US 12,251,875 B2
Three-dimensional printing with tinted anti-coalescing agents
Emre Hiro Discekici, San Diego, CA (US); Shannon Reuben Woodruff, San Diego, CA (US); Graciela Emma Negri Jimenez, San Diego, CA (US); and Jacob Wright, San Diego, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/637,473
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Oct. 22, 2019, PCT No. PCT/US2019/057325
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/080565, PCT Pub. Date Apr. 29, 2021.
Prior Publication US 2022/0274327 A1, Sep. 1, 2022
Int. Cl. B29C 64/165 (2017.01); B29C 64/295 (2017.01); B29K 77/00 (2006.01); B29K 101/12 (2006.01); B29K 105/00 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 70/10 (2020.01)
CPC B29C 64/165 (2017.08) [B29C 64/295 (2017.08); B29K 2077/00 (2013.01); B29K 2101/12 (2013.01); B29K 2105/0032 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 70/10 (2020.01)] 16 Claims
OG exemplary drawing
 
1. A multi-fluid kit for three-dimensional printing, the multi-fluid kit comprising:
a fusing agent comprising water and an electromagnetic radiation absorber, wherein the electromagnetic radiation absorber absorbs radiation energy and converts the radiation energy to heat; and
a tinted anti-coalescing agent contained separately from the fusing agent, the tinted anti-coalescing agent comprising:
an aqueous liquid vehicle;
a colored dye dissolved in the aqueous liquid vehicle; and
a polyelectrolyte having a weight average molecular weight from about 1,000 Mw to about 8,000 Mw, wherein the polyelectrolyte is water-absorbent at a water to polyelectrolyte weight ratio from about 2:1 to about 1,000:1, and wherein about 90 wt % to 100 wt % of the polyelectrolyte is dissolved in the aqueous liquid vehicle.