Abstract: Organic vehicle systems are described which are used in brazing alloy pastes. A principal feature of the systems is used of non-aqueous solvents to avoid reactions with alloy constituents.

Abstract: A metallic powder having a core of silver and an outer layer of platinum wherein the silver is from about 90 to about 99.5% by weight of the total composition. A process for producing such a powder comprising forming a first aqueous slurry of silver powder, an appropriate amount of lignosulfonate ammonia and water, forming a second slurry of platinum as a platinum-ammonium complex dispersed in a water soluble alkanol, mixing the first and second slurry, adjusting the pH of the mixture to a range of from about 8 to about 10, adding an appropriate amount of hydrazine to the mixture maintaining the resultant slurry at about 40.degree. C. to 60.degree. C. for an appropriate time to coat the platinum onto the silver, then separating the platinum-coated silver powder from the remainder of the slurry.

Abstract: A composition consisting essentially of reaction products of an ammonium salt of an aliphatic acid and a gold complex of a reactive nitrogen-containing organic compounds is soluble in organic solvents and can be used for various purposes including decorating substrates and in the manufacture of printed circuit boards. Typical reaction products include the reaction product of ammonium decanoate and the gold or platinum complex of 1, 2-diaminopropane. The process for producing the composition involves reacting a precious metal salt with a reactive nitrogen containing organic compound to form the precious metal complex and reacting an organic nitrogen compound containing a reactive nitrogen group such as an amino group and an aliphatic acid to form an ammonium salt of an aliphatic acid. Thereafter the ammonium salt is reacted with the precious metal nitrogen organo complex to form the compositions of this invention.