Infrared absorbent compositions
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United States of America Patent
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Jun 18, 1991
Grant Date -
N/A
app pub date -
Sep 9, 1988
filing date -
Sep 9, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to an infrared absorbent composition comprising at least one of the metal complex compounds represented by formulae (I) or (II): ##STR1## wherein [Cat] represents a cation necessary for neutralizing the complex; n represents 1 or 2; M represents Cu, Co, Ni, Pd, or Pt; and R represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group; and two R's in the same ligand may combine with each other to form a ring.
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