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    NOVEL DUAL CURE 3D PRINTING RESINS
    15.
    发明申请
    NOVEL DUAL CURE 3D PRINTING RESINS 审中-公开

    公开(公告)号：WO2023278201A1

    公开(公告)日：2023-01-05

    申请号：PCT/US2022/034317

    申请日：2022-06-21

    Applicant: COVESTRO LLC

    Inventor： CHEN, Liang

    IPC: C08F290/06 ,  C08G18/10 ,  C08G18/38 ,  C08G18/44 ,  C08G18/73 ,  B29C64/124 ,  B33Y10/00 ,  B33Y70/00 ,  C08F290/067 ,  C08G18/3206 ,  C08G18/3218 ,  C08G18/3876 ,  C08G18/4825 ,  C08G18/672

    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.

    RADIATION-CURABLE AQUEOUS POLYURETHANE DISPERSIONS
    19.
    发明申请
    RADIATION-CURABLE AQUEOUS POLYURETHANE DISPERSIONS 审中-公开

    公开(公告)号：WO2021140152A1

    公开(公告)日：2021-07-15

    申请号：PCT/EP2021/050189

    申请日：2021-01-07

    Applicant: DSM IP ASSETS B.V.

    Inventor： VAN DER HOEVEN-VAN CASTEREN, Ilse ,  VAN OORSCHOT, Josephus, Christiaan ,  TENNEBROEK, Ronald ,  HÖNEN, Paulus, Johannes, Maria

    IPC: C08G18/08 ,  C08G18/34 ,  C08G18/67 ,  C08L75/16 ,  C09D11/30 ,  C08G18/0823 ,  C08G18/348 ,  C08G18/672 ,  C09D11/101 ,  C09D11/102 ,  C09D11/322

    Abstract: The present invention is directed to a radiation-curable aqueous dispersion comprising a (meth)acryloyl functional polyurethane A comprising anionic dispersing groups and non-ionic dispersing groups, characterized in that (i) said polyurethane A comprises (meth)acryloyl ester functional groups in an amount of at least 0.5 mmol per g of the polyurethane A, (ii) said anionic dispersing groups comprising carboxylate and sulfonate dispersing groups, (iii) said carboxylate and sulfonate dispersing groups are present in said polyurethane A in an amount such as to result in an acid number of from 2 to 30 mg KOH/g of the polyurethane A, (iv) said carboxylate and sulfonate dispersing groups are individually present in said polyurethane A in an amount such as to result in an acid number of from 1 to 15 mg KOH/g of said polyurethane A, (v) said non-ionic dispersing groups are polyethylene oxide dispersing groups composed of at least 5 ethylene oxide repeating units, and (viii) said polyethylene oxide dispersing groups are present in said polyurethane A such that the ethylene oxide content in the polyurethane A is from 2 to 20 wt.%.

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