| 摘要 |
<p>1,187,061. Coating. PHOTOCIRCUITS CORP. 20 Feb., 1967 [22 Feb., 1966], No. 7985/67. Heading B2E. [Also in Divisions C7 and H1] A substrate which is to be coated with metal by an electroless process comprises an insulating core of e.g. phenolic or epoxy paper or polyester or epoxy glass fibre laminates, coated with a resinous layer containing finely divided particles of natural or synthetic rubber or resin. The layer may be applied in a plastic state or as a preformed sheet. The rubber or resin particles are degraded by an oxidising agent e.g. a mixture of chromic and sulphuric acids or a permanganate solution, seeded with stannous chloride, and activated with palladium chloride, and then electroless plated with e.g. nickel or copper. The particles may be of nitrile rubbers, butadiene styrenes, butyl, polybutylene, neoprene, Buna N (registered Trade Mark), acetal resins, silicone rubber, carboxylic synthetic resins, epoxide, phenolic and modified polyamide resins.</p> |
