Polymers with urea groups and silyl groups and production and use thereof

Abstract

A process for the production of compounds which contain at least one urea group and at least one silyl goup. The process involves reacting a compound containing at least one amino group and a carbamate compound. The compounds produced by this process are useful as surface coating compositions, foams, and adhesives.

1 . A process for the production of compounds containing at least one urea group and at least one silyl group in which a compound containing at least one amino group and a carbamate are reacted together as reactants, at least one of the reactants carrying a silyl group.  
   
   
       2 . A process as claimed in  claim 1 , characterized in that the reaction is carried out in the presence of a catalyst.  
   
   
       3 . A process as claimed in  claim 1  or  2 , characterized in that a methyl carbamate or ethyl carbamate is used as the carbamate.  
   
   
       4 . A process as claimed in any of  claims 1  to  3 , characterized in that a catalyst selected from the group consisting of organic bases and organometallic compounds is used as the catalyst.  
   
   
       5 . A process as claimed in any of  claims 1  to  4 , characterized in that at least one polymer is used as at least one reactant.  
   
   
       6 . A process as claimed in any of  claims 1  to  5 , characterized in that the polymer used is a polymer selected from the group consisting of polyacrylates, polymethacrylates, polystyrenes, polyesters, polyethers, polyamides, polyurethanes, polycarbonates, polylactones, polyethylene imine, polyureas, polyolefins and polyoxazolidones.  
   
   
       7 . A process as claimed in any of  claims 1  to  6 , characterized in that at least one reactant containing at least two carbamate groups is used.  
   
   
       8 . A process as claimed in  claim 7 , characterized in that the reactant containing at least two carbamate groups is a polymer.  
   
   
       9 . A process as claimed in  claim 7  or  8 , characterized in that it is carried out in the presence of a trimerization catalyst.  
   
   
       10 . A process as claimed in any of  claims 1  to  9 , characterized in that the reaction of the reactants is not continued to the complete reaction of all the carbamate groups.  
   
   
       11 . A process as claimed in any of  claims 1  to  10 , characterized in that at least one compound containing a silyl group, a urea group and a carbamate group is present after the reaction.  
   
   
       12 . A polymer obtainable by the process claimed in any of  claims 1  to  11 .  
   
   
       13 . A polymer which contains at least one isocyanurate structural element, at least one urea group and at least one alkoxysilyl group; if the polymer contains more than one isocyanurate structural element, no structural element obtainable by reaction of an isocyanate group with an isocyanate-reactive functional group is present between at least two isocyanurate structural elements in the polymer or the structure lying between two isocyanurate groups has a molecular weight of at least 300.  
   
   
       14 . A polymer which contains at least one urea group, at least one alkoxysilyl group and at least one carbamate group.  
   
   
       15 . A polymer as claimed in  claim 14 , characterized in that it contains at least one isocyanurate group.  
   
   
       16 . A polymer obtainable by reaction of a prepolymer containing at least two carbamate groups or a mixture of two or more such prepolymers with an alkoxysilane containing at least one amino group, the molar ratio of carbamate groups to amino groups being less than 1.  
   
   
       17 . A polymer as claimed in  claim 16 , characterized in that the reaction is not continued to the complete reaction of all the carbamate groups.  
   
   
       18 . The use of the compound produced by the process claimed in any of  claims 1  to  11  or of the polymer claimed in any of  claims 12  to  17  for the production of surface coating compositions, sealants, adhesives, assembly or insulating foams.  
   
   
       19 . A surface coating composition, sealant, adhesive, assembly or insulating foam containing at least one polymer produced by the process claimed in any of  claims 1  to  11  or the polymer claimed in any of  claims 12  to  17 .  
   
   
       20 . A surface coating composition, sealant, adhesive, assembly or insulating foam as claimed in  claim 19 , characterized in that it contains at least one crosslinking catalyst.