Organosilicon compounds, process for their production and their use

Abstract

Abstract Organosilicon compounds having the formula I and/or II wherein R 1 is a mixture and the proportion of one component of the mixture is 10 to 50 mol %, are produced by reacting silanes having the formula III with mixtures of alcohols having the general formula R 1 —OH, with elimination of R—OH, and R—OH is continuously separated off from the reaction mixture by distillation. The organosilicon compounds can be used in rubber compounds.

We claim:  
     
         1 . An organosilicon compound having the formula I or II  
       
         
           
           
               
               
           
         
       
       wherein R is a methyl or ethyl, 
 R 1  is the same or different and is a C 9 -C 30  branched or unbranched monovalent alkyl,  
 R 2  is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C 1 -C 30  hydrocarbon, and  
 R 1  is a mixture and the proportion of one component of the mixture is 10 to 50 mol %.  
 
     
     
         2 . The organosilicon compound according to  claim 1 , wherein the proportion of one component of the mixture is 10 to 40 mol %.  
     
     
         3 . The organosilicon compound according to  claim 1 , wherein the proportion of one component of the mixture is 15 to 30 mol %.  
     
     
         4 . The organosilicon compound according to  claim 1 , wherein R 2  denotes a member selected from the group consisting of CH 2 , CH 2 CH 2 , CH 2 CH 2 CH 2 , CH 2 CH 2 CH 2 CH 2 , CH(CH 3 ), CH 2 CH(CH 3 ), C(CH 3 ) 2 , CH(C 2 H 5 ), CH 2 CH 2 CH(CH 3 ), CH 2 CH(CH 3 )CH 2  and  
       
         
           
           
               
               
           
         
       
     
     
         5 . A process for the production of an organosilicon compound according to  claim 1 , comprising reacting a silane having the formula III  
       
         
           
           
               
               
           
         
       
       wherein R is methyl or ethyl and R 2  is a branched or unbranched, saturated or unsaturated, aliphatic, aromatic or mixed aliphatic/aromatic divalent C 1 C 30  hydrocarbon, with mixtures of alcohols having the general formula R 1 —OH, to form a reaction mixture, wherein R 1  is different and is a C 9  C 30  branched or unbranched monovalent alkyl, to form R—)H, and continuously separating off R—OH from the reaction mixture by distillation.  
     
     
         6 . A rubber composition comprising a natural or synthetic rubber and an organosilicon compound according to  claim 1 .  
     
     
         7 . An organic polymer composition comprising an organic polymer and an organosilicon compound according to  claim 1 .  
     
     
         8 . Rubber compounds characterised in that they contain rubber, filler, optionally other rubber auxiliary substances and at least one organosilicon compound according to  claim 1 .  
     
     
         9 . A moulded part comprising natural or synthetic rubber or an organic polymer and an organosilicon compound according to  claim 1 .  
     
     
         10 . The moulded part according to  claim 9  which is a pneumatic tire, tire tread, cable sheath, hose, drive belt, conveyor belt, roll covering, tire, shoe sole, sealing ring or a damping element.  
     
     
         11 . A tire tread comprising rubber in which the organosilicon compound according to  claim 1  is exchanged for bis-(3-triethoxysilylpropyl) tetrasulfide in a molar ratio relative to the silicon units of 1:1.8 to 1:2.7.  
     
     
         12 . A rubber compound for the production of tire treads in which the organosilicon compound according to  claim 1  is exchanged for bis-(3-triethoxysilylpropyl) tetrasulfide in a molar ratio relative to the silicon units of 1:1.8 to 1:2.7.