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2 076 865

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C1

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IPC

(21) (22)

Application

93047064/04, 1993-10-06

(22)

Actual filing date

1993-10-06

(45)

Published

1997-04-10

(72)

Inventor

Gorbunov B.N.Rapoport Ju.M.Sitner E.Ja.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Khimikatov Dlja Polimernykh Materialov

PROCESS FOR PREPARING 2-(2'-HYDROXY-5'-METHYLPHENYL) BENZOTRIAZOLE Russian patent published in 1997 - IPC

Abstract RU 2076865 C1

FIELD: stabilizer of polymeric materials. SUBSTANCE: reagent 1: 2-nitro-2-hydroxy-5- methylphenylazobenzene. Reaction conditions: electrochemical reduction in aqueous alcoholic medium in the presence of alkaline metal hydroxide on metallic electrodes in diaphragm-free electrolyzer at 30-90 C in electrolyte containing not more than 2 moles/cubic m of silver ions. EFFECT: more efficient preparation process.

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RU 2 076 865 C1

Authors

Gorbunov B.N.

Rapoport Ju.M.

Sitner E.Ja.

Dates

1997-04-10—Published

1993-10-06—Filed

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