URETHANE RESIN COMPOSITION, LEATHER-LIKE SHEET, AND METHOD FOR MANUFACTURING LEATHER-LIKE SHEET

WIPO Patent Application WO/2015/033732

A1

The present invention addresses the problem of providing an aqueous urethane resin composition which can be solidified in a heat-sensitive manner in such a state that a fibrous base material is impregnated with the aqueous urethane resin composition, cannot be detached from the fibrous base material due to the effect of water or heat during the dying of the impregnated base material, rarely undergoes the discoloration over time, and enables the production of a coating film having an excellent flexible and resilient texture. The present invention provides an aqueous urethane resin composition characterized by comprising a urethane resin (A), a nonionic emulsifying agent (B) and an aqueous medium (C), wherein the urethane resin (A) is produced by reacting a polyol (a1) that contains a polyol (a1-1) having a carboxyl group, an aromatic polyisocyanate (a2) and a chain extender (a3) with one another, and the urethane resin (A) has a urea bond content of 0.3 mol/kg or less. The present invention also provides a leather-like sheet characterized by being produced by impregnating a fibrous base material with the aqueous urethane resin composition and then solidifying the resultant product in a heat-sensitive manner.

TETSUI TOMOHIRO (JP)

PCT/JP2014/070844

March 12, 2015

August 07, 2014

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DAINIPPON INK & CHEMICALS (JP)

C08L75/04; C08G18/65; C08K5/06; D06N3/14

JPH1025664A	1998-01-27
JPH08246355A	1996-09-24
JPH1112458A	1999-01-19
JP2004043519A	2004-02-12
JP2000290879A	2000-10-17
JP2000096457A	2000-04-04
JP2006096852A	2006-04-13
JP2003336178A	2003-11-28
JPH11335975A	1999-12-07

See also references of EP 3029110A4

KONO MICHIHIRO (JP)
Michihiro Kono (JP)

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