| 摘要 |
1432218 Coated products MACDERMID INC 5 Nov 1973 [3 Nov 1972] 51279/73 Heading B2E [Also in Division C7] A plastics substrate to be bonded to a metal coating is pretreated by forming a laminate of the plastics substrate and a sacrificial anodised metal foil by bonding the substrate and the sacrificial anodised metal together under heat and pressure, an organic silicon compound being provided between the anodised metal foil and the substrate and chemically stripping the sacrificial metal foil from the laminate. The anodised metal foil may be aluminium foil which has been anodised in phosphoric acid solution or sulphuric acid solution. Numerous suitable organic silicon compounds are specified, and gamma-aminopropyl trimethoxy silane and N-beta-(aminoethyl)-gamma-amino-propyl trimethoxy silane are preferred. The plastics substrate may be of a "filled" polymer, whioh is made by blending into the polymer during a moulding operation particles of titanium dioxide, asbestos or sand. In the Examples glassreinforced epoxy resins are used. Prior to the removal of the sacrificial metal foil the substrate is ready for metal plating and in the Example this is effected by imersing the substrate in a palladium-stannous chloride hydrosol activator solution. |
