Single compound toners for use in polyesters

Details Single compound toners for use in polyesters Single compound toners for use in polyesters

2005-04-05

2005-04-05

Shosho, Callie (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S084000

Reexamination Certificate

active

06875811

ABSTRACT:
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.

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Machine Translation of JP 2000-037761 A (2000).*
International Search Report; Form PCT/ISA/220 (Apr. 2002); dated Aug. 12, 2003.

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