Process for retanning leather
AssigneeTFL Ledertechnik GmbH
InventorsJens Fennen, Eric Kientz, Florian Döppert, Nina Schulte
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a process for retanning leather comprising the steps of: a) providing tanned or pre-tanned leather b) treating the tanned leather of step a) with a composition comprising hollow microspheres, preferably as an aqueous composition, the hollow microspheres have a true density of from 0.01 to 0.10 g/cm3 (25° C.) and/or a bulk density of the dry powder of 0.005 to 0.06 g/cm3 (25° C.), c) drying, whereby the temperature of the leather during drying does not exceed 75° C. as well as to leather obtained by said process.
Claims22
A process for retanning leather comprising the steps of:
- a) providing tanned or pre-tanned leather,
- b) treating the tanned or pre-tanned leather of step a) with a composition comprising expanded hollow microspheres having a true density of from 0.01 to 0.10 g/cm3 (25° C.) and/or a bulk density of a dry powder of the expanded hollow microspheres of from 0.005 to 0.06 g/cm3 (25° C.), and
- c) drying, whereby a temperature of the leather during drying does not exceed 75° C.
Dependencies are inferred from the claim text.