Process for the preparation of stable polymer concentrates

Abstract

Process for preparing stable polymer concentrates, wherein acryloyldimethyltaurine and/or acryloyldimethyltaurate are free-radically polymerized with at least one further component in the presence of a polymerization medium, a higher-boiling solvent or solvent mixture is added to the resulting reaction product or reaction mixture, and the lower-boiling polymerization medium is removed, optionally under reduced pressure.

1 .- 10 . (canceled)  
   
   
       11 . A concentrate in liquid or liquid-disperse form, comprising 
 I) from 5 to 80% by weight of a polymer obtainable by free-radically polymerizing acryloyldimethyltaurine, acryloyldimethyltaurates or mixtures thereof [component A)] in the presence of one or more substances selected from one or more of the components D) to G). 
 D) consisting of at least monofunctional silicon-containing substances capable of free-radical polymerization.  
 E) consisting of at least monofunctional fluorine-containing substances capable of free-radical polymerization.  
 F) consisting of olefinically mono- or polyunsaturated optionally crosslinking macromonomers which each have at least one oxygen, nitrogen, sulfur or phosphorus atom and a number-average molecular weight greater than or equal to 200 g/mol, the macromonomers not being silicon-containing substances as per component D) or fluorine-containing substances as per component E), and  
 G) consisting of polymeric additives having number-average molecular weights of from 200 g/mol to 10 9  g/mol.  
   II) from 20 to 95% by weight of an organic solvent or solvent mixture,    III) from 0 to 60% by weight of an emulsifier, and    IV) from 0 to 30% by weight of water,    made in accordance with a process as claimed claim  1  comprising the steps of    a) polymerizing acryloyldimethyltaurine, acryloyldimethyltaurates or mixtures thereof in the presence of at least one substance or a plurality of substances selected from one or more of the components D) to G) by a free-radical polymerization reaction in a polymerization medium which behaves very substantially inertly with respect to free-radical polymerization reactions and permits the formation of high molecular weights.    b) adding a higher-boiling solvent or solvent mixture, to the mixture of polymer and polymerization medium obtained from step a), the boiling point of the higher-boiling solvent or solvent mixture added being at least 10° C. higher than that of the polymerization medium used for the polymerization, and    c) removing the polymerization medium.    
   
   
       12 . A cosmetic, pharmaceutical or dermatological preparation comprising a concentrate as claimed in  claim 11 .  
   
   
       13 . The preparation as claimed in  claim 12 , wherein the preparation is in the form of an oil-in-water emulsion.