Tanning method

US4443221A · kind A · utility

Assignee

• Rohm Co., Ltd. · JP

Inventors

• Max May · Bottmingen, CH
• Rolf Monsheimer · Darmstadt, DE
• Ernst Pfleiderer · Weiterstadt, DE

Key dates

• Filing date: May 21, 1982
• Grant date: Apr 17, 1984
• Expiry date: May 21, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C14C1/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

What are disclosed are improved methods for the preparation of leather wherein, in one or more steps for preparing leather from limed animal skins or hides, including beamhouse operations such as deliming, bating, pickling, and degreasing to prepare unhaired tannable hides from animal skins or hides, and including subsequent tanning, retanning, and dyeing steps performed on said unhaired tannable hides, small amounts of a high polymeric water soluble cellulose ether or of an acrylic polymer are added to at least one of the treating baths involved in such method steps as a lubricant for said skins or hides.