Ink, ink set, ink container, image forming method, image forming apparatus and recorded matter

Patent metadata

Field	Value
Publication number	US-11274221-B2
Application number	US-201816169621-A
Country	US
Kind code	B2
Filing date	Oct 24, 2018
Priority date	Dec 15, 2017
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

An ink includes at least one polyether-modified siloxane compound, and at least one aliphatic alcohol alkylene oxide compound. The mass ratio of the polyether-modified siloxane compound to the aliphatic alcohol alkylene oxide compound in the ink is from 95/5 to 50/50.

First claim

What is claimed is:

1. An ink, comprising:
at least one polyether-modified siloxane compound; and
at least one aliphatic alcohol alkylene oxide compound;
wherein a mass ratio of the polyether-modified siloxane compound to the aliphatic alcohol alkylene oxide compound in the ink is from 95/5 to 65/35.

2. The ink of claim 1 ,
wherein a total proportion of the polyether-modified siloxane compound and the aliphatic alcohol alkylene oxide compound by mass ranges from 0.01% to 3.0% relative to a total mass of the ink.

3. The ink of claim 1 ,
wherein the polyether-modified siloxane compound is at least one compound represented by formula I:

where m represents 0 or an integer of from 1 to 23, n represents an integer of from 1 to 10, and k represents 0 or an integer of from 1 to 7, a represents an integer of from 1 to 23, b represents 0 or an integer of from 1 to 23, and R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.

4. The ink of claim 3 ,
wherein the compound represented by formula I is a compound represented by any one of the following formulae II to V:

where a represents an integer of from 2 to 17,

where a represents an integer of from 2 to 17,

where m represents 0 or an integer of from 1 to 5, n represents an integer of from 1 to 2, and a represents an integer of from 3 to 17,

where, m+k represents 0 or an integer of from 1 to 7, n represents an integer of from 1 to 2, and a represents an integer of from 2 to 16.

5. The ink of claim 1 ,
wherein the aliphatic alcohol alkylene oxide compound is at least one compound represented by formula VI or at least one compound represented by formula XII:

where R represents an alkyl group having 8 to 13 carbon atoms, R 1 represents a hydrogen atom or a methyl group, and n represents an integer of from 2 to 12,

where R 2 represents an aliphatic hydrocarbon group having 6 to 10 carbon atoms, n represents a number of from 0 to 6 representing an average adduct number of propylene oxide, k represents a number of from 0 to 8 representing an average adduct number of ethylene oxide, and a total number of the propylene oxide and the ethylene oxide satisfies the following relation: 3≤n+k≤14.

6. The ink of claim 1 ,
wherein the mass ratio of the polyether-modified siloxane compound to the aliphatic alcohol alkylene oxide compound is from 90/15 to 75/30.

7. A ink set, comprising:
a yellow ink;
a magenta ink; and
a cyan ink,
wherein the yellow ink, the magenta ink, and the cyan ink are each independently the ink of claim 1 .

8. The ink set of claim 7 , further comprising:
a black ink, which is also the ink of claim 1 .

9. An ink container, comprising:
the ink of claim 1 , and
a vessel to accommodate the ink.

10. An image forming method, comprising:
applying the ink of claim 1 to a recording medium.

11. An image forming apparatus, comprising:
the ink of claim 1 ; and
an applying device configured to apply the ink to a recording medium.

12. A recorded matter, comprising:
a printed layer comprising at least one polyether-modified siloxane compound and at least one aliphatic alcohol alkylene oxide compound,
wherein a mass ratio of the polyether-modified siloxane compound to the aliphatic alcohol alkylene oxide compound in the printed layer is from 95/5 to 65/35.

Assignees

• Ricoh Co Ltd

Inventors

• Umemura Kazuhiko
• Yokohama Yuuki
• Matsuyama Akihiko
• SAGARA Amika
• Kudo Masaki
• Yoshihara Mayumi
• Sugita Kento

Classifications

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• C09D183/12

  containing polyether sequences · CPC title

• C09D11/322

  Pigment inks · CPC title

• C09D11/102 Primary

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• C09D11/40

  Ink-sets specially adapted for multi-colour inkjet printing · CPC title