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US 11,884,001 B2Granted
Method for manufacturing a silicone elastomer article using a 3D printer
OwnerJean-Marc Frances, David Mariot +4inventors
InventorsJean-Marc Frances, David Mariot, Christophe Marquette, Edwin-Joffrey Courtial, Rene Fulchiron, Clement Perrinet
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Abstract
The invention relates to an additive manufacturing method for producing a three-dimensional elastomer silicone article. The elastomer silicone article is built up layer by layer by printing a silicone composition crosslinkable by addition reactions comprising at least one organopolysiloxane-polyoxyalkylene copolymer with a 3D printer selected from an extrusion 3D printer or a material jetting 3D printer.
Claims18
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.
21 more elements
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.
17 more elements
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 organopolysiloxane-polyoxyalkylene copolymer E is a branched organopolysiloxane-polyoxyalkylene copolymer comprising at least one T and/or one Q siloxy unit with Q corresponding to the siloxy unit SiO2/2 and T corresponding to the siloxy unit R1SiO3/2 where R1 is independently selected from a hydrocarbon-based group containing from 1 to 30 carbon atoms, and
- at least one crosslinking inhibitor F.
10 more elements
Dependencies are inferred from the claim text.