Individual compounds that provide effective toning (or bluing) to combat yellowing within polyester articles (such as bottles, containers, and the like) are provided. Such a novel toner permits effective neutralization of yellowness while also providing highly desirable low haze and increased brightness due to a sharp absorption peak within the needed range of wavelengths (e.g., from about 565 to 590 nm) and a narrow half-height band width. Furthermore, such an individual compound is preferably liquid in nature and may thus be incorporated within an added ultraviolet absorber solution or shelf-stable dispersion to facilitate addition within target polyesters at various stages of production. The particular UV absorbers desired as additives within target polyesters also tend to exhibit certain yellowing effects that require attention as well. The inventive single bluing agent compound thus also accords effective neutralization of such UV absorber yellowing as well. Methods of production and liquid UV absorber/individual bluing agent formulations are also encompassed within this invention.
我们提供的单个化合物可提供有效的色调(或蓝调),以消除聚酯物品(如瓶子、容器等)的黄变。这种新型调色剂可有效中和黄度,同时由于在所需波长范围内(如约 565 至 590 纳米)具有尖锐的吸收峰和较窄的半高带宽度,还可提供非常理想的低雾度和更高的亮度。此外,这种单独的化合物最好是液态的,因此可以掺入添加的
紫外线吸收剂溶液或货架稳定的分散液中,以方便在不同生产阶段添加到目标聚酯中。在目标聚酯中作为添加剂的特定
紫外线吸收剂往往也会表现出某些需要注意的黄化效应。因此,本发明的单一发蓝剂化合物还能有效中和此类
紫外线吸收剂的黄化现象。本发明还包括生产方法和液体
紫外线吸收剂/单体发蓝剂配方。