US 11,834,590 B2
Adhesive compositions and their use in 3D printing
Wilhelmus Frederikus Zoetelief, Echt (NL); Patrick Gerardus Duis, Echt (NL); Adrianus Antonius Johannes Van Geel, Echt (NL); Danielle Glasbergen-Benning, Echt (NL); Rudolfus Antonius Theodorus Maria Van Benthem, Echt (NL); and Robbert Van Sluijs, Echt (NL)
Assigned to STRATASYS, INC., Eden Prairie, MN (US)
Appl. No. 16/955,104
Filed by Covestro (Netherlands) B.V., Nieuwegein (NL)
PCT Filed Dec. 21, 2018, PCT No. PCT/NL2018/050877
§ 371(c)(1), (2) Date Jun. 18, 2020,
PCT Pub. No. WO2019/125170, PCT Pub. Date Jun. 27, 2019.
Claims priority of provisional application 62/609,354, filed on Dec. 22, 2017.
Prior Publication US 2020/0377769 A1, Dec. 3, 2020
Int. Cl. C09J 133/08 (2006.01); B33Y 70/00 (2020.01); B29C 64/106 (2017.01); C09J 7/10 (2018.01); C09J 133/02 (2006.01); C09J 133/10 (2006.01); C08F 220/18 (2006.01); B33Y 10/00 (2015.01); B33Y 40/00 (2020.01)
CPC C09J 133/08 (2013.01) [B29C 64/106 (2017.08); B33Y 70/00 (2014.12); C08F 220/18 (2013.01); C08F 220/1804 (2020.02); C09J 7/10 (2018.01); C09J 133/02 (2013.01); C09J 133/10 (2013.01); B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); C08F 220/1802 (2020.02)] 20 Claims
OG exemplary drawing
 
1. An adhesive composition for additive manufacturing processes comprising an aqueous dispersion of an acrylic polymer, wherein:
the aqueous dispersion has a solids content of from about 8 wt. % to about 20 wt. %,
from about 40 wt. % to about 95 wt. % of the acrylic polymer is solubilized in a continuous aqueous phase in the aqueous dispersion, and
the un-solubilized balance of the acrylic polymer is in the form of solid particles having an average particle diameter of from about 50 nm to about 500 nm which are dispersed in the continuous aqueous phase,
wherein the acrylic polymer is an emulsion copolymer of:
(i) at least one C1-C16 alkyl methacrylate,
(ii) at least one C1-C16 alkyl acrylate, and
(iii) at least one unsaturated carboxylic acid,
wherein a C1-C16 alkyl radical of the C1-C16 alkyl methacrylate is optionally substituted with an amino moiety,
wherein the acrylic polymer has a glass transition temperature of from about 80° C. to about 130° C., and a number average molecular weight of from about 90 kilodaltons (kDa) to about 350 kDa, and
wherein the adhesive composition further comprises an alkalinizing agent such that a pH of the adhesive composition is at least about 8.0.