EP0134518A1
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EP
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Naphthalocyanine compounds
Assignee: Yamamoto Chemicals Inc
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Filing: 1984-07-18
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Granted: —
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Expires: 2004-07-18
Abstract
Abstract Naphthalocyanine compounds represented by the general formula <IMAGE> wherein R1, R2, R3 and R4, which may be the same or different, are each a straight chain or branched chain alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, Nb, Al, Sn, In, Fe and Ge, or its oxide, chloride or bromide, are bluish green or green crystals and are superior in absorption of near infrared rays of 750 to 850 nm, highly resistant to light, heat, acids and alkalis, soluble in organic acids, liquid crystals and resins, and accordingly are very useful as a dyestuff capable of absorbing near infrared rays.
Inventors
- 👤 Tsunehito Eda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 03:15
CPC Classifications
C; C09; C09B; C09B47/00; C09B47/04; C09B47/045; C09B47/08; C09B47/18; C09B47/06; C09B47/067; C09B47/0673
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A process for producing a naphthalocyanine compound represented by the general formula wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are each a straight or branched alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, Nb, Al, Sn, In, Fe and Ge or its oxide, chloride or bromide, characterized in that one or more substituted dicyanonaphthalenes of the formula wherein X is one of the substituents R 1 , R 2 , R 3 and R 4 , is reacted with a metal chloride or metal oxychloride of a metal M in the presence of urea, optionally with heating.
Claim 2
Dependent Claim
128 words
A process for producing a naphthalocyanine compound represented by the general formula wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are each a straight or branched alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, Nb, Al, Sn, In, Fe and Ge or its oxide, chloride or bromide, characterized in that one or more substituted dicyanonaphthalenes of the formula wherein X is one of the substituents R 1 , R 2 , R 3 and R 4 , is reacted with a metal chloride or metal oxychloride of a metal M in the presence of urea, optionally with heating.
Claim 3
Dependent Claim
82 words
The use of a naphthalocyanine compound represented by the general formula wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are each a straight or branched alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, Nb, Al, Sn, In, Fe and Ge or its oxide, chloride or bromide, as a near infrared rays-absorbing dyestuff.
Claim 4
Dependent Claim
82 words
The use of a naphthalocyanine compound represented by the general formula wherein R 1 , R 2 , R 3 and R 4 , which may be the same or different, are each a straight or branched alkyl group of 5 to 12 carbon atoms and M is a metal selected from the group consisting of Cu, Ni, Mg, Pb, Pd, V, Co, Nb, Al, Sn, In, Fe and Ge or its oxide, chloride or bromide, as a near infrared rays-absorbing dyestuff.
Claim 5
Dependent Claim
29 words
Use according to claim 2 of a compound, in which each of the residues R 1 , R 2 , R 3 and R 4 is a tert-amyl group.
Claim 6
Dependent Claim
32 words
Use according to claim 2 of a compound, in which the residues R 1 , R 2 , R 3 and R 4 are a mixture of secondary and tertiary amyl groups.
References Cited (Backward Citations)
FR1580683A
Cited
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