Photochromic optical article
    2.
    发明授权
    Photochromic optical article 有权
    光致变色光学制品

    公开(公告)号:US07261843B2

    公开(公告)日:2007-08-28

    申请号:US10793582

    申请日:2004-03-04

    Abstract: Describes a photochromic article, e.g., an ophthalmic photochromic plastic article, such as a lens, in which the article includes (1) a rigid substrate, e.g., a transparent substrate such as a glass or organic polymeric substrate, as for example, a thermoset or thermoplastic substrate, (2) a photochromic polymeric coating appended to at least a portion of at least one surface of the substrate, the photochromic polymeric coating containing a photochromic amount of at least one organic photochromic material, e.g., spirooxazine, naphthopyran, diarylethene and/or fulgide, and (3) a thermally cured transparent thermoset polymeric coating superposed on, e.g., coherently appended to, the photochromic coating, the thermally cured polymeric coating being harder than the photochromic polymeric coating. Describes also the aforedescribed photochromic article having an abrasion-resistant coating affixed to the thermally cured polymer coating, e.g., an abrasion-resistant coating comprising an organo silane; and a photochromic article having an antireflective coating affixed to the abrasion-resistant coating.

    Abstract translation: 描述光致变色制品,例如眼睛光致变色塑料制品,例如透镜,其中制品包括(1)刚性基底,例如透明基底,例如玻璃或有机聚合物基底,例如热固性 或热塑性基材,(2)附着到基材的至少一个表面的至少一部分的光致变色聚合物涂层,所述光致变色聚合物涂层含有光致变色量的至少一种有机光致变色材料,例如螺恶嗪,萘并吡喃,二芳基乙烯和 /或fulgide,和(3)叠加在例如相干地附着到光致变色涂层上的热固化的透明热固性聚合物涂层,热固化聚合物涂层比光致变色聚合物涂层硬。 还描述了上述具有固化到热固化聚合物涂层上的耐磨涂层的光致变色制品,例如包含有机硅烷的耐磨涂层; 以及具有附着在耐磨涂层上的抗反射涂层的光致变色制品。

    Method for preparing phenolic foams using anhydrous aryl sulfonic acid
catalysts
    5.
    发明授权
    Method for preparing phenolic foams using anhydrous aryl sulfonic acid catalysts 失效
    使用无水芳基磺酸催化剂制备酚醛泡沫的方法

    公开(公告)号:US4478958A

    公开(公告)日:1984-10-23

    申请号:US396707

    申请日:1982-07-09

    Abstract: The present invention is directed to a method of preparing a phenolic foam that has cell walls which are substantially free of perforations. The method comprises using certain anhydrous aryl sulfonic acids as the foaming and curing catalysts. The useful anhydrous aryl sulfonic acids are those which have a pKa of less than about 2.0 and which change the compatibility of the phenolic resole with water. The preferred anhydrous aryl sulfonic acid is a combination of toluene sulfonic acid and xylene sulfonic acid. The invention is also directed to a phenolic foam having cell walls which are substantially free of perforations and to foamable phenolic resole compositions for preparing the phenolic foam.

    Abstract translation: 本发明涉及一种制备酚醛泡沫体的方法,其具有基本上没有穿孔的泡孔壁。 该方法包括使用某些无水芳基磺酸作为发泡和固化催化剂。 有用的无水芳基磺酸是pKa小于约2.0并且改变酚醛树脂与水的相容性的那些。 优选的无水芳基磺酸是甲苯磺酸和二甲苯磺酸的组合。 本发明还涉及具有基本上没有穿孔的泡孔壁和用于制备酚醛泡沫体的可发泡酚醛树脂组合物的酚醛泡沫体。

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