Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions
Reexamination Certificate
1999-08-06
2001-07-03
Bawa, Raj (Department: 1615)
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
C424S070130, C424S070220, C424S401000, C424S070190
Reexamination Certificate
active
06254859
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to conditioning compositions for skin and hair. More specifically, it relates to skin and hair conditioning compositions containing sucroglyceride conditioning agents, hair conditioners and hair conditioning shampoos.
2. Description of the Related Art
Human hair becomes soiled due to its contact with the surrounding atmosphere and, to a greater extent, from sebum secreted by the head. The build-up of sebum causes the hair to have a dirty feel and an unattractive appearance. The soiling of the hair necessitates it being shampooed with frequent regularity.
Shampooing the hair cleans by removing excess soil and sebum. However, the shampooing process had disadvantages in that the hair can be left in a wet, tangled and generally unmanageably state. Shampooing can also result in the hair becoming dry or “frizzy” due to the removal of natural oils or other hair moisturizing materials. After shampooing, the hair can also suffer from a perceived loss of “softness”. Softness, of course, is a generally desirable attribute for many users of shampoo products. A variety of approaches have been developed to alleviate the after-shampoo problems. These range from the use of after-shampoo conditioning treatment, i.e., hair-rinses, to the inclusion of hair conditioners into the shampoo compositions themselves, i.e., conditioning shampoos.
Hair rinses typically work by depositing a polymeric film, cationic hair conditioning surfactant, or other material onto the hair. However, such compositions, due to a variety of problems, have not been fully satisfactory. For example, hair rinses are generally liquid in nature and must be applied in a separate step following the shampooing, left on the hair for a length of time, and rinsed with fresh water. This, of course, is time consuming and is not inconvenient.
Conditioning shampoos containing cationic conditioning agents have been disclosed in, for example, EP 018 717. These cationic agents confer some conditioning benefit on hair, but are often thought to leave a residue on the hair, which may cause dulling of hair after drying.
Non-volatile silicone oils are useful as conditioning agents. However, the use of such oils is associated with some difficulties. A particularly difficult problem encountered with shampoos containing such oils is maintaining the insoluble silicone oil stably suspended. A variety of materials have been proposed for use in silicone-containing shampoos to thicken and stabilize the shampoo. These materials include, for example, xanthan gum, long chain acyl derivatives, long chain amine oxides, and long chain alkanolamides. These materials are disclosed in U.S. Pat. Nos. 4,788,006, 4,704,272, and 4,741,885. In addition, excessive amounts of silicone can dull hair, and buildup of silicone on the hair can give a greasy appearance. Furthermore, incorporation of silicone oils generally yields a foam suppressing effect. Accordingly, there exists a need for conditioning agents capable of overcoming these problems.
SUMMARY OF THE INVENTION
The present invention provides cleaning and conditioning formulations for human skin and hair comprising a sucroglyceride composition in a base formulation. Thus, the invention encompasses conditioning shampoos and various personal care formulations. Representative compositions include, for example, facial cleansers, bubble bath and gel, bar and liquid soaps, shaving creams, and antidandruff shampoos. It further encompasses other cleaning compositions containing a surfactant or detergent base. Representative of these other cleaning compositions are light duty dishwashing liquids.
The invention also provides methods for conditioning human hair or skin comprising contacting human hair or skin with an effective conditioning amount of a sucroglyceride composition.
The sucroglyceride compositions suitable for use in the invention are anionic in character, i.e., they include an anionic component together with noionic components. The sucroglycerides of the invention typically comprise sucrose monoesters, slats of the aliphatic fatty acids derived from the triglyceride (soaps), sucrose, monoglycerides, glycerin, and a mixture of diglycerides and triglycerides.
The inventive compositions enjoy a variety of advantages over known conditioning agents. Sucroglycerides are derived from natural sources, non-toxic, and readily biodegradable. In addition, they are odorless, tasteless and mild to human skin. Sucroglycerides are non-sensitizing; they are non-allergenic and do not cause skin irritation. Further, sucroglycerides function as excellent emulsifiers for a wide range of oils. In addition, they are self-emulsifying and self-suspending. Further, the can be easily combined with conventional anionic, cationic, and nonionic surfactants to provide many different conditioning formulations. Further, sucroglycerides do not suppress foam produced by surfactants and do not cause build-up on hair. The sucroglycerides also provide a temporary pearlescent effect to shampoos and other detergent based personal care compositions.
The sucroglycerides of invention comprise a mixture of products resulting from the reaction between sucrose and a triglyceride. The sucroglycerides of the invention may optionally be prepared by mixing the required amount of each of the components required to achieve a specific sucroglyceride composition.
DETAILED DESCRIPTION OF THE INVENTION
Unless otherwise indicated, the amounts of all components described herein are indicated in percent by weight.
As used herein, the term “sucroglyceride” or “sucrose glyceride” means a mixture of products (1) obtained directly from the transesterification between sucrose and natural or synthetic triglycerides; this mixture contains monoglycerides. diglycerides, unaltered triglycerides, sucrose esters and soaps; or (2) obtained by combining predetermined amounts of sucrose, sucrose esters, glycerin, monoglyceride, di- and triglycerides, and soap (salts of fatty acids).
As used herein, “triglyceride” means one or more triglyceride(s) of saturated or unsaturated aliphatic fatty acids having at least 8 carbon atoms, preferably 8-22 carbon atoms, and more preferably from 8 to 18 carbon atoms. Although synthetic triglycerides can be obtained from a reaction of glycerol and fatty acid, it is preferable to use naturally occurring triglycerides, i.e., mixtures of triglycerides.
By “build-up”, as used herein, is meant a greasy or oily feel and/or appearance on hair caused by deposition on hair of successive layers of conditioning agents, such as cationic polymers, cationic surfactants, silicone oils or combinations of thereof.
Representative naturally occurring triglycerides include, for example, lard, tallow, peanut oil, butter oil, cottonseed oil, linseed oil, coconut oil, olive oil, palm oil, grapeseed oil, fish oil, soybean oil, castor oil, copra oil, rapeseed oil, tall oil, sunflower oil, sorghum oil, sesame oil, safflower oil, palm kernel oil, linseed oil, and corn oil.
Preferred sucroglycerides for use in the invention include sucroglycerides derived form cottonseed oil, palm oil, and tallows. The sucroglycerides suitable for use in the invention are predominately nonionic and include an anionic component in addition to the nonionic components. The anionic component is typically soap or soaps, i.e., salts of the fatty acids derived from the triglyceride. Preferred sucroglycerides for use in the invention are those capable fo providing a conditioning effect to human hair or skin (the substrate) when allowed to contact the substrate. When such sucroglycerides contact the substrate, they are deposited on the substrate whereby they provide a “conditioned feel” to the substrate. This conditioned feed is apparent, for example, during wet and dry combing of human hair. It is also observed as a smooth or silky after-feel on skin or hair.
The sucroglycerides of the invention typically are in the state of a solid, semi-solid, or paste depending on the composition and triglyceride chain length. Thu
Shapiro Irene
Tseitlina Galina
Bawa Raj
McDonnell & Boehnen Hulbert & Berghoff
Stepan Company
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