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    Photochromic compound and articles containing the same
    1.
    发明授权
    Photochromic compound and articles containing the same 失效
    光致变色复合物和含有相同的物品

    公开(公告)号：US4792224A

    公开(公告)日：1988-12-20

    申请号：US50266

    申请日：1987-05-14

    申请人： Patricia L. Kwiatkowski ,  David A. Hunt

    发明人： Patricia L. Kwiatkowski ,  David A. Hunt

    IPC分类号： C07D498/10 ,  C07D498/20 ,  G02B5/23 ,  C07D265/00

    CPC分类号： C07D498/10 ,  C07D498/20

    摘要： Described are photochromic spiro (oxazolidine) substituted benzoxazine photochromic compounds and their use in plastic hosts to impart a photochromic response thereto. More particularly, there are described spiro (oxazolidine) pyrido benzoxazine and spiro (oxazolidine) naphthoxazine compounds and their use in substrates such as polymerizates of allyl digylcol carbonate.

    摘要翻译： 描述了光致变色螺（恶唑烷）取代的苯并恶嗪光致变色化合物及其在塑料宿主中的用途，以赋予光致变色响应。 更具体地，描述了螺（恶唑烷）吡啶并苯并恶嗪和螺（恶唑烷）萘并恶嗪化合物及其在诸如烯丙基二乙烯基碳酸酯的聚合物的底物中的用途。

    Process for repairing concrete structures using pneumatically sprayable cement mortar compositions containing portland cement, mineral aggregate, a styrene-butadiene copolymer latex and water
    6.
    发明授权
    Process for repairing concrete structures using pneumatically sprayable cement mortar compositions containing portland cement, mineral aggregate, a styrene-butadiene copolymer latex and water 失效
    使用含有波特兰水泥，矿物骨料，苯乙烯 - 丁二烯共聚物胶乳和水的气动喷雾水泥砂浆组合物修复混凝土结构的方法

    公开(公告)号：US4057528A

    公开(公告)日：1977-11-08

    申请号：US678280

    申请日：1976-04-19

    申请人： David A. Hunt

    发明人： David A. Hunt

    IPC分类号： C04B28/04 ,  C08L9/10

    CPC分类号： C04B28/04

    摘要： Process for repairing concrete compositions using cement mortar compositions which are capable of being pneumatically sprayed and which provide unexpectedly enhanced bonding capabilities and resistance to slump; said compositions comprising essentially a substantially non-air entraining portland cement, mineral aggregate, a styrene-butadiene copolymer latex present on a solids basis in an amount of from about 5 to about 25 percent by weight of cement, and water in an amount sufficient to provide a total water to cement ratio of from 0.22 to 0.26.

    摘要翻译： 使用能够被气动喷涂的水泥砂浆组合物修复混凝土组合物的方法，并且提供意想不到的增强的粘结能力和抗坍落度的方法; 所述组合物基本上包含基于非空气夹带的波特兰水泥，矿物骨料，以固体计基于约5至约25重量％的水泥的量存在的苯乙烯 - 丁二烯共聚物胶乳，其量足以 提供总水比为0.22至0.26。