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2 061 718

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C1

(51)

IPC

(21) (22)

Application

5030875/04, 1992-03-05

(22)

Actual filing date

1992-03-05

(45)

Published

1996-06-10

(72)

Inventor

Siling S.A.Meshcherjakova V.S.

(73)

Holder

Institut Ehlementoorganicheskikh Soedinenij Im. A.N.Nesmejanova Ran

METHOD FOR PRODUCTION OF POLYHEXAZOCYCLANES Russian patent published in 1996 - IPC

Abstract RU 2061718 C1

FIELD: production of pigments. SUBSTANCE: method involves polycondensation of tetranitrile of pyromellitic acid with p-phenylene diamine and with cobalt salt, their molar ratio being 1:2:0.5. Method is carried out by two-stepped supplying of components into reaction by equal portions. The process takes place at 160-180 C in the medium of phenol in atmosphere of inert gas by mixing. Said process is carried out till liberation of ammonia takes place. EFFECT: improves quality of desired product. 1 tbl

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RU 2 061 718 C1

Authors

Siling S.A.

Meshcherjakova V.S.

Dates

1996-06-10—Published

1992-03-05—Filed

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