A leather finishing agent that can enhance the mechanical properties and ultraviolet resistance of leather and a preparation method thereof are disclosed that relate to the field of leather additives. It was prepared by using polyphenol as raw material, hexamethylene tetramine as auxiliary agent, and a protonic acid as solvent, then heating and adding water for hydrolysis and dispersion. The method has the advantages of low production cost, simple process, high preparation efficiency, green production process and environmental protection. The leather finishing agent can be used in the finishing section after leather tanning. After finishing, the mechanical properties of the leather were significantly enhanced, and its UV resistance was also significantly improved.

A leather finishing agent that can enhance the mechanical properties and ultraviolet resistance of leather and a preparation method thereof are disclosed that relate to the field of leather additives. It was prepared by using polyphenol as raw material, hexamethylene tetramine as auxiliary agent, and a protonic acid as solvent, then heating and adding water for hydrolysis and dispersion. The method has the advantages of low production cost, simple process, high preparation efficiency, green production process and environmental protection. The leather finishing agent can be used in the finishing section after leather tanning. After finishing, the mechanical properties of the leather were significantly enhanced, and its UV resistance was also significantly improved.

A manufacturing method for decorating natural leather including the steps of: jetting a decorative image with one or more radiation curable inkjet inks on a leather surface; and curing the radiation curable inkjet inks jetted on the leather surface; wherein the one or more radiation curable inkjet inks include a colorant and a polymerizable composition containing 0 to 15.0 wt % of one or more polyfunctional polymerizable compounds and at least 85.0 wt % of one or more monofunctional polymerizable compounds with the weight percentages based on the total weight of the polymerizable composition; wherein the one or more radiation curable inkjet inks include 0 to 35.0 wt % of organic solvent; and at least 85.0 wt % of one or more monofunctional polymerizable compounds; and wherein the glass transition temperature of the one or more radiation curable inkjet inks (I) is less than 25° C.; and wherein one of the one or more radiation curable inkjet inks includes a white pigment in an amount of at least 17.5 wt % based on the total weight of the radiation curable inkjet ink.

A manufacturing method for decorating natural leather employing a radiation curable white inkjet ink including more than 16 wt % of white pigment and 0 to 35 wt % of organic solvent, both weight percentages based on the total weight of the radiation curable white inkjet ink and a polymerizable composition containing 0 to 15.0 wt % of one or more polyfunctional polymerizable compounds, and at least 85.0 wt % of one or more monofunctional polymerizable compounds; and a specific polymerizable composition.

A manufacturing method for decorating natural leather including the steps of: jetting a decorative image with one or more radiation curable inkjet inks on a leather surface; and curing the radiation curable inkjet inks jetted on the leather surface; wherein the one or more radiation curable inkjet inks include a colorant and a polymerizable composition containing 0 5 to 15.0 wt % of one or more polyfunctional polymerizable compounds and at least 85.0 wt % of one or more monofunctional polymerizable compounds with the weight percentages based on the total weight of the polymerizable composition; wherein the one or more radiation curable inkjet inks include 0 to 35.0 wt % of organic solvent; and at least 85.0 wt % of one or more monofunctional polymerizable compounds; and wherein the glass transition temperature of the one or more radiation curable inkjet inks (I) is less than 25° C.

A manufacturing method for decorating natural leather with a decorative image includes applying on a crusted leather a base coat containing a pigment for providing a chromatic colour or an achromatic colour different from black, inkjet printing a colour image on the base coat using one or more pigmented UV curable inkjet inks, optionally applying a protective top coat on the image, and optionally applying a heat pressing or embossing step, wherein the chromatic colour or the achromatic colour different from black of the base coat and the inkjet printed colour image are used in combination to provide the decorative image.

A coating composition includes at least one, low Tg, polyol resin having hydroxyl groups available for crosslinking, a polyurethane crosslinker that crosslinks the hydroxyl groups when cured, and water in an amount from about 4 to 20 wt. % of the total weight of the coating composition. Characteristically, solvents other than water are present in an amount less than half the amount of water. The coating composition is advantageously used to finish leather.

The present invention relates to a composition comprising an aqueous dispersion of submicron-sized polymer particles and micron-sized polymer beads, wherein the polymer particles or beads or both are functionalized with phosphorus acid groups. The composition of the present invention is useful for providing a matte finish on substrates, such as leather, textiles, wallboard, decorative coatings, concrete, and wood, with improved stain resistance. The present invention also relates to a leather substrate coated with a clear matte finish comprising an acrylic or styrene-acrylic polymer film and micron-sized polymer beads, wherein the film or the beads or both are functionalized with a phosphorus acid monomer.

A manufacturing method of decorated natural leather including the steps of: attaching a crusted leather (45) with its corium side by an adhesive (46) to a temporary carrier (47); inkjet printing the crusted leather (45) on its grain side with one or more pigmented inkjet inks; wherein the surface area of the temporary carrier (47) is larger than the surface area of the crusted leather (45).

A method for producing a layered material, which has a substrate layer and a layer of polyurethane bonded to the substrate layer. A leather, preferably a sanded grain leather, a textile material, preferably a woven fabric or a knitted fabric, a bonded leather material, or a microfiber nonwoven is used as the substrate layer and is bonded to the layer. According to the present teaching, at least one, preferably a single, layer of frothed polyurethane foam is applied to the substrate as the layer.