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Urethane resin composition, film and synthetic leather

A urethane and resin composition technology, applied in physical treatment, coating, fiber treatment, etc., can solve the problems of no discovery, hydrolysis resistance and other physical properties inferior to solvent systems, etc., to achieve improved hydrolysis resistance, high resistance to Improved abrasion resistance and excellent hydrolysis resistance

Pending Publication Date: 2021-07-23
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although such substitution research is ongoing, it is pointed out that the current product is inferior to the solvent system in terms of physical properties such as hydrolysis resistance.
[0004] In addition, in the fields of sports shoes, functional shoes, and moisture-permeable clothing, there is also a tendency to remove DMF, but in addition to the above-mentioned physical properties, excellent moisture-permeability is required, and in fact, no material that satisfies all of these at a high level has been found. performance water-based material

Method used

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  • Urethane resin composition, film and synthetic leather
  • Urethane resin composition, film and synthetic leather
  • Urethane resin composition, film and synthetic leather

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074]100 parts by mass of polytetramethylene glycol (number average molecular weight: 2000, hereinafter abbreviated as "PTMG") was placed in a 4-neck flask equipped with a stirrer, a reflux cooling tube, a thermometer and a nitrogen gas introduction tube under a nitrogen gas flow. , a random copolymer of ethylene oxide and propylene oxide (a substance using ethylene glycol as an initiator, the structure represented by formula (1) (hereinafter, referred to as "EO".) and the following formula (2) The molar ratio of the structure shown (hereinafter, abbreviated as "PO".) (hereinafter the same.) [EO / PO] = 50 / 50, number average molecular weight: 1750, hereinafter abbreviated as "EOPO (1)") 35 parts by mass , 3 parts by mass of 2,2-dimethylolpropionic acid (hereinafter referred to as "DMPA".), and 121 parts by mass of methyl ethyl ketone (hereinafter referred to as "MEK"). 36 parts by mass of cyclohexylmethane diisocyanate (hereinafter, abbreviated as "HMDI"), then, 0.1 part by mas...

Embodiment 2

[0080] In a 4-neck flask equipped with a stirrer, a reflux cooling tube, a thermometer, and a nitrogen introduction tube, 100 parts by mass of PTMG, polycarbonate diol (a substance using 1,6-hexanediol as a base material, Number average molecular weight: 2000, hereinafter referred to as "PC") 30 parts by mass, a random copolymer of ethylene oxide and propylene oxide (with ethylene glycol as an initiator, [EO / PO]=75 / 25 , number-average molecular weight: 1400, hereinafter referred to as "EOPO (2)".) 40 parts by mass, 3 parts by mass of DMPA, 149 parts by mass of MEK, after mixing uniformly, 46 parts by mass of HMDI was added, and then, dilauric acid was added 0.1 mass part of butyltin was reacted at 70 degreeC for about 4 hours, and the methyl ethyl ketone solution of the urethane prepolymer which has an isocyanate group was obtained.

[0081] Next, 2.3 parts by mass of triethylamine was added to neutralize the carboxyl groups in the urethane polymer, 522 parts by mass of ion-ex...

Embodiment 3

[0084] In a 4-necked flask equipped with a stirrer, a reflux cooling tube, a thermometer and a nitrogen introduction tube, 100 parts by mass of PTMG, a random copolymer of ethylene oxide and oxolane (with tetrahydrofuran as an initiator) were added under nitrogen flow. The substance of the agent, the molar ratio of EO to the structure represented by the following formula (3) (hereinafter referred to as “TMO”.) [EO / TMO]=50 / 50, number average molecular weight: 1800, hereinafter referred to as “EOTMO ( 1)".) 80 parts by mass, 4 parts by mass of DMPA, 159 parts by mass of MEK, after mixing uniformly, 34 parts by mass of HMDI, 9.4 parts by mass of hexamethylene diisocyanate (hereinafter referred to as "HDI".) were added, and then Next, 0.1 part by mass of dibutyltin dilaurate was added, and the reaction was performed at 70° C. for about 4 hours, thereby obtaining a methyl ethyl ketone solution of a urethane prepolymer having an isocyanate group.

[0085] Next, after adding 3 mass p...

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Abstract

The present invention provides a urethane resin composition which contains a urethane resin (X) having an anionic group and water (Y), and which is characterized in that the urethane resin (X) has an anionic group concentration of 0.2 mmol / g or less and a concentration of the structure represented by formula (1) of 1-6 mmol / g. The present invention also provides: a film which is characterized by being formed from the above-described urethane resin composition; and a synthetic leather which is characterized by having the above-described film as a surface layer. The structure represented by formula (1) of the urethane resin (A) is preferably supplied from a polyoxyethylene polyoxypropylene glycol (a1-1) and / or a polyoxyethylene polyoxytetramethylene glycol (a1-2).

Description

technical field [0001] The present invention relates to a urethane resin composition, a coating, and a synthetic leather. Background technique [0002] Polyurethane resin is widely used in the manufacture of synthetic leather (including artificial leather) due to its mechanical strength and good texture. For this use, solvent-based urethane resins containing N,N-dimethylformamide (DMF) are currently the mainstream. However, against the background of DMF regulations in Europe, the strengthening of VOC emission regulations in China and Taiwan, and the DMF regulations of major apparel manufacturers, there is a demand for the removal of DMF from urethane resins that make up synthetic leather. [0003] In order to cope with such a change of the times, the urethane resin composition which disperse|distributed a urethane resin in water etc. is widely researched (for example, refer patent document 1.). However, although such replacement studies are being conducted, it is pointed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14C08L75/04C08L83/04C08G18/00C08G18/48C08G18/75
CPCC08G18/0823C08G18/12C08G18/348C08G18/6692C08G18/324C08G18/755C08G18/44C08G18/4854C08G18/73C08G77/04D06N3/146D06N2209/123D06N2209/143D06N3/0004D06N3/0095D06N3/148D06N2203/066D06M10/06
Inventor 前田亮
Owner DIC CORP
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