A method is provided for producing breathable leather material including the following steps: a leather-based material is provided; the leather-based material is perforated; a support body is provided; a finishing is applied to the support body such that a later visible side of the finishing is facing the support body and the finishing is transferred to the surface of the perforated leather-based material and removed from the support body.

A method is provided for producing breathable leather material including the following steps: a leather-based material is provided; the leather-based material is perforated; a support body is provided; a finishing is applied to the support body such that a later visible side of the finishing is facing the support body and the finishing is transferred to the surface of the perforated leather-based material and removed from the support body.

The present invention relates to a process for the production of aqueous polyurethane-polyurea dispersions comprising the steps of: A) reacting primary and/or secondary monoamines or diamines A1) with cyclic carbonate containing one hydroxy group A2) such that the molar ratio of total primary and/or secondary amine groups to cyclic carbonate groups is in the range of 0.8 to 1.2; B) producing an NCO-containing polyurethane prepolymer by reacting B1) polyisocyanates with B2) polymeric polyols and/or polyamines having number average molecular weights of more than 400 to 8,000 g/mol, optionally B3) low molecular weight compounds having number average molecular weights of 17-400 g/mol selected from the group consisting of mono- and polyalcohols, mono- and polyamines, and aminoalcohols; optionally B4) isocyanate-reactive, ionically hydrophilizing compounds, and B5) the reaction products of A); C) dispersing the prepolymer from B) in water; and D) optionally reacting the remaining free NCO groups of the prepolymer from B) with monoamines, polyamines, hydrazine and/or hydrazides, wherein the molar ratio of the NH groups to the NCO groups is from 0 to 1.2, and step D) occurs partially or completely prior to or during the dispersion step C).

A process for preserving and restoring leather upholstery through steps involving use of cleaning, dye, conditioning and sealing materials, and, prior to dying or conditioning, abrading the material, in part, for restoring access to hide pores for optimizing the hide's degree and uniformity of acceptance of dye(s) and conditioner(s).

The present invention provides aqueous composition comprising a multi-stage acrylic emulsion polymer having a first stage polymer of from 0.5 to 4 wt. %, based on the total weight of monomers used to make the first stage polymer, of a copolymerized carboxylic acid or salt group containing monomer, and having 10 to 30 wt. %, on total solids of the multi-stage acrylic emulsion polymer, of a second stage polymer of from 3 to 15 wt. % of a copolymerized hydroxyl group containing monomer, the first stage polymer having a glass transition temperature (Tg) by dynamic mechanical analysis (DMA) of less than 10 C. and the second stage polymer having a Tg (DMA) of greater than 80 C.; and (ii) from 25 to 75 wt. %, based on the total solids weight of the multi-stage acrylic polymer, of a polyurethane.

The present disclosure concerns a module (100) for inline embossing of a leather product (1) comprising a leather support sheet (2) having a surface finish layer of one or more partially cured coating layers. The module comprises an application means (10) to apply a protective foil (4) onto the partially cured layer (3) to form a laminate (5). The module also comprises a pressure group (20) including an embossing roller (21) having an outer surface with a relief structure (22) so as to emboss a negative of the surface relief structure into the leather product, across the protective foil.

A segment of leather, and a color layer comprising a pigmented coating mixed with an irreversible thermochromic dye applied to the segment of leather. The irreversible thermochromic dye comprises a first portion that is activated to provide a visible marking on the segment of leather, and a second portion that is not activated in combination create a graphic image on the segment of leather. The disclosed method comprises conditioning a segment of cover material with a base coat, applying a color coating comprising an irreversible thermochromic dye and a pigmented coating to the segment of cover material, applying a top coating to the color coating, and embossing a graphic image in the color coating with a thermal embossing tool that is heated to a temperature causing a color change of the irreversible thermochromic dye by applying pressure to a first portion of the color coating.

An additional antimicrobial protection step applied to leather in the post-tanning process which incorporates a biocide composition and an additive that allows its presence to be identified by luminescent effect, and encryption techniques of the luminescence, wherein the composition is added in the tanning process immediately after the addition of chromium or titanium salts in an amount between 0.1% and 5% of the weight of the material to be tanned and comprises silver phosphate glass; silicone; aliphatic hydrocarbons; water, and the luminescent additive is added in an amount between 0.1% and 5% of the weight of the material to be tanned and comprises calcium fluoride; erbium (III) fluoride; of ytterbium (III) fluoride; a maximum of 5% of thulium (III) fluoride; and a maximum of 5% of europium (III) fluoride, with respect to the total weight of the luminescent additive.

A method for antimicrobial protection applied to hides in the tanning process incorporating a biocidal composition and an additive allowing the identification by a luminescent effect, and using luminescence encryption techniques, wherein the composition is added in the tanning process immediately after adding the chromium or titanium salts in an amount between 0.1% and 5% by weight of the material to be tanned and comprises: silver phosphate glass; silicone; aliphatic hydrocarbons; and water, and the luminescent additive is added in an amount between 0.1% and 5% by weight of the material to be tanned and comprises silica; alumina; calcium fluoride; erbium (III) fluoride; ytterbium (III) fluoride; thulium (III) fluoride; and europium (III) fluoride.

The disclosure provides leather articles and a method for making leather articles comprising a substrate and a coating comprising a cellulose derivative having improved colorfastness to rubbing. The cellulose derivative may be methyl cellulose, ethyl cellulose, ethyl methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate, cellulose triacetate, cellulose propionate, cellulose acetate propionate, cellulose acetate butyrate, microcrystalline cellulose, cellulose nitrate, or cellulose sulfate.