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US 10,519,596 B2Granted
Method for producing leather-like sheet
AssigneeDIC Corporation
InventorTomohiro Tetsui
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AssigneeDIC Corporation
InventorTomohiro Tetsui
Estimating the term…
A problem to be solved by the invention is to provide a method for producing leather-like sheets with excellent chemical resistance and discoloration resistance utilizing an aqueous urethane resin composition. The invention provides a method for producing a leather-like sheet in the form of a laminate including a film, the method including forming the film by applying an aqueous urethane resin composition onto a substrate and drying the composition, the aqueous urethane resin composition including a urethane resin, a nonionic emulsifier and an aqueous medium, the urethane resin being one obtained by reacting a polyol including a carboxyl group-containing polyol, an aromatic polyisocyanate and a chain extender, the urethane resin having a urea bond content of not more than 0.3 mol/kg. The film is preferably used as a skin layer and/or a topcoat layer of the leather-like sheet.
A method for producing a leather-like sheet in the form of a laminate including a film, the method comprising forming the film by applying an aqueous urethane resin composition onto a substrate and drying the composition, the aqueous urethane resin composition including a urethane resin (A), a nonionic emulsifier (B) and an aqueous medium (C), the urethane resin (A) being a urethane resin obtained by reacting a polyol (a1) including a carboxyl group-containing polyol (a1-1), an aromatic polyisocyanate (a2) and a chain extender (a3), the urethane resin (A) having a urea bond content of not more than 0.3 mol/kg,
Dependencies are inferred from the claim text.