# US 11,440,241 B2 · Additive manufacturing of a free form object made of multicomponent materials > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,241 B2 - Document ID: US11440241B2 - Status: Granted - Kind: B2 - Application number: 15/929,706 - Filed: 2020-05-18 - Published: 2020-12-17 - Granted: 2022-09-13 - Earliest claimed: 2019-06-14 - Assignees: IO Tech Group Ltd. - Applicants: IO Tech Group Ltd. - Inventors: Michael Zenou; Guy Nesher - Web page: https://patentgrep.com/patent/US11440241B2 ## CPC - B29C 64/112: using individual droplets, e.g. from jetting heads - B29C 64/393: for controlling or regulating additive manufacturing processes - B29C 64/40: Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof - B33Y 10/00: Processes of additive manufacturing - B33Y 50/00: Data acquisition or data processing for additive manufacturing - B33Y 70/00: Materials specially adapted for additive manufacturing - B33Y 80/00: Products made by additive manufacturing - C08L 63/00: Compositions of epoxy resins; Compositions of derivatives of epoxy resins - C08L 75/04: Polyurethanes - C08L 83/04: Polysiloxanes - B29K 2063/00: Use of {EP, i.e.} epoxy resins {or derivatives thereof}, as moulding material - B29K 2075/00: Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material - B29K 2083/00: Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material - B29K 2105/0014: {Catalysts} - B29K 2105/16: Fillers - B29K 2863/00: Use of EP, i.e. epoxy resins or derivatives thereof as mould material - B29K 2875/00: Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as mould material - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS ## Abstract Manufacture of a 3D object by a printing method that enables the use of several reactive materials sequentially. A laser-enhanced jetting-based 3D printer forms successive layers of reactive compositions on one another and the first and subsequent layers are allowed to crosslink between the printings to ultimately form the 3D object. Additional reactive compositions may be printed prior to the crosslinking. The crosslinking may be effected by heating, with or without a catalyst, and post printing curing may be employed after the 3D object is formed. ## Claims ### Claim 1 A method for fabricating a three-dimensional (3D) object, comprising: (a) printing a first reactive composition on a substrate with a laser-enhanced jetting-based 3D printer to form a first layer of the 3D object; (b) after formation of the first layer of the 3D object, jetting a second reactive composition towards the first reactive composition contained within the first layer with said laser-enhanced jetting-based 3D printer to form a mixture of the first reactive composition and the second reactive composition; (c) allowing the mixture of the first reactive composition and the second reactive composition to chemically react to form a compound; and (d) repeating steps (a) — (c) until the 3D object is formed. ### Claim 2 (depends on 1) The method of claim 1, further comprising repeating step (b) with fan additional reactive composition prior to allowing the first reactive composition and the second reactive composition to chemically react. ### Claim 3 (depends on 2) The method of claim 2, wherein the first reactive composition and the second reactive composition are crosslinked by heating. ### Claim 4 (depends on 1) The method of claim 1, wherein the first reactive composition and the second reactive composition are crosslinked by heating. ### Claim 5 (depends on 1) The method of claim 1, wherein some or all of the first reactive composition and the second reactive composition are printed using a support material as a mold. ### Claim 6 (depends on 5) The method of claim 5, wherein the support material is a UV-curable material. ### Claim 7 (depends on 5) The method of claim 5, wherein the support material is an epoxy acrylate. ### Claim 8 (depends on 7) The method of claim 7, wherein the support material includes a photoinitiator in an amount of 0.1 to 10% by weight. ### Claim 9 (depends on 5) The method of claim 5, wherein the support material includes a photoinitiator for cationic polymerization in an amount of 0.05 to 3% by weight. ### Claim 10 (depends on 5) The method of claim 5, wherein the support material is a urethane acrylate or other acrylated monomer. ### Claim 11 (depends on 1) The method of claim 1, further comprising employing post printing curing after the 3D object is formed. ### Claim 12 (depends on 1) The method of claim 1, wherein the first reactive composition and the second reactive composition are silicone elastomers. ### Claim 13 (depends on 12) The method of claim 12, wherein the first reactive composition comprises an organopolysiloxane compound having, per molecule, at least two C2-C6 alkenyl radicals bonded to silicon atoms and the second reactive composition comprises an organohydrogenopolysiloxane compound having, per molecule, at least two hydrogen atoms bonded to an identical or different silicon atoms. ### Claim 14 (depends on 13) The method of claim 13, wherein the chemical reaction is effected by heating with a catalyst including at least one platinum group metal or compound to create a semi-crosslinked object. ### Claim 15 (depends on 1) The method of claim 1, wherein the first reactive composition and the second reactive composition are epoxy resins. ### Claim 16 (depends on 1) The method of claim 1, wherein the first reactive composition and the second reactive composition are polyurethanes. ### Claim 17 (depends on 1) The method of claim 1, wherein either or both of the first reactive composition and the second reactive composition include a catalyst compound. ### Claim 18 (depends on 1) The method of claim 1, wherein either or both of the first reactive composition and the second reactive composition include a filler compound.