3D PRINTED COMPOSITES FROM PHASE SEPARATED MATERIALS

    公开(公告)号:WO2022047394A1

    公开(公告)日:2022-03-03

    申请号:PCT/US2021/048476

    申请日:2021-08-31

    Abstract: The present disclosure provides methods, systems, devices, and kits for creating composite materials from a single resin, the composite materials having multiple continuous phases. The disclosure includes a process to three-dimensionally print objects (e.g., orthodontic appliances) with composite properties. In some aspects, the composite properties are formed from a single formulation with components that, when processed, have hard and soft continuous phases. In some aspects, the composite properties are formed by separately processing the hard phase components and the soft phase components. In some aspects, the composite materials and devices are three-dimensionally printed using the processed material.

    WEAK COVALENT CROSSLINKS IN THERMOSET MATERIALS FOR INCREASED TOUGHNESS

    公开(公告)号:WO2021183925A1

    公开(公告)日:2021-09-16

    申请号:PCT/US2021/022165

    申请日:2021-03-12

    Abstract: This disclosure provides polymeric materials comprising weak crosslinking covalent bonds and/or weak crosslinking units comprising a weak covalent bond. Weak covalent bonds can be used in place of hydrogen bonds present in traditional polymeric materials (e.g., polyurethanes). Advantageously, the toughness can be controlled by varying the strength of weak covalent bonds and/or by varying the number of weak covalent crosslinks. Crosslinked materials applying the weak covalent crosslinking bonds can be used to create tough materials able to resist stress relaxation. Further, the present disclosure provides polymer chains and polymeric materials comprising inchain loops (also referred to herein as rings). The inchain loops comprise weak bonds and/or weak bridges comprising at least one weak bond. This disclosure also provides compositions comprising the polymer chains, materials comprising the polymer chains, monomer units that can react to form inchain loop-comprising polymer chains, resins comprising the monomer units, and related materials, appliances, and uses.

    3D PRINTED COMPOSITES FROM A SINGLE RESIN BY PATTERNED LIGHT EXPOSURES

    公开(公告)号:WO2019006409A1

    公开(公告)日:2019-01-03

    申请号:PCT/US2018/040467

    申请日:2018-06-29

    Abstract: Provided herein are processes for the generation of composite polymer materials utilizing a single resin. The processes utilize diffusion between a region undergoing a polymerization reaction preferentially polymerizing one monomer component and an unreactive region. Diffusion and subsequent/concurrent polymerization results in a higher concentration of the more reactive monomer component in the reacting region and a higher concentration of the less reactive monomer components in the unreactive region. The unreactive region may be later polymerized. In embodiments, photopolymerization is used and the regions are generated by a mask or other mechanism to pattern the light.

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