Low-VOC leather
US8062540B2 · kind B2 · utility
4Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2008 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Dec 26, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC14C11/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A natural leather is treated with a tanning agent, a re-tanning agent, a dye and a greasing agent, wherein a treatment agent for inhibiting the generation of formaldehyde and acetaldehyde from the natural leather is added to the greasing step so that the natural leather is impregnated with the treatment agent. The treatment agent includes a hydrazide compound optionally together with sodium hydrogen sulfite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.