Curable resin composition, cured product, and sheet-like formed body

Patent metadata

Field	Value
Publication number	US-12060482-B2
Application number	US-202117223072-A
Country	US
Kind code	B2
Filing date	Apr 6, 2021
Priority date	Oct 15, 2018
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

A curable resin composition includes a polyether polyol resin represented by general formula (1) and having an epoxy equivalent of 7,000 to 100,000 g/eq, an epoxy resin having a functionality of 3 or more, and an epoxy resin curing agent. Provided is a curable resin composition that is excellent in heat resistance and also excellent in bending resistance in a well-balanced manner and that is applicable in various fields that require heat resistance and toughness, particularly, electrical and electronic fields.n is an integer of 1 or more. A1 and A2 are each a divalent organic group having an aromatic structure and/or an alicyclic structure. B is a hydrogen atom or a glycidyl group.

First claim

The invention claimed is:

1. A curable resin composition comprising:
a polyether polyol resin having an epoxy equivalent of 7,000 to 100,000 g/eq;
an epoxy resin having a functionality of 3 or more; and
an epoxy resin curing agent,
the polyether polyol resin being represented by general formula (1):

[Chem. 1]

wherein, in general formula (1), n is an integer of 1 or more, A 1 and A 2 may be the same as or different from each other and are each a divalent organic group having an aromatic structure and/or an alicyclic structure, provided that the aromatic ring structure and the alicyclic ring structure are contained as either A 1 or A 2 , B is a hydrogen atom or a group represented by formula (2), and at least one of two B's is a group represented by formula (2):

[Chem. 2]

2. The curable resin composition according to claim 1 , wherein the polyether polyol resin contains, in a main chain thereof, 35 to 55 mass % of an aromatic structure and 8 to 25 mass % of an alicyclic structure.

3. The curable resin composition according to claim 1 or 2 , wherein the polyether polyol resin has a number average molecular weight of 9,000 to 40,000.

4. The curable resin composition according to claim 1 , wherein the polyether polyol resin is included in an amount of 45 mass % or more in a solids content.

5. The curable resin composition according to claim 1 , wherein A 1 and A 2 in general formula (1) are each a group represented by general formula (3):
[Chem. 3]

wherein, in general formula (3), R 1 's may be the same as or different from each other and are each a group selected from a hydrogen atom, a hydrocarbon group having 1 to 10 carbon atoms, and a halogen atom, and X is a single bond or a divalent group selected from a divalent hydrocarbon group having 1 to 7 carbon atoms, a divalent organic group having a cyclohexane ring structure or a trimethylcyclohexane ring structure, —O—, —S—, —SO 2 —, and —C(O)—, provided that at least one X in A 1 and A 2 is a divalent group having a cyclohexane ring structure or a trimethylcyclohexane ring structure.

6. The curable resin composition according to claim 1 , wherein the aromatic structure is a benzene ring structure, and the alicyclic structure is a cyclohexane ring structure or a trimethylcyclohexane ring structure.

7. A method for producing the curable resin composition according to claim 1 , comprising producing the polyether polyol resin by reacting a bifunctional epoxy resin with bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.

8. A cured product formed by curing the curable resin composition according to claim 1 .

9. A sheet-like formed body comprising the cured product according to claim 8 .

10. The sheet-like formed body according to claim 9 , having a Tg of 140° C. or higher.

Assignees

• Mitsubishi Chem Corp

Inventors

• Tsuge Yosuke
• Nozawa Kotaro
• Yamamoto Kenta
• Ogasawara Hayato

Classifications

• C08L2203/20

  use in electrical or conductive gadgets · CPC title

• C08L63/00 Primary

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C08G59/5073

  having two nitrogen atoms in the ring · CPC title

• C08G59/245

  aromatic · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title