Saccharide-alkyleneoxy derivative and ink

• US 20080163791A1
• Filed: 09/24/2007
• Published: 07/10/2008
• Est. Priority Date: 07/19/2000
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: YATAKE, Masahiro
• Granted Patent: US 7,888,406 B2
• Time in Patent Office: Days
• US Class Current: 106/31.68
• CPC Class Codes: C07H 15/08 Polyoxyalkylene derivatives
• CPC Class Codes: C09D 11/30 Inkjet printing inks

Abstract

A saccharide-alkyleneoxy derivative comprising a compound represented by the following formula (1):

A−(EP)n−OH  (1)

wherein A represents a skeleton of a saccharide selected from the group consisting of C₃ to C₃₂ aldoses, ketoses and sugar alcohols; EP represents an ethyleneoxy group and/or a propyleneoxy group; and n represents an average number of the repeating units. Also disclosed are a method for producing the saccharide alkyleneoxy derivative, and an ink containing the saccharide-alkyleneoxy derivative.

Claims

1-21. -21. (canceled)

22. Ink containing at least a coloring material, water, and a saccharide-alkyleneoxy derivative comprising a compound represented by the following formula (1):

A-EP)n-OH 

 

(1)

wherein A represents a skeleton of a saccharide selected from the group consisting of C₃ to C₁₂ aldoses, ketoses and sugar alcohols;

EP represents an ethyleneoxy group and/or a propyleneoxy group; and

n represents an average number of the repeating units, said ink further containing one or more C₃ to C₁₂ saccharides selected from the group consisting of;

aldoses having 6 or fewer carbon atoms, aldoses having from 7 to 12 carbon atoms;

ketoses having 6 or fewer carbon atoms, ketoses having from 7 to 12 carbon atoms;

sugar alcohols having from 6 or fewer carbon atoms, and sugar alcohols having from 7 to 12 carbon atoms, wherein the compound represented by formula (1) is present in the ink in an amount of from 4 to 10% by weight, wherein the ink contains at least one glycol ether selected from the group consisting of 5% to 20% by weight of diethylene glycol monobutyl ether, 5% to 20% by weight of triethylene glycol monobutyl ether, 3% to 10% by weight of dipropylene glycol monobutyl ether and 3.5% to 10% by weight of propylene glycol monobutyl ether, each based on the weight of said ink, wherein the ink also contains 3% to 10% by weight of 1,2-pentanediol or 0.5% to 5% by weight of 1,2-hexanediol, and wherein the coloring material is a water-soluble pigment that is made water-dispersible.

23. The ink according to claim 22, wherein the average number (n) of repeating units in said formula (1) is from 0.5 to 10.

24. The ink according to claim 22, wherein said saccharide-alkyleneoxy derivative has a molecular weight distribution of 2 or more.

25. The ink according to claim 22, wherein said saccharide-alkyleneoxy derivative has a number average molecular weight of 1000 or less.

26. The ink according to claim 22, wherein A in said formula (1) is a skeleton of a saccharide selected from the group consisting of:

aldoses having 6 or fewer carbon atoms, aldoses having from 7 to 12 carbon atoms, keloses having 6 or fewer carbon atoms, sugar alcohols having 6 or fewer carbon atoms, and sugar alcohols having from 7 to 12 carbon atoms.

27. The ink according to claim 22, wherein said saccharide-alkyleneoxy derivative represented by formula (1) and said C₃ to C₁₂ saccharides are present, in total, in an amount of from 0.5% to 30% by weight based on the weight of said ink.

28. The ink according to claim 22, wherein said ink has a surface tension at 25°

C. of 40 mN/mor less.

29. The ink according to claim 22, containing an acetylene glycol surfactant in an amount of 0% to 5% by weight based on the weight of said ink.

30. The ink according to claim 22, containing at last one substance represented by formula (2) below in an amount of 0% to 10% by weight based on the weight of said ink:

R-(EP)m-OH 

 

(2)

wherein R represents an alkyl group having from 4 to 10 carbon atoms, which may be branched, a cycloalkyl group or a phenyl group;

EP represents an ethyleneoxy group and/or a propyleneoxy group; and

m represents an average number of the repeating units.

31. The ink according to claim 30, wherein the average number (m) of the repeating units in the substance represented by said formula (2) is from 1 to 10 and, when propyleneoxy groups represented by EP exist, the average number of repeating units of propyleneoxy groups is from 0.5 to 5.

33. The ink according to claim 22, wherein said pigment is made water dispersible by at least one of surface oxidation and coating with a polymer.

34. A method for jet recording comprising providing the ink according to claim 22, and ejecting the ink onto a recording medium.

35. A method for ink jet recording comprising providing the ink according to claim 22 and ejecting said ink from an ink jet recording apparatus having a head which discharges the ink in response to a signal using an electrostrictive device.

36. The ink according to claim 22, wherein the one or more C₃ to C₁₂ saccharides comprise glycerol.

37. The ink according to claim 22, wherein the one or more C₃ to C₁₂ saccharides are present in the ink in an amount of from 3-15 wt %.