Electrical steel sheet adhesive coating composition, electrical steel sheet product, and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-11807922-B2
Application number	US-201716473047-A
Country	US
Kind code	B2
Filing date	Dec 21, 2017
Priority date	Dec 23, 2016
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

An embodiment of the present invention provides: an adhesive coating composition capable of attaching (coupling) an electrical steel sheet without using an existing coupling method, such as welding, clamping, or interlocking; an electrical steel sheet laminate employing the same; and a manufacturing method therefor. The adhesive coating composition according to an embodiment of the present invention comprises: 40-95 wt % of a first component comprising an organic/inorganic composite in which inorganic nanoparticles are substituted in a water-soluble resin; 1-50 wt % of a second component comprising a composite metal phosphate; and 1-10 wt % of an additive.

First claim

The invention claimed is:

1. An electrical steel sheet adhesive coating composition comprising,
with reference to an entire solid of 100 wt %:
10 to 50 wt % of a resin with a side chain including an aromatic hydrocarbon;
5 to 40 wt % of an organic/inorganic composite with inorganic nanoparticles substituted for the resin;
10 to 30 wt % of a composite metal phosphate including at least one of a first aluminum phosphate (Al(H 2 PO 4 ) 3 ), a first cobalt phosphate (Co(H 2 PO 4 ) 2 ), a first calcium phosphate (Ca(H 2 PO 4 ) 2 ), a first zinc phosphate (Zn(H 2 PO 4 ) 2 ), and a first magnesium phosphate (Mg(H 2 PO 4 ) 2 );
5 to 50 wt % of phosphoric acid; and
1 to 15 wt % of a cohesion reinforcing agent including at least one of an oxide, carbon nanotubes (CNT), carbon black, a pigment, and a coupling agent.

2. The electrical steel sheet adhesive coating composition of claim 1 , wherein
the aromatic hydrocarbon includes at least one of benzene, toluene, xylene, naphthalene, anthracene, and benzopyrene.

3. The electrical steel sheet adhesive coating composition of claim 1 , wherein
the resin includes at least one of an epoxy-based resin, a siloxane-based resin, an acryl-based resin, a phenol-based resin, a styrene-based resin, a vinyl-based resin, an ethylene-based resin, and a urethane-based resin.

4. The electrical steel sheet adhesive coating composition of claim 1 , wherein
the resin has a weight average molecular weight of 1000 to 100,000 and a softening point (Tg) of 30 to 150° C.

5. The electrical steel sheet adhesive coating composition of claim 1 , wherein
the inorganic nanoparticles include at least one of Sift, Al 2 O 3 , TiO 2 , MgO, ZnO, CaO, and ZrO 2 .

6. The electrical steel sheet adhesive coating composition of claim 1 , wherein
the inorganic nanoparticles are substituted in the organic/inorganic composite at 10 to 50 wt %.

7. An electrical steel sheet laminate comprising:
a plurality of electrical steel sheets; and
a thermal fusion layer provided between the plurality of electrical steel sheets,
wherein the thermal fusion layer includes:
10 to 50 wt % of a resin with a side chain including an aromatic hydrocarbon,
5 to 40 wt % of an organic/inorganic composite with inorganic nanoparticles substituted to the resin,
10 to 30 wt % of a composite metal phosphate including at least one of a first aluminum phosphate (Al(H 2 PO 4 ) 3 ), a first cobalt phosphate (Co(H 2 PO 4 ) 2 ), a first calcium phosphate (Ca(H 2 PO 4 ) 2 ), a first zinc phosphate (Zn(H 2 PO 4 ) 2 ), and a first magnesium phosphate (Mg(H 2 PO 4 ) 2 ),
5 to 50 wt % of a phosphoric acid, and
1 to 15 wt % of a cohesion reinforcing agent including at least one of an oxide, carbon nanotubes (CNT), carbon black, a pigment, and a coupling agent.

Assignees

• Posco
• Posco Co Ltd

Inventors

• Kim Jung-Woo
• Ha Bongwoo
• No Taeyoung
• Bong Won-Seog

Classifications

• C22C38/02 Primary

  containing silicon · CPC title

• B05D3/0254

  After-treatment · CPC title

• B05D7/14

  to metal, e.g. car bodies (involving a chemical reaction between the metal and the coating C23) · CPC title

• C08K3/08

  Metals · CPC title

• C08K3/22

  of metals · CPC title