Heterogenous cosmetic ink composition for inkjet printing applications
AssigneeThe Procter & Gamble Company
InventorsJanette Villalobos Lingoes, Thomas Elliot Rabe, Jeremy Chang, Ajay Suthar
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Abstract
A cosmetic ink composition comprises a particulate material, a polymeric dispersant having a weight average molecular weight of less than about 20,000 daltons, and a polymeric rheology modifier. The particulate material can have a Particle Size Distribution D50 of about 100 nm to about 2,000 nm. The cosmetic ink composition can undergo controlled syneresis, forming a weak colloidal gel phase and a particle-lean, low viscosity phase, which can be printed without interventions such as agitation, mixing, or re-circulation to homogenize the composition.
Claims11
An ink cartridge containing a cosmetic ink composition comprising:
- a. from about 1 to about 30 active wt % titanium dioxide;
- b. a polymeric dispersant having a weight average molecular weight of less than about 20,000 daltons;
- and
- c. greater than about 0.3 active wt % of a polymeric rheology modifier selected from the group consisting of alkali swellable emulsion polymers, hydrophobically modified alkali swellable emulsion polymers, and combinations thereof;
- wherein the cosmetic ink composition has a Micro-CT Separation Value of from about 5% to about 50% after 28 days of static storage at 40° C., 1 atm, 75% relative humidity;
- and
- wherein the cosmetic ink composition has a first dynamic viscosity of from about 1,100 cP to about 10,000 cP at a shear rate of 0.1 sec−1 measured at 25° C. and a second dynamic viscosity of less than about 100 cP at a shear rate of 1,000 sec−1 measured at 25° C.;
- wherein the cosmetic ink composition has a tan(delta) of less than about 1.
Dependencies are inferred from the claim text.