| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a gold resinate suitable for gold resinate paste capable of forming a gold film having resistance even by low temperature firing at 250°C or lower by improving the hard points upon high temperature firing of gold resinate paste.SOLUTION: A gold resinate is obtained by adding aurous chloride synthesized from chlorauric acid, alkali metal salt such as sodium chloride and potassium chloride and mercaptocarboxylic acid or the like into pure water so as to be a mixed liquid, regulating the mixed liquid at a pH of 7.0 to 13.5 while bubbling an inert gas such as an argon gas and a nitrogen gas and holding the reaction system at 10 to 90°C for several hours so as to obtain a gold resinate. According to this production method, the need of only the one where aurous chloride, alkali metal chloride and mercaptocarboxylic acid are beforehand made into a mixed solution, and the reaction is progressed, and fine regulation such as the addition velocity, reaction velocity and reaction temperature of starting raw material is made needless.SELECTED DRAWING: None |
