Ink compositions
AssigneeLexmark International, Inc.
InventorsBradley Leonard Beach, Ann P. Holloway, Ajay Kanubhai Suthar
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Abstract
The present invention relates to ink compositions. More particularly, the present invention relates to ink compositions comprising a colorant and a polymeric binder having a below ambient glass transition temperature, an average particle diameter above about 200 nm and an acid component ranging from about 1% to about 10% by weight of the polymeric binder. Additionally, the present invention has the novel and useful feature of resistance to both wet-rub and dry smear as well as increased highlighter resistance and decreased occurrences of maintenance problems such as clogging and kogation.
Claims28
An ink comprising:
- a. an aqueous carrier;
- b. a colorant;
- and
- c. a polymeric binder having a glass transition temperature ranging from about −20° C. to 10° C., an average particle diameter ranging from 250 nm to about 400 nm and an acid component ranging from about 1% to about 10% by weight of said binder.
An ink comprising:
- a. an aqueous carrier;
- b. a colorant;
- and
- c. a polymeric binder consisting essentially of one or more monomers selected from the group consisting of acrylates, methacrylates, substituted styrenes, styrenes, fluoromethacrylates, vinyl acrylates, vinyl acetates, acrylamides, substituted acrylamides, methacrylamides and substituted methacrylamides and an acid component selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acids, vinylsulfonic acids and acids derived from methacrylic anhydride, maleic anhydride, sodium vinylsulfonate or acryloamido propane sulfonate, or combinations thereof, wherein said acid component is present from about 1% to about 3% by weight of said binder, wherein said binder having a glass transition temperature ranging from about −20° C. to 10° C. and an average particle diameter ranging from 250 nm to about 450 nm.
Dependencies are inferred from the claim text.