A tanning agent-free leather making method is provided. A raw hide is subjected to controllable dehydration with a molecular sieve-polar organic solvent composite dehydration media to achieve a dehydrated hide, and then a tanning agent-free leather is prepared by increasing the surface roughness of the dehydrated hide and reducing the surface energy of the dehydrated hide. The present disclosure does not use any metal or non-metal tanning agent, which is eco-friendly. The present disclosure breaks the balance of water distribution between the raw hide and the polar organic solvent, which realizes a multi-medium self-driven directional controllable dehydration of the raw hide, effectively solving the problems during dehydration of the raw hide only using polar organic solvent. The molecular sieve-polar organic solvent dehydration system is easy to recover and can be recycled for the controllable dehydration of the raw hide multiple times. Therefore, a brand-new clean leather making technology is provided.

Compositions and methods for use provide enhanced surface modification in leather care. In particular, the present disclosure is directed to water-based compositions including a silicone emulsion that delivers cleaning, protective, and preservative qualities.

Compositions and methods for use provide enhanced surface modification in leather care. In particular, the present disclosure is directed to water-based compositions including a silicone emulsion that delivers cleaning, protective, and preservative qualities.

Silk processed, coated, repaired, and/or infused leather or leather articles, and methods of preparing the same are disclosed herein.

Silk processed, coated, repaired, and/or infused leather or leather articles, and methods of preparing the same are disclosed herein.

The invention is directed to a method for producing a composite material comprising a biofabricated material and a secondary component. The secondary component may be a porous material, such as a sheet of paper, cellulose, or fabric that has been coated or otherwise contacted with the biofabricated material. The biofabricated material comprises a uniform network of crosslinked collagen fibrils and provides strength, elasticity and an aesthetic appearance to the composite material.

A method for packing one or more animal hides includes a step of providing a packaging having a first packaging volume configured to contain one or more animal hides and a volume of gas. A further step includes providing the one or more animal hides inside the first packaging volume. The first packaging volume is sealed off from the surrounding environment. A microorganism growth inhibiting environment inside the first packaging volume compared to the surrounding environment is provided.

A method of preparing hydrophobicizing leather treatment compositions includes the steps of a) free-radically initiated copolymerization of i) at least one ethylenically unsaturated carboxylic acid or its derivatives, and ii) at least one (meth)acrylate of a primary saturated C.sub.8 to C.sub.22 alcohol, b) mixing the reaction mixture obtained after step a) with water, c) salting at least some of the carboxyl groups of the reaction mixture obtained after step b) with a base, and d) shearing the reaction mixture obtained after step c) to an average particle size of 0.05-10 μm,
wherein step a) is carried out in oil as reaction medium and wherein the atmosphere in step a) contains less than 0.1% by volume of an oxidizing gas.

A method of preparing hydrophobicizing leather treatment compositions includes the steps of a) free-radically initiated copolymerization of i) at least one ethylenically unsaturated carboxylic acid or its derivatives, and ii) at least one (meth)acrylate of a primary saturated C.sub.8 to C.sub.22 alcohol, b) mixing the reaction mixture obtained after step a) with water, c) salting at least some of the carboxyl groups of the reaction mixture obtained after step b) with a base, and d) shearing the reaction mixture obtained after step c) to an average particle size of 0.05-10 μm,
wherein step a) is carried out in oil as reaction medium and wherein the atmosphere in step a) contains less than 0.1% by volume of an oxidizing gas.

A heat sensitive aqueous polyurethane dispersion is provided. The heat sensitive aqueous polyurethane dispersion comprises an aqueous polyurethane dispersion; a cationic surfactant; and an anionic surfactant. A method for preparing the heat-sensitive aqueous polyurethane dispersion and a synthetic leather article comprising a film derived from the heat-sensitive aqueous polyurethane dispersion and a coating comprising the heat-sensitive aqueous polyurethane dispersion are also provided.