IP Library Granted Patent US 12,319,811
Granted Patent B2
US 12,319,811 · App. 18/043,053 · Granted Jun 3, 2025

Method of producing resin and method of producing insulating structure

Inventors: Yu Yamashita (Tokyo, JP); Tetsuo Yoshimitsu (Tokyo, JP); Kotaro Mura (Tokyo, JP); Takahiro Imai (Kawasaki, JP)
Assignee: TMEIC CORPORATION
C08L63/00C08G59/42C08J5/249C08K3/22C08K5/06H01B3/40B82Y30/00C08J2363/00C08K2201/003C08K2201/011C08L2201/56C08L2203/202
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Quick Facts
Patent No.
US 12,319,811
App. No.
18/043,053
Granted
Jun 3, 2025
Kind
B2
Abstract

A resin producing method is a method of producing a resin with which an insulating structure formed on an outer peripheral portion of a conductor is impregnated. The resin producing method includes a dispersion liquid mixing step of mixing an epoxy resin and a dispersion liquid in which a nanofiller is dispersed in a reactive diluent that reduces a viscosity of the epoxy resin by reacting with the epoxy resin, and a curing agent mixing step of mixing a composition produced by the dispersion liquid mixing step, with a curing agent that cures the epoxy resin. The epoxy resin includes, for example, an alicyclic epoxy resin.

Claims (39)

1. A method of producing a resin with which an insulating structure formed on an outer peripheral portion of a conductor is impregnated, the method comprising:

a dispersion liquid mixing step of mixing an epoxy resin with a dispersion liquid in which a nanofiller is dispersed in a reactive diluent that reduces a viscosity of the epoxy resin by reacting with the epoxy resin; and

a curing agent mixing step of mixing a composition produced by the dispersion liquid mixing step, with a curing agent that cures the epoxy resin.

2. The method of producing a resin according to claim 1 , wherein

the epoxy resin includes an alicyclic epoxy resin.

3. The method of producing a resin according to claim 2 , wherein

the reactive diluent includes butyl glycidyl ether.

4. The method of producing a resin according to claim 1 , wherein

a particle diameter of the nanofiller in the dispersion liquid is 50 nm or less.

5. The method of producing a resin according to claim 1 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

6. The method of producing a resin according to claim 2 , wherein

a particle diameter of the nanofiller in the dispersion liquid is 50 nm or less.

7. The method of producing a resin according to claim 3 , wherein

a particle diameter of the nanofiller in the dispersion liquid is 50 nm or less.

8. The method of producing a resin according to claim 2 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

9. The method of producing a resin according to claim 3 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

10. The method of producing a resin according to claim 4 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

11. The method of producing a resin according to claim 6 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

12. The method of producing a resin according to claim 7 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

13. A method of producing an insulating structure formed on an outer peripheral portion of a conductor, the method comprising:

a resin production step of producing a resin including a nanofiller; and

a step of impregnating a non-conductive tape-shaped member wound around an outer peripheral portion of the conductor, with the resin, wherein

the resin production step includes

a dispersion liquid mixing step of mixing an epoxy resin with a dispersion liquid in which the nanofiller is dispersed in a reactive diluent that reduces a viscosity of the epoxy resin by reacting with the epoxy resin, and

a curing agent mixing step of mixing a composition produced by the dispersion liquid mixing step, with a curing agent that cures the epoxy resin.

14. The method of claim 13 , wherein

the epoxy resin includes an alicyclic epoxy resin.

15. The method of claim 14 , wherein

the reactive diluent includes butyl glycidyl ether.

16. The method of claim 13 , wherein

a particle diameter of the nanofiller in the dispersion liquid is 50 nm or less.

17. The method of claim 13 , wherein

a content of the nanofiller with respect to an entire mixture other than the nanofiller included in the resin is 2 wt % to 30 wt %.

Assignments (2)
CHANGE OF NAME Recorded Apr 26, 2024
From: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
To: TMEIC CORPORATION
Reel/Frame 067244/0359 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 27, 2023
From: YAMASHITA, YU; MURA, KOTARO; IMAI, TAKAHIRO
To: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Reel/Frame 062807/0635 →
Priority Claims (1)
JP 2020-145094 · Aug 28, 2020 · national
Continuity (1)
Related Publication 20230399504A1 · Dec 14, 2023
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