US 11,891,485 B2
Silicone dual cure resins for additive manufacturing
Jessica D. Drazba, Redwood City, CA (US); and Jason P. Rolland, San Carlos, CA (US)
Assigned to Carbon, Inc., Redwood City, CA (US)
Appl. No. 15/754,135
Filed by Carbon, Inc., Redwood City, CA (US)
PCT Filed Nov. 4, 2016, PCT No. PCT/US2016/060440
§ 371(c)(1), (2) Date Feb. 21, 2018,
PCT Pub. No. WO2017/079502, PCT Pub. Date May 11, 2017.
Claims priority of provisional application 62/270,642, filed on Dec. 22, 2015.
Claims priority of provisional application 62/251,323, filed on Nov. 5, 2015.
Prior Publication US 2018/0244854 A1, Aug. 30, 2018
Int. Cl. C08G 77/442 (2006.01); C08G 77/12 (2006.01); C08G 77/20 (2006.01); B33Y 70/00 (2020.01); B33Y 10/00 (2015.01); C08L 83/10 (2006.01); B33Y 80/00 (2015.01); C08L 83/06 (2006.01); C08K 5/56 (2006.01); C08L 83/00 (2006.01); B29C 64/129 (2017.01); B29K 83/00 (2006.01); B29K 105/00 (2006.01)
CPC C08G 77/442 (2013.01) [B29C 64/129 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); C08G 77/12 (2013.01); C08G 77/20 (2013.01); C08K 5/56 (2013.01); C08L 83/00 (2013.01); C08L 83/06 (2013.01); C08L 83/10 (2013.01); B29K 2083/00 (2013.01); B29K 2105/0014 (2013.01)] 14 Claims
 
1. A method of forming a three-dimensional object comprised of a silicone polymer, said method comprising:
(a) providing a silicone dual cure resin; wherein said silicone dual cure resin comprises:
(i) a light polymerizable first reactant;
(ii) a photoinitiator;
(iii) a second reactant comprising at least one siloxane linkage, and
(iv) optionally a catalyst;
wherein said light polymerizable first reactant optionally contains at least one siloxane linkage;
(b) forming a solid polymer scaffold by irradiating said light polymerizable first reactant with patterned actinic radiation or light to form a three-dimensional intermediate from said resin, where said intermediate has the shape of, or a shape to be imparted to, said three-dimensional object, and wherein said second reactant is carried within the polymer scaffold in unsoldified form, whereby said three-dimensional intermediate is fabricated in a layer-by-layer or layerless manner through multiple exposures of the patterned actinic radiation or light; then
(c) further reacting said three-dimensional intermediate, said further reacting sufficient to form said three-dimensional object comprised of a silicone polymer from said three-dimensional intermediate,
wherein said further reacting in step (c) is carried out by a method comprising contacting said intermediate to moisture.