Phthalocyanines
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United States of America Patent
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Jan 1, 2002
Grant Date -
N/A
app pub date -
Feb 3, 1997
filing date -
Feb 2, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Phthalocyanine compounds substituted by from 1 to 8 substituents of formula (--O--R--O--) wherein R is a 1,2-arylene group are provided. Preferably, the phthalocyanine compounds are substituted by catechol. Additional substituents which may be present include hydrocarlyloxy, hydrocarbylthio, halogen and sulphonic acid or a salt thereof.
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