POLYURETHANE LAYER FOR A LIGHT DIRECTING ARTICLE

    公开(公告)号:WO2017007615A1

    公开(公告)日:2017-01-12

    申请号:PCT/US2016/039297

    申请日:2016-06-24

    Abstract: The disclosed aliphatic thermoplastic polyurethane composition is well suited for use in thin, flexible light directing articles to impart flexibility, toughness, or protection to the light directing articles that contain optically active elements. The disclosed aliphatic thermoplastic polyurethanes have improved thermostability at higher temperatures. Specifically, the disclosed aliphatic thermoplastic polyurethanes have a cross-over temperature greater than 110°C. In one embodiment, the cross-over temperature is greater than 130°C. In one embodiment, the cross-over temperature is less than 170°C and a Tg greater than 35C and less than 70C.

    Abstract translation: 所公开的脂族热塑性聚氨酯组合物非常适合用于薄的柔性光引导制品以赋予含有光学活性元素的光引导制品的柔韧性,韧性或保护性。 所公开的脂族热塑性聚氨酯在较高温度下具有改善的热稳定性。 具体地,所公开的脂族热塑性聚氨酯具有大于110℃的交叉温度。 在一个实施例中,交叉温度大于130℃。 在一个实施方案中,交叉温度低于170℃,Tg大于35℃且小于70℃。

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