Phthalocyanine compounds and utility thereof

Details Phthalocyanine compounds and utility thereof Phthalocyanine compounds and utility thereof

1988-08-29

1990-11-13

Maples, John S.

Compositions

Liquid crystal compositions

2522991, 2522993, 540122, 540139, 540140, 430270, 430495, 430944, 430945, C09K 1952, C09K 1900, G03C 1492, C09B 4704

Patent

active

049700219

ABSTRACT:
Phthalocyanine compounds are described, which are represented by the following general formula (I): ##STR1## wherein R.sub.1 -R.sub.8 are individually a hydrogen atom or an alkyl or aryl group, a-h stand individually for an integer of 1-20, and M denotes two hydrogen atoms or a metal atom, metal halide, metal oxide, metal hydroxide, dialkylmetal, diarylmetal, bis(alkyloxy)metal or bis(trialkylsilyloxy)metal. Optical recording media and liquid crystal display panels, which contain at least one of the phthalocyanine compounds, are also described.

REFERENCES:
patent: 4460665 (1984-07-01), Kunikane et al.
patent: 4507374 (1985-03-01), Kakuta
patent: 4537713 (1985-08-01), Eckert
patent: 4555463 (1985-11-01), Hor et al.
patent: 4622179 (1986-11-01), EDA
patent: 4814256 (1989-05-01), Aldag et al.

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