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2 035 479

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IPC

(21) (22)

Application

4898362/26, 1991-01-02

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Actual filing date

1991-01-02

(45)

Published

1995-05-20

(72)

Inventor

Raspopov Ju.G.Krasnobaj N.G.Rakoch A.G.Koptev I.V.Bobysheva G.A.Kvint V.A.Zhukova E.Ju.Rudakov N.N.Meshkov P.I.Bogatov K.B.

(73)

Holder

Cheljabinskij Filial Nauchno-Issledovatel'Skogo I Proektnogo Instituta Neorganicheskikh Pigmentov I Sudovykh Pokrytij Nauchno-Proizvodstvennogo Ob"Edinenija

METHOD FOR PRODUCTION OF RED IRON-OXIDE PIGMENT WITH PRESET ELECTROKINETIC CHARACTERISTICS Russian patent published in 1995 - IPC

Abstract RU 2035479 C1

FIELD: paintwork materials. SUBSTANCE: suspension of red iron-oxide pigment is prepared, and added to suspension is sodium polyphosphate in the amount of 0.25-1.5 mas.% in terms of P₂O₅ with respect to pigment, or solution of sulfuric acid up to pH=1.7-2.1. Treatment with the latter is carried out at 90-100 C for 1-2 h. Produced are pigments with negative Z-potential having no isoelectric point within the interval of 2<pH<13. Pigment fixation on material with preset electrokinetic characteristics is 80-97%. EFFECT: higher efficiency. 2 tbl

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RU 2 035 479 C1

Authors

Raspopov Ju.G.

Krasnobaj N.G.

Rakoch A.G.

Koptev I.V.

Bobysheva G.A.

Kvint V.A.

Zhukova E.Ju.

Rudakov N.N.

Meshkov P.I.

Bogatov K.B.

Dates

1995-05-20—Published

1991-01-02—Filed