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    NOVEL URETHANE ACRYLATE COMPOSITION
    2.
    发明申请
    NOVEL URETHANE ACRYLATE COMPOSITION 审中-公开

    公开(公告)号：WO2023278202A1

    公开(公告)日：2023-01-05

    申请号：PCT/US2022/034328

    申请日：2022-06-21

    Applicant: COVESTRO LLC

    Inventor： CHEN, Liang

    IPC: B33Y70/00 ,  C08G18/10 ,  C08G18/44 ,  C08G18/75 ,  C09D175/16 ,  C08F290/06 ,  B29C64/124 ,  B29K2075/00 ,  B33Y10/00 ,  C08F283/006 ,  C08F290/067 ,  C08G18/755

    Abstract: Provided is a photopolymerizable composition comprising a blend of: a) from 40 wt.% to 70 wt.% of at least one urethane component; b) from 25 wt.% to 70 wt% of at least one monofunctional reactive diluent; c) from 0.1 wt.% to 5 wt.% of at least one initiator; and d) from 2 wt.% to 10 wt% of an amine-functional (meth)acrylate monomer of formula (I), C=C-CO-O-R1-NR2R3 (I); e) optionally, at least one multiple-functional reactive diluent; f) optionally, from 0.001 wt.% to 1 wt.% of an inhibitor, wherein the wt.% in all instances is based on total weight of the photopolymerizable composition, wherein at least one of R1, R2, and R3 is an alkyl group, and wherein the amine-functional (meth)acrylate monomer is not an amide. Also provided is a process of producing a photopolymerizable composition, the process comprising blending the ingredients of the prior sentence. Further provided is a process of producing a three-dimensional object, the process comprising the steps of: A) depositing the photopolymerizable composition according to the first sentence atop a carrier to obtain a layer of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; B) depositing additional photopolymerizable composition atop a previously applied layer of the construction material to obtain a further layer of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied layer, C) repeating step B) until the precursor is formed, wherein the depositing of the photopolymerizable composition at least in step B) comprises introducing energy to a selected region of the photopolymerizable composition corresponding to the respectively selected cross section of the object.

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