Patent ID: 7380700
Filing Date: 2008-06-03
Classification: B23K

Abstract:
1. A paste composition usable for joining a metal, ceramics or graphite by brazing in a reducing gas atmosphere furnace, an inert gas atmosphere furnace or a vacuum furnace, comprising a brazing powder, butyl rubber and a liquid organic solvent, said butyl rubber being dissolved in said liquid organic solvent, and said liquid organic solvent being completely removable from said composition upon heating, wherein the brazing powder includes at least one member selected from the group consisting of copper brazing powder, brass brazing powder, silver brazing powder, phosphorus copper brazing powder, nickel brazing powder, gold brazing powder, palladium brazing powder, copper-manganese brazing powder, silver-manganese brazing powder and cobalt brazing powder, and the paste composition comprises the brazing powder in an amount of at least 80 mass % and not more than 95 mass % and the butyl rubber in an amount of at least 0.5 mass % and not more than 10 mass %, respectively, based on 100 mass % of the paste composition.