| 摘要 |
1,218,049. Electro-phoretic painting. SCM CORP. Oct. 4, 1968 [Oct. 11, 1967], No. 47288/68. Heading C7B. An electro-coat substrate, particularly of metal such as phosphated steel, anodized aluminium or tinplate, having pits, scratches, pores, roughness, smut deposits or other blemishes, is treated prior to electro-coating with a paint film by depositing, e. g. by knifing, brushing or rolling, a layer of a mixture of binder resin and electrically conductive filler, e.g. graphite particles, carbon black, metal powders or flakes, on the blemishes, and curing the layer. The proportion of filler is sufficient for yielding a cured layer having the same electrical conductivity as that of the substrate. After curing the layer may be smoothed. Any thermosetting or thermo-plastic resin may be used for the binder, but preferably the same as that used in the subsequent paint film; e.g. acrylic or alkyd resins, unsaturated polyesters dissolved in a vinyl monomer or oligomer, malcinized drying oils, epoxy resins, phenolics, aminoplasts, vinyl and vinylidene copolymer, polyethylene resins, butadiene-styrene copolymer, shellac, polyvinylacetate, suitably dissolved or dispersed in an organic solvent or plasticized. |
