Abstract

A method for obtaining fireproof leather of animal origin is described, comprising the steps of stabilizing the pH of the leather through a buffer solution, treating the leather with a solution of synthetic tannins, washing with water and oxalic acid adapted to remove synthetic tannin residues.

IPC Classes  ?

• C08G 18/08 - Processes
• C09D 175/04 - Polyurethanes
• C14C 11/00 - Surface finishing of leather
• C14C 13/02 - Manufacture of technical leather
• D06P 1/81 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using dyes dissolved in inorganic solvents
• C14C 3/22 - Chemical tanning by organic agents using polymerisation products
• C14C 3/28 - Multi-step processes
• C14C 9/02 - Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring
• D06P 1/00 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed