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    PHOTOPOLYMERIZABLE COMPOSITIONS INCLUDING A POLYURETHANE METHACRYLATE POLYMER PREPARED USING A POLYCARBONATE DIOL, ARTICLES, AND METHODS
    32.
    发明申请
    PHOTOPOLYMERIZABLE COMPOSITIONS INCLUDING A POLYURETHANE METHACRYLATE POLYMER PREPARED USING A POLYCARBONATE DIOL, ARTICLES, AND METHODS 有权

    公开(公告)号：US20210301042A1

    公开(公告)日：2021-09-30

    申请号：US17344096

    申请日：2021-06-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Thomas P. Klun ,  Zeba Parkar ,  John M. Riedesel ,  Richard J. Pokorny ,  Chad M. Amb ,  Benjamin R. Coonce ,  Robert S. Clough ,  Tianyu Wu ,  Saswata Chakraborty ,  Yongshang Lu ,  Benjamin C. Mac Murray

    IPC: C08F2/50 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00 ,  B29C64/129 ,  C08F2/44 ,  C08F220/18 ,  C08F290/06 ,  C08G18/44 ,  C08G18/67 ,  C08K5/00 ,  C08K5/3437

    Abstract: The present disclosure provides a photopolymerizable composition. The photopolymerizable composition includes a) 40-60 parts by weight of a monofunctional (meth)acrylate monomer, per 100 parts of the total photopolymerizable composition; b) a photoinitiator; and c) a polymerization reaction product of components. A cured homopolymer of the monofunctional (meth)acrylate monomer has a glass transition temperature of 125 degrees Celsius or greater. The polymerization reaction product of components includes i) a diisocyanate; ii) a hydroxy functional methacrylate; iii) a polycarbonate diol; and iv) a catalyst. The polymerization reaction product includes a polyurethane methacrylate polymer. Often, the polycarbonate diol has a number average molecular weight of greater than 1,000 grams per mole (g/mol) or a weighted average of all polycarbonate diols present in the components has a Mn of greater than 1,000 g/mol; alternatively, the polyurethane methacrylate polymer has a weight average molecular weight of 8,000 g/mol or greater. An article is also provided including the photopolymerizable composition reaction product. Further, the present disclosure provides articles and methods of making articles. Methods are additionally provided, including receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying an article; and generating, with the manufacturing device by an additive manufacturing process, the article based on the digital object. A system is also provided, including a display that displays a 3D model of an article; and one or more processors that, in response to the 3D model selected by a user, cause a 3D printer to create a physical object of an article.

    LIGHTGUIDE HAVING OPENING AND SURROUNDING CHANNEL
    33.
    发明申请
    LIGHTGUIDE HAVING OPENING AND SURROUNDING CHANNEL 有权

    公开(公告)号：US20210157044A1

    公开(公告)日：2021-05-27

    申请号：US16629595

    申请日：2018-07-30

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Tao Liu ,  Yongshang Lu ,  David C. Mercord ,  Brian W. Ostlie

    IPC: F21V8/00

    Abstract: An optical system includes a lightguide having opposing top and bottom major surfaces. A round through opening extends between the two surfaces of the lightguide. An elongated channel is formed in one of the surfaces and at least partially surrounds and is substantially concentric with the opening. The channel has a depth (d) that varies along its length. Light extractors extract light that would otherwise propagate within and along the lightguide. The features of the lightguide can be varied to optimize performance of the lightguide for various purposes.

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