US 12,233,606 B2
Support material formulation and additive manufacturing processes employing same
Yuval Vidavsky, Moshav Sitriya (IL); Dani Peri, Rehovot (IL); Mariana Pokrass, Rehovot (IL); Avraham Levy, Petach-Tikva (IL); and Eynat Matzner, Adi (IL)
Assigned to Stratasys Ltd., Rehovot (IL)
Filed by Stratasys Ltd., Rehovot (IL)
Filed on Nov. 28, 2023, as Appl. No. 18/520,708.
Application 18/520,708 is a continuation of application No. 17/542,549, filed on Dec. 6, 2021, granted, now 11,850,802.
Application 17/542,549 is a continuation of application No. 15/752,621, granted, now 11,207,839, issued on Dec. 28, 2021, previously published as PCT/IL2016/050886, filed on Aug. 14, 2016.
Claims priority of provisional application 62/205,009, filed on Aug. 14, 2015.
Claims priority of provisional application 62/205,010, filed on Aug. 14, 2015.
Prior Publication US 2024/0092033 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 64/40 (2017.01); B29C 35/08 (2006.01); B29C 64/112 (2017.01); B29C 64/35 (2017.01); B29K 33/04 (2006.01); B33Y 10/00 (2015.01); B33Y 40/20 (2020.01); B33Y 70/00 (2020.01); B33Y 80/00 (2015.01); C08F 2/48 (2006.01); C08F 220/28 (2006.01); C08F 283/06 (2006.01); C11D 3/04 (2006.01); C11D 3/08 (2006.01); C11D 7/06 (2006.01); C11D 7/14 (2006.01); G03F 7/00 (2006.01); G03F 7/027 (2006.01); G03G 9/087 (2006.01)
CPC B29C 64/40 (2017.08) [B29C 64/112 (2017.08); B29C 64/35 (2017.08); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); C08F 2/48 (2013.01); C08F 220/28 (2013.01); C08F 220/286 (2020.02); C08F 283/06 (2013.01); C11D 3/044 (2013.01); C11D 3/08 (2013.01); C11D 7/06 (2013.01); C11D 7/14 (2013.01); G03G 9/08722 (2013.01); G03G 9/08728 (2013.01); G03G 9/08793 (2013.01); G03G 9/08795 (2013.01); B29C 35/08 (2013.01); B29K 2033/04 (2013.01); B33Y 80/00 (2014.12); G03F 7/0037 (2013.01); G03F 7/027 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of fabricating a three-dimensional model object, the method comprising dispensing a building material so as to sequentially form a plurality of layers in a configured pattern corresponding to the shape of the object, wherein said building material comprises a modeling material formulation and a support material formulation, and wherein said support material formulation comprises:
a non-curable water-miscible polymer, in an amount that ranges from 30 to 80 weight percent of the total weight of the formulation, said non-curable water-miscible polymer comprising an alkoxylated polyol;
a non-curable water-miscible non-polymeric material which comprises 1,2-propanediol;
a first water-miscible, curable material in an amount that ranges from 10 to 20 weight percent of the total weight of the formulation; and
at least one second water-miscible curable material in an amount that ranges from 5 to 15 weight percent of the total weight of the formulation,
wherein said first water-miscible curable material comprises a mono-functional poly(alkylene glycol) acrylate; and
wherein said second water-miscible curable material is represented by Formula I:

OG Complex Work Unit Chemistry
wherein:
Ra is selected from H, C(1-4) alkyl and a hydrophilic group;
k is an integer ranging from 2 to 10;
X is -NRc-, wherein Rc is hydrogen, alkyl, cycloalkyl or aryl; and
Y is a hydrogen bond-forming moiety that comprises at least one nitrogen and/or oxygen atom,
the support material formulation being devoid of a multi-functional curable material.