NOVEL DUAL CURE 3D PRINTING RESINS
    2.
    发明公开

    公开(公告)号:US20240279508A1

    公开(公告)日:2024-08-22

    申请号:US18574354

    申请日:2022-06-21

    Applicant: COVESTRO LLC

    Inventor: Liang CHEN

    Abstract: Provided is a composition comprising: A) an aliphatic polyurethane which comprises a reaction product of a first aliphatic polyisocyanate, a first polyol, and a thiol, optionally in the presence of a catalyst, and B) a urethane (meth)acrylate prepolymer, optionally a reactive diluent, and a photoinitiator, wherein the urethane (meth)acrylate prepolymer comprises a reaction product of a second aliphatic polyisocyanate, a second polyol and an acrylate, wherein the reactive diluent comprises a (meth)acrylate monomer, wherein the first aliphatic polyisocyanate and second aliphatic polyisocyanate may be identical or different, and wherein the first polyol and the second polyol may be identical or different. Also provided is a process comprising combining: A) a polyurethane which comprises a reaction product of a first aliphatic polyisocyanate, a first polyol, and a thiol, optionally in the presence of a catalyst, and B) a urethane (meth)acrylate prepolymer, a reactive diluent, and a photoinitiator, wherein the urethane (meth)acrylate prepolymer comprises a reaction product of a second aliphatic polyisocyanate, a second polyol and an acrylate, wherein the reactive diluent comprises a (meth)acrylate monomer, wherein the first aliphatic polyisocyanate and second aliphatic polyisocyanate may be identical or different, and wherein the first polyol and the second polyol may be identical or different. The compositions of the invention may find use in 3D printing applications.

    Aqueous ink compositions
    9.
    发明授权

    公开(公告)号:US11795612B2

    公开(公告)日:2023-10-24

    申请号:US18021331

    申请日:2022-07-26

    Inventor: Derek Illsley

    CPC classification number: C09D11/38 C09D175/04 C09D175/14

    Abstract: The invention provides an aqueous printing ink composition comprising a polyurethane dispersion, wherein the polyurethane of the polyurethane dispersion comprises the properties of (a) ketone or aldehyde groups present at one or more polymer chain ends; (b) a number average molecular weight ≤50,000, more preferably ≤25,000 and; (c) the content of ketone and/or aldehyde groups is in the range 0.02 to 4.0 mmol g−1, based on the dry polymer weight.

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