Use of latent metathesis polymerization systems for additive manufacturing

DWPI Title: Resin used for additive manufacturing of direct-ink write additive, stereolithographic additive, and dual-cure thermoset resin, comprises metathesis-active monomer, and latent metathesis catalyst that can be activated by external stimulus to initiate ring-opening metathesis polymerization
Abstract: The invention is directed to latent metathesis-active resin compositions and additive manufacturing approaches. The latent metathesis-active compositions comprise at least one latent metathesis catalyst, at least one curable metathesis-active monomer, and optional fillers, photosensitizers, and/or a secondary monomer resin system for dual-cure. A method comprises extruding a latent metathesis-active resin from a dispensing apparatus and spatially triggering a ring-opening metathesis polymerization by directed irradiation with light or directed application of a thermal stimuli for direct-ink write printing of objects. Another method uses a latent metathesis-active resin for vat photopolymerization and stereolithographic printing of objects.
Use: Resin used for additive manufacturing of direct-ink write additive, stereolithographic additive, and dual-cure thermoset resin (all claimed).
Advantage: The resin has increased rate of initiation and enabled rapid printing of structurally stable object by using photosensitizer or photosensitizer, and can greatly expand the material selection and performance property achievable with additively manufactured thermoset resin.
Novelty: Resin comprises a metathesis-active monomer, and a latent metathesis catalyst that can be activated by an external stimulus to initiate a ring-opening metathesis polymerization (ROMP) of the metathesis-active monomer.
Filed: 2/22/2022
Application Number: US17677558A
Tech ID: SD 15536.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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