Process for the retanning of mineral tanned leather
US4750906A · kind A · utility
4Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1985 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC14C3/22
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention concerns retanning agents for mineral tanned leathers. They comprise aqueous solutions of organic polymer complex compounds containing carboxyl groups doped with chromium III. The agents are characterized by high chromium depletion and retanning effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.