Liquid discharge head, method for producing the same, liquid discharge apparatus, and image forming apparatus

Patent metadata

Field	Value
Publication number	US-10589528-B2
Application number	US-201916289152-A
Country	US
Kind code	B2
Filing date	Feb 28, 2019
Priority date	Mar 15, 2018
Publication date	Mar 17, 2020
Grant date	Mar 17, 2020

Abstract

A liquid discharge head including: a flow path formation part in which pressure generation chambers are arranged; and a pressure generation unit configured to apply pressure to the pressure generation chambers, wherein the pressure generation unit is formed by joining a vibration unit to the flow path formation part with a resin layer, and wherein the resin layer includes a curable resin composition including (A) an epoxy resin, (B) a polythiol compound, (C) at least one adhesiveness-imparting agent selected from the group consisting of a compound represented by General Formula (1), a titanium compound represented by General Formula (2-1), and a titanium compound represented by General Formula (2-2), and (D) a curing accelerator.

First claim

What is claimed is:

1. A liquid discharge head comprising:
a flow path formation part in which pressure generation chambers are arranged; and
a pressure generation unit configured to apply pressure to the pressure generation chambers,
wherein the pressure generation unit is formed by joining a vibration unit to the flow path formation part with a resin layer, and
wherein the resin layer includes a curable resin composition including (A) an epoxy resin, (B) a polythiol compound, (C) at least one adhesiveness-imparting agent selected from the group consisting of a compound represented by General Formula (1) below, a titanium compound represented by General Formula (2-1) below, and a titanium compound represented by General Formula (2-2) below, and (D) a curing accelerator,

where in the General Formula (1), X 1 , X 2 , X 3 , and X 4 each independently represent a single bond, O, S, C(CH 3 ) 2 , CO, CO 2 , or SO 2 , Y 1 and Y 2 each independently represent H, Cl, or OH, and a represents an integer of from 1 through 10,000,

where in the General Formula (2-1) and the General Formula (2-2), R 1 , R 2 , R 3 , and R 4 each independently represent an unsubstituted alkyl group having from 1 through 10 carbon atoms, an alkyl group having from 1 through 10 carbon atoms and substituted with a hydroxyl group, or a group represented by General Formula (2-3) below, b and c each independently represent an integer of from 1 through 3, and b+c=4,

where in the General Formula (2-3), R 5 represents an alkyl group having from 1 through 6 carbon atoms.

2. The liquid discharge head according to claim 1 ,
wherein (A) the epoxy resin is at least one selected from an alkylene oxide-modified epoxy resin of a polynuclear polyvalent phenol compound, diglycidyl ether of dicyclopentadiene dimethanol, and an epoxy compound containing a glycidylamino group.

3. The liquid discharge head according to claim 1 ,
wherein (B) the polythiol compound is at least one selected from the group consisting of a thiol compound having two mercapto groups in a molecule thereof and a thiol compound having three or more mercapto groups in a molecule thereof.

4. The liquid discharge head according to according to claim 1 ,
wherein the adhesiveness-imparting agent as the (C) is the compound represented by General Formula (1), and at least one selected from the group consisting of the titanium compound represented by General Formula (2-1) and the titanium compound represented by General Formula (2-2).

5. The liquid discharge head according to according to claim 1 ,
wherein the compound represented by General Formula (1) is polyethersulfone.

6. The liquid discharge head according to according to claim 1 ,
wherein (A) the epoxy resin includes at least one epoxy resin selected from the group consisting of (E) an alkylene oxide-modified epoxy resin of a polynuclear polyvalent phenol compound, (F) a diglycidyl ether of dicyclopentadiene dimethanol, and (G) an epoxy compound containing a glycidylamino group, and a content of the at least one epoxy resin is 10 parts by mass or more relative to a total content of (A) the epoxy resin of 100 parts by mass.

7. The liquid discharge head according to according to claim 1 ,
wherein the resin layer includes a cured product obtained by curing the curable resin composition.

8. A method for producing a liquid discharge head including: a flow path formation part in which pressure generation chambers are arranged; and a pressure generation unit configured to apply pressure to the pressure generation chambers, the method comprising
joining a vibration unit to the flow path formation part with a resin layer to form the pressure generation unit,
wherein the resin layer includes a curable resin composition including (A) an epoxy resin, (B) a polythiol compound, (C) at least one adhesiveness-imparting agent selected from the group consisting of a compound represented by General Formula (1) below, a titanium compound represented by General Formula (2-1) below, and a titanium compound represented by General Formula (2-2) below, and (D) a curing accelerator,

where in the General Formula (1), X 1 , X 2 , X 3 , and X 4 each independently represent a single bond, O, S, C(CH 3 ) 2 , CO, CO 2 , or SO 2 , Y 1 and Y 2 each independently represent H, Cl, or OH, and a represents an integer of from 1 through 10,000,

where in the General Formula (2-1) and the General Formula (2-2), R 1 , R 2 , R 3 , and R 4 each independently represent an unsubstituted alkyl group having from 1 through 10 carbon atoms, an alkyl group having from 1 through 10 carbon atoms and substituted with a hydroxyl group, or a group represented by General Formula (2-3) below, b and c each independently represent an integer of from 1 through 3, and b+c=4,

where in the General Formula (2-3), R 5 represents an alkyl group having from 1 through 6 carbon atoms.

9. A liquid discharge apparatus comprising
the liquid discharge head according to claim 1 .

10. An image forming apparatus comprising:
a housing unit configured to house an inkjet ink; and
a liquid discharge head configured to apply a stimulus to the inkjet ink to discharge the ink and print an image on a print medium,
wherein the liquid discharge head includes:
a flow path formation part in which pressure generation chambers are arranged; and
a pressure generation unit configured to apply pressure to the pressure generation chambers,
wherein the pressure generation unit is formed by joining a vibration unit to the flow path formation part with a resin layer, and
wherein the resin layer includes a curable resin composition including (A) an epoxy resin, (B) a polythiol compound, (C) at least one adhesiveness-imparting agent selected from the group consisting of a compound represented by General Formula (1) below, a titanium compound represented by General Formula (2-1) below, and a titanium compound represented by General Formula (2-2) below, and (D) a curing accelerator,

where in the General Formula (1), X 1 , X 2 , X 3 , and X 4 each independently represent a single bond, O, S, C(CH 3 ) 2 , CO, CO 2 , or SO 2 , Y 1 and Y 2 each independently represent H, Cl, or OH, and a represents an integer of from 1 through 10,000,

where in the General Formula (2-1) and the General Formula (2-2), R 1 , R 2 , R 3 , and R 4 each independently represent an unsubstituted alkyl group having from 1 through 10 carbon atoms, an alkyl group having from 1 through 10 carbon atoms and substituted with a hydroxyl group, or a group represented by General Formula (2-3) below, b and c each independently represent an integer of from 1 through 3, and b+c=4,

Assignees

• Sameshima Tatsuya
• Habashi Hisashi
• Chiba Ryota
• Ricoh Co Ltd

Inventors

• Sameshima Tatsuya
• Habashi Hisashi
• Chiba Ryota

Classifications

• C08K2201/014

  Additives containing two or more different additives of the same subgroup in C08K · CPC title

• C08L63/00

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

• C08G59/245

  aromatic · CPC title

• C08K5/37

  Thiols · CPC title

• B41J2/14274

  of stacked structure type, deformed by compression/extension and disposed on a diaphragm · CPC title