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1 812 701

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A1

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IPC

(21) (22)

Application

4897622/02, 1990-12-29

(22)

Actual filing date

1990-12-29

(45)

Published

1995-08-20

(72)

Inventor

Evstifeev E.N.Smirnov V.N.Oleshko P.R.Podobed A.F.Zakharov V.I.Babenkov V.A.

COMPLEX MODIFIER OF TECHNICAL LIGNOSULFONATES Russian patent published in 1995 - IPC

Abstract SU 1812701 A1

FIELD: foundry engineering. SUBSTANCE: (KM) has additional binders SP-97 and pyrogallol "A" treated solution. Ingredients are taken in the following proportion, mass/per cent: binders (SP-97) based on dianhydride of benzophenontetracarbone acid mixed with organic solvents 0,4-1,2, pyrallol "A" solution spent during acetylene production 0,6-2,6, mixture of bottoms of organic synthesis is the rest. Such composition of modifier of technical lignosulfonates stabilizes core strength in hot and cold states. EFFECT: improved quality. 3 tbl

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SU 1 812 701 A1

Authors

Evstifeev E.N.

Smirnov V.N.

Oleshko P.R.

Podobed A.F.

Zakharov V.I.

Babenkov V.A.

Dates

1995-08-20—Published

1990-12-29—Filed

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