Phthalocyanine compounds and optical recording media comprising

Details Phthalocyanine compounds and optical recording media comprising Phthalocyanine compounds and optical recording media comprising

1996-11-20

1997-12-02

Evans, Elizabeth

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428642, 428644, 428648, 428913, 430 56, 430 83, 430 96, 430135, 43027014, 43027015, 43027016, 4304951, 430945, B32B 300

Patent

active

056933967

ABSTRACT:
A near infrared light-absorbing dye comprising phthalocyanine compounds represented by the following formula (2): ##STR1## wherein in formula (2), M is two hydrogen atoms, a divalent metallic atom, a trivalent monosubstituted metallic atom, a tetravalent disubstituted metallic atom or an oxymetal atom, and L.sup.1, L.sup.2, L.sup.3 and L.sup.4 are each independently formula (a) or (b), ##STR2## in the formula (a) or (b), R.sup.1 and R.sup.3 are each a substituted or unsubstituted alkyl group, and R.sup.2 is a straight chain or branched halogenated alkyl or alkenyl group having 3 to 10 carbon atoms,
X is a chlorine, bromine or iodine atom, and m is an integer of 1 to 12, provided that formula (2) represents a mixture of L.sup.1 =L.sup.2 =L.sup.3 =L.sup.4 =formula (a), L.sup.1 =L.sup.2 =L.sup.4 =formula (a) and L.sup.3 =formula (b), L.sup.1 =L.sup.4 =formula (a) and L.sup.2 =L.sup.3 =formula (b), L.sup.1 =L.sup.3 =formula (a) and L.sup.2 =L.sup.4 =formula (b), L.sup.1 =formula (a) and L.sup.2 =L.sup.3 =L.sup.4 =formula (b), and L.sup.1 =L.sup.2 =L.sup.3 =L.sup.4 =formula (b),
and an optical recording medium comprising the phthalocyanine mixture.

REFERENCES:
patent: 5391461 (1995-02-01), Koioke et al.
patent: 5424171 (1995-06-01), Yanagisawa et al.
patent: 5474825 (1995-12-01), Okano et al.
patent: 5532033 (1996-07-01), Yashiro

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