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    Selective Dual-Wavelength Olefin Metathesis Polymerization for Additive Manufacturing
    1.
    发明申请
    Selective Dual-Wavelength Olefin Metathesis Polymerization for Additive Manufacturing 有权

    公开(公告)号：US20230098669A1

    公开(公告)日：2023-03-30

    申请号：US17900584

    申请日：2022-08-31

    申请人： National Technology & Engineering Solutions of Sandia, LLC

    发明人： Samuel Carlos Leguizamon ,  Jeffrey Clayton Foster ,  Adam W. Cook ,  Leah Appelhans ,  Erica M. Redline ,  Brad Howard Jones

    IPC分类号： C08F136/20

    摘要： The invention is directed to the selective dual wavelength olefin metathesis polymerization for additive manufacturing. Dual-wavelength stereolithographic printing uses ring-opening metathesis polymerization of the metathesis-active polymers. As an example, a resin formulation based on dicyclopentadiene was produced using a photolatent olefin metathesis catalyst, various photosensitizers and photobase generators to achieve efficient initiation by light at one wavelength (e.g., blue) and fast catalyst decomposition and polymerization deactivation by light at a second wavelength (e.g., ultraviolet). This process enables 2-dimensional stereolithographic printing, either using photomasks or with patterned, collimated light. Importantly, the same process was readily adapted for 3-dimensional continuous additive manufacturing, with printing rates of up to 36 mm h−1 for patterned light and up to 180 mm h−1 using un-patterned, high intensity light.

    Soluble polyfunctional vinyl aromatic polymer and method of producing the same
    9.
    发明授权
    Soluble polyfunctional vinyl aromatic polymer and method of producing the same 有权
    可溶性多官能乙烯基芳族聚合物及其制备方法

    公开(公告)号：US07402645B2

    公开(公告)日：2008-07-22

    申请号：US10586969

    申请日：2005-01-26

    申请人： Masanao Kawabe

    发明人： Masanao Kawabe

    IPC分类号： C08F236/20 ,  C08F136/20 ,  C08F2/06 ,  C08F4/14

    CPC分类号： C08F212/36 ,  C08K5/19 ,  C08L25/16 ,  C08F212/12

    摘要： The present invention relates to a soluble polyfunctional vinylaromatic copolymer improved in heat resistance, resistance to thermal decomposition, solvent solubility, and processability. The soluble polyfunctional vinylaromatic polymer is obtained by cationically polymerizing, at a temperature of 20 to 120° C., one or more monomer ingredients including 20 to 100 mol % divinylaromatic compound (a) in the presence of a donor ingredient, e.g., a quaternary ammonium salt, with the aid of a Lewis acid catalyst and an initiator represented by the following general formula (1) wherein R1 represents hydrogen or a monovalent C1-6 hydrocarbon group; R2 represents an aromatic or aliphatic hydrocarbon group having a valence of p; Z represents halogen or C1-6 alkoxy or acyloxy; and p is an integer of 1 to 6; provided that when two or more R1's and Z's are present per molecule, they may be identical to different from each other.

    摘要翻译： 本发明涉及耐热性，耐热分解性，溶剂溶解性和加工性改善的可溶性多官能乙烯基芳族共聚物。 可溶性多官能乙烯基芳族聚合物通过在20至120℃的温度下，在一种或多种单体成分（包括20至100摩尔％的二乙烯基芳族化合物（a））的供体成分存在下阳离子聚合而获得，例如四 铵盐，借助于路易斯酸催化剂和由以下通式（1）表示的引发剂，其中R 1表示氢或一价C 1 -C 6烃基 组; R 2表示具有p价的芳族或脂族烃基; Z表示卤素或C 1-6烷氧基或酰氧基; p为1〜6的整数。 条件是当每个分子存在两个或更多个R 1和Z 2时，它们可以彼此不同。