Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Polymer containing
Reexamination Certificate
2000-02-02
2002-02-26
Page, Thurman K. (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Polymer containing
C424S070100, C424S070110, C424S070130, C424S070210, C424S070220, C510S119000, C510S122000
Reexamination Certificate
active
06350441
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to hair conditioning shampoo compositions containing a combination of conditioning agents including emulsified silicones, cationic polymers and certain fatty acid polyesters of polyols.
BACKGROUND AND PRIOR ART
The use of conditioning agents in hair shampoo formulations is well known and widely documented. A variety of conditioning agents have been described in this context, the principal classes of such agents being silicones, cationic polymers and oily materials such as hydrocarbons, higher alcohols, fatty acid esters, glycerides and fatty acids.
Fatty acid polyesters of cyclic polyols and/or sugar derivatives have been described as a component of hair conditioning formulations in the following documents:
W098/04241 discloses that a conditioning system comprising a mixture of polyol carboxylic acid ester and particular nonionic water-soluble polymers is valuable in shampoo compositions for the delivery of improved hair feel and manageability. Cationic cellulose derivative polymer materials may be included in the compositions as optional ingredients.
W096/37594 discloses a mild, foam producing personal cleansing composition with good skin feel attributes which is based on a combination of an oil dispersing nonionic surfactant and dispersed oil phase which is a mixture of a liquid polyol fatty acid polyester and the second oil component comprising one or more non-polar oils preferably selected from mineral oil, petrolatum, water-insoluble silicones, soya bean oils and mixtures thereof. The use of this mixed oil system is said to deliver improved skin feel.
W098/04240 describes a shampoo composition containing a particular surfactant base of short chain alkyl sulphate and alkyl ethoxy sulphate in combination with a conditioning system comprising an insoluble oil conditioning agent selected from silicone materials, liquid polyol carboxylic acid esters and mixtures thereof.
JP-A-10/077,215 describes a cosmetic material consisting of saccharide fatty acid ester and one or more siloxanes selected from methyl polysiloxane, methyl phenyl siloxane and methyl polycyclosiloxane. The composition is said to provide good combing and feel after washing when used as a hair rinse or treatment.
A problem encountered with conditioning shampoo formulations is that the conditioning performance may be insufficient for many people, particularly in regions such as Japan and South East Asia where consumers desire a high level of conditioning and a “weighty” feel to their hair. Simply raising the level of conditioning agent in the formulation is not a satisfactory solution, since some conditioning agents tend to build up on the hair and be difficult to rinse off at high levels, leading to an undesirably slimy or coated feel.
To enhance conditioning efficacy, various combinations of conditioning ingredients in shampoo formulations have been proposed as follows:
Cationic polymers have been described for the enhancement of the deposition of silicone from a cleansing shampoo base in EP 0 432 951 and EP 0 529 883.
WO 93/08787 describes a tri-component conditioning system for delivery from shampoo composed of insoluble silicone, cationic polymer of specified charge density and an oily liquid for providing shine and lustre to the hair which is preferably selected from, inter alia, hydrocarbon oils such as paraffin oil and mineral oil, and alkyl/alkenyl esters of fatty acids such as isopropyl isostearate and isocetyl stearoyl stearate.
The present inventors have found that a specific combination of conditioning agents: emulsified silicones, cationic polymers and fatty acid polyesters of cyclic polyols and/or sugar derivatives, gives surprisingly improved overall conditioning compared to the various binary combinations of those individual ingredients which are disclosed in the prior art.
Furthermore, hair softness is particularly improved.
The compositions of the invention also have particular utility in the treatment of hair which has been damaged, e.g. through environmental exposure or harsh mechanical or chemical treatments such as heat styling, perming or bleaching. In such cases, the benefits of softness and ease of combing provided by compositions of the present invention are especially apparent.
SUMMARY OF THE INVENTION
The present invention provides an aqueous shampoo composition comprising, in addition to water:
i) at least one cleansing surfactant chosen from anionic, zwitterionic and amphoteric surfactants or mixtures thereof, and
ii) a combination of conditioning agents including:
(a) emulsified particles of an insoluble silicone;
(b) a cationic polymer, and
(c) a fatty acid polyester of a polyol selected from cyclic polyols, sugar derivatives and mixtures thereof.
DETAILED DESCRIPTION AND PREFERRED EMBODIMENTS
Cleansing Surfactant
Shampoo compositions according to the invention will comprise one or more cleansing surfactants which are cosmetically acceptable and suitable for topical application to the hair. Further surfactants may be present as an additional ingredient if sufficient for cleansing purposes is not provided as emulsifying agent for the oily or hydrophobic components (such as silicones) present in the shampoo.
It is preferred that shampoo compositions of the invention comprise at least one further surfactant (in addition to that used as emulsifying agent) to provide a cleansing benefit.
Suitable cleansing surfactants, which may be used singularly or in combination, are selected from anionic, amphoteric and zwitterionic surfactants, cationic surfactants, and mixtures thereof. The cleansing surfactant may be the same surfactant as the emulsifier, or may be different. Preferred cleansing surfactants are selected from anionic, amphoteric and zwitterionic surfactants, and mixtures thereof.
Examples of anionic surfactants are the alkyl sulphates, alkyl ether sulphates, alkaryl sulphonates, alkanoyl isethionates, alkyl succinates, alkyl sulphosuccinates, N-alkyl sarcosinates, alkyl phosphates, alkyl ether phosphates, alkyl ether carboxylates, and alpha-olefin sulphonates, especially their sodium, magnesium, ammonium and mono-, di- and triethanolamine salts. The alkyl and acyl groups generally contain from 8 to 18 carbon atoms and may be unsaturated. The alkyl ether sulphates, alkyl ether phosphates and alkyl ether carboxylates may contain from 1 to 10 ethylene oxide or propylene oxide units per molecule.
Typical anionic surfactants for use in shampoos of the invention include sodium oleyl succinate, ammonium lauryl sulphosuccinate, ammonium lauryl sulphate, sodium dodecylbenzene sulphonate, triethanolamine dodecylbenzene sulphonate, sodium cocoyl isethionate, sodium lauryl isethionate and sodium N-lauryl sarcosinate. The most preferred anionic surfactants are sodium lauryl sulphate, triethanolamine monolauryl phosphate, sodium lauryl ether sulphate 1 EO, 2EO and 3EO, ammonium lauryl sulphate and ammonium lauryl ether sulphate 1EO, 2EO and 3EO.
Examples of amphoteric and zwitterionic surfactants include alkyl amine oxides, alkyl betaines, alkyl amidopropyl betaines, alkyl sulphobetaines (sultaines), alkyl glycinates, alkyl carboxyglycinates, alkyl amphopropionates, alkylamphoglycinates, alkyl amidopropyl hydroxysultaines, acyl taurates and acyl glutamates, wherein the alkyl and acyl groups have from 8 to 19 carbon atoms. Typical amphoteric and zwitterionic surfactants for use in shampoos of the invention include lauryl amine oxide, cocodimethyl sulphopropyl betaine and preferably lauryl betaine, cocamidopropyl betaine and sodium cocamphopropionate.
The shampoo composition can also include co-surfactants, to help impart aesthetic, physical or cleansing properties to the composition. A preferred example is a nonionic surfactant, which can be included in an amount ranging from 0% to about 5% by weight based on total weight.
For example, representative nonionic surfactants that can be included in shampoo compositions of the invention include condensation products of aliphatic (C
8
-C
18
) primary or secondary linear or branched chain alcohols or phen
Ellis Frances Ann
Giles Colin Christopher David
Murray Andrew Malcolm
Pearce Matthew Leslie
Red Pamela Eileen
Boxer Matthew
Page Thurman K.
Seidleck Brian K.
Unilever Home & Personal Care USA , division of Conopco, Inc.
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