Urethane resin composition, adhesive, and synthetic leather

Patent metadata

Field	Value
Publication number	US-12486439-B2
Application number	US-202017773017-A
Country	US
Kind code	B2
Filing date	Sep 17, 2020
Priority date	Oct 28, 2019
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

A urethane resin composition including water, the urethane resin composition being produced using a biomass raw material and having high oleic-acid resistance, excellent low-temperature flexibility, and high peel strength. A urethane resin composition including an anionic urethane resin (X) and water (Y), in which the anionic urethane resin (X) is produced using a polyol (a) including a biomass-derived polycarbonate polyol (a1), a polyisocyanate (b), and an alkanolamine (c), as essential raw materials. Furthermore, An adhesive including the urethane resin composition and a synthetic leather having an adhesive layer formed from the adhesive.

First claim

The invention claimed is:

1 . A urethane resin composition comprising:
an anionic urethane resin (X); and water (Y), the anionic urethane resin (X) being produced using, a polyol (a) including a biomass-derived polycarbonate polyol (a1); a polyisocyanate (b);an alkanolamine (c); and a chain extender (e), wherein the chain extender (e) comprises a chain extender (e1) having two or more amino groups, an amount of the chain extender (e) is within a range of 0.001% to 0.1% by mass, based on a total mass of raw materials constituting the anionic urethane resin (X), wherein the biomass-derived polycarbonate polyol (a1) is produced using 1,4-butanediol and a biomass-derived decanediol as raw materials, and a molar ratio of 1,4-butanediol to the biomass-derived decanediol is within a range of 5/95 to 95/5, and wherein a molar equivalent ratio (c)/(e1) of the alkanolamine (c) to the chain extender (e1) is within a range of 80/20 to 97/3.

2 . The urethane resin composition according to claim 1 , wherein a number average molecular weight of the biomass-derived polycarbonate polyol (a1) is within a range of 1,500 to 2,500.

3 . The urethane resin composition according to claim 1 , wherein a weight-average molecular weight of the anionic urethane resin (X) is within a range of 10,000 to 70,000.

4 . An adhesive comprising the urethane resin composition according to claim 1 .

5 . A synthetic leather comprising at least:
a base fabric (i); and an adhesive layer (ii) formed from the adhesive according to claim 4 .

Assignees

• Dainippon Ink & Chemicals

Inventors

• Tseng Yayi
• Maeda Ryo

Classifications

• C08G18/755

  and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate · CPC title

• C08G18/6655

  with compounds of group C08G18/3271 · CPC title

• C08G18/44 Primary

  Polycarbonates · CPC title

• C08G18/3271

  Hydroxyamines · CPC title

• C08G18/227

  of antimony, bismuth or arsenic · CPC title