Patent ID: 11884001
Assignee: nan
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 12:
13. 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 comprising (E-2):

Ra3SiO[Ra2SiO]t[RaSi(Rb—(OCH2CH2)x(OCH2(CH3)CH)y—OH)O]rSiRa3  (E-2)

in which
each Ra is independently selected from alkyl groups containing from 1 to 8 carbon atoms,
each Rb is a divalent hydrocarbon group having from 2 to 6 carbon atoms or a direct bond,
x and y are independently integers comprised from 1 to 40,
t is from 1 to 200, and
r is from 2 to 25, and

at least one crosslinking inhibitor F.