Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Patent
1997-01-22
1998-07-07
Schofer, Joseph L.
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
A61K 600
Patent
active
057764743
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a skin and hair care product containing an agent acting cosmetically on hairs or skin, for example thioglycolic acid.
BACKGROUND OF THE INVENTION
Presently many skin and hair care products are known existing in different product forms and being applied to the object to be treated during the use. Thioglycolic acid acting through chemical reduction method is generally used for both waving of hair and straightening of a curly hair. The agent penetrates into the hair structure and brakes cystine (sulphur) bridges which has an essential effect on the shape of the hairs and then enables the setting of the hairs to a new shape. The. most used chemical is the ammonium salt of thioglycolic acid. In addition, other chemical substances are known, such as glycerol monothioglycolate, cysteine, 2- and 3-mercaptopropionic acid, 2mercaptoethylamine and ammonium or sodium sulphite, which all allow to achieve permanent waving of hair through reducing action. (Chemical and Physical Behavior of Human Hair, C.R. Robbins, Van Nostrand Reinhold Company).
The disadvantage of all these is as a rule the unpleasant odour caused by the mercaptans as well as their irritating effect when they occasionally enter the skin or mucous membrane. The skin irritation and odour are in some cases limiting factors to such an extent that people with a sensitive skin and allergy can not at all use cosmetic preparations containing these chemicals.
Further more, the above-mentioned preparations are sold as various liquid mixtures, which increases the transport costs. The use of these preparations requires in addition various dosing and protecting measures during the treatment, and when they are used according to the present practice, they cause additional waste load for example in effluents of hair dressing saloons.
SUMMARY OF THE INVENTION
By means of the present invention the above-mentioned odour disadvantages can be diminished considerably and the use of chemicals can be cut. Further, by means of this new technique excess chemicals can be either destroyed in a controlled manner or regenerated for new use. Moreover, the experiments have shown that the invention speeds up the actual permanent waving operation or any other skin or hair care operation, is more gentle to the hairs and does not much change permanent waving technique.
The product according to the present invention is mainly characterized in that it is of fibrous material having, the cosmetically acting;material absorbed therein, the absorbed material containing amino groups.
According to one advantageous;embodiment the fibrous material is cellulose based fiber containing polysilicic acid, preferably viscose fiber, where the active agent is bound through polysilicic acid.
According to some advantageous embodiments, the active agent is an ammonium salt of a compound,-reducing sulphur bridges of the hair structure, such as ammonium thioglycolate or thiolactate, when the product is used for permanent waving, or the, active agent is ammonium salicylate, when the product is used for the treatment of skin indurations.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to the present practice the hairdresser often uses a non-woven fabric as support paper when winding the hairs, whereafter the hairs are wet with the permanent waving chemical.
When using the invention, the hairdresser can now replace this non-woven fabric with the material according to the invention containing a ready-to-use agent. The advantage of the use of the material according to the invention is also that the chemical effect on sulphur bridges can be directed more accurately, which makes it possible to avoid unnecessary. skin contact and special. protecting measures. Besides making permanent waving, this is an advantage in the treatment of skin indurations.
The material containing amino groups shall be understood to mean in this context all active agents that contain amine nitrogen either linked covalently or as ammonium cation. Such materials can be
REFERENCES:
patent: 4786367 (1988-11-01), Bogart et al.
patent: 5121762 (1992-06-01), DiPinto et al.
Laurila Maija
Vapaaoksa Pekka
Carefibres Oy
Sarofin N.
Schofer Joseph L.
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