US 12,420,472 B2
Additive manufacture of hierarchically porous materials with high resolution
Siwei Liang, Dublin, CA (US); Theodore F. Baumann, Discovery Bay, CA (US); Eric B. Duoss, Dublin, CA (US); Christopher M. Spadaccini, Oakland, CA (US); Marcus A. Worsley, Hayward, CA (US); and Cheng Zhu, Livermore, CA (US)
Assigned to Lawrence Livermore National Security, LLC, Livermore, CA (US)
Filed by Lawrence Livermore National Security, LLC, Livermore, CA (US)
Filed on Mar. 22, 2019, as Appl. No. 16/362,450.
Prior Publication US 2020/0298466 A1, Sep. 24, 2020
Int. Cl. B29C 64/106 (2017.01); B29C 64/209 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B33Y 70/10 (2020.01); B33Y 80/00 (2015.01); C08K 3/22 (2006.01); C08L 53/00 (2006.01); C08L 61/02 (2006.01)
CPC B29C 64/106 (2017.08) [B29C 64/209 (2017.08); B33Y 70/00 (2014.12); B33Y 70/10 (2020.01); C08K 3/22 (2013.01); C08L 53/00 (2013.01); C08L 61/02 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12)] 18 Claims
 
1. An ink, comprising:
a polymer precursor, wherein the polymer precursor is a formaldehyde resin;
a copolymer, wherein a ratio by weight of the polymer precursor to the copolymer is in a range from about 1:1 to about 1:11;
a catalyst; and
a solvent,
wherein the ink is physically characterized as being extrudable into self-supporting ligaments.