US 11,884,001 B2
Method for manufacturing a silicone elastomer article using a 3D printer
Jean-Marc Frances, Meyzieu (FR); David Mariot, Lyons (FR); Christophe Marquette, Villeurbanne (FR); Edwin-Joffrey Courtial, Villeurbanne (FR); Rene Fulchiron, Saint Didier au Mont d'Or (FR); and Clement Perrinet, Villeurbanne (FR)
Appl. No. 16/611,693
Filed by Elkem Silicones France SAS, Lyons (FR); Universite Claude Bernard Lyon 1, Villeurbanne (FR); Centre National de la Recherche Scientifique (CNRS), Paris (FR); Institut National des Sciences Appliquees de Lyon, Villeurbanne (FR); and Universite Jean Monnet Saint Etienne, Saint Etienne (FR)
PCT Filed May 9, 2018, PCT No. PCT/EP2018/062088
§ 371(c)(1), (2) Date Nov. 7, 2019,
PCT Pub. No. WO2018/206689, PCT Pub. Date Nov. 15, 2018.
Prior Publication US 2020/0108548 A1, Apr. 9, 2020
Int. Cl. B29C 64/118 (2017.01); C08K 3/36 (2006.01); C08L 83/04 (2006.01); B33Y 70/10 (2020.01); B33Y 10/00 (2015.01); B29K 71/00 (2006.01); B29K 83/00 (2006.01); B29K 105/00 (2006.01); B29K 105/24 (2006.01); B29C 64/245 (2017.01); B29C 64/295 (2017.01); B29C 64/209 (2017.01); B33Y 80/00 (2015.01)
CPC B29C 64/118 (2017.08) [B29C 64/209 (2017.08); B29C 64/245 (2017.08); B29C 64/295 (2017.08); B33Y 70/10 (2020.01); C08K 3/36 (2013.01); C08L 83/04 (2013.01); B29K 2071/02 (2013.01); B29K 2083/00 (2013.01); B29K 2105/0085 (2013.01); B29K 2105/24 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12)] 18 Claims
 
1. A method for additive manufacturing a silicone elastomer article comprising:
printing a first silicone composition on a substrate with an extrusion 3D printer to form a first layer;
printing a second silicone composition on the first layer or a previous layer with the extrusion 3D printer to form a subsequent layer; and
allowing the first, previous, and subsequent layers to crosslink to obtain the silicone elastomer article,
wherein the first and second silicone compositions are crosslinkable through addition reactions,
wherein the first and second silicone compositions each have a viscosity ratio greater than 45, the viscosity ratio being a ratio of the dynamic viscosity of a silicone composition at a low shear rate of 0.5 s−1 and at a high shear rate of 25 s−1, and
wherein the first and second silicone compositions each comprise:
at least one organopolysiloxane compound A comprising, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms,
at least one organohydrogenopolysiloxane compound B comprising, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atom,
at least one catalyst C consisting of at least one metal or compound from the platinum group,
at least one reinforcing silica filler D,
at least one organopolysiloxane-polyoxyalkylene copolymer E, wherein the at least one organopolysiloxane-polyoxyalkylene copolymer E comprises (E-1):
[R1aZbSiO(4-a-b)/2]n  (E-1)
in which
each R1 is independently selected from a hydrocarbon-based group containing from 1 to 30 carbon atoms,
each Z is a group —R2—(OCpH2p)q(OCrH2r)s—OR3, wherein:
n is an integer greater than 2,
a and b are independently 0, 1, 2 or 3 and a+b=0, 1, 2, or 3,
R2 is a divalent hydrocarbon group having from 2 to 20 carbon atoms or a direct bond,
R3 is a hydrogen atom or a group as defined for R1,
p and r are independently an integer from 1 to 6,
q and s are independently 0 or an integer such that 1<q+s<400, and
each molecule of the organopolysiloxane-polyoxyalkylene copolymer E contains at least one group Z, and
at least one crosslinking inhibitor F.