US 11,981,095 B2
Method for producing an at least partially coated object
Dirk Achten, Leverkusen (DE); Thomas Büsgen, Leverkusen (DE); Thomas Michaelis, Leverkusen (DE); Roland Wagner, Leverkusen (DE); Bettina Mettmann, Dormagen (DE); Levent Akbas, Witten (DE); Jürgen Hättig, Odenthal (DE); and Arnaud Guedou, Bailly Romainvilliers (FR)
Assigned to Stratasys, Inc., Eden Prairie, MN (US)
Appl. No. 16/463,510
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed Nov. 22, 2017, PCT No. PCT/EP2017/080037
§ 371(c)(1), (2) Date May 23, 2019,
PCT Pub. No. WO2018/095967, PCT Pub. Date May 31, 2018.
Claims priority of application No. 16200725 (EP), filed on Nov. 25, 2016.
Prior Publication US 2019/0375153 A1, Dec. 12, 2019
Int. Cl. B29C 71/00 (2006.01); B29C 64/153 (2017.01); B33Y 40/20 (2020.01); B33Y 80/00 (2015.01); C08G 18/32 (2006.01); C08G 18/38 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C08G 18/76 (2006.01); C08J 7/043 (2020.01); C08J 7/046 (2020.01); C08J 7/056 (2020.01); B29K 75/00 (2006.01)
CPC B29C 71/0009 (2013.01) [B29C 64/153 (2017.08); B33Y 40/20 (2020.01); C08G 18/3228 (2013.01); C08G 18/3234 (2013.01); C08G 18/3857 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C08G 18/7671 (2013.01); C08J 7/043 (2020.01); C08J 7/046 (2020.01); C08J 7/056 (2020.01); B29K 2075/00 (2013.01); B33Y 80/00 (2014.12); C08J 2375/04 (2013.01); C08J 2433/10 (2013.01)] 15 Claims
 
1. A process for producing an at least partially coated article comprising:
producing the article using an additive manufacturing process from a construction material comprising a thermoplastic polyurethane material; and
at least partially contacting the article with a preparation selected from:
aqueous polyurethane dispersion,
aqueous dispersion of an OH-containing polymer, wherein this dispersion further contains an NCO-containing compound,
aqueous preparation of an NCO-containing compound, wherein this preparation contains no OH-containing polymers, or
a combination of at least two of these,
wherein the residual content of organic solvents in the preparation is less than 2% by weight relative to the total preparation; and
wherein regions of the article contacted by the preparation have an elastic modulus at 50% elongation determined according to DIN 53504 that is 5% greater than an elastic modulus at 50% elongation of regions of the article not contacted by the preparation.