| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a near infrared ray-absorbing pigment comprising a diimonium salt, and a near infrared ray-blocking filter using the pigment, and to provide a near infrared ray-blocking filter produced by using a near infrared ray-absorbing resin composition, and excellent in heat resistance and in moist heat resistance. <P>SOLUTION: This invention relates to a near infrared ray-absorbing pigment containing a diimonium salt represented by general formula (1), and to a near infrared ray-blocking filter produced by including the near infrared ray-absorbing pigment. The near infrared ray-blocking filter is excellent in heat resistance and in moist heat resistance. In the general formula (1), X<SP POS="POST">-</SP>is preferably one kind selected from a group comprising hexafluorophosphoric acid ion, tetrafluoroboric acid ion, hexafluoroantimonic acid ion, bis(trifluoromethanesulfonyl)imidic acid ion and bis(fluorosulfonyl)imidic acid ion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
