INK COMPOSITIONS

• US 20170081531A1
• Filed: 05/06/2015
• Published: 03/23/2017
• Est. Priority Date: 05/06/2014
• Status: Abandoned Application

• Current Assignee: ImerTech SAS
• Original Assignee: Imerys Minerals Limited (Parjointco N.V.)
• Inventors: Legrix, Anabelle Huguette Renee, FOOKS, James Alfred, COE, Alexander James
• Application Number:
  US15/309,134
• Publication Number:
  US 20170081531A1
• Time in Patent Office: Days
• CPC Class Codes: B41F 7/02 for offset printing
• CPC Class Codes: C09D 11/03 characterised by features other than the chemical nature of the binder
• CPC Class Codes: C09D 11/037 characterised by the pigment

Abstract

Ink compositions comprising a carrier and an inorganic particulate additive are described. The ink composition comprises a liquid carrier and an inorganic particulate additive, wherein bleeding of the additive into a fount solution in offset printing is reduced. The inorganic particulate additive has a washout factor, representing the extent of bleeding in offset printing use, of less than about 0.70.

Claims

1. An ink composition comprising a liquid carrier and an inorganic particulate additive, wherein the inorganic particulate additive has a washout factor of less than about 0.70.

2. The ink composition according to claim 1, wherein the ink composition further comprises a flocculant.

4. The ink composition according to claim 2, wherein the flocculant is present in the ink composition in an amount of at least about 0.05% by weight of the inorganic particulate additive.

5. The ink composition according to claim 2, wherein the flocculant comprises a multivalent cation.

6. The ink composition according to claim 2, wherein the flocculent comprises an ionene polymer.

7. The ink composition according to claim 2, wherein the flocculent is selected from aluminium sulphate and 1,2-ethanediamine polymer with (chloromethyl)oxirane and N-methylmethanamine.

8. The ink composition according to claim 1, wherein the inorganic particulate additive is provided with a hydrophobic coating.

12. A method of manufacturing an ink composition according to claim 1, comprising combining the liquid carrier, the inorganic particulate additive, and optionally the flocculant.

13. A method of reducing bleeding of an inorganic particulate additive from an ink composition, comprising using a fount solution during offset printing, wherein the fount solution comprises the ink composition of claim 2.

14. An ink composition according to claim 1, wherein the inorganic particulate additive is a clay, for example kaolin,

15. A method of using an ink composition, comprising providing an ink composition according to claim 1 and using the ink composition in offset printing.

3. An ink composition comprising a liquid carrier, an inorganic particulate additive, and a flocculant, wherein the inorganic particulate additive and flocculant are a flocculated inorganic particulate additive.

9. An ink composition comprising a liquid carrier and an inorganic particulate additive, wherein particles of the inorganic particulate additive are provided with a hydrophobic coating.

10. The ink composition according to claim 9, wherein the hydrophobic coating is covalently bonded to the inorganic particulate additive.

11. The ink composition according to claim 10, wherein the hydrophobic coating comprises a silane, for example octyl silane or vinyl silane, or an amine, for example octadecylamine.