Chitosan-containing antiperspirant cosmetic agents which are free of halides and/or hydroxy halides of aluminum and/or zirconium

Abstract

The invention relates to an antiperspirant cosmetic agent which includes at least one specific chitosan and which is free of aluminum-containing compounds, in particular free of halides and/or hydroxy halides of aluminum and/or zirconium. The present invention further relates to the use of a specific chitosan and to a non-therapeutic method for reducing body perspiration. Adding or using the at least one specific chitosan ensures that the sweat gland(s) is/are effectively influenced, thus resulting in a significant reduction in underarm perspiration even in the absence of antiperspirant aluminum-containing compounds.

What is claimed is: 
     
         1 . An antiperspirant cosmetic agent, comprising:
 a) at least one substance selected from the group consisting of: cosmetic oils that are liquid at 20° C. and 1,013 hPa, odorous substances, and waxes,   b) propellant in a total amount of 0 to 99 wt %, with respect to the total weight of the antiperspirant cosmetic agent, and   c) at least one chitosan having a viscosity of 15 to 15,000 mPa*s, wherein the chitosan has the formula (I),   
       
         
           
           
               
               
           
         
         wherein 
         x and z, independently of each other, represent integers from 5 to 25,000, 
         y represents integers from 1 to 25,000, 
         R represents an NH 2  group or *—NH 3   + CH 3 CH(OH)C(O)O −  or *—NH 3   + OHCH 2 C(O)O − , 
         with the stipulation that the sequence of the units contained in the square brackets and having the indices x, y, and z can be freely chosen and the residue R is bonded by means of *, and 
         d) no aluminum-containing compounds. 
       
     
     
         2 . The antiperspirant cosmetic agent according to  claim 1 , wherein y represents integers from 1 to 22,000 in formula (I). 
     
     
         3 . The antiperspirant cosmetic agent according to  claim 1 , wherein y represents integers, from 1 to 17,500, in formula (I). 
     
     
         4 . The antiperspirant cosmetic agent according to  claim 1 , wherein x and z, independently of each other, represent integers from 5 to 20,000 in formula (I). 
     
     
         5 . The antiperspirant cosmetic agent according to  claim 1 , wherein x and z, independently of each other, represent integers from 10 to 11,700, in formula (I). 
     
     
         6 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) has a degree of deacetylation of 70 to 99%. 
     
     
         7 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) has a degree of deacetylation of 80 to 90%. 
     
     
         8 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) has a viscosity of 15 to 10,000 mPa*s wherein the viscosity is determined by means of a Brookfield RVDV II+, spindle no. 2, at 20 rpm and at 20° C., and wherein 1 wt % of chitosan of formula (I) in a 1 wt % acetic acid solution, with respect to the total weight of the solution, is used to determine the viscosity. 
     
     
         9 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) has a viscosity of 15 to 5,000 mPa*s wherein the viscosity is determined by means of a Brookfield RVDV II+, spindle no. 2, at 20 rpm and at 20° C., and wherein 1 wt % of chitosan of formula (I) in a 1 wt % acetic acid solution, with respect to the total weight of the solution, is used to determine the viscosity. 
     
     
         10 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) is included in a total amount of 0.05 to 40 wt % with respect to the total weight of the propellant-free antiperspirant cosmetic agent. 
     
     
         11 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) is included in a total amount of 0.5 to 20 wt % with respect to the total weight of the propellant-free antiperspirant cosmetic agent. 
     
     
         12 . The antiperspirant cosmetic agent according to  claim 1 , wherein the at least one chitosan of formula (I) is included in a total amount of 0.2 to 30 wt % with respect to the total weight of the propellant-free antiperspirant cosmetic agent. 
     
     
         13 . A packaging unit (kit of parts), comprising—produced separate from each other—
 a) at least one first container (C1), containing a cosmetic agent (M1) comprising at least one antiperspirant active substance, and 
 b) at least one second container (C2), containing a cosmetic agent (M2) comprising at least one chitosan of formula (I), 
 
       
         
           
           
               
               
           
         
         wherein 
         x and z, independently of each other, represent integers from 5 to 25,000, 
         y represents integers from 1 to 25,000, 
         R represents an NH 2  group or *—NH 3   + CH 3 CH(OH)C(O)O −  or *—NH 3   + OHCH 2 C(O)O − , 
         with the stipulation that the sequence of the units contained in the square brackets and having the indices x, y, and z can be freely chosen and the residue R is bonded by means of *, and wherein the cosmetic agent (M2) includes no aluminum-containing compounds. 
       
     
     
         14 . A method for preventing and/or reducing the perspiration of the body, comprising applying the antiperspirant cosmetic agent to a skin of the axillae and leaving the cosmetic agent on the skin for at least 1 hour. according to  claim 1  particularly to the skin of the axillae, and remain on the skin of the axillae for at least 1 hour, preferably for at least 2 hours, more preferably for at least 4 hours, particularly for at least 6 hours.