Process for production of monoazo lake coated with water-insolub

Details Process for production of monoazo lake coated with water-insolub Process for production of monoazo lake coated with water-insolub

1990-08-08

1992-09-01

Lee, Mary C.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534581, 534739, 534874, 534882, 106 23, 106496, C09B 6300, C09D 1100

Patent

active

051440148

ABSTRACT:
A monoazo lake which comprises a monoazo dye, a lake-forming metal and a water-insoluble metal salt of a rosin, and which is coated with the water-insoluble water salt of the rosin, the lake-forming metal being at least one metal selected from calcium, barium and strontium, the metal of the water-insoluble metal salt being at least one metal selected from zinc, aluminum, copper and manganese, and a process for the production of a monoazo lake coated with a water-insoluble metal salt of a rosin, which comprises carrying out the following steps (1) and (2) in the order of (1) to (2) or (2) to (1):
(1) a step of forming a monoazo lake by forming a lake of a monoazo dye with a metal salt of at least one metal for formation of a lake of the monoazo dye selected from calcium, barium and strontium, and
(2) a step of forming the water-insoluble metal salt of the rosin by insolubilizing the rosin with a metal salt of at least one metal for insolubilization of the rosin selected from zinc, aluminum, copper and manganese.

REFERENCES:
patent: 2350522 (1944-06-01), O'Neal
patent: 3036059 (1962-05-01), Ehrhardt et al.
patent: 4143036 (1979-03-01), Stefancsik

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