US 11,939,468 B2
Formulations usable in additive manufacturing of a three-dimensional object made of a soft material
Mazi Amiel-Levy, Petach-Tikva (IL); Shiran Lupo, Yokneam Ilit (IL); Tal Ely, Rehovot (IL); and Daniel Dikovsky, Ariel (IL)
Assigned to Stratasys Ltd., Rehovot (IL)
Filed by Stratasys Ltd., Rehovot (IL)
Filed on Dec. 7, 2022, as Appl. No. 18/076,478.
Application 18/076,478 is a division of application No. 16/634,173, granted, now 11,549,012, previously published as PCT/IL2018/050841, filed on Jul. 27, 2018.
Claims priority of provisional application 62/538,006, filed on Jul. 28, 2017.
Prior Publication US 2023/0103463 A1, Apr. 6, 2023
Int. Cl. B33Y 70/00 (2020.01); B29C 64/106 (2017.01); B29C 64/393 (2017.01); B33Y 40/00 (2020.01); B33Y 40/10 (2020.01); C08K 3/36 (2006.01); C08L 71/02 (2006.01); B29K 71/00 (2006.01); B29K 105/00 (2006.01); B33Y 50/02 (2015.01); B33Y 80/00 (2015.01)
CPC C08L 71/02 (2013.01) [B29C 64/106 (2017.08); B29C 64/393 (2017.08); B33Y 40/00 (2014.12); B33Y 40/10 (2020.01); B33Y 70/00 (2014.12); C08K 3/36 (2013.01); B29K 2071/02 (2013.01); B29K 2105/0085 (2013.01); B33Y 50/02 (2014.12); B33Y 80/00 (2014.12)] 25 Claims
OG exemplary drawing
 
1. A method of additive manufacturing of a three-dimensional object featuring, in at least a portion thereof, a Shore A hardness lower than 10 or a Shore 00 hardness lower than 40, the method comprising sequentially forming a plurality of layers in a configured pattern corresponding to the shape of the object, thereby forming the object,
wherein the formation of each of at least a few of said layers comprises dispensing at least one modeling material formulation, and exposing the dispensed modeling material to curing energy to thereby form a cured modeling material,
said at least one modeling material formulation comprising:
a mono-functional curable material, in an amount of from 50 to 89 weight percent, the mono-functional curable material selected from the group consisting of ethoxylated nonylphenyl acrylate, isodecyl acrylate, lauryl acrylate and ethoxylated lauryl acrylate;
a non-curable polymeric material, in an amount ranging from 10 to 49 weight percent, the non-curable polymeric material selected from the group consisting of polypropylene glycol and block copolymers of polyethylene glycol and polypropylene glycol;
a multi-functional curable material, in an amount ranging from 1 to 10 weight percent, the multi-functional curable material selected from the group consisting of urethane diacrylate, aliphatic triacrylate and epoxy diacrylate,
wherein:
(i) said non-curable polymeric material features a molecular weight of at least 1000 Daltons; and/or
(ii) said non-curable polymeric material features a Tg lower than 0° C.; and/or
(iii) at least 80 weight percents of the total amount of said mono-functional and said multi-functional curable materials include curable materials having, when hardened, a Tg lower than 0° C.,
the curable formulation featuring, when hardened, a Shore A hardness lower than 10 or a Shore 00 hardness lower than 40.