Thermosetting composition

Patent metadata

Field	Value
Publication number	US-2025002685-A1
Application number	US-202218687017-A
Country	US
Kind code	A1
Filing date	Aug 24, 2022
Priority date	Aug 30, 2021
Publication date	Jan 2, 2025
Grant date	—

Abstract

A thermosetting composition that includes a polyorganosiloxane that has an alkenyl group having 2 to 40 carbon atoms and bonded to a silicon atom, a polyorganosiloxane having a Si—H group, a platinum group metal-based catalyst, and a crosslinking inhibitor. The crosslinking inhibitor contains at least one of a compound represented by formula (1), where R1 to R8 each represents a hydrogen atom, specific groups, or the like, and a compound represented by formula (2), where R11 to R13 each independently represents a hydrocarbon group optionally having a substituent.

First claim

1 . A thermosetting composition comprising:
a polyorganosiloxane that has an alkenyl group having 2 to 40 carbon atoms and bonded to a silicon atom, a polyorganosiloxane having a Si—H group, a platinum group metal-based catalyst, and a crosslinking inhibitor, wherein the crosslinking inhibitor contains at least one of a compound represented by the following formula (1) and a compound represented by the following formula (2):

wherein, in the formula (1), R 1 and R 2 each independently represent a hydrogen atom or an alkyl group optionally having a substituent, or R 1 and R 2 are combined with each other to form an aromatic hydrocarbon ring that may have an alkyl group optionally having a substituent, or to form —O—; R 3 and R 4 each independently represent a hydrogen atom or an alkyl group optionally having a substituent; R 5 and R 6 each independently represent a hydrogen atom or an alkyl group optionally having a substituent; R 7 and R 8 each independently represent a hydrogen atom; R 5 and R 7 , instead of the above definition, may be combined with each other to form an aromatic hydrocarbon ring that may have an alkyl group optionally having a substituent; R 6 and R 8 , instead of the above definition, may be combined with each other to form an aromatic hydrocarbon ring that may have an alkyl group optionally having a substituent; and unless R 1 and R 2 are combined with each other to form —O—, the compound represented by the formula (1) has at least one alkyl group optionally having a substituent;

wherein, in the formula (2), R 11 to R 13 each independently represent a hydrocarbon group optionally having a substituent.

2 . The thermosetting composition according to claim 1 , wherein the crosslinking inhibitor contains the compound represented by the formula (1).

3 . The thermosetting composition according to claim 1 ,
wherein, in the formula (1), R 1 , R 2 , R 7 , and R 8 each represent a hydrogen atom, and R 3 to R 6 satisfy the following (i) or (ii): (i): R 3 and R 5 each independently represent an alkyl group, and R 4 and R 6 each represent a hydrogen atom, and (ii): R 3 and R 5 each represent a hydrogen atom, and R 4 and R 6 each independently represent an alkyl group.

4 . The thermosetting composition according to claim 1 , wherein, in the formula (1), the alkyl groups each independently have 1 to 12 carbon atoms.

5 . The thermosetting composition according to claim 1 , wherein the crosslinking inhibitor contains the compound represented by the formula (2).

6 . The thermosetting composition according to claim 1 , wherein, in the formula (2), R 11 to R 13 each independently represent an alkyl group optionally having a substituent or a phenyl group optionally having a substituent.

7 . The thermosetting composition according to claim 6 , wherein, in the formula (2), the alkyl groups each independently have 1 to 12 carbon atoms.

Assignees

• Nissan Chemical Corp

Inventors

• Okuno Takahisa
• Usui Yuki
• Yanai Masaki
• Shinjo Tetsuya

Classifications

• C09D183/04

  Polysiloxanes · CPC title

• C08L2205/05

  containing polymer components which can react with one another · CPC title

• C08L2205/025

  containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure · CPC title

• C08L83/04 Primary

  Polysiloxanes · CPC title

• C08K5/50

  Phosphorus bound to carbon only · CPC title