| 摘要 |
PURPOSE:To produce a catalytic soln. enabling satisfactory electroless plating on an electrically insulating substance by preparing an aqueous soln. of a specified pH contg. specified amounts of metal copper particles, gelatin, polyethylene glycol having a specified mol.wt. and alpha,alpha'-dipyridyl. CONSTITUTION:An aqueous soln. contg. >=0.3g/l bivalent copper ions, >=0.8g gelatin basing on 1g copper ions and >=0.8g polyethylene glycol having 1,000-20,000 average mol.wt. is prepd. The soln. is heated to >=40 deg.C and about 1-100mg/l alpha,alpha'-dipyridyl and >=1.2g dimethylamine borane basing on 1g bivalent copper ions are added to the soln. to reduce the bivalent copper ions to metal copper. The pH of the soln. is then adjusted to 2-9. When the surface of an electrically insulating resin is treated with the resulting catalytic soln. of copper colloid for electroless plating, perfect coating can be carried out by electroless plating. |
