Silver Conductive Paint: Silver Powder in Methacrylate Resin and Acetone, Dried at 25-75 °C (NBS Circular 468, 1947)

A silver paint that conducts once it dries at room heat, with no firing, so it can go on plastics and be used to fix leads and draw conductors. Fine silver powder is held in methacrylate resin dissolved in acetone. Source: Brunetti and Curtis, Printed Circuit Techniques, NBS Circular 468 (1947), Table 2, the column for thermoplastic plastics: 70 % silver powder, 20 % methacrylate or polystyrene resin, 10 % ketones, benzene, toluene or ethylene dichloride, dried at 25 to 75 °C. This is the methacrylate (acrylic) version. Ours: precipitated silver ground fine as the silver powder, and acetone of the four solvents. Picture drawn by Youblob.

初学者

1 day

说明

Dissolve 20 g methacrylate resin in 10 g acetone

For 100 g of paint: put 20 g methacrylate resin and 10 g acetone in a jar, close it and let the resin dissolve, stirring now and then. Ours: acetone, one of the four solvents NBS names. Fumes: work in the open air, gloves and goggles.

此步骤所需材料：

亚克力颗粒20 克

丙酮10 克

所需工具：

等臂天平

玻璃罐

硼硅玻璃棒

丁腈手套

化学防溅护目镜

Grind 70 g silver powder fine and stir it in

Grind 70 g silver powder fine and stir it into the resin solution until even. NBS asks for at least 50 % silver for a brushed paint; this one has 70 %. Ours: precipitated silver as the powder.

此步骤所需材料：

沉淀银70 克

所需工具：

等臂天平

研钵与研杵

硼硅玻璃棒

Stir well, keep the jar closed

Stir the paint thoroughly before each use, and keep the jar closed so the solvent does not evaporate and thicken it.

所需工具：

玻璃罐

硼硅玻璃棒

Brush on and dry at 25 to 75 °C

Brush the paint on and dry it at 25 to 75 °C to drive out the solvent. It then conducts. Brushing is ours; NBS also names spraying and screen stencils.

所需工具：