Molecular level coating of metal oxide particles Molecular level coating of metal oxide particles

Abstract

Polymer encapsulated metal oxide particles are prepared by combining a polyamide acid in a polar aprotic solvent with a metal alkoxide solution. The polymer was imidized and the metal oxide formed simultaneously in a refluxing organic solvent. The resulting polymer-metal oxide is an intimately mixed commingled blend, possessing synergistic properties of both the polymer and preceramic metal oxide. The encapsulated metal oxide particles have multiple uses including, being useful in the production of skin lubricating creams, weather resistant paints, as a filler for paper, making ultraviolet light stable filled printing ink, being extruded into fibers or ribbons, and coatings for fibers used in the production of composite structural panels.

What is claimed as new and desired to secured by Letters Patent of the United States is:  
     
         1 . A composition of matter consisting of a powder formed of multiple individual molecules of a metal oxide and a coating of a polymer provided on each of said molecules.  
     
     
         2 . The composition of matter of  claim 1  wherein said metal oxide is selected from the group of metal oxides consisting of titanium oxide, zirconium oxide and silica oxide.  
     
     
         3 . The composition of matter article of  claim 1  wherein said polymer is a polyimide.  
     
     
         4 . A paint consisting of a nominal one-part quantity, by weight, of the composition of matter of  claim 1  admixed with a nominal two part quantity, by weight, of a binder material, said binder material being selected from the group of binder materials consisting of tung oil and clear vinyl lacquer.  
     
     
         5 . The paint of  claim 4  wherein said individual molecules of metal oxide consist of titanium oxide molecules.  
     
     
         6 . A coating material consisting of one-part quantity, by weight, of the composition of matter of  claim 1  admixed with a two part quantity, by weight, of a liquid binder material, said liquid binder material being selected from the group of liquid binder materials consisting of epoxy resin and rubber cement.  
     
     
         7 . A skin unguent consisting of a one part quantity, by weight, of the composition of matter of  claim 1  mixed into a 1 to 10 part quantity, by weight, of mineral oil.  
     
     
         8 . A skin unguent consisting of a one part quantity, by weight, of the composition of matter of  claim 1  mixed into a 1 to 10 part quantity, by weight, of glycerin.  
     
     
         9 . A skin unguent consisting of a one part quantity, by weight, of the composition of matter of  claim 1  mixed into an emulsion consisting of glycerin, mineral oil and water.  
     
     
         10 . The skin unguent  claim 9  wherein said emulsion consists of 0.5 to 4 parts, by weight, of mineral oil, 0.5 to 4 parts, by weight of glycerin, and 0.04 to 1 part, by weight, of water.  
     
     
         11 . A filled paper consisting of one part quantity, by weight, of the composition of matter of  claim 1  mixed with eight parts, by weight, of cellulose pulp.  
     
     
         12 . An ultraviolet light stable filled printing ink consisting of a one part aliquot, by weight, of the composition of matter of  claim 1  admixed with ten parts, by weight, of a printing ink.  
     
     
         13 . The composition of matter of  claim 3  wherein the polyimide has repeating units of:  
       
         
           
           
               
               
           
         
       
       wherein Ar is an organic moiety selected from the group of organic moieties consisting of:  
       
         
           
           
               
               
           
         
       
       wherein the catenation is meta, meta; meta, para; or para, para; 
 wherein R is an organic moiety selected from the group of organic moieties consisting of:  
                     
 and, wherein n is an integer in the range of 10 to 10,000.