Disclosed is a multi-layer synthetic leather product comprising (A) a silicone based top layer; and (B) a polyurethane based skin layer which is formed with a polyurethane dispersion formulation, wherein the polyurethane dispersion formulation is formed by blending water, at least one chain extender and an isocyanate-terminated prepolymer which is the reaction product of a mixture comprising: at least one isocyanate compound, at least one polyol compound, and from 2.5 wt % to 15 wt %, based on the weight of the prepolymer, of at least one allyl polyether monoalcohol. Due to the formation of chemical bonds between the top layer and the skin layer, the synthetic leather product exhibits superior detachment resistance, mechanical strength, easy to clean capability and hand feeling.

A task to be achieved by the present invention is to provide a urethane water dispersion which is unlikely to soak the substrate well, and which has excellent peel strength and excellent prompt releasability. The present invention provides a urethane resin water dispersion containing a urethane resin (A), water (B), and a crosslinking agent (C), wherein the urethane resin (A) has a viscosity at 50 C. in the range of from 15,000 to 34,000 mPa.Math.s, a viscosity at 100 C. in the range of from 1,000 to 10,000 mPa.Math.s, and a viscosity at 150 C. in the range of from 100 to 1,300 mPa.Math.s. Further, the present invention provides a synthetic leather having a bonding layer formed from the urethane resin water dispersion. Further, the present invention provides a method for producing the synthetic leather.