Composite materials from charged or functionalized latexes for inkjet applications

• US 8,313,808 B2
• Filed: 12/19/2007
• Issued: 11/20/2012
• Est. Priority Date: 12/21/2006
• Status: Expired due to Fees

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Friour, Gerard A., Desrousseaux, Stephanie V., Poncelet, Olivier J.
• Primary Examiner(s): Empie, Nathan
• Assistant Examiner(s): Jiang, Lisha
• Application Number:
  US12/517,288
• Publication Number:
  US 20100075042A1
• Time in Patent Office: 1,798 Days
• Field of Search: None
• US Class Current: 427/288
• CPC Class Codes: B41M 5/52 Macromolecular coatings
• CPC Class Codes: B41M 5/5218 characterised by inorganic additives, e.g. pigments, clays
• CPC Class Codes: B41M 5/5245 characterised by the use of polymers containing cationic or anionic groups, e.g. mordants
• CPC Class Codes: B41M 5/5254 characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• CPC Class Codes: C08F 257/02 on to polymers of styrene or alkyl-substituted styrenes
• CPC Class Codes: C08F 265/04 on to polymers of esters
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence

Abstract

An inkjet receiver comprising a support and one or more layers coated on the support, at least one of which comprises a particulate material and a binder, the particulate material comprising composite particles having an inner portion and an outer portion or core-shell arrangement, wherein the inner portion comprises a negatively-charged, positively-charged or functionalized latex, and the outer portion comprises an inorganic material having enhanced keeping properties and reduced ozone-induced dye fade.

Claims

1. An inkjet receiver comprising a support and one or more layers coated on the support, at least one of which comprises a particulate material and a binder, the particulate material comprising composite particles having an inner portion and an outer portion, wherein the inner portion comprises an organic polymer material comprising latex particles selected from a functionalized latex, and the outer portion comprises an inorganic material having enhanced keeping properties, wherein the composite particles are core-shell particles where the inner portion is the core and the outer portion is the shell, the core-shell particles comprising

a core comprising an organic polymer which is a functionalized latex;

and

a shell comprising an oligomeric or polymeric metal oxide, the oligomeric or polymeric metal oxide being covalently bound to the latex via a linker group.

2. An inkjet receiver as claimed in claim 1, wherein the linker group comprises a terminal -M-O—

group, wherein the M represents a metal, which may be the same as or different from the metal of the oligomeric or polymeric metal oxide and the O group is an oxygen, which is linked to the oligomeric or polymeric metal oxide.

3. An inkjet receiver as claimed in claim 2, wherein the terminal -M-O—

group is a —

Si—

O—

group.

4. An inkjet receiver as claimed in claim 1, wherein the linker group is obtainable by reacting a metal oxide-reactive functionalized group on a functionalized organic polymer material with an activated metal oxide.

5. An inkjet receiver as claimed in claim 4, wherein the metal oxide-reactive functionalized group comprises a silicon hydroxide terminal moiety.

6. An inkjet receiver as claimed in claim 1, wherein the oligomeric or polymeric metal oxide is an acid-catalysed silica polymer.

7. An inkjet receiver as claimed in claim 1, wherein the outer portion or shell is present in an amount of from 10% to 40% by weight of the composite particle.

8. An inkjet receiver comprising a support and one or more layers coated on the support, at least one of which comprises a particulate material and a binder, the particulate material comprising composite particles having an inner portion and an outer portion, wherein the inner portion comprises an organic polymer material comprising latex particles selected from a functionalized latex, and the outer portion comprises an inorganic material having enhanced keeping properties, the particulate material comprising core-shell particles, the core-shell particles having:

a core comprising an organic polymer comprising a functionalized latex; and

a shell comprising an oligomeric or polymeric metal oxide, the oligomeric or polymeric metal oxide being covalently bound to the latex material via a linker group, the core-shell particles being obtainable by reacting a functionalized latex with a metal oxide in the presence of a metal oxide polymerization catalyst.

9. An inkjet receiver as claimed in claim 8, wherein the outer portion or shell is present in an amount of from 10% to 40% by weight of the composite particle.

10. A method of manufacturing an inkjet receiver, the method comprising providing a support and coating at least one layer of a coating composition onto the support and drying the coated support, said composition comprising a dispersion of a particulate material and a binder in a coating medium, the particulate material comprising composite particles having an inner portion and an outer portion, wherein said inner portion comprises an organic polymer material comprising latex particles selected from a functionalized latex, and said outer portion comprises an inorganic material having enhanced keeping properties, wherein the composite particles are core-shell particles where the inner portion is the core and the outer portion is the shell, the core-shell particles comprising a core comprising an organic polymer which is a functionalized latex, and a shell comprising an oligomeric or polymeric metal oxide, the oligomeric or polymeric metal oxide being covalently bound to the latex via a linker group.

11. A method of printing, which comprises the steps of:

(a) providing an inkjet printer that is responsive to digital data signals;

(b) loading the inkjet printer with an inkjet receiver comprising a support and one or more layers coated on said support, at least one of which comprises a particulate material and a binder, said particulate material comprising composite particles having an inner portion and an outer portion, wherein said inner portion comprises an organic polymer material comprising latex particles selected from a functionalized latex, and said outer portion comprises an inorganic material having enhanced keeping properties, wherein the composite particles are core-shell particles where the inner portion is the core and the outer portion is the shell, the core-shell particles comprising a core comprising an organic polymer which is a functionalized latex, and a shell comprising an oligomeric or polymeric metal oxide, the oligomeric or polymeric metal oxide being covalently bound to the latex via a linker group;

(c) loading the inkjet printer with a inkjet ink; and

(d) printing on the inkjet receiver using the inkjet ink in response to digital data signals.

12. A method of printing as claimed in claim 11, wherein the outer portion or shell is present in an amount of from 10% to 40% by weight of the composite particle.