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US 6,702,884 B2Granted
Pigmented hot melt inks
AssigneeMarkem Corporation
InventorBenjamin J. Brown
Life of this patent
Estimating the term…
Abstract
This invention features a hot melt ink composition. The composition includes a vehicle; a pigment having a modifying group on a surface of the pigment; and a polymeric dispersant including a group which associates with the modified surface and a backbone which is miscible with the vehicle.
Claims35
A hot melt ink composition comprising:
- a vehicle;
- a pigment having a surface including a modifying group;
- and
- a polymeric dispersant including a group which associates with the modifying group and a backbone which is miscible with the vehicle.
1 more element
A hot melt ink composition comprising:
- a vehicle;
- a pigment having a volatile content at least 10%;
- and
- a polymeric dispersant including a group which associates with the pigment and a backbone which is miscible with the vehicle.
1 more element
A hot melt ink composition comprising:
- a vehicle having a melting point at a temperature ranging from 50° C. to 150° C.;
- a pigment having a volatile content at least 10% and a surface including an oxygen-containing functionality;
- and
- a polymeric dispersant including a copolymer of a polyamine and a fatty acid.
1 more element
A process for preparing a hot melt ink composition, comprising:
- heating a hot melt ink including a vehicle, a pigment having a surface including a modifying group, and a polymeric dispersant including a group which associates with the modifying group and a backbone which is miscible with the vehicle;
- and
- filtering the heated hot melt ink through a one micron filter.
Dependencies are inferred from the claim text.