US 7,772,415 B2 · 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.

Claims5

Dependent claims

A compound, said compound comprising:

wherein:
(a) R1, R2, R3 and R4 are independently selected from the group consisting of:
alkyl, branched alkyl, cycloalkyl, aryl, substituted aryl, heteroaryl, alkoxy, halogen, dialkylamino, polyoxyalkylene, carboxyl, acyl, and hydrogen;
and
(b) n is from about 1 to about 4;
and
(c) M is Si.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/451,028Filed 12 Jun 2006 · continuation in part

Priority

23 Nov 2005

Published

US 2007/0113967 A124 May 2007

Granted

10 Aug 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

C07F 9/005
Compounds containing elements of Groups 5 or 15 of the Periodic Table: compounds of elements of Group 5 of the Periodic Table without metal-carbon…
C07C 215/82
Of the same non-condensed six-membered aromatic ring: having the nitrogen atom of at least one of the amino groups further bound to a carbon atom…
C07C 251/22
Having carbon atoms of imino groups being part of rings other than six-membered aromatic rings: quinone imines
C07F 7/07
Esters of silicic acids: cyclic esters

Radiation absorbing compositions, methods and articles incorporating such compositions

Life of this patent

Radiation absorbing compositions, methods and articles incorporating such compositions

Life of this patent

Abstract

Claims5