Patent ID: 11926745
Assignee: SUN CHEMICAL CORPORATION
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. The water-based liquid black ink composition of claim 1, comprising:
(a) 30 wt % to 50 wt % mixing vehicle, based on the total weight of the water-based liquid black ink composition, wherein the mixing vehicle comprises:
i. 10 wt % to 30 wt % water, based on the total weight of the mixing vehicle;
ii. 10 wt % to 30 wt % rosin adduct, based on the total weight of the mixing vehicle;
iii. 5 wt % to 15 wt % of an L-lactic acid mixture, based on the total weight of the mixing vehicle, wherein the L-lactic acid mixture comprises 88 wt % L-lactic acid and 22 wt % water, based on the total weight of the L-lactic acid mixture;
iv. 10 wt % to 30 wt % of 14.5 Baume ammonia, based on the total weight of the mixing vehicle;
v. 1 wt % to 10 wt % wax suspension, based on the total weight of the mixing vehicle, wherein the wax suspension comprises 25 wt % wax and 75 wt % water, based on the total weight of the wax suspension;
vi. 1 wt % to 5 wt % micronized wax, based on the total of the mixing vehicle;
vii. 0.05 wt % to 1 wt % silicone compound, based on the total weight of the mixing vehicle; and
viii. 0.5 wt % to 3 wt % zinc chelating agent, based on the total weight of the mixing vehicle; and

(b) 50 wt % to 70 wt % black pigment dispersion, based on the total weight of the water-based liquid black ink composition, wherein the black pigment dispersion comprises:
i. 10 wt % to 40 wt % biochar, based on the total weight of the black pigment dispersion;
ii. 1 wt % to 5 wt % surfactant, based on the total weight of the black pigment dispersion;
iii. 5 wt % to 20 wt % of the mixing vehicle of part (a), based on the total weight of the black pigment dispersion; and
iv. 10 wt % to 50 wt % additional water, based on the total weight of the black pigment dispersion;

wherein 75% to 100% of the carbon content in the water-based liquid black ink composition is bio-renewable carbon (BRC).