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1 829 338

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Application

4727651/04, 1989-08-07

(22)

Actual filing date

1989-08-07

(45)

Published

1996-08-27

(72)

Inventor

Logvinova O.I.Gerega V.F.Dergunov Ju.I.Shnepp Ju.B.Il'In V.A.Kruglov N.N.Pakhotin O.I.

METHOD OF DIPHENYLMETHANEDIISOCYANATE SYNTHESIS Russian patent published in 1996 - IPC

Abstract SU 1829338 A1

FIELD: chemical technology. SUBSTANCE: product: diphenylmethanediisocyanate. Reagent 1: methylenediphenylurethan. Reaction conditions: thermic decomposition, sulfuric acid, benzenesulfoacid, p-toluenesulfoacid at amount 1-4 wt. -% of methylenediphenylurethan, dimethylphthalate. Product is used for producing polyurethans, varnishes, glues, films. EFFECT: improved method of synthesis.

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SU 1 829 338 A1

Authors

Logvinova O.I.

Gerega V.F.

Dergunov Ju.I.

Shnepp Ju.B.

Il'In V.A.

Kruglov N.N.

Pakhotin O.I.

Dates

1996-08-27—Published

1989-08-07—Filed

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