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2 074 866

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IPC

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Application

5055280/04, 1992-07-20

(22)

Actual filing date

1992-07-20

(45)

Published

1997-03-10

(72)

Inventor

Frolov V.G.Demina M.I.Sal'Nikova G.A.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Nauchno-Issledovatel'Skij Institut Plasticheskikh Mass Im.G.S.Petrova S Opytnym Moskovskim Zavodom Plastmass

METHOD FOR PRODUCTION OF POLYAMIDE BY ANIONIC POLYMERIZATION OF CAPROLACTAM Russian patent published in 1997 - IPC

Abstract RU 2074866 C1

FIELD: production of polyamides. SUBSTANCE: method is carried out by heating of caprolactam. The process takes place in caprolactam which contains 30-50 mass % of free caprolactam with melting point 117-131 C in the presence of diisocyanate activating agent. Solid solution of 2,4-toluylene diisocyanate being blocked by caprolactam or mixture of isomers of toluylene diisocyanate at their ratio 65:35 respectively are used as mentioned above diisocyanate activating agent. EFFECT: improves efficiency of the method. 3 tbl, 1 dwg

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RU 2 074 866 C1

Authors

Frolov V.G.

Demina M.I.

Sal'Nikova G.A.

Dates

1997-03-10—Published

1992-07-20—Filed

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