Natural grain leather

Details Natural grain leather Natural grain leather

C - Chemistry, Metallurgy

14

C

C14C 11/00 (2006.01)

Patent

CA 2502456

A leather finishing process in which, in pertinent part, a warm water milling step is added after the base coat is applied to "crust" leather and cured. The warm water contains at least one dye fixation agent including but not limited to about 0.1-2.0% by weight of formic acid. Moreover, the base coat itself is an aqueous base coat containing at least two polymers such as an acrylic salt or a polyurethane salt. Between the polymeric constituents of the base coat, the acid fixation agent, and the use of the warm water milling step after the base coat has been applied and dried, a surprisingly natural feel to the leather is attained without loss of excellent adhesion, wear-resistance and other properties when the leather is completely finished.

L'invention concerne un procédé de finition du cuir qui consiste, dans sa partie pertinente, à ajouter une étape de foulage à l'eau tiède après application d'un revêtement de fond au cuir <= en croûte >= et traitement. L'eau tiède contient au moins un agent de fixation de colorant comprenant notamment environ 0,1-2,0 % en poids d'acide formique. De plus, le revêtement de fond, lui-même aqueux, contient au moins deux polymères, par exemple un sel acrylique ou un sel de polyuréthanne. Du fait des constituants polymères du revêtement de fond, de l'agent de fixation acide, et de l'utilisation de l'étape de foulage à l'eau tiède après application et séchage du revêtement de fond, une sensation étonnamment naturelle est conférée au cuir sans perte des propriétés excellentes d'adhésion, de résistance à l'usure, notamment, lorsque le cuir est entièrement fini.

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