Water-in-oil creams of organosilicon compounds

Abstract

The invention relates to hydrocarbon-free aqueous creams of organosilicon compounds, their preparation and their use. The hydrocarbon-free water-in-oil creams of organosilicon compounds comprise the components: (A) one or more C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A1), alkoxy-containing organopolysiloxanes (A2) and/or organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least 0.01, (B) one or more emulsifiers and (C) water.

1 . A hydrocarbon-free water-in-oil cream of organosilicon compounds, which comprises the components 
 (A) one or more optionally halogen-substituted alkyl-alkoxysilanes (A1), alkoxy-containing organopolysiloxanes (A2) and/or organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least about 0.01,    (B) one or more emulsifiers and    (C) water.    
     
     
         2 . A hydrocarbon-free water-in-oil cream of organosilicon compounds, which comprises the components 
 (A) one or more optimally halogen-substituted C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A1), alkoxy-containing organopolysiloxanes (A2) and/or organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units which bear Si—C-bonded radicals containing basic nitrogen, with the proviso that the amine number of the organopolysiloxane is at least 0.01,    (B) one or more emulsifiers and    (C) water.    
     
     
         3 . The cream as claimed in  claim 2 , wherein the C 2 -C 20 -alkyl-C 2 -C 6 -alkoxysilanes (A1) have 1 or 2 identical or different, unsubstituted or halogen-substituted, SiC-bonded monovalent C 1 -C 20 -alkyl radicals and the other radicals are identical or different C 2 -C 6 -alkoxy radicals.  
     
     
         4 . The cream as claimed in  claim 2 , wherein the C 1 -C 20 -alkyl-C 1 -C 6 -alkoxysilanes (A1) are present in an amount of from about 5 to 100% by weight, based on the amount of active ingredients (A1), (A2) and/or (A3).  
     
     
         5 . The cream as claimed in  claim 1 , wherein the alkoxy-containing organopolysiloxanes (A2) comprise units of the formula (I)  
       R x Si(OR 1 ) y Si(OH) z O 4-x-y-z/2    (I)  
       where 
 R are identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C 1 -C 20 -hydrocarbon radicals,  
 R 1  are identical or different monovalent C 1 -C 6 -alkyl radicals,  
 x is 0, 1, 2 or 3, on average from 0.8 to 1.8,  
 y is 0, 1, 2 or 3, on average from 0.01 to 2.0, and  
 z is 0, 1, 2 or 3, on average from 0.0 to 0.5, with the proviso that the sum of x, y and z is not more than 3.5.  
 
     
     
         6 . The cream as claimed in  claim 2 , wherein the alkoxy-containing organopolysiloxanes (A2) are present in an amount of from about 5 to 100% by weight, based on the amount of active ingredients (A1), (A2) and/or (A3).  
     
     
         7 . The cream as claimed in  claim 2 , wherein the organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units comprising units of the formula (II)  
       R 2   a R 3   b (OR 4 )cSiO 4-a-b-c/2    (II)  
       where 
 R 2  are identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C 1 -C 20 -hydrocarbon radicals which are free of basic nitrogen,  
 R 3  are identical or different monovalent, unsubstituted or halogen-substituted, SiC-bonded C 1 -C 30 -hydrocarbon radicals which contain basic nitrogen,  
 R 4  may be identical or different and are each a hydrogen atom or a C 1 -C 6 -alkyl radical,  
 a is 0, 1, 2 or 3,  
 b is 0, 1, 2 or 3, on average at least 0.05, and  
 c is 0, 1, 2 or 3,  
 with the proviso that the sum of a, b and c is less than or equal to 3.  
 
     
     
         8 . The cream as claimed in  claim 2 , wherein the organopolysiloxanes (A3) which comprise, in addition to other organosiloxane units, siloxane units containing basic nitrogen are present in an amount of from about 5 to 100% by weight, based on the amount of active ingredients (A1), (A2) and/or (A3).  
     
     
         9 . The cream as claimed in  claim 2 , wherein the emulsifiers (B) have an HLB of from about 2 to 5.  
     
     
         10 . The cream as claimed in  claim 2 , wherein the emulsifiers (B) are selected from the group consisting of sorbitan esters, fatty alcohol ethoxylates, lanolin derivatives, fatty acid esters, glucose esters and emulsifiers based on polyglycerol or pentaerythritol.  
     
     
         11 . The cream according to  claim 2 , wherein the emulsifier is cetyl dimethicone copolyol.  
     
     
         12 . The cream as claimed in  claim 2 , wherein the emulsifiers (B) are present in an amount of from about 1 to about 40% by weight, based on the amount of active ingredients (A1), (A2) and/or (A3).  
     
     
         13 . The cream according to  claim 2 , wherein the emulsifiers (B) are present in an amount from about 5 to about 40% by weight, based upon the amount fo active ingredients (A1), (A2) and/or (A3).  
     
     
         14 . The cream as claimed in  claim 2 , wherein the amount of the components (A)+(B) is from about 5 to about 50% by weight, based upon total weight of the cream.  
     
     
         15 . The cream as claimed in  claim 2 , wherein the amount of the components (A) and (B) is from 20 to 40% by weight, based upon total weight of the cream.  
     
     
         16 . A method for waterproofing building materials which comprises applying a cream according to  claim 1  to said building materials.  
     
     
         17 . A coating composition which comprises a cream according to  claim 1 .  
     
     
         18 . A process for hydrophobing finely divided inorganic materials which comprises contacting a cream according to  claim 1  with said materials.  
     
     
         19 . The process according to  claim 18  wherein the finely divided inorganic materials are perlite, vermiculite, or a thermal insulation material.  
     
     
         20 . A finely divided hydrophobized inorganic material is obtained by the process according to  claim 18.