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2 129 163

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(51)

IPC

(21) (22)

Application

98113000/12, 1998-07-02

(22)

Actual filing date

1998-07-02

(45)

Published

1999-04-20

(72)

Inventor

Chernetskij V.N.Arkhipov P.P.Lavrent'Eva T.A.Gurova N.P.

(73)

Holder

Chernetskij Vladimir NikolaevichArkhipov Pavel PavlovichLavrent'Eva Tat'Jana AleksandrovnaGurova Nadezhda Pavlovna

SKIN TANNAGE PROCESS Russian patent published in 1999 - IPC

Abstract RU 2129163 C1

FIELD: leather industry. SUBSTANCE: invention relates to tanning skins using polymer tanning substance and mineral tanner. Skin stock is successively treated in aqueous medium at 10-70 C with 0.5-5.0% aqueous solution of N-itaconoylchitosan having degree of itaconoilation 20-90% and molecular weight 1000-100000 and chromium salts consumed in amount of 0.5-2.0% (on conversion to chromium(III) oxide) based on weight of skin. Process is carried out for 4 to 24 hr at pH 1.5 to 6.5. EFFECT: improved leather quality and reduced chromium salts consumption. 3 cl, 2 ex

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RU 2 129 163 C1

Authors

Chernetskij V.N.

Arkhipov P.P.

Lavrent'Eva T.A.

Gurova N.P.

Dates

1999-04-20—Published

1998-07-02—Filed