AQUEOUS POLYURETHANE RESIN DISPERSION AND METHOD FOR PRODUCING THE SAME

WIPO Patent Application WO/2010/007876

A1

Disclosed is an aqueous polyurethane resin dispersion which enables formation of a tough coating film. The aqueous polyurethane resin dispersion is obtained by dispersing an aqueous polyurethane resin, which is obtained by reacting a polyurethane prepolymer (A) with a chain extender (B) which is reactive with an isocyanate group of the polyurethane prepolymer (A), in an aqueous medium.  The polyurethane prepolymer (A) is obtained by reacting a polycarbonate polyol (a1) which has an average molecular weight of 400-5000 and 2.05-5 hydroxy groups per molecule on average, while containing no urethane bond, an acidic group-containing polyol compound (b) and a polyisocyanate (c), or alternatively by reacting a polycarbonate polyol (a2) which has an average molecular weight of 600-5000 and 2.05-5 hydroxy groups per molecule on average, while containing an acidic group but not containing a urethane bond, and a polyisocyanate (c).

NAKAMURA TAKU
NAIKI MASAHIRO
TAKAHASHI MANABU

PCT/JP2009/061892

January 21, 2010

June 30, 2009

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UBE INDUSTRIES (JP)
NAKAMURA TAKU
NAIKI MASAHIRO
TAKAHASHI MANABU

C08G18/66; C08L75/06

JPH03174429A	1991-07-29
JP2008534710A	2008-08-28
JP2005232447A	2005-09-02
JP2002179758A	2002-06-26
JP2001334615A	2001-12-04
JPH0741539A	1995-02-10
JPH0539340A	1993-02-19
JP4503226A
JPH0441517A	1992-02-12
JPH03128912A	1991-05-31
JP2002179787A	2002-06-26
JPH10273514A	1998-10-13
JPH059434A	1993-01-19
JP2000212240A	2000-08-02
JPH03220233A	1991-09-27
JPH02289616A	1990-11-29
JP2005060643A	2005-03-10
JPH10120757A	1998-05-12
JPH03174429A	1991-07-29
JPH08193181A	1996-07-30

See also references of EP 2301982A4

TSUKUNI, HAJIME (JP)
Hajime Tsukuni (JP)

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