Phosphorescent materials

Details Phosphorescent materials Phosphorescent materials

1991-06-24

1992-03-31

Niebling, John

Compositions

Organic luminescent material containing compositions

Synthetic resin containing

C09K 1102

Patent

active

051005808

ABSTRACT:
An organic phosphor which is a solid insoluble in water and organic solvents and which may be used in a phosphorescent printing ink or a paper coating composition comprises molecules of at least one phosphorescent activator held within a matrix of a condensation resin that does not itself absorb ultraviolet or visible radiation at the excitation and emission frequencies of the phosphorescence activator(s). The phosphorescence activator(s) is/are a compound or mixtures of compounds of the general formula

REFERENCES:
patent: 3744877 (1973-07-01), Stamm
patent: 3867302 (1975-02-01), Takano et al.
patent: 4022709 (1977-05-01), Ferro et al.
patent: 4089995 (1978-05-01), Ferro et al.
patent: 4201808 (1980-05-01), Cully et al.
patent: 4500116 (1985-02-01), Ferro et al.
patent: 4637988 (1987-01-01), Hinshaw et al.
patent: 4647400 (1987-03-01), Dubroca et al.

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