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    • 86. 发明授权
    • Solid particle dispersions for imaging elements
    • 用于成像元件的固体颗粒分散体
    • US5750323A
    • 1998-05-12
    • US698378
    • 1996-08-15
    • Raymond Peter ScaringeDavid Darrell MillerMary Christine BrickLeslie ShuttleworthMargaret Jones HelberSteven Evans
    • Raymond Peter ScaringeDavid Darrell MillerMary Christine BrickLeslie ShuttleworthMargaret Jones HelberSteven Evans
    • B01J13/00G03C1/005G03C1/83G03C7/388G03C1/06G03C1/10G03C1/38
    • G03C1/83G03C1/005G03C7/388G03C1/832
    • Solid particle dispersions of compounds useful in imaging elements can be made with substantially improved stability to particle growth by dispersing the compound of interest in the presence of a relatively small amount of a second compound that is structurally similar to the compound of interest. This second compound is combined with the compound of interest prior to dispersing the compound of interest, i.e., prior to milling in the case of milled dispersions, and prior to precipitation in the case of pH or solvent precipitated dispersions. While being distinct, the second compound has a similar chemical structure to the main compound. More specifically, the second compound and first compound each comprise an identical structural section thereof which makes up at least 75% of the total molecular weight of the first compound, and the second compound has at least one substituent bonded to the identical structural section which has a molecular weight higher than the corresponding substituent of the first compound. In preferred embodiments of the invention, the compound useful in imaging elements is a compound useful in photographic or thermal transfer printing elements, and the resulting stabilized dispersion is used in preparing a photographic or thermal transfer printing element.
    • 用于成像元件的化合物的固体颗粒分散体可以通过在相当少量的结构上类似于感兴趣的化合物的相对少量的第二化合物的存在下分散感兴趣的化合物,从而具有显着提高的颗粒生长稳定性。 在分散感兴趣的化合物之前,即在研磨的分散体的情况下,在研磨之前,并且在pH或溶剂沉淀分散体的情况下,在沉淀之前,将该第二化合物与感兴趣的化合物组合。 虽然不同,第二化合物与主要化合物具有相似的化学结构。 更具体地,第二化合物和第一化合物各自包含相同的结构部分,其占第一化合物的总分子量的至少75%,并且第二化合物具有至少一个与相同结构部分键合的取代基,其具有 分子量高于第一化合物的相应取代基。 在本发明的优选实施方案中,可用于成像元件的化合物是用于照相或热转印打印元件的化合物,所得稳定的分散体用于制备照相或热转印打印元件。