LEATHER-LIKE MACROPOROUS MATERIAL AND A METHOD FOR MANUFACTURING THE SAME Russian patent published in 2007 - IPC C14C13/00 C08H1/06 

FIELD: leather industry.

SUBSTANCE: material and manufacturing procedure relate to macroporous collagen-containing materials accessible via processing of collagen-containing slurries showing complex of physico-mechanical and hygienic properties usually being characteristic of leather made from animal skins and which can be used in leather industry. Leather-like macroporous material contains collagen, tanned leather fibers, and polymer possessing capability of joining collagen fibers into one indivisible structure, amount of said polymer corresponding to 3-30% based on the summary weight of collagen and leather fibers. Method for manufacturing leather-like macroporous material envisages use of freezing followed by vacuum drying to residual moisture no higher than 12%, ageing at room temperature for 1 day period, treatment with aqueous polymer dispersion providing joining of collagen fibers into indivisible structure, and additional vacuum drying at temperature no lower than polymer film-formation temperature and no higher than temperature of the beginning of thermal shrinkage of collagen fibers.

EFFECT: improved physico-mechanical properties of leather-like macroporous sheet material and simplified manufacturing procedure.

4 cl, 4 ex