Curable organic polymer comprising at least one acylurea unit, its preparation and use

Abstract

Moreover, the present invention suggests a process for the preparation of said polymer and the use of said curable organic polymer for the preparation of a cured composition and for the preparation of hydroxyurethanes.

1 . A curable organic polymer comprising at least one acylurea unit represented by structural formula (I): 
       
         
           
           
               
               
           
         
       
     
     
         2 . The polymer of  claim 1 , comprising 3 to 12 acylurea units. 
     
     
         3 . The polymer of  claim 1 , characterized in that the polymer is represented by structural formula (II): 
       
         
           
           
               
               
           
         
         with n=1 to 12 and wherein R 1  is selected from straight-chain, branched or cyclic C 1-12 -alkyl groups, C 6-10 -aryl groups, C 6-14 -aralkyl groups, and C 6-14 -alkaryl groups and in that the polymer is terminated by terminal groups, which are, in each case independently of one another, selected from: 
       
       
         
           
           
               
               
           
         
         wherein R 2 , R 3  and R 4  are independently of one another selected from straight-chain, branched or cyclic C 1-12 -alkyl groups, C 6-10 -aryl groups, C 6-12 -aralkyl groups, C 6-12 -alkaryl groups, C 1-4 -alkoxy-C 2-120 -(poly)(oxyalkylene) groups, polyester groups and polycarbonate groups. 
       
     
     
         4 . The polymer of  claim 3 , characterized in that R 2  is an alkoxy-polyoxyethylene group with a molecular weight of 76 to 2000. 
     
     
         5 . A process for the preparation of a curable organic polymer as defined in  claim 1 , characterized in that 2-oxo-1,3-dioxolane-4-carboxylic acid of formula (III): 
       
         
           
           
               
               
           
         
         is reacted with a polymer comprising at least one carbodiimide unit represented by structural formula (IV):
   —N═C═N—  (IV).
 
 
       
     
     
         6 . The process of  claim 5 , characterized in that 0.5 to 2.0 equivalents of 2-oxo-1,3-dioxolane-4-carboxylic acid of formula (III) are used per carbodiimide unit of formula (IV). 
     
     
         7 . The process of  claim 5 , characterized in that the reaction is performed at 20-100° C. 
     
     
         8 . The process of  claim 5 , characterized in that the reaction is carried out in the presence of a solvent. 
     
     
         9 . The process of  claim 5 , characterized in that the reaction is performed in the presence of a catalyst selected from tertiary amines, organometallic compounds, and mixtures thereof. 
     
     
         10 . A process comprising utilizing the polymer as defined in  claim 1  comprising curing the polymer for the preparation of a cured composition. 
     
     
         11 . The process of  claim 10 , characterized in that the polymer is cured by reaction with an at least bifunctional amine. 
     
     
         12 . The process of  claim 5 , characterized in that the reaction is performed at 20-30° C. 
     
     
         13 . The process of  claims 5 , characterized in that the reaction is carried out in the presence of a solvent selected from acetone, THF, toluene and dioxane. 
     
     
         14 . The polymer of  claim 1 , comprising 4 to 8 acylurea units.