US 12,606,953 B2 · Urethane resin aqueous dispersion, synthetic leather, and method for producing synthetic leather

Abstract

A task to be achieved by the present invention is to provide a urethane water dispersion which is unlikely to soak the substrate well, and which has excellent peel strength and excellent prompt releasability. The present invention provides a urethane resin water dispersion containing a urethane resin (A), water (B), and a crosslinking agent (C), wherein the urethane resin (A) has a viscosity at 50° C. in the range of from 15,000 to 34,000 mPa·s, a viscosity at 100° C. in the range of from 1,000 to 10,000 mPa·s, and a viscosity at 150° C. in the range of from 100 to 1,300 mPa·s. Further, the present invention provides a synthetic leather having a bonding layer formed from the urethane resin water dispersion. Further, the present invention provides a method for producing the synthetic leather.

Claims6

Dependent claims

A urethane resin water dispersion containing a urethane resin (A), water (B), a crosslinking agent (C), and a nonionic emulsifying agent,

wherein the urethane resin (A) is obtained from reactants comprising a polytetramethylene glycol and/or polycarbonate polyol reactant, and a diphenylmethane diisocyanate reactant,
wherein the urethane resin (A) has a viscosity at 50° C. in the range of from 15,000 to 34,000 mPa·s, a viscosity at 100° C. in the range of from 1,000 to 10,000 mPa·s, and a viscosity at 150° C. in the range of from 100 to 1,300 mPa·s, and
wherein the viscosity is measured using a rheometer while heating from room temperature to 150° C. at a temperature change of 5° C./minute.

Dependencies are inferred from the claim text.

Facts

Application

17/787,414Filed 15 Oct 2020

Priority

JP 2019-23024420 Dec 2019

Published

US 2023/0026604 A126 Jan 2023

Granted

21 Apr 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

C08G 18/4854
Polyethers: polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
D06N 3/141
With polyurethanes: mixture of two or more polyurethanes in the same layer
C08G 18/0866
In the presence of a dispersing phase for the polymers or a phase dispersed in the polymers: the dispersing or dispersed phase being an aqueous medium
C08G 18/10
Processes: prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Urethane resin aqueous dispersion, synthetic leather, and method for producing synthetic leather

Life of this patent

Urethane resin aqueous dispersion, synthetic leather, and method for producing synthetic leather

Life of this patent

Abstract

Claims6