Production methods for glassy liquid-crystalline epoxy resin and glassy liquid-crystalline epoxy resin composition, storage methods for liquid-crystalline epoxy resin and liquid-crystalline epoxy resin composition, glassy liquid-crystalline epoxy resin and glassy liquid-crystalline epoxy resin composition, liquid-crystalline epoxy resin and liquid-crystalline epoxy resin composition, and production method for cured epoxy resin

Inventors: Shingo Tanaka (Tokyo, JP); Tomoko Higashiuchi (Tokyo, JP); Naoki Maruyama (Tokyo, JP); Kazumasa Fukuda (Tokyo, JP); Yoshitaka Takezawa (Tokyo, JP); Fusao Hojo (Tokyo, JP)

Assignee: HITACHI CHEMICAL COMPANY, LTD.

C08G59/245 C08G59/504 C08G2250/00

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Quick Facts

Patent No.: US 10,597,485
App. No.: 16/477,353
Granted: Mar 24, 2020
Kind: B2

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Abstract

A production method for a glassy liquid-crystalline epoxy resin, comprising a process of cooling a liquid-crystalline epoxy resin to cause transition into a glassy state.

Claims (15)

1. A production method for a glassy liquid-crystalline epoxy resin, comprising a process of cooling a liquid-crystalline epoxy resin to cause transition into a glassy state.

2. The production method for a glassy liquid-crystalline epoxy resin according to claim 1 , wherein the glassy liquid-crystalline epoxy resin or the glassy liquid-crystalline epoxy resin composition has a nematic structure.

3. The production method for a glassy liquid-crystalline epoxy resin according to claim 1 , wherein the transition into a glassy state is caused at 0° C. or higher.

4. A production method for a cured epoxy resin, comprising a process of heating the glassy liquid-crystalline epoxy resin produced by the production method according to claim 1 , at a temperature at which a curing reaction of the glassy liquid-crystalline epoxy resin or the glassy liquid-crystalline epoxy resin composition is caused.

5. A production method for a glassy liquid-crystalline epoxy resin composition, comprising a process of cooling a liquid-crystalline epoxy resin composition, the liquid-crystalline epoxy resin composition comprising a liquid-crystalline epoxy resin and a curing agent, to cause transition into a glassy state.

6. The production method for a glassy liquid-crystalline epoxy resin according to claim 5 , wherein the liquid-crystalline epoxy resin is a liquid-crystalline epoxy resin in a liquid state that is obtained by heating a glassy liquid-crystalline epoxy resin.

7. A production method for a cured epoxy resin, comprising a process of heating the glassy liquid-crystalline epoxy resin composition produced by the production method according to claim 5 , at a temperature at which a curing reaction of the glassy liquid-crystalline epoxy resin or the glassy liquid-crystalline epoxy resin composition is caused.

8. The production method for a glassy liquid-crystalline epoxy resin composition according to claim 5 , wherein the glassy liquid-crystalline epoxy resin or the glassy liquid-crystalline epoxy resin composition has a nematic structure.

9. The production method for a glassy liquid-crystalline epoxy resin composition according to claim 5 , wherein the transition into a glassy state is caused at 0° C. or higher.

10. A storage method for a liquid-crystalline epoxy resin, comprising a process of cooling a liquid-crystalline epoxy resin to cause transition into a glassy state.

11. A production method for a cured epoxy resin, comprising a process of heating the glassy liquid-crystalline epoxy resin according to claim 10 , at a temperature at which a curing reaction of the glassy liquid-crystalline epoxy resin or the glassy liquid-crystalline epoxy resin composition is caused.

12. A storage method for a liquid-crystalline epoxy resin composition, comprising a process of cooling a liquid-crystalline epoxy resin composition, the liquid-crystalline epoxy resin composition comprising a liquid-crystalline epoxy resin and a curing agent, to cause transition into a glassy state.

13. A production method for a cured epoxy resin, comprising a process of heating the glassy liquid-crystalline epoxy resin composition according to claim 12 , at a temperature at which a curing reaction of the glassy liquid-crystalline epoxy resin or the glassy liquid-crystalline epoxy resin composition is caused.

14. A glassy liquid-crystalline epoxy resin having a liquid-crystalline structure.

15. A glassy liquid-crystalline epoxy resin composition, comprising a liquid-crystalline epoxy resin and a curing agent, and having a liquid-crystalline structure.

Assignments (5)

CHANGE OF ADDRESS Recorded Feb 14, 2024

From: RESONAC CORPORATION

To: RESONAC CORPORATION

Reel/Frame 066599/0037 →

CORRECTIVE ASSIGNMENT TO CORRECT THE THE ADDRESS OF THE ASSIGNEE PREVIOUSLY RECORDED AT REEL: 06236 FRAME: 0323. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded Mar 16, 2023

From: SHOWA DENKO MATERIALS CO., LTD.

To: RESONAC CORPORATION

Reel/Frame 063193/0416 →

CHANGE OF NAME Recorded Feb 9, 2023

From: SHOWA DENKO MATERIALS CO., LTD.

To: RESONAC CORPORATION

Reel/Frame 062636/0323 →

CHANGE OF NAME Recorded Feb 7, 2023

From: HITACHI CHEMICAL COMPANY, LTD.

To: SHOWA DENKO MATERIALS CO., LTD.

Reel/Frame 062668/0794 →

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 11, 2019

From: TANAKA, SHINGO; HIGASHIUCHI, TOMOKO; MARUYAMA, NAOKI; FUKUDA, KAZUMASA; TAKEZAWA, YOSHITAKA; HOJO, FUSAO

To: HITACHI CHEMICAL COMPANY, LTD.

Reel/Frame 049728/0960 →