Abstract: A process for producing an artificial leather having excellent touch, appearance and full-hand similar to that of natural leather and having further excellent softness and surface strength, which comprises coating a composition comprising an urethane prepolymer, a combination of catalysts and a foam stabilizer and including a plurality of extremely fine cells (foams) of an inert gas, onto a release paper or a layer of a surface treating agent coated on a release paper in a specified thickness; subjecting the resultant to a steam treatment under a specified atmosphere; laminating a base sheet onto the coating layer under pressure; subjecting the laminated product to a heat treatment at a specified temperature, and then peeling off the release paper, and optionally further treating the product with a surface treating agent.

Abstract: A process for the production of artificial leathers having excellent air permeability and resembling a natural leather is provided, which comprises incorporating a catalyst, a foam stabilizer and, optionally, a pigment and other additive into an isocyanate-terminated polyurethane prepolymer formed by compounding a polyester diol derived from an aliphatic dicarboxylic acid with an organic polyisocyanate so that the [NCO]/[OH] ratio is within a range of from 2.0 to 4.0, to thereby form a substantially solvent-free paint having a viscosity adjusted to 70 to 1000 poises, coating the paint on a release paper in an amount of 50 to 400 g/m.sup.2, applying the release paper to a substrate, allowing foaming and polymerization reactions to proceed in an atmosphere of a dry-bulb temperature of 40.degree. to 95.degree.C.