| 摘要 |
PURPOSE:To improve the characteristics required for a binder by combining a prescribed weight % of an org. gelling agent with a specific % of acrylic resin and toluene. CONSTITUTION:The compsn. consisting of 20-50wt% acrylic resin powder, 0.2- 1% org. gelling agent and the balance toluene is mixed and agitated, then the mixture is heated in a hot bath for 1hr at about 75 deg.C. The mixture is thereafter allowed to cool down to an ordinary temp. and is gelled, by which the agar-like binder is obtd. The paste solder obtd. by mixing and agitating such binder for paste solder and solder powder obviates sepn. and corrosion of the solder powder during storage and obviates oxidation of the base metal to be brazed. The paste solder obviates further generation of residues in the stage of brazing, thus the characteristics required for the binder are improved. |
