydrophilic moiety selected from the group consisting of OSO
3
M, (EO/PO)mOH, EO/PO)mOSO
3
M and mixtures thereof, wherein EO/PO are alkoxy moieties selected from the group consisting of ethoxy, propoxy, and mixtures thereof, wherein m is at least about 1 to about 30 and M is hydrogen or a salt forming cation;
provided that the average total number of carbon atoms in the A
b
moiety in the branched surfactant mixture is within the range of about 12 to 14.5; and
(iii) from about 50% to about 99.899%, by weight of an aqueous liquid carrier.
In a second embodiment the present invention also includes an antidandruff shampoo comprising a branched surfactant system, hereinbefore defined; from about 0.1% to about 5% by weight of an antidandruff agent selected from the group consisting of type (a), type (b), both of are defined hereinafter, and mixtures thereof; and from about 50% to about 99.89%, by weight of an aqueous liquid carrier;
In a third embodiment the present invention also includes a personal cleansing composition comprising a branched surfactant system, hereinbefore defined; from about 0.005% to about 20% by weight of a conditioning agent selected from the group consisting of nonvolatile hydrocarbon conditioning agents. nonvolatile silicone conditioning agents and mixtures thereof; from about 50% to about 99.89%, by weight of an aqueous liquid carrier; and from about 0.1% to about 10%, by weight of a suspending agent.
In a fourth embodiment the present invention also includes a personal cleansing composition comprising a branched surfactant system, hereinbefore defined; from about 0.1% to about 10% by weight of a water insoluble hair styling polymer; from about 50% to about 99.849%, by weight of an aqueous liquid carrier; and from about 0.1% to about 10%, by weight of a volatile water insoluble solvent.
In a fifth embodiment the present invention also includes a personal cleansing composition comprising a branched surfactant system, hereinbefore defined; from about 0.01% to about 5% by weight of a deposition polymer; and from about 50% to about 99.89%, by weight of an aqueous liquid carrier;
In a sixth embodiment the present invention also includes a personal cleansing composition comprising a branched surfactant system, hereinbefore defined; from about 0.1% to about 10% by weight of a dispersed phase polymer; and from about 50% to about 99.89%, by weight of an aqueous liquid carrier;
In a seventh embodiment the present invention also includes a method of treating hair by administering a safe and effective amount of a personal cleansing composition as hereinbefore defined.
In an eight embodiment the present invention also includes a method of treating skin by administering a safe and effective amount of a personal cleansing composition as hereinbefore defined.
In a ninth embodiment the present invention also includes a method of cleaning hair and skin by administering a safe and effective amount of a personal cleansing composition as hereinbefore defined.
These and other aspects, features and advantages will be apparent from the following description and the appended clai
Coffindaffer Timothy Woodrow
Connor Daniel Stedman
Cripe Thomas Anthony
Lanzalaco Anthony Charles
Stidham Robert Emerson
Cook C. Brant
Ogden Necholus
Robinson Ian S.
The Procter & Gamble & Company
William Zerby Kim
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