| 摘要 |
An aqueous lubricating coating agent to be used for solids comprising a branched carboxylic acid, which is represented by the general formula R1-CH(R2)COOH (wherein R1 and R 2 independently represent each a linear or branched alkyl group having from 4 to 12 carbon atoms) and has a flow point lower than 0 oC, and/or a salt thereof and a solid coating component, wherein the content of the branched carboxylic acid or its salt, each as a solid component, ranges from 0.1 to 50% by mass and the content of the solid coating component ranges from 3 to 99.9% by mass based on the total content of solid matters in the aqueous lubricating coating agent. Thus, it is possible to provide an aqueous lubricating coating agent to be used mainly for metallic materials which shows little foaming, can contain a large amount of a lubricating component, has a high liquid stability, and can form a coating having excellent lubricating properties. The solid coating component is selected from among aqueous inorganic salts, aqueous organic acid salts and water-base resins. The coating agent may further contain an auxiliary lubricating component, an auxiliary baking-tolerance component and so on.
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