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US Patent 7122596 Artificial leather and method of producing the same

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Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7122596
Date of Patent
October 17, 2006
Patent Application Number
10633571
Date Filed
August 5, 2003
Patent Primary Examiner
‌
Patrick D. Niland
Patent abstract

Provided are a leather-like sheet fabricated by infiltrating an aqueous resin dispersion (A) into a fibrous substrate, which satisfies a requirement (I) that the aqueous resin dispersion, (A) comprises essentially a main resin (a) stabilized with a surfactant, a polymer (b) having a polyoxyethylene group in its side chains, and a surfactant (c), a requirement (II) that the main resin (a) comprises an urethane resin (a1) and/or an urethane-acrylic composite resin (a2), and the resin skeleton contains from 1 to 10 mmols of a carboxyl group per 100 g of the resin, a requirement (III) that the polymer (b) is obtained through polymerization of a polyoxyethylene group-having ethylenic unsaturated monomer (b1) and any other ethylenic unsaturated monomer (b2) in a ratio by mass (b1)/(b2)=60/40 to 100/0, and a requirement (IV) that the percentage, % by mass (α) of the polyoxyethylene group in the polymer (b) and the number of mols (β) of the amino group per gram of the polymer (b) satisfy 35≦α+β×20000≦60; and an industrial advantageous method for producing the sheet. The leather-like sheet has a good feel and good physical properties.

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