Coating composition for electrical steel sheet, and electrical steel sheet comprising insulating coating
AssigneePosco
InventorsMi Serk Kwon, Ho-Kyung Shim, Hyunchul Ko, Byung-Chul Kim, Jung-Woo Kim, Heon-Jo Choi, Taeyoung No
Life of this patent
Estimating the term…
Abstract
An embodiment of the present invention includes: an electrical steel sheet substrate; and an insulating coating on one or both surfaces of the electrical steel sheet substrate, wherein the insulating coating includes a silane compound and a metal hydroxide.
Claims32
An electrical steel sheet, comprising
- an electrical steel sheet substrate, and
- an insulating coating on one or both surfaces of the electrical steel sheet substrate,
- wherein the insulating coating includes a silane compound represented by Chemical Formula 1 and a metal hydroxide:
- wherein, in Chemical Formula 1, R1 and R2 are independently hydrogen, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group, L is a direct bond or a divalent linking group,
- m is an integer of 1 to 4, and n is 4-m.
An insulating coating composition for an electrical steel sheet, comprising a silane compound represented by Chemical Formula 1 and a metal hydroxide:
- wherein, in Chemical Formula 1, R1 and R2 are independently hydrogen, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group, L is a direct bond or a divalent linking group,
- m is an integer of 1 to 4, and n is 4-m.
(canceled)
(canceled)
A method of manufacturing an electrical steel sheet, comprising:
- preparing a hot-rolled sheet by hot-rolling a slab, cold-rolling the hot-rolled sheet, and then preparing a finally annealed steel sheet;
- and
- applying an insulating coating composition to the steel sheet to form an insulating coating,
- wherein the insulating coating composition includes a silane compound represented by Chemical Formula 1 and a metal hydroxide:
- wherein, in Chemical Formula 1, R1 and R2 are independently hydrogen, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group, L is a direct bond or a divalent linking group,
- m is an integer of 1 to 4, and n is 4-m.
(canceled)
An insulating coating composition for an electrical steel sheet, comprising:
- a silane compound represented by Chemical Formula 1;
- and at least one chromic acid compound of chromic anhydride, chromate, and dichromate:
- wherein, in Chemical Formula 1, R1 is hydrogen, a halogen element, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group, L is a direct bond or a divalent linking group,
- m is an integer of 1 to 4, and n is 4-m.
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
(canceled)
An electrical steel sheet, comprising
- an electrical steel sheet substrate and
- an insulating coating on one or both surfaces of the electrical steel sheet substrate,
- wherein the insulating coating comprises a silane compound represented by Chemical Formula 1 and at least one chromic acid compound of chromic anhydride, chromate, and dichromate:
- wherein, in Chemical Formula 1, R1 is hydrogen, a halogen element, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group, L is a direct bond or a divalent linking group,
- m is an integer of 1 to 4, and n is 4-m.
A method of manufacturing an electrical steel sheet, comprising:
- preparing an electrical steel sheet substrate;
- and
- forming an insulating coating by applying an insulating coating composition to one or both surfaces of an electrical steel sheet substrate,
- wherein the insulating coating composition comprises a silane compound represented by Chemical Formula 1, and at least one chromic acid compound of chromic anhydride, chromate, and dichromate:
- wherein, in Chemical Formula 1, R1 is hydrogen, a halogen element, a linear or branched alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkoxy group, or an aminoalkyl group, L is a direct bond or a divalent linking group,
- m is an integer of 1 to 4, and n is 4-m.
(canceled)
(canceled)
(canceled)
Dependencies are inferred from the claim text.