Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1998-10-09
2000-06-06
Angebranndt, Martin
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
43027021, 4302702, 430945, 549 3, G11B 724
Patent
active
06071672&
ABSTRACT:
The cyanine dyes of the invention are well soluble in solvents having a high evaporation rate and stable against light, and thus effective for improving productivity and realizing optical recording media, especially CD-R and DVD-R optical discs, having improved light resistance.
The optical recording medium of the invention uses a photo-stabilized cyanine dye which is obtained as a counter ion bonded compound between an anion of the formula (1) and a cation of the formula (2): ##STR1## wherein R.sub.01 and R.sub.02 each are ##STR2## wherein each of R.sub.11 and R.sub.12 is an alkyl group of 1 to 4 carbon atoms or phenyl group, ##STR3## wherein m is equal to 3, 4, 5 or 6, ##STR4## or phenyl groups; M is a transition metal; each of Z.sub.1 and Z.sub.2 is a fused benzene ring or fused naphthalene ring; each of R.sub.21 and R.sub.22 is an alkyl group; and n is equal to 0, 1 or 2.
REFERENCES:
patent: 4626496 (1986-12-01), Sato et al.
patent: 5219707 (1993-06-01), Namba
patent: 5856520 (1999-01-01), Hirako et al.
Hirako Kazuyoshi
Kimura Satoshi
Kitagawa Sumiko
Namba Kenryo
Shinkai Masahiro
Angebranndt Martin
Sumitomo Seika Chemicals Co. Ltd.
TDK Corporation
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