A method for producing a thermosetting aqueous lubricating resin solution excellent in surface lubricity and processability and a method for surface treatment of steel sheet using the same

摘要

The present invention relates to a thermosetting water-based lubricant resin having excellent surface lubricity and processability, and a method of treating a surface of a steel sheet using the same. According to the present invention, the epoxy resin has a bisphenol type molecular weight of 1000 to 5000, Acrylate, ethyl acrylate, ethyl methacrylate and styrene in a ratio of 1: 1 to 5 in terms of an epoxy part and an acrylic part by weight, to obtain a thermosetting aqueous epoxy Preparing a cured acrylate resin; Adding a neutralizing agent to the produced resin and neutralizing the resin to allow the resin to be water-soluble; After completion of the neutralization reaction, diluting the resin with pure water to prepare a resin solution so that the solid content is 10 to 35% by weight; The resulting resin solution is mixed with at least one member selected from the group consisting of olefin wax and polyethylene wax and mixtures thereof with paraffin wax as a lubricant and added in an amount of 3 to 25 parts by weight per 100 parts by weight of resin solids, Wherein the curing agent is selected from the group consisting of an isocyanate compound, an isocyanate compound, and a urea resin compound in an amount of 4 to 35 parts by weight based on 100 parts by weight of the resin solid content. The steel plate is coated with the prepared solution in a thickness of 0.5 to 5 and then baked at a temperature of 140 to 200C. The steel plate is further excellent in surface friction and workability.