Adhesive coating composition for electrical steel sheet, electrical steel sheet laminate, and method for manufacturing same

An electrical steel sheet laminate comprising:

• a plurality of electrical steel sheets;
• and
• a fusion layer placed between the plurality of electrical steel sheets,
• wherein the fusion layer includes a polyethylene acrylate including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2, and
• the polyethylene acrylate includes 65 to 90 wt % of the repeating unit represented by the following Chemical Formula 1 and 10 to 35 wt % of the repeating unit represented by the following Chemical Formula 2:
• wherein R1 to R7 are independently of one another hydrogen or a linear or branched alkyl group, and R8 is hydrogen, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, a halogen atom, a haloformyl group, a carbonyl group, an aldehyde group, a carboxyl group, an ester group, an amide group, a cyanic acid group, an isocyanic acid group, a nitrile group, a nitro group, a sulfonyl group, a sulfo group, a sulfinyl group, an amine, a hydroxyl group, or an alkoxy group.

A method for manufacturing an electrical steel sheet laminate, the method comprising:

• applying an adhesive coating composition on one surface or both surfaces of an electrical steel sheet and curing the composition to form an adhesive coating layer;
• and
• laminating a plurality of electrical steel sheets having the adhesive coating layer formed thereon and performing thermal fusion to form a fusion layer,
• wherein
• the adhesive coating composition includes a polyethylene acrylate including a repeating unit represented by the following Chemical Formula 1 and a repeating unit represented by the following Chemical Formula 2, and
• the polyethylene acrylate includes 65 to 90 wt % of the repeating unit represented by the following Chemical Formula 1 and 10 to 35 wt % of the repeating unit represented by the following Chemical Formula 2:
• wherein R1 to R7 are independently of one another hydrogen or a linear or branched alkyl group, and R8 is hydrogen, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, a halogen atom, a haloformyl group, a carbonyl group, an aldehyde group, a carboxyl group, an ester group, an amide group, a cyanic acid group, an isocyanic acid group, a nitrile group, a nitro group, a sulfonyl group, a sulfo group, a sulfinyl group, an amine, a hydroxyl group, or an alkoxy group.