AQUEOUS POLYURETHANE RESIN, SURFACE TREATMENT AGENT, AND LEATHER SUBJECTED TO SURFACE TREATMENT EMPLOYING SAME

WIPO Patent Application WO/2022/137906

A1

Provided is an aqueous polyurethane resin that is a chain-elongation product of (e) a polyamine that has two or more amino groups and/or imino groups, the polyamine being a neutralization product of an isocyanate group-terminated prepolymer, which is a reaction product of (a) an organic polyisocyanate, (b) a polyol, (c) a compound having an anionic hydrophilic group and at least two active hydrogens, and (d) a multivalent alcohol, wherein (b) the polyol contains at least one substance selected from the group consisting of (b1) polycarbonate diols having a structural unit in which the number of carbon atoms is an integer of 3-10, that has a branched structure, and that is of a diol origin and (b2) polycarbonate diols having a structural unit in which the number of carbon atoms is an odd number of 3-9, that has a straight-chain structure, and that is of a diol origin, and (d) the multivalent alcohol includes a multivalent alcohol having three or more active hydrogens.

NANBOKU NAOKI (JP)
SAITO YUSUKE (JP)
KONDO KUNIAKI (JP)
NISHINO MASAKAZU (JP)

PCT/JP2021/042257

June 30, 2022

November 17, 2021

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NICCA CHEMICAL CO (JP)

D06N3/14; C08G18/00; C08G18/08; C08G18/12; C08G18/32; C08G18/34; C08G18/44; C08G18/65; C08G18/73; C08G18/75; C09D175/04

JP2010159367A	2010-07-22
JP2016069437A	2016-05-09
JP2007092195A	2007-04-12
JP2007119749A	2007-05-17
JP2020097707A	2020-06-25

CENTCREST IP ATTORNEYS (JP)

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