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US 12,692,409 B2Granted
Writing gel ink
AssigneeSociete BIC
InventorsGuillaume Caffier, Wing Yam Liu
Life of this patent
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Abstract
The present disclosure relates to pens comprising a non-aqueous writing ink comprising a solvent, a coloring agent, a resin, a gelling agent, and a homo or copolymer of vinylpyrrolidone, wherein the gelling agent is a mixture of silica particles and of a fatty acid amide wax, and wherein the homo or copolymer of vinylpyrrolidone is present in amounts of between about 0.05 and about 0.6 wt.-%, relative to the total weight of the ink.
Claims20
A writing instrument, comprising:
- a non-aqueous writing ink, comprising:
- a solvent;
- a gelling agent;
- a coloring agent;
- and
- a polymeric rheology agent comprising a homopolymer of vinylpyrrolidone, a copolymer of vinylpyrrolidone, or a mixture thereof, wherein the polymeric rheology agent is present in amounts of between 0.05 wt.-% and 0.3 wt.-%, relative to a total weight of the ink;
- wherein the gelling agent comprises water-insoluble cellulose nanofibers.
4 more elements
A non-aqueous writing ink, comprising:
- a solvent;
- a gelling agent;
- a coloring agent;
- and
- a polymeric rheology agent comprising a homopolymer of vinylpyrrolidone, a copolymer of vinylpyrrolidone, or a mixture thereof, wherein the polymeric rheology agent is present in amounts of between 0.05 wt.-% and 0.3 wt.-% relative to a total weight of the ink;
- wherein the gelling agent comprises water-insoluble non-oxidized cellulose nanofibers.
3 more elements
Dependencies are inferred from the claim text.