Polyimide, producing method of imide compound, and producing method of recycled polyimide

Patent metadata

Field	Value
Publication number	US-2025059327-A1
Application number	US-202418935673-A
Country	US
Kind code	A1
Filing date	Nov 4, 2024
Priority date	May 24, 2022
Publication date	Feb 20, 2025
Grant date	—

Abstract

A polyimide includes a non-crosslinked structure including a main chain. The main chain includes a Si—O—C bond. The main chain may include a C—O—Si—O—C bond. The main chain includes, for example, a group denoted by —OSi(R1)(R2)O—. At least one oxygen atom included in the group bonds to, for example, a carbon atom adjacent to the group to form the Si—O—C bond.

First claim

What is claimed is:

1 . A polyimide comprising:
a non-crosslinked structure including a main chain, wherein the main chain includes a Si—O—C bond.

2 . The polyimide according to claim 1 ,
wherein the main chain includes a C—O—Si—O—C bond.

3 . The polyimide according to claim 1 , wherein
the main chain includes a group denoted by —OSi(R 1 )(R 2 )O—, at least one oxygen atom included in the group bonds to a carbon atom adjacent to the group to form the Si—O—C bond, and in the group, R 1 and R 2 each independently include at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I.

4 . The polyimide according to claim 1 , wherein
the non-crosslinked structure includes a first constitutional unit denoted by Formula (A1),

in Formula (A1),
R 1 and R 2 each independently include at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I,
X and Y each independently represent a divalent group including at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I,
Z represents a tetravalent group including at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I, and

at least one selected from the group consisting of X and Y includes a carbon atom that bonds to an adjacent oxygen atom to form the Si—O—C bond.

5 . The polyimide according to claim 1 , wherein
the non-crosslinked structure includes a second constitutional unit denoted by Formula (A2),

in Formula (A2),
R 1 to R 10 each independently include at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I, and
Z represents a tetravalent group including at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I.

6 . The polyimide according to claim 1 , wherein
the non-crosslinked structure includes a third constitutional unit denoted by Formula (A3),

in Formula (A3), R 1 to R 12 each independently include at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I.

7 . The polyimide according to claim 1 , wherein
the non-crosslinked structure includes a fourth constitutional unit denoted by Formula (A4),

in Formula (A4), R 1 to R 10 and R 13 to R 18 each independently include at least one atom selected from the group consisting of H, C, N, O, S, F, Cl, Br, and I.

8 . The polyimide according to claim 3 ,
wherein R 1 and R 2 each independently represent a hydrogen atom or a hydrocarbon group having a carbon number of greater than or equal to 1 and less than or equal to 6.

9 . A polyimide comprising:
a main chain including a Si—O—C bond, wherein a ratio of the number of silicon atoms included in the main chain to the number of imide groups included in the main chain is greater than or equal to 2% and less than or equal to 50%.

10 . The polyimide according to claim 1 ,
wherein a weight average molecular weight is greater than or equal to 1,000.

11 . A producing method of an imide compound, the producing method comprising:
bringing the polyimide according to claim 1 into contact with a fluorine-containing compound, and obtaining an imide compound that is a decomposition product of the polyimide by reacting the polyimide with the fluorine-containing compound.

12 . The producing method according to claim 11 ,
wherein the fluorine-containing compound includes a fluoride salt.

13 . The producing method according to claim 12 ,
wherein the fluoride salt includes tetrabutylammonium fluoride.

14 . A producing method of a recycled polyimide, the producing method comprising:
obtaining a decomposition product of the polyimide according to claim 1 by decomposing the polyimide, and synthesizing a recycled polyimide by using the decomposition product.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Ando Kota
• Saito Teruhiko
• INOBE Honami

Classifications

• C08G73/1042

  Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds · CPC title

• C08G73/1067

  Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound · CPC title

• C08J11/28

  by treatment with organic compounds containing nitrogen, sulfur or phosphorus · CPC title

• C08J2379/08

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title

• C08G73/106 Primary

  containing silicon · CPC title