	US 12,186,981 B2
	Methods and compositions for forming three-dimensional objects by additive fabrication
Johan Franz Gradus Antonius Jansen, Echt (NL); Rudolfus Antonius Theodorus Maria Van Benthem, Echt (NL); Paulus Franciscus Anna Buijsen, Echt (NL); Franciscus Johannes Marie Derks, Echt (NL); Mark Petrus Franciscus Pepels, Echt (NL); and Alfred Jean Paul Buckmann, Echt (NL)
Assigned to Stratasys, Inc., Eden Prairie, MN (US)
Filed by Stratasys, Inc., Eden Prairie, MN (US)
Filed on Jul. 26, 2023, as Appl. No. 18/359,767.
Application 18/359,767 is a division of application No. 16/318,763, granted, now 11,724,447, previously published as PCT/EP2017/068524, filed on Jul. 21, 2017.
Claims priority of application No. 16180915 (EP), filed on Jul. 22, 2016; application No. 16196328 (EP), filed on Oct. 28, 2016; and application No. 17167544 (EP), filed on Apr. 21, 2017.
Prior Publication US 2023/0373159 A1, Nov. 23, 2023
Int. Cl. B29C 64/165 (2017.01); B29C 64/291 (2017.01); B29C 64/393 (2017.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C08F 2/48 (2006.01); C08F 216/12 (2006.01); C08F 220/18 (2006.01); C08F 290/06 (2006.01); C08G 18/22 (2006.01); C08G 18/32 (2006.01); C08G 18/42 (2006.01); C08G 18/67 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C08G 18/80 (2006.01); C08K 3/013 (2018.01); C08K 5/14 (2006.01); C08K 5/17 (2006.01); C08L 67/06 (2006.01); C08L 75/02 (2006.01); C08L 75/14 (2006.01); B33Y 50/02 (2015.01)

CPC B29C 64/165 (2017.08) [B29C 64/291 (2017.08); B29C 64/393 (2017.08); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C08F 2/48 (2013.01); C08F 216/125 (2013.01); C08F 220/1811 (2020.02); C08F 290/06 (2013.01); C08F 290/061 (2013.01); C08G 18/227 (2013.01); C08G 18/3206 (2013.01); C08G 18/4211 (2013.01); C08G 18/672 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C08G 18/8016 (2013.01); C08K 3/013 (2018.01); C08K 5/14 (2013.01); C08K 5/17 (2013.01); C08L 67/06 (2013.01); C08L 75/02 (2013.01); C08L 75/14 (2013.01); B33Y 50/02 (2014.12)]

20 Claims

1. A kit of materials for forming an object by an additive fabrication process comprising:

a. a particulate composition comprising a plurality of first particles that comprise a resin component, the resin component comprising a first resin that is crystalline or semi-crystalline, the first resin comprising a first resin polymerizable group; and

b. a liquid composition;

wherein for at least one temperature, the first resin does not undergo melting in absence of the liquid composition, but does undergo melting when the particulate composition is in contact with the liquid composition, and

wherein at least one of the particulate composition or the liquid composition comprises an initiator capable of initiating polymerization of at least the first resin when the liquid composition is in contact with the first resin; and

wherein each resin in the particulate composition has a Mn divided by the average number of polymerizable groups per resin molecule of less than 3000 g/mol.