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2 036 933

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IPC

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Application

92012634/05, 1992-12-15

(22)

Actual filing date

1992-12-15

(45)

Published

1995-06-09

(72)

Inventor

Frolov V.G.Demina M.I.Aleksejchenko L.A.Frajshtadt V.Ja.Vasil'Ev V.A.Kazarjan L.G.Platoshkina M.G.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Institut Plasticheskikh Mass Im.G.S.Petrova S Opytnym Moskovskim Zavodom Plastmass"

METHOD OF BLOCK-COPOLYMER PREPARING Russian patent published in 1995 - IPC

Abstract RU 2036933 C1

FIELD: polymeric compounds. SUBSTANCE: method involves anion activated polymerization of caprolactam using alkaline catalyst in the presence of polymeric activator-prepolymer. The latter is a product of interaction of polybutadiene or butadiene copolymer with acrylonitrile containing hydroxyl-groups with aromatic diisocyanates at the ratio NCO:OH = 2:1-3 taken at concentration 15-20 wt.-%, at heating. Used prepolymer shows functionality 2 ± 0.1, and molar ratio between isocyanate group concentration and caprolactam alkaline salt is 1:2.0-2.7, respectively. EFFECT: improved method of copolymer preparing. 1 tbl

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RU 2 036 933 C1

Authors

Frolov V.G.

Demina M.I.

Aleksejchenko L.A.

Frajshtadt V.Ja.

Vasil'Ev V.A.

Kazarjan L.G.

Platoshkina M.G.

Dates

1995-06-09—Published

1992-12-15—Filed