Pyrazoloazoleazomethine dyes
AssigneeFuji Photo Film Co., Ltd.
InventorsShigeki Yokoyama, Tadahisa Sato, Keizo Kimura, Nobuo Furutachi, Osamu Takahashi
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Abstract
A pyrazoloazoleazomethine dye represented by formula (I) ##STR1## wherein, R.sub.1 represents a substituent having a Hammett's substituent constant value of at least 0.6; Za, Zb, and Zc each represents ##STR2## (wherein R.sub.2 represents a hydrogen atom or a substituent), or .dbd.N--; when Zc=Zb is a carbon-carbon double bond, it may form a part of an aromatic ring; R.sub.3, R.sub.4, and R.sub.5 each represents a hydrogen atom or a substituent; and n represents 1 or 2; said dye may form a dimer or higher polymer by combining with each other or to a polymer through a divalent or higher valent group at R.sub.1, Za, Zb, or Zc.
Claims12
A polymer comprising a pyrazoloazoleazomethine dye of formula (I):
- ##STR24## wherein, R.sub.1 represents a substituent having a Hammett's substituent constant value of at least 0.6;
- Z.sub.a, Z.sub.b, and Z.sub.c each represents ##STR25## wherein R.sub.2 represents a hydrogen atom or a substituent, or .dbd.N--;
- when Z.sub.c =Z.sub.b is a carbon-carbon double bond, it may form a part of an aromatic ring;
- R.sub.3, R.sub.4, and R.sub.5 each represents a hydrogen atom or a substituent;
- and n represents 1 or 2;
- and wherein said dye is combined with the polymer through a divalent or higher valent group at R.sub.1, Z.sub.a, Z.sub.b or Z.sub.c wherein said polymer is a copolymer comprising ethylenically unsaturated monomers.
Dependencies are inferred from the claim text.