US 12,138,852 B2
Additive manufacturing cartridges and processes for producing cured polymeric products by additive manufacturing
Joshua P. Abell, Franklin, TN (US); Michael R. Beaulieu, Bolton, MA (US); Douglas B. Costlow, Akron, OH (US); and Andrew V. Haidet, Tallmadge, OH (US)
Assigned to Bridgestone Americas Tire Operations, LLC, Nashville, TN (US)
Filed by Bridgestone Americas Tire Operations, LLC, Nashville, TN (US)
Filed on Aug. 23, 2021, as Appl. No. 17/409,267.
Application 17/409,267 is a division of application No. 16/062,954, granted, now 11,097,531, previously published as PCT/US2016/065360, filed on Dec. 7, 2016.
Claims priority of provisional application 62/268,660, filed on Dec. 17, 2015.
Prior Publication US 2021/0379831 A1, Dec. 9, 2021
Int. Cl. B29C 64/124 (2017.01); B29C 35/08 (2006.01); B29C 64/321 (2017.01); B29C 64/371 (2017.01); B29K 9/00 (2006.01); B32B 1/00 (2024.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); G03F 7/00 (2006.01)
CPC B29C 64/124 (2017.08) [B29C 64/321 (2017.08); B29C 64/371 (2017.08); B32B 1/00 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 70/00 (2014.12); B33Y 80/00 (2014.12); B29C 2035/0833 (2013.01); B29K 2009/00 (2013.01); G03F 7/0037 (2013.01); Y10T 428/1352 (2015.01); Y10T 428/1379 (2015.01)] 23 Claims
OG exemplary drawing
 
1. A process for producing a cured polymeric product, comprising
providing an additive manufacturing device comprising a source of actinic radiation, an exterior support structure having an atmosphere inside, an interior tank capable of containing a liquid mixture and having an atmosphere above the tank, and an interior support structure,
providing to the interior tank a liquid actinic radiation curable polymeric mixture comprising:
(i) a polyfunctionalized diene monomer-containing polymer having the formula:
[P][F]n where P represents a diene polymer chain, F represents a functional group, n is 2 to 15, and each F can be the same or different;
(ii) optionally a chain extender based upon F or reactive with F;
(iii) at least one actinic radiation sensitive photoinitiator;
(iv) optionally, a photosensitizer; and
(v) a polyfunctional crosslinker reactive with F,
repeatedly forming upon the support structure a layer having a thickness of 0.01 mm to 1 mm from the liquid mixture,
using actinic radiation to cure each layer,
thereby producing a cured polymeric product,
wherein at least one of the following has an oxygen level of less than 50 ppm: the liquid actinic radiation curable polymeric mixture within the interior tank, the atmosphere above the liquid actinic radiation curable polymeric mixture within the interior tank, the atmosphere surrounding the interior support structure, or the atmosphere inside the exterior support structure,
wherein the actinic radiation curable polymeric mixture is provided in a cartridge, and
wherein the cartridge comprises at least two separate compartments with a first compartment containing (i), and a second compartment containing (iii) and further comprising (v).