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2 007 391

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IPC

(21) (22)

Application

4944077/04, 1991-06-10

(22)

Actual filing date

1991-06-10

(45)

Published

1994-02-15

(72)

Inventor

Konstantinov I.I.Esin O.V.Kormushechkina A.I.Kurchenko E.V.

(73)

Holder

Nauchno-Issledovatel'Skij I Proektnyj Institut Karbamida I Produktov Organicheskogo Sinteza

METHOD OF POLYPHENYLENE-POLYMETHYLENE-POLYISOCYANATE MIXTURE SYNTHESIS Russian patent published in 1994 - IPC

Abstract RU 2007391 C1

FIELD: organic chemistry. SUBSTANCE: product - mixture of polyphenylene-polymethylene-polyisocyanates. Reagent 1: isocyanatocarbamoyl chloride obtained by condensation of aniline with formalin following by phosgenation. Reagent 2: phenylisocyanate (1-3 mole per 1 mole formalin). Reaction conditions: heating at 150-170 C in the presence of catalyst - ammonium, zinc, iron, tin chlorides taken at concentration 1-3 % by weight of reaction mass mixture. EFFECT: improved method of synthesis. 2 tbl

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RU 2 007 391 C1

Authors

Konstantinov I.I.

Esin O.V.

Kormushechkina A.I.

Kurchenko E.V.

Dates

1994-02-15—Published

1991-06-10—Filed