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2 045 578

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IPC

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Application

93026762/12, 1993-05-26

(22)

Actual filing date

1993-05-26

(45)

Published

1995-10-10

(72)

Inventor

Romanova E.V.Stavtsev G.A.Shimenovich B.S.Kopylov V.M.Polozenko G.N.Shishkin V.A.

(73)

Holder

Nauchno-Proizvodstvennoe Ob"Edinenie Nauchno-Issledovatel'Skij Institut Kozhevenno-Obuvnoj Promyshlennosti"

METHOD OF PREPARING SYNTHETIC TANNING AGENT FOR LIGHT LEATHER Russian patent published in 1995 - IPC

Abstract RU 2045578 C1

FIELD: processing of leather. SUBSTANCE: diphenylolpropanol is sulfurized, the process is followed by polycondensation with formaldehyde. Thus prepared product is treated by partially polymerized nitrilacryl acid. The process is carried out within 1-2 at 50-70 C. Ratio of mentioned above components is as follows: diphenylolpropanol 30-40, sodium sulfite 6-10, formaldehyde 6-8, nitrilacryl acid 4-6 and water. EFFECT: improves efficiency of the method. 2 tbl

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RU 2 045 578 C1

Authors

Romanova E.V.

Stavtsev G.A.

Shimenovich B.S.

Kopylov V.M.

Polozenko G.N.

Shishkin V.A.

Dates

1995-10-10—Published

1993-05-26—Filed

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