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2 034 939

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IPC

(21) (22)

Application

4520639/05, 1989-09-21

(22)

Actual filing date

1989-09-21

(45)

Published

1995-05-10

(72)

Inventor

Oprits Z.G.Smirnova A.I.Abramova N.S.Baranovskaja R.P.Nikitina S.P.Lazutkina T.P.

(73)

Holder

Nauchno-Proizvodstvennoe Ob"Edinenie

METHOD FOR PREPARING SOLUTION FOR FORMATION OF LIGHT-PROTECTING POLYIMIDE FIBER Russian patent published in 1995 - IPC

Abstract RU 2034939 C1

FIELD: astronautics. SUBSTANCE: technical carbon is mixed with dispersing agent and with amide solvent within 8-10 h. Then polyamide acid is added and mixing within 8-10 h is carried out. Ratio of technical carbon, dispersing agent, solvent and polyamide acid is 1.0:0.07-0.1-0.1:9.5-11.0: 4.0-5.0. Polyamide acid having concentration 10-18 mass % is added into thus prepared solution till concentration of technical carbon is 2-4 % of polymer mass. Vinyltrioxysilane is used as mentioned above dispersing agent. EFFECT: improves efficiency of the method. 2 cl

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RU 2 034 939 C1

Authors

Oprits Z.G.

Smirnova A.I.

Abramova N.S.

Baranovskaja R.P.

Nikitina S.P.

Lazutkina T.P.

Dates

1995-05-10—Published

1989-09-21—Filed