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Urethane resin composition, foamed urethane sheet, and synthetic leather

A technology of urethane and resin composition, applied in the direction of coating, textile and paper making, can solve the problems of difficult to control the size of the bubble, difficult to satisfy, poor feel of the foam, and achieve excellent low-temperature flexibility, oleic acid resistance, etc. excellent effect

Pending Publication Date: 2021-12-07
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method of compounding microcapsules, the texture of the obtained foam becomes poor, or poor smoothness due to expansion of microcapsules becomes a problem.
In addition, in the method of dispersing the gas, the bubbles mixed in the compounding liquid disappear during the production of the foam, so it is difficult to control the size of the bubbles, etc., and it is difficult to stably obtain a foam with a good texture.
[0004] In addition to texture, in recent years there has been a high demand for resistance to oleic acid contained in human sebum and low-temperature flexibility for practical use at low temperatures, and it is difficult to satisfy these required properties in a trade-off relationship.

Method used

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  • Urethane resin composition, foamed urethane sheet, and synthetic leather
  • Urethane resin composition, foamed urethane sheet, and synthetic leather

Examples

Experimental program
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Effect test

Embodiment

[0082] Hereinafter, the present invention will be described in more detail using examples.

Synthetic example 1

[0083] [Synthesis Example 1] Preparation of Urethane Resin (A-1) Composition

[0084] In the presence of 3,281 parts by mass of methyl ethyl ketone and 0.1 part by mass of stannous octoate, 1,000 parts by mass of polycarbonate polyol (1,6-hexanediol as raw material, number average molecular weight: 2,000), 2,2-dihydroxy 17 parts by mass of methacrylic acid, 47 parts by mass of ethylene glycol, and 344 parts by mass of diphenylmethane diisocyanate were reacted at 70°C until the solution viscosity reached 20,000mPa·s, and then 3 parts by mass of methanol was added to stop the reaction to obtain amino Solution of formate resin in methyl ethyl ketone. After mixing 70 parts by mass of polyoxyethylene distyrenated phenyl ether (Hydrophile-Lipophile Balance (hereinafter, abbreviated as "HLB" hereinafter); 14) and 13 parts by mass of triethylamine in this urethane resin solution, By adding 800 parts by mass of ion-exchanged water and performing phase inversion emulsification, an emul...

Synthetic example 2

[0086] [Synthesis Example 2] Preparation of Urethane Resin (A-2) Composition

[0087] In the presence of 3,281 parts by mass of methyl ethyl ketone and 0.1 part by mass of stannous octoate, 1,000 parts by mass of polyoxytetramethylene glycol (number average molecular weight: 2,000), 17 parts by mass of 2,2-dimethylolpropionic acid, 47 parts by mass of ethylene glycol and 344 parts by mass of MDI were reacted at 70° C. until the solution viscosity reached 20,000 mPa·s, and then 3 parts by mass of methanol was added to stop the reaction to obtain a methyl ethyl ketone solution of a urethane resin. After mixing 70 parts by mass of polyoxyethylene distyrenated phenyl ether (HLB: 14) and 13 parts by mass of triethylamine in the urethane resin solution, 800 parts by mass of ion-exchanged water was added for phase inversion emulsification. This gives an emulsion in which the above-mentioned urethane resin (A-2) is dispersed in water.

[0088] Next, methyl ethyl ketone was distilled ...

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Abstract

The present invention provides a urethane resin composition which contains a urethane resin (A), water (B) and a surfactant (C) that has no aromatic ring and has a hydrophobic moiety having 10 or more carbon atoms, the composition being characterized in that the urethane resin composition has a carbonate structure (X) and an oxyalkylene structure (Y) that are derived from the urethane resin (A). In addition, the present invention also provides a foamed urethane sheet which is characterized by being formed from the urethane resin composition and by having a density of 200-1000 kg / m3. The urethane resin composition set forth in claim 1, wherein the mass ratio [X / Y] of the carbonate structure (X) and the oxyalkylene structure (Y) falls within the range 10 / 90-90 / 10.

Description

technical field [0001] The present invention relates to a urethane resin composition, a foamed urethane sheet, and synthetic leather. Background technique [0002] Urethane resins have been used in various applications such as coating agents and adhesives because of their excellent mechanical strength and flexibility. Among them, solvent-based urethane resins containing dimethylformamide (DMF) have been widely used until now, but the laws and regulations of DMF are becoming stricter every year, and the development of environmentally friendly products such as weak-solvent, water-based, and solvent-free become a priority. [0003] Among them, research on water-based urethane (PUD) obtained by dispersing a urethane resin in water is most active. When the water-based urethane is used in various applications, it is often required to mold it into a foam for the purpose of improving texture and the like. As a method of forming a foam from water-based urethane, for example, mixin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/14C08G101/00C08K5/09C08L75/08C08G18/00C08G18/08C08G18/44C08G18/48
CPCC08G18/44C08L75/08C08G2101/00C08G2110/0066C08G18/0823C08G18/348C08G18/6659C08G18/7671C08G18/244C08G18/3206C08G18/664C08G18/0866C08G18/4854C08G18/6692C08G18/6674C08G18/4018C08L75/06C08G2110/0008C08G2150/60D06N3/0011D06N3/146D06N3/0045D06N3/0095D06N2209/143C08L71/02C08K5/17D06N3/14C08G18/08C08G18/48C08K5/09C08G18/7692C08J9/30C08J2201/026C08J2375/08C08J2475/08
Inventor 藤下章惠前田亮
Owner DIC CORP