Process for the preparation of a formaldehyde-free synthetic...

Details Process for the preparation of a formaldehyde-free synthetic... Process for the preparation of a formaldehyde-free synthetic...

2006-10-10

2006-10-10

Delcotto, Gregory (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

C008S094150, C252S008570, C528S230000, C528S239000

Reexamination Certificate

active

07118603

ABSTRACT:
A process for the preparation of a synthetic tanning agent is disclosed whereby multi functional polymer is polymerized with sulfonated aromatic compound, pretreated with organic ligand to form an organo-polymeric matrix, which is essentially formaldehyde-free. The product has potential application in leather industry as an eco-friendly approach to chrome tanning by eliminating the conventional pickling process and the related problem of total dissolved solids (TDS) associated with the effluent. The present invention also provides for an exhaust aid for chrome due to its multiple carboxyl groups.

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