Radiation absorbing compositions, methods and articles incorporating such compositions

Abstract

Infrared (IR) radiation absorbing compounds of metal or metalloids with ligands are beneficial for many applications. Schiff base biquinone (SBB) ligands surrounding a metal or metalloid center may be used for laser welding applications, as one example, wherein effective infared radiation absorption and heat resistance are required. These compounds may be known as Schiff base biquinone metal complexes (SBBC's). The compositions and methods of this invention provide examples of many different NIR absorbing compounds that exhibit high NIR absorbing strength, good thermal stability, and relatively low visible color. The IR absorbing compounds may employ one or more of the following elements: Si, Zr, Bi, Sb, Ce, Cs, K, Mo.

Description

[0001] Cross References to Related Applications [0002] This application is filed with the U.S. Patent and Trademark Office on November 23, 2005 and is entitled "RADIATION ABSORBING COMPOSITIONS, METHODS, ANDARTICLES MADE BY APPLYING SUCH COMPOSITIONS" (Radiation Absorbing Compositions, Methods, and Articles Made by Using the Compositions) ) continuation-in-part of prior U.S. application Ser. No. 11 / 285,840 (Milliken & Co. Docket No. 5906). Background technique [0003] Infrared (IR) radiation absorbing compounds find use in a number of applications. They are used in optical recording media, thermally written displays, laser printing, laser filters, IR imaging, medical uses, plastic reheating, laser welding, laser marking, and for welding safety glasses and in military applications for lasers protection. Several classes of IR absorbing compounds are known, including carbon black, inorganic pigments, metals, organic dyes and organic pigments. [0004] Several classes of or...

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Problems solved by technology

Most of these compounds are difficult and expensive to manufacture

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