# US 12,759,294 B2 · Ink-repellent member, inkjet head, method for manufacturing ink-repellent member, and method for manufacturing inkjet head

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- Number: US 12,759,294 B2
- Document ID: US12759294B2
- Status: Granted
- Kind: B2
- Application number: 18/519,402
- Filed: 2023-11-27
- Published: 2024-06-27
- Granted: 2026-10-13
- Earliest claimed: 2022-12-07
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Yohei Miyauchi; Junri Ishikura; Tadahiro Mimura; Koji Sasaki
- Web page: https://patentgrep.com/patent/US12759294B2

## CPC

- B41J 2/1433: {Structure of nozzle plates}
- B41J 2/162: {Manufacturing of the nozzle plates}
- B41J 2/1623: {bonding and adhesion}
- C08G 77/46: containing polyether sequences
- C09D 5/1675: {Polyorganosiloxane-containing compositions}
- C09D 183/12: containing polyether sequences
- B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

An ink-repellent member includes a base and an ink-repellent film. The base includes at least one of silicon oxide and tantalum oxide. The ink-repellent film includes a fluorine compound chemically bonded to the base via at least a siloxane bond. The fluorine compound includes a fluorine compound A having a linear molecular structure and an average molecular weight of 1500 or more, and a fluorine compound B having a linear molecular structure and a smaller average molecular weight than the fluorine compound A. The fluorine compound A has a siloxane structure only at a one end of the linear molecular structure, and the fluorine compound B has a siloxane structure or a phosphonic acid structure only at a one end of the linear molecular structure.

## Claims

### Claim 1

An ink-repellent member, comprising:
a base including at least one selected from the group consisting of silicon oxide and tantalum oxide; and
an ink-repellent film including a fluorine compound chemically bonded to the base via at least a siloxane bond,
wherein the fluorine compound includes a fluorine compound A having a linear molecular structure and an average molecular weight of 1500 or more, and a fluorine compound B having a linear molecular structure and a smaller average molecular weight than the fluorine compound A,
wherein the fluorine compound A has a siloxane structure only at one end of the linear molecular structure, and
wherein the fluorine compound B has a siloxane structure only at one end of the linear molecular structure and is represented by structural formula (1):
wherein:
X is an OR group or a chloro group, and R is an alkyl group; and
n is an integer of 0 or more.

### Claim 2 (depends on 1)

The ink-repellent member according to claim 1, wherein the fluorine compound B has the average molecular weight of 1000 or less.

### Claim 3 (depends on 1)

The ink-repellent member according to claim 1, wherein the fluorine compound A has a main chain including a perfluoropolyether structure and has a CF3 group at an end.

### Claim 4 (depends on 1)

The ink-repellent member according to claim 1, wherein the fluorine compound B has a main chain including a perfluoroalkylene structure.

### Claim 5 (depends on 1)

The ink-repellent member according to claim 1, wherein the fluorine compound A has the average molecular weight of 4000 or more.

### Claim 6 (depends on 1)

The ink-repellent member according to claim 1, wherein the fluorine compound A includes at least one selected from the group consisting of repeating structures represented by structural formulas (2) to (5):

### Claim 7 (depends on 1)

The ink-repellent member according to claim 1, wherein a number of molecules of the fluorine compound A (NA) and a number of molecules of the fluorine compound B (NB) in the fluorine compound satisfy a relationship NA/(NA+NB)≤0.75.