US 12,168,713 B2
Materials for photoinitiated cationic ring-opening polymerization and uses thereof
Gregory Ellson, Cambridge, MA (US); and Scott Twiddy, Somerville, MA (US)
Assigned to Inkbit, LLC, Medford, MA (US)
Filed by Inkbit, LLC, Medford, MA (US)
Filed on Dec. 28, 2021, as Appl. No. 17/563,196.
Application 17/563,196 is a continuation of application No. PCT/US2021/036777, filed on Jun. 10, 2021.
Claims priority of provisional application 63/037,226, filed on Jun. 10, 2020.
Prior Publication US 2022/0119587 A1, Apr. 21, 2022
Int. Cl. C08G 59/68 (2006.01); B29C 64/112 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C08G 59/02 (2006.01); C08G 59/22 (2006.01); C08G 59/24 (2006.01); C08G 59/62 (2006.01); C08G 63/06 (2006.01); C08K 5/06 (2006.01); C08L 63/00 (2006.01); B29K 63/00 (2006.01)
CPC C08G 59/022 (2013.01) [B29C 64/112 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C08G 59/223 (2013.01); C08G 59/24 (2013.01); C08G 59/68 (2013.01); C08G 63/06 (2013.01); C08K 5/06 (2013.01); B29K 2063/00 (2013.01)] 31 Claims
 
24. A combination comprising:
a ring-containing agent comprising:
(3-4-epoxycyclohexane)methyl 3′-4′-epoxycyclohexyl-carboxylate present at a concentration of 45±15% w/w;
3-ethyloxetane-3-methanol present at a concentration of 15±5% w/w; and
an oxirane agent comprising a bisphenol moiety or an oxetane agent comprising a bisphenol moiety;
a dialkyl sulfide present at a concentration of about 0.2% w/w;
a polytetrahydrofuran diol present at a concentration of about 20±10% w/w;
9,10-diethoxyanthracene present at a concentration of up to about 0.2% w/w; and
(sulfanediyldibenzene-4,1-diyl)bis(diphenylsulfonium) bis(hexafluoroantimonate) present at a concentration of 2±0.2% w/w;
wherein the combination is configured to be suitable for inkjet 3D printing with a viscosity of about 100 cp or less as measured at a temperature of about 70° C.
 
29. A method of preparing a cured material, comprising a step of subjecting the combination of claim 24 to a curing condition.
 
30. A cured material being prepared by the method of claim 29.