Enzymatic unhairing agent for use in tanning for producing...

Details Enzymatic unhairing agent for use in tanning for producing... Enzymatic unhairing agent for use in tanning for producing...

2005-03-15

2005-03-15

Witz, Jean C. (Department: 1651)

Chemistry: molecular biology and microbiology

Enzyme , proenzyme; compositions thereof; process for...

Hydrolase

C435S253500, C435S265000, C510S392000

Reexamination Certificate

active

06867032

ABSTRACT:
The invention provides an enzymatic unhairing agent for use in an unhairing step in tanning for producing leather comprising an alkaline protease as an active component; a treatment solution comprising a pH-adjusting agent and the enzymatic unhairing agent; a method for enzymatic unhairing treatment in tanning for producing leather comprising contacting the treatment solution with a raw hide or skin; and a leather thus produced. According to the invention, it is attained markedly reduction of the pollution load in the unhairing waste water and leather and recovered hairs both of good quality can be obtained.

REFERENCES:
patent: 3840433 (1974-10-01), Aunstrup et al.
patent: 4288556 (1981-09-01), Belloc et al.
patent: 5508195 (1996-04-01), Christner et al.
patent: 6156557 (2000-12-01), Moriyama et al.
patent: 1 084 213 (1967-09-01), None
patent: 2000-60547 (2000-02-01), None
patent: 1715840 (1992-02-01), None
patent: WO 9406942 (1994-03-01), None

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