Treatment agent and ink set

Patent metadata

Field	Value
Publication number	US-11001964-B2
Application number	US-201816059472-A
Country	US
Kind code	B2
Filing date	Aug 9, 2018
Priority date	Sep 29, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

There is provided a treatment agent applicable to a recording surface of a recording medium which is recording paper or fabric. The treatment agent contains: a non-cationic sizing agent; and at least one cationic substance which is selected from the group consisting of: a cationic polymer capable of forming a flexible film in a case that the cationic polymer is dried, a cationic surfactant, a polyvalent metal salt and a polyvalent metal ion.

First claim

What is claimed is:

1. A treatment agent applicable to a recording surface of a recording medium which is recording paper or fabric, the treatment agent comprising:
a non-cationic sizing agent; and
at least one cationic substance which is selected from the group consisting of: a cationic polymer capable of forming a flexible film in a case that the cationic polymer is dried, and a cationic surfactant,
wherein the cationic polymer is a cationic polymer having a urethane structure or a water-soluble polymer having diallylamines represented by the following formula (2) as a constituent of the water-soluble polymer:

wherein in the formula (2), R 2 and R 3 are each a substituted or non-substituted, straight-chain or branched-chain alkyl group, and the R 2 and the R 3 are identical with each other or different from each other;
X − is an anion, and
wherein a number of the constituent represented by the formula (2) in the water-soluble polymer is in a range of 5 to 1000.

2. The treatment agent according to claim 1 , wherein a blending amount of the cationic substance in an entire amount of the treatment agent is in a range of 1% by weight to 15% by weight.

3. The treatment agent according to claim 1 , wherein a blending amount of the cationic substance in an entire amount of the treatment agent is in a range of 10% by weight to 15% by weight.

4. The treatment agent according to claim 1 , wherein the cationic polymer is the cationic polymer having a urethane structure.

5. The treatment agent according to claim 4 , wherein a ratio of the urethane structure is not less than 10% by weight in the cationic polymer having the urethane structure.

6. The treatment agent according to claim 4 , wherein the treatment agent contains an emulsion of the cationic polymer having the urethane structure.

7. The treatment agent according to claim 4 , wherein the cationic polymer having the urethane structure further has at least one of an acrylic structure and a styrene structure.

8. The treatment agent according to claim 7 , wherein the cationic polymer having the urethane structure has the acrylic structure.

9. The treatment agent according to claim 4 , wherein the urethane structure is obtained by:
an aliphatic isocyanate; and
a polyether polyol or polyester polyol.

10. The treatment agent according to claim 1 , wherein the cationic polymer is the water-soluble polymer having diallylamines represented by the formula (2) as a constituent of the water-soluble polymer.

11. The treatment agent according to claim 10 , wherein the R 2 and the R 3 in the formula (2) are each a methyl group; and
the X − is a methylsulfate ion or a chloride ion.

12. The treatment agent according to claim 1 , wherein a blending amount of the non-cationic sizing agent in an entire amount of the treatment agent is in a range of 0.2% by weight to 10% by weight.

13. The treatment agent according to claim 1 , wherein a blending amount of the non-cationic sizing agent in an entire amount of the treatment agent is in a range of 1% by weight to 5% by weight.

14. The treatment agent according to claim 1 , wherein the non-cationic sizing agent is at least one selected from the group consisting of: sodium alginate, pregelatinized starch and carboxymethyl cellulose.

15. The treatment agent according to claim 1 , wherein a ratio (X/Y) of a blending amount (X: % by weight) of the cationic substance to a blending amount (Y: % by weigh) of the non-cationic sizing agent is in a range of 3.3 to 5.

16. The treatment agent according to claim 1 , wherein in a case that the recording medium is the recording paper, an application amount of the treatment agent per unit area of the recording surface is not more than 1.3 mg/cm 2 ; and
in a case that the recording medium is the fabric, the application amount of the treatment agent per the unit area of the recording surface is in a range of 5.0 mg/cm 2 to 48 mg/cm 2 .

17. A treatment agent applicable to a recording surface of a recording medium which is recording paper or fabric, the treatment agent comprising:
a non-cationic sizing agent; and
at least one cationic substance which is selected from the group consisting of: a cationic polymer capable of forming a flexible film in a case that the cationic polymer is dried, a cationic surfactant, a polyvalent metal salt and a polyvalent metal ion,
wherein in a case that the recording medium is the fabric, the non-cationic sizing agent applied to the recording surface is washed by water.

18. An ink set comprising:
a water-based ink for ink-jet recording containing an anionic coloring agent and water; and
the treatment agent as defined in claim 1 .

Assignees

• Brother Ind Ltd

Inventors

• Taga Yasuhiro
• Yuhara Keisuke
• Maeda Mitsunori
• Ito Shinpei

Classifications

• C09D11/322 Primary

  Pigment inks · CPC title

• D06P1/6556

  Compounds containing phosphonium groups · CPC title

• D06P1/6553

  Compounds containing sulfonium groups · CPC title

• D06P1/48

  Derivatives of carbohydrates · CPC title

• D06P1/46

  using compositions containing natural macromolecular substances or derivatives thereof · CPC title