US 12,441,889 B2
Hydrogel three-dimensional printing with self-crosslinking particulate build material
Emre Hiro Discekici, San Diego, CA (US); Shannon Reuben Woodruff, San Diego, CA (US); Jacob Wright, San Diego, CA (US); Carolin Fleischmann, San Diego, CA (US); and Graciela Emma Negri Jimenez, San Diego, CA (US)
Assigned to Peridot Print LLC, Palo Alto, CA (US)
Appl. No. 17/912,617
Filed by PERIDOT PRINT LLC, Palo Alto, CA (US)
PCT Filed Apr. 10, 2020, PCT No. PCT/US2020/027603
§ 371(c)(1), (2) Date Sep. 19, 2022,
PCT Pub. No. WO2021/206726, PCT Pub. Date Oct. 14, 2021.
Prior Publication US 2023/0144669 A1, May 11, 2023
Int. Cl. C08L 101/14 (2006.01); B29C 64/165 (2017.01); B29K 29/00 (2006.01); B29K 105/00 (2006.01); B29K 105/24 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 70/00 (2020.01)
CPC C08L 101/14 (2013.01) [B29C 64/165 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 70/00 (2014.12); B29K 2029/04 (2013.01); B29K 2105/0061 (2013.01); B29K 2105/24 (2013.01); B29K 2995/0088 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A three-dimensional printing kit, comprising:
particulate build material comprising from about 90 wt % to 100 wt % of a mixture of a powdered polyhydroxylated swellable polymer dry blended with a powdered water-soluble crosslinker that is reactive with hydroxyl groups of the polyhydroxylated swellable polymer to crosslink the polyhydroxylated swellable polymer, wherein;
the polyhydroxylated swellable polymer is selected from the group consisting of polyvinyl alcohol, gelatin, chitosan, hyaluronic acid, poly(2-hydroxyethyl acrylate), poly(2-hydroxyethyl methacrylate), poly(methacrylic acid), poly(N,N-dimethylacrylamide), poly(N,N-diethylacrylamide), poly(N-isopropylacrylamide), and a combination thereof;
the water-soluble crosslinker is selected from the group consisting of sodium tetraborate, boric acid, cationic barium, and a combination thereof; and
the water-soluble crosslinker is present in the particulate build material in an amount ranging from about 1 wt % to about 50 wt %; and
an aqueous agent comprising water and an organic co-solvent, wherein the aqueous agent does not include the water-soluble crosslinker.