US 11,834,574 B2
Dual cure additive manufacturing resins for production of flame retardant objects
Ikpreet Singh Grover, Redwood City, CA (US); and Matthew S. Menyo, Belmont, CA (US)
Assigned to Carbon, Inc., Redwood City, CA (US)
Filed by Carbon, Inc., Redwood City, CA (US)
Filed on Jun. 22, 2022, as Appl. No. 17/808,209.
Application 17/808,209 is a division of application No. 17/271,360, granted, now 11,407,890, previously published as PCT/US2019/049913, filed on Sep. 6, 2019.
Claims priority of provisional application 62/729,118, filed on Sep. 10, 2018.
Prior Publication US 2022/0325093 A1, Oct. 13, 2022
Int. Cl. B29C 64/00 (2017.01); C08L 51/00 (2006.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B29C 64/124 (2017.01); B29C 64/35 (2017.01); B33Y 40/20 (2020.01); B29K 63/00 (2006.01); B29K 105/00 (2006.01)
CPC C08L 51/003 (2013.01) [B29C 64/124 (2017.08); B29C 64/35 (2017.08); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); B29K 2049/00 (2013.01); B29K 2063/00 (2013.01); B29K 2105/0002 (2013.01); B29K 2105/0026 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A dual cure resin useful for making a three-dimensional object by stereolithography, comprising:
(a) light-polymerizable monomers and/or prepolymers that can participate in forming an intermediate object by stereolithography;
(b) heat-polymerizable monomers and/or prepolymers;
(c) a hardener, or a chain extender;
(d) a flame retardant synergist, said flame retardant synergist comprising antimony pentoxide; and
(e) optionally, an organic diluent in a viscosity-reducing effective amount,
wherein one or both of said: (a) heat-polymerizable monomers and/or prepolymers, and said (c) hardener or chain extender, comprises a flame retardant group in its chemical structure, said flame retardant group comprising a halogen group.