Investment Binder and Use of the Investment Binder

Abstract

Investment binder for forming a binder phase when applied to an investment casting, wherein this binder comprises I at least a first compound as a source of magnesium-ions, II a second compound as a source of phosphate-ions and III a third compound being a surface reaction control agent incorporated in one of the other compounds above, and use of this investment binder.

1 - 6 . (canceled) 
     
     
         7 . An investment binder for forming a binder phase when applied to an investment casting, wherein the investment binder comprises
 I at least a first compound as a source of magnesium-ions,   II a second compound as a source of phosphate-ions and   III a third compound being a surface reaction control agent incorporated in the first or the second compound.   
     
     
         8 . The investment binder according to  claim 7 , wherein the surface reaction control agent is selected from the group consisting of hexagonal boron nitride, ion-exchange agents, zeolites and clay-containing minerals, including bentonites. 
     
     
         9 . The investment binder according to  claim 7 , wherein the surface reaction control agent is provided for a surface treatment. 
     
     
         10 . The investment binder according to  claim 7 , wherein the second compound is an alkali metal-phosphate or an ammonium-phosphate. 
     
     
         11 . Use of the investment binder according to  claim 7  for the formation of a dental investment casting, wherein the investment binder forms a surface reaction controlled interface layer between a base material, preferably a ceramic material, and a glass material and/or metal alloy and/or a precious metal. 
     
     
         12 . Use of the investment binder according to  claim 11 , wherein the investment binder is used for preventing or controlling the formation of reaction layers between said base material and said glass material and/or metal alloy and/or precious metal when applying the said glass material and/or metal alloy and/or precious metal to the base material.