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Process for producing porous object, and porous object, layered product, and leather-like sheet each obtained thereby

A manufacturing method, a technology for porous bodies, with applications in chemical instruments and methods, layered products, textiles, and papermaking

Active Publication Date: 2013-04-10
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The problem to be solved by the present invention is to provide a method for producing a porous body, which does not use amide-based solvents such as dimethylformamide, which may have adverse effects on the environment, and does not generate aggregates, etc., by a wet method. To produce a porous body with very excellent moisture permeability

Method used

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  • Process for producing porous object, and porous object, layered product, and leather-like sheet each obtained thereby
  • Process for producing porous object, and porous object, layered product, and leather-like sheet each obtained thereby
  • Process for producing porous object, and porous object, layered product, and leather-like sheet each obtained thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] (Preparation of Polyurethane Resin Composition (I))

[0126] In a reaction device with a stirrer and a thermometer, 103 parts by mass of polyoxytetramethylene glycol (weight molecular weight 1800), 70 parts by mass of polybutylene adipate (weight molecular weight 2000), 3 parts by mass of polyethylene Diol (weight-average molecular weight 1540) and 103 parts by mass of 4,4'-diphenylmethane diisocyanate were reacted at 60°C for 2 hours under stirring in 128 parts by mass of methyl ethyl ketone, thereby obtaining A mixture of polyurethane (A'-1) having isocyanate groups and methyl ethyl ketone.

[0127] Next, 126 parts by mass of methyl ethyl ketone and 21 parts by mass of ethylene glycol as a chain extender were added to the aforementioned mixture under stirring, and reacted at 60° C. for 4 hours. After adding the above-mentioned ethylene glycol, as the viscosity of the mixture rises, 416 parts by mass of methyl ethyl ketone is continuously supplied to continue the reac...

Embodiment 2

[0132] (Preparation of Polyurethane Resin Composition (II))

[0133] In a reaction device with a stirrer and a thermometer, 103 parts by mass of polyoxytetramethylene glycol (weight molecular weight 1800), 70 parts by mass of polybutylene adipate (weight molecular weight 2000), 3 parts by mass of polyethylene Diol (weight-average molecular weight 1540) and 103 parts by mass of 4,4'-diphenylmethane diisocyanate were reacted at 60° C. for 2 hours under stirring in 128 parts by mass of acetone to obtain a compound having an isocyanate group at the molecular end. Mixture of polyurethane (A'-2) and acetone.

[0134] Next, 126 parts by mass of acetone and 21 parts by mass of ethylene glycol as a chain extender were added to the aforementioned mixture under stirring, and reacted at 60° C. for 4 hours. After adding the above-mentioned ethylene glycol, as the viscosity of the mixture rises, 416 parts by mass of acetone are continuously supplied, and the reaction is continued while adj...

Embodiment 3

[0138] (Preparation of Polyurethane Resin Composition (III))

[0139] In the reaction device with stirrer, thermometer, make 103 mass parts polyoxytetramethylene glycol (weight molecular weight 1800), 70 mass parts polybutylene adipate (weight molecular weight 2000), 3 mass parts in unit Polyvinyl alcohol having one terminal hydroxyl group (M-2000, manufactured by NOF Corporation, weight average molecular weight 2000) and 103 parts by mass of 4,4'-diphenylmethane diisocyanate in 128 parts by mass of methyl ethyl ketone , reacted at 60° C. for 2 hours under stirring, thereby obtaining a mixture of polyurethane (A′-3) having an isocyanate group at a molecular terminal and methyl ethyl ketone.

[0140] Next, 126 parts by mass of methyl ethyl ketone and 21 parts by mass of ethylene glycol as a chain extender were added to the aforementioned mixture under stirring, and reacted at 60° C. for 4 hours. After adding the above-mentioned ethylene glycol, as the viscosity of the mixture ...

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Abstract

The present invention relates to a method for producing a porous material, the method including coating or impregnating a surface of a base material with a urethane resin composition containing a urethane resin (A) including a polyoxyethylene moiety and an organic solvent (B) that is one or more selected from the group consisting of a ketone solvent and an ester solvent, and subsequently bringing the coated surface or the impregnated surface into contact with water or water vapor to wet-cure the urethane resin (A); a porous material produced by the production method; a laminate; and a leather-like sheet.

Description

technical field [0001] The present invention relates to a method for producing a porous body that can be used in various fields including leather-like sheets such as synthetic leather and artificial leather, and moisture-permeable waterproof materials. Background technique [0002] Urethane resin compositions have been used in various applications such as adhesives, coating agents, and molding materials because they can form cured products with excellent flexibility and strength. Among them, the polyurethane resin composition is suitable for the production of porous bodies used in clothing such as the middle layer and the skin layer of leather-like sheets, moisture-permeable waterproof materials, etc., taking advantage of its good soft feel. [0003] Conventionally, a dry method and a wet method are known as methods for producing a porous body using the aforementioned polyurethane resin composition. [0004] As a method of forming a porous body by the aforementioned dry met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28B32B5/18B32B27/40C08G18/48
CPCC08G18/4854D06N3/14C08G18/4238B32B27/40C08G18/4018B32B5/18C08G18/4833C08G18/12C08G18/3206C08J9/0023C08J9/28C08J2375/08C08K5/07C08K5/101
Inventor 岩尾武志后藤直孝
Owner DIC CORP