An improved iron tanned leather is produced by the use of a novel acidic aqueous solution containing ferric iron and citric acid as essential ingredients. Optionally, glycerine may be added. This solution is used substantially according to known tanning procedures. The novel leather obtained is characterized by a pleasing light-fast, tan color, a shrink temperature which compares favorably with that required of the more expensive chrome tanning and stability of aging. On ashing at 1,000.degree.C...

Leather products that are well lubricated, impermeable and water-repellent are produced by impregnating tanned leather under alkaline conditions with an aqueous emulsion of an emlsifier carboxylic acids or anhydrides containing at least 16 carbon atoms, in particular polyisobutenyl succinic acid or its anhydride containing at least 30 carbon atoms, or its sulphonic derivative followed by retanning with basic solutions or with the emulsion which is also covered may additionally contain fatty acid...

Bonding of leather to leather without the use of any adhesives is achieved by pressing together the two leather portions to be bonded at a pressure of at least about 50 bar and at a bonding temperature of from about 60.degree. to about 200.degree. C. for at least 10 seconds and subsequently cooling them or allowing them to cool while maintaining a pressure of at least about 10 bar at any time during said cooling when the temperature is above about 85.degree. C., the entire process being conducte...

A leather or leather-like composite material that supports a layer of soft foam laminated to its back side, the outside of which foam is flocked with textile staple fibers. When this material is manufactured, the back side of a leather or a leather-like material is laminated to a layer comprised of a soft foam, whose outside oriented away from the leather or leather-like material is flocked with staple fibers.

An improved method for dyeing leather wit propylene glycol monomethyl ether (PGME) systems comprising adding polyacrylate resins base, C-3 and C-4 alcohols, and n-butyl acetate and negating the need for aqueous compositions, Teflon dispersions, dibutyl phthalate, and improves the dye penetration, hastens the flash times, improves the dust free time, and improves the tape time.

Leather is tanned by cross-linking collagen with tris(hydroxymethyl)phosphine or a condensate of a tetrakis(hydroxymethyl)phosphonium salt with an amide or amine in a main tannage or retannage.

Artificial leather has a base sheet and a resin layer arranged on at least one side of the base sheet. The resin layer comprises a polyurethane having side chains derived from a fluorine-containing diol represented by the following formula (I): ##STR1## wherein R.sub.f represents a perfluoroalkyl or perfluoroalkenyl group having 1 to 20 carbon atoms; X represents a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenylene group represented...

An improved method for dying leather with propylene glycol monomethyl ether (PGME) systems comprising adding polyacrylate resin base, C3 and C4 alcohols, and n-butyl acetate and negating the need for teflon dispersions, dibutyl phthalate, and improves the dye penetration, hastens the flash times, improve the dust free time, and improves the tape time.

Synthetic leather comprising cross-linked foamed syndiotactic 1,2-polybutadiene as a main ingredient.

Leather is rendered flexible and water repellent by treatment with a low molecular weight, generally monomeric, amphoteric surfactant having at least one surfactant hydrophobe, at least two cationic groups and at least two anionic groups which are carboxylic groups.