The present invention provides a urethane resin composition including an anionic urethane resin (X) and water (Y). The anionic urethane resin (X) is produced using, as essential raw materials: a polyol (a) including a polycarbonate polyol (a1) produced using biomass-derived decanediol as a raw material; and a polyisocyanate (b) including an aliphatic polyisocyanate (b1) and an alicyclic polyisocyanate (b2). Furthermore, the present invention provides a dry coating formed from the urethane resin composition, and provides a synthetic leather including the coating as a skin layer. The polycarbonate polyol (a1) is preferably produced further using butanediol as a raw material. The molar ratio [(b1)/(b2)] of the aliphatic polyisocyanate (b1) to the alicyclic polyisocyanate (b2) is preferably within a range of 10/90 to 90/10.

An isocyanate-functional prepolymer comprises the reaction product of: (A) a polyol; (B) an organopolysiloxane having at least two carbinol-functional groups per molecule; and (C) a polyisocyanate. Components (A) to (C) are utilized to provide a stoichiometric excess of isocyanate-functional groups in component (C) over the total amount of isocyanate-reactive groups of components (A) and (B). An isocyanate component comprising the isocyanate-functional prepolymer is also disclosed. The isocyanate component also comprises (E) a filler. In addition, a composition is disclosed, which comprises the isocyanate component and an isocyanate-reactive component. Further, a method of preparing a coating with the composition is disclosed, which method comprises applying the composition on a substrate and forming the coating from the composition on the substrate. A coated substrate comprising the substrate and a coating disposed on the substrate, the coating being formed from the composition, is additionally disclosed.

Disclosed are a soft solvent-free flame-retardant polyurethane synthetic leather and a preparation method therefor. The soft solvent-free flame-retardant polyurethane synthetic leather comprises an antifouling layer, a surface layer, an intermediate layer, a bonding layer and a base cloth in sequence from top to bottom, wherein the bonding layer is prepared from component A and an isocyanate; the molar ratio of —NCO in the isocyanate to —OH in the component A is 0.85-0.93; and the component A is composed of a polyhydric alcohol, an inhibition-type catalyst, a flame retardant, a filler and a viscosity modifier in parts by weight.

Provided is a synthetic leather including a fibrous substrate, a porous resin layer provided on the fibrous substrate, and a non-porous resin layer provided on the porous resin layer. The synthetic leather has a thickness of 800 μm or more, and a vertical cross-section of the porous resin layer has a pore area ratio of 25% or more.

A non-solvent two-component polyurethane artificial leather composition is provided. The polyurethane composition comprises (A) a polyurethane-prepolymer component, comprising one or more polyurethane-prepolymers prepared by reacting at least one polyisocyanate compound with at least one first polyol, wherein the polyurethane-prepolymer comprises at least two free isocyanate groups; and (B) a polyol component, comprising at least one second polyol; wherein the polyol component further comprises an encapsulated foaming agent comprising at least one foaming core phase encapsulated within an outer shell. The polyurethane leather product derived from the polyurethane composition exhibits enhanced stability, mild bubble generation and improved cost effectiveness. A polyurethane leather product prepared with said composition and the method for preparing the same are also provided.

A waterborne polyurethane dispersion is provided. The waterborne polyurethane dispersion comprises residual moiety of a hydroxy-terminated siloxane compound in the main chain and exhibits good anti-stickiness while retaining superior mechanical properties. A laminated synthetic leather article prepared with said waterborne polyurethane dispersion as well the method for preparing the synthetic leather article are also provided.

Disclosed is a napped artificial leather including: a fiber-entangled body including ultrafine fibers having a fineness of 0.5 dtex or less; and an elastic polymer impregnated into the fiber-entangled body, the napped artificial leather having a thickness of 0.25 to 1.5 mm, and including a main surface that is a napped surface formed by napping the ultrafine fibers. The napped artificial leather further includes phosphorous-based flame retard ant particles attached to the elastic polymer such as a polyurethane, the phosphorous-based flame retardant particles being locally present in a range of a thickness of 200 pm or less from a back surface opposite to the main surface. The phosphorous-based flame retardant particles have an average particle size of 0.1 to 30 μm, a phosphorus atom content of 14 mass % or more, and a solubility in water at 30° C. of 0.2 mass % or less, and a melting point, or, in the absence of a melting point, a decomposition temperature, of 150° C. or more, and a content ratio of the phosphorous-based flame retardant particles is 1 to 6 mass % as a content ratio in terms of phosphorus atoms.

A polyurethane prepolymer produced by reacting a polyol and a polyisocyanate, wherein the polyol contains a polyether polyol (A) in an amount of 30% by mass or more, a polyester polyol (B) containing an isophthalic acid-derived structure and a sebacic acid-derived structure as partial structures derived from a dibasic acid in an amount of 30% by mass or more, and a polyester polyol (C) containing only a sebacic acid-derived structure as a partial structure derived from a dibasic acid in an amount of 20% by mass or less, the number-average molecular weight of the polyether polyol (A) is 1100 to 2400, and the ratio of the isocyanate equivalent of the polyisocyanate to the hydroxyl equivalent of the polyol is 2.1 or less.

The present invention provides a synthetic leather including at least a base (i), an adhesive layer (ii), and a skin layer (iii). The adhesive layer (ii) is formed of a urethane resin composition including a urethane resin (A) produced using an aromatic polyisocyanate (a1) as a raw material and water (B). The skin layer (iii) is formed of a urethane resin composition including an anionic urethane resin (X) having an anionic group concentration of 0.15 mmol/g or less and water (Y). The aromatic polyisocyanate (a1) preferably includes toluene diisocyanate. The urethane resin (A) has an aromatic ring concentration of 0.1 to 2.5 mol/kg.

The present invention provides a synthetic leather including at least a base (i), an adhesive layer (ii), and a skin layer (iii). The adhesive layer (ii) and the skin layer (iii) are both formed of a urethane resin composition including a urethane resin and water, the urethane resin being produced using an aromatic polyisocyanate as a raw material. The urethane resin composition forming the adhesive layer (ii) preferably includes a urethane resin (A) and water (B), the urethane resin (A) being produced using an aromatic polyisocyanate (a1) as a raw material. The aromatic polyisocyanate (a1) preferably includes toluene diisocyanate. It is preferable that the urethane resin (A) include an anionic group and the concentration of the anionic group in the urethane resin (A) be 0.35 mmol/g or less.