CA2407498A1 - Self-dispersing pigment and process of making and use of same - Google Patents

Self-dispersing pigment and process of making and use of same Download PDF

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Publication number
CA2407498A1
CA2407498A1 CA002407498A CA2407498A CA2407498A1 CA 2407498 A1 CA2407498 A1 CA 2407498A1 CA 002407498 A CA002407498 A CA 002407498A CA 2407498 A CA2407498 A CA 2407498A CA 2407498 A1 CA2407498 A1 CA 2407498A1
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CA
Canada
Prior art keywords
pigment
ozone
self dispersing
colorant
mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002407498A
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French (fr)
Other versions
CA2407498C (en
Inventor
An-Gong Yeh
Michael J. Eiseman
Robert Paul Held
James L. Hohman
Dhiren V. Patel
Yia-Ching Ray
Harry Joseph Spinelli
Sandra L. Witman
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EIDP Inc
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Individual
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Publication of CA2407498A1 publication Critical patent/CA2407498A1/en
Application granted granted Critical
Publication of CA2407498C publication Critical patent/CA2407498C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
    • C09C3/04—Physical treatment, e.g. grinding, treatment with ultrasonic vibrations
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK  ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
    • C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
    • C09C1/44—Carbon
    • C09C1/48—Carbon black
    • C09C1/56—Treatment of carbon black ; Purification
    • C09C1/565—Treatment of carbon black ; Purification comprising an oxidative treatment with oxygen, ozone or oxygenated compounds, e.g. when such treatment occurs in a region of the furnace next to the carbon black generating reaction zone
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
    • C09B67/0001—Post-treatment of organic pigments or dyes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/22—Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability

Abstract

A process is provided in which a pigment is oxidated with ozone in an aqueous environment in which the mixture of ozone, water and pigment is subjected to a dispersive mixing operation;
and/or the pH of the mixture is maintained in a range of 6-8, whereby the pigment is self-dispersing and preferably has an acid value of less than 3µmoles/M2. Pigments from this process and ink jet inks containing the self-dispersing pigments, are also provided.

Claims (42)

1. A process for malting a self dispersing pigment comprising the step of oxidizing the pigment with ozone in an aqueous environment while simultaneously subjecting the pigment to at least one dispersive mixing operation.
2. The process of claim 1, wherein the pigment is present in an amount of up to 50% by weight.
3. The process of claim 2, wherein the pigment is present in an amount of 5 to 20% by weight.
4. The process of claim 1, wherein the aqueous environment includes hydrogen peroxide.
5. The process of claim 1, wherein the ozone comprises 1 to 20% by weight ozone in a carrier gas.
6. The process of claim 5 wherein the ozone comprises 6% by weight ozone in oxygen.
7. The process of claim 1, wherein the pigment is carbon black.
8. The process of claim 1 wherein the pigment is am organic colored pigment.
9. The process of claim 1, wherein the process further includes a pre-mixing operation.
10. The process of claim 9, wherein the pre-mixing operation comprises agitating the mixture in a high speed dispersing apparatus.
11. The process of claim 1, wherein the process is carried out at a pH of 6 to 8.
12. The process of claim l, wherein the aqueous environment being an aqueous medium and ozone are mixed together prior to introduction of the pigment.
13. The process of claim 12, wherein the pigment is not introduced to the aqueous medium/ozone mixture all at once.
14. The process of claim 1, wherein the self dispersing pigment has an acid value of less than 3 µ,moles/M2.
15. The process of claim 1, wherein the dispersive mixing operation comprises media milling and passing the mixture through a plurality of nozzles within a liquid jet interaction chamber at a liquid pressure of at least 1000 psi.
16. The process of claim 1, further comprising the step of purifying the self dispersing pigment.
17. A process of malting a self dispersing pigment comprising the step of oxidizing the pigment with ozone in an aqueous medium while maintaining a pH of 6 to 8.
18. The process of claim 17, wherein the pH is maintained by addition of a base.
19. The process of claim 18, wherein the base is selected from the group consisting of potassium hydroxide and sodium hydroxide.
20. The process of claim 17, wherein the pigment is present in an amount of 5 to 20% by weight.
21. The process of claim 17, wherein the aqueous medium includes hydrogen peroxide.
22. The process of claim 17, wherein the ozone comprises 6% by weight ozone m oxygen.
23. The process of claim 17, wherein the pigment is carbon black.
24. The process of claim 17, wherein the pigment is an organic colored pigment.
25. The process of claim 17, wherein the process further comprises subjecting the mixture of ozone, pigment and aqueous medium to a pre-mixing operation which comprises agitating the mixture in a high speed dispersing apparatus.
26. The process of claim 17, wherein the aqueous medium and ozone are mixed together prior to introduction of the pigment.
27. The process of claim 17, wherein the pigment is not introduced to the aqueous medium/ozone mixture all at once.
28. The process of claim 17, wherein the process further comprises a dispersive mixing operation which comprises subjecting the mixture of ozone, pigment and aqueous medium to an operation selected from the groups consisting of media milling and passing the mixture through a plurality of nozzles within a liquid jet interaction chamber at a liquid pressure of at least 1000 psi.
29. The process of claim 17, wherein the self dispersing pigment has an acid value of less than 3 µmoles/M2.
30. The process of claim 17, further comprising the step of purifying the self dispersing pigment.
31. A process for malting a self dispersing pigment comprising the step of oxidizing the pigment with ozone in an aqueous medium to produce a pigment having an acid value of less than 3 µmoles./M2.
32. A self dispersing pigment prepared according to the process of claim 1.
33. A self dispersing pigment prepared according to the process of claim 17.
34. A self dispersing pigment prepared according to the process of claim 31.
35. An ink jet ink composition comprising an aqueous vehicle and a colorant, wherein the colorant comprises a self dispersing pigment according to claim 32.
36. The ink composition of claim 35, further comprising at least one additive selected from the group consisting of surfactants, humectants, biocides, sequestering agents, viscosity modifiers, and polymeric binders.
37. An ink jet ink composition comprising an aqueous vehicle and a colorant, wherein the colorant comprises a self dispersing pigment prepared according to claim 33.
38. The ink composition of claim 37, further comprising at least one additive selected from the group consisting of surfactants, humectants, biocides, sequestering agents, viscosity modifiers, and polymeric binders.
39. An ink jet ink composition comprising an aqueous vehicle and a colorant, wherein the colorant comprises a self dispersing pigment according to claim 34.
40. The ink composition of claim 39, further comprising at least one additive selected from the group consisting of surfactants, humectants, biocides, sequestering agents, viscosity modifiers, and polymeric binders.
41. An ink concentrate composition comprising an aqueous vehicle and a colorant wherein the colorant comprises a self dispersing pigment according to claim 32 wherein the pigment has a mean particle size of less than 0.2 microns and has a charge density measured by zeta potential lower than -50 mv.
42. An ink concentrate composition comprising an aqueous vehicle and a colorant wherein the colorant comprises a self dispersing pigment according to claim 32 wherein the pigment has has a conductivity of less than 0.15 S/m (Seimen/meter) and counter ions of less than 0.15 moles per liter.
CA2407498A 2000-06-05 2001-06-05 Self-dispersing pigment and process of making and use of same Expired - Lifetime CA2407498C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US20971800P 2000-06-05 2000-06-05
US60/209,718 2000-06-05
PCT/US2001/018180 WO2001094476A2 (en) 2000-06-05 2001-06-05 Self-dispersing pigment and process of making and use of same

Publications (2)

Publication Number Publication Date
CA2407498A1 true CA2407498A1 (en) 2001-12-13
CA2407498C CA2407498C (en) 2010-02-16

Family

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Family Applications (1)

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CA2407498A Expired - Lifetime CA2407498C (en) 2000-06-05 2001-06-05 Self-dispersing pigment and process of making and use of same

Country Status (12)

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US (1) US6852156B2 (en)
EP (1) EP1287081B1 (en)
JP (1) JP5424520B2 (en)
KR (1) KR20030014687A (en)
CN (2) CN1240783C (en)
AT (1) ATE386085T1 (en)
AU (2) AU2001268184B2 (en)
CA (1) CA2407498C (en)
DE (1) DE60132766T2 (en)
MX (1) MXPA02012007A (en)
TW (1) TWI293084B (en)
WO (1) WO2001094476A2 (en)

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