	US 12,252,572 B2
	Method for improving adhesion in and between layers of additive manufactured articles
Thomas Fry, Victoria, MN (US); Luke Rodgers, St. Petersburg, FL (US); Zachary Peterson, New Hope, MN (US); and Levi Loesch, Minneapolis, MN (US)
Assigned to LUMAS Polymers LLC, Chaska, MN (US)
Appl. No. 17/801,344
Filed by LUMAS Polymers LLC, Chaska, MN (US)
PCT Filed Feb. 24, 2021, PCT No. PCT/US2021/019393 § 371(c)(1), (2) Date Aug. 22, 2022, PCT Pub. No. WO2021/173652, PCT Pub. Date Sep. 2, 2021.
Claims priority of provisional application 62/985,007, filed on Mar. 4, 2020.
Claims priority of provisional application 62/981,854, filed on Feb. 26, 2020.
Claims priority of provisional application 62/981,937, filed on Feb. 26, 2020.
Prior Publication US 2023/0097954 A1, Mar. 30, 2023
Int. Cl. C08F 293/00 (2006.01); B29C 64/118 (2017.01); B29C 64/141 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C08G 69/48 (2006.01); C08K 3/013 (2018.01); C08L 77/02 (2006.01); B29K 67/00 (2006.01); B29K 77/00 (2006.01)

CPC C08F 293/00 (2013.01) [B29C 64/118 (2017.08); B29C 64/141 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C08G 69/48 (2013.01); C08K 3/013 (2018.01); C08L 77/02 (2013.01); B29K 2067/00 (2013.01); B29K 2077/00 (2013.01)]

10 Claims

1. A method of additive manufacturing comprising:

(i) heating a condensation polymer to form a first layer that is fused by directed application of heating thereby fusing said condensation polymer within said first layer, and

(ii) sequentially depositing and heating subsequent layers of the condensation polymer to fuse such subsequent layers within and between the layers, wherein at least a portion of the condensation polymer has a chain extender deposited thereon the condensation polymer of the subsequent layers before depositing each of the subsequent layers and before heating the chain extender, and wherein the condensation polymer comprises a first condensation polymer that has been previously subjected to heat whereby the condensation polymer was cleaved and end capped with the chain extender having a functionality of 1 with the first condensation polymer and a second condensation polymer that is react-able with the chain extender that has end capped the first condensation polymer.