Phthalocyanine compound and optical recording medium containing

Details Phthalocyanine compound and optical recording medium containing Phthalocyanine compound and optical recording medium containing

1997-01-06

1998-05-12

Shah, Mukund J.

Stock material or miscellaneous articles

Circular sheet or circular blank

540122, G03G 506

Patent

active

057502293

ABSTRACT:
A phthalocyanine represented by the formula (1) ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is independently an alkyl group substituted by 0 to 5 halogen atoms and having 1 to 20 carbon atoms, an alkenyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms or an alkynyl group substituted by 0 to 5 halogen atoms and having 2 to 20 carbon atoms, and at least one of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is substituted by the halogen atom; X is a halogen atom; each of k, l, m and n is independently a value of from 0 to 3; each of o, p, q and r is independently a value of 0, 1 or 2, and all of them are not 0 simultaneously; each sum of k and o, l and p, m and q, and n and r is independently in the range of from 0 to 4; Met is two hydrogen atoms, a di, monosubstituted tri, disubstituted ter metal atom or an oxymetal atom. The above phthalocyanins can be used to provide optical recording medium.

REFERENCES:
patent: 4814256 (1989-03-01), Aldag et al.
patent: 5270463 (1993-12-01), Itoh et al.
patent: 5280114 (1994-01-01), Itoh et al.

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