Process for producing alcohol soluble urethane resin composition, polyurethane porous body, and moisture permeable film

A technology of polyurethane resin and manufacturing method, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of complicated operation, easy incomplete porous layer, difficult to obtain thin film, etc., and achieve chemical resistance and storage stability. excellent effect

Active Publication Date: 2011-01-12
DIC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the polyurethane-based resin composition described in Patent Document 3 has the following problems: (1) Since two or more types of solvents are used in combination during manufacture, the process of solvent recovery and reuse is complicated, and the operation becomes complicated; (2) Due to the large amount of water-insoluble organic solvents such as toluene and MEK other than alcohol, the formation of a porous layer by wet film formation is likely to be incomplete, and it is difficult to obtain a good film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0202] The first process, in the reaction device that has stirrer, thermometer and nitrogen inlet pipe, add 280g isophorone diisocyanate (IPDI), 1000g polyoxypropylene glycol (molecular weight 2000 material), make it in solvent-free, nitrogen flow, React under stirring at 100°C for 6 hours to synthesize urethane prepolymer (x).

[0203] Next, in the second step, in a mixture consisting of 20 g of isophoronediamine, 1.57 g of γ-aminopropyltriethoxysilane, and 557 g of isopropyl alcohol (IPA) as the alcohol (B), add while stirring 217 g of the aforementioned urethane prepolymer (x) was reacted at 50°C for 3 hours to obtain the alcohol-soluble polyurethane resin composition of the present invention containing the polyurethane resin (A) (Mn180000).

[0204] The aforementioned alcohol-soluble polyurethane resin composition is a transparent solution with a solid content of 30% by mass, an initial solution viscosity of 6000 mPa·s (measurement temperature: 25° C.), and a solution visc...

Embodiment 2

[0207] The first step is to add 280g of IPDI and 1000g of polyoxypropylene glycol (a substance with a molecular weight of 2000) to a reaction device with a stirrer, a thermometer and a nitrogen inlet pipe, and allow it to react for 6 hours under a solvent-free, nitrogen flow, and stirring at 100°C to synthesize Urethane prepolymer (x).

[0208] Then, the second process, by 20.80g isophorone diamine, 0.85gN-beta (aminoethyl) gamma-aminopropyl trimethoxysilane, 0.99g two (n-butyl) amine, 559g as alcohol ( B) To the mixture composed of isopropyl alcohol (IPA), 217 g of the aforementioned urethane prepolymer (x) was added while stirring, and allowed to react at 50° C. for 3 hours to obtain a polyurethane resin (A) (Mn170000) containing The alcohol-soluble polyurethane resin composition of the present invention is formed.

[0209] The aforementioned alcohol-soluble polyurethane resin composition is a transparent solution with a solid content of 30% by mass, an initial solution vis...

Embodiment 3

[0212] The first step is to add 280g of IPDI and 1000g of polyoxypropylene glycol (a substance with a molecular weight of 2000) to a reaction device with a stirrer, a thermometer and a nitrogen inlet pipe, and allow it to react for 6 hours under a solvent-free, nitrogen flow, and stirring at 100°C to synthesize Urethane prepolymer (x).

[0213] Next, in the second step, 217 g of isophorone diamine, 1.02 g of di(n-butyl)amine, and 564 g of isopropyl alcohol (IPA) as the alcohol (B) were added while stirring. The aforementioned urethane prepolymer (x) and 1.95 g of γ-isocyanate propyltriethoxysilane were reacted at 50° C. for 3 hours to obtain the alcohol compound of the present invention containing polyurethane resin (A) (Mn150000). Dissolvable polyurethane resin composition.

[0214]The aforementioned alcohol-soluble polyurethane resin composition is a transparent solution with a solid content of 30% by mass, an initial solution viscosity of 3500 mPa·s (measurement temperatur...

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Abstract

Disclosed is a process for producing an alcohol soluble urethane resin composition. The alcohol soluble urethane resin composition can be highly stably stored in alcohol. In use of the alcohol soluble urethane resin composition, water and a catalyst are added to the system, the mixture is coated, and the coating is dried at room temperature or by heating to allow a crosslinking reaction to proceed to form a film. Thus, for example, when use of the alcohol soluble urethane resin composition in synthetic leathers or artificial leathers, polyurethane porous bodies, moisture permeable films and the like is contemplated, excellent properties required in these applications, for example, excellent solvent resistance (for example, alcohol resistance), chemical resistance (for example, DMF resistance), heat resistance, and elongation can be provided. Also disclosed is a polyurethane porous body or a moisture permeable film using the urethane resin composition obtained by the production process.

Description

technical field [0001] The present invention relates to a method for producing an alcohol-soluble polyurethane resin composition, a polyurethane porous body using the alcohol-soluble polyurethane resin composition, and a porous polyurethane body using the alcohol-soluble polyurethane resin composition for a moisture-permeable film. wet film. Background technique [0002] Conventionally, polyurethane resin compositions have been used in various applications such as artificial leather, synthetic leather, films, coating agents, and adhesives. In particular, organic solvent-based polyurethane resin compositions are mainly used in artificial leather, synthetic leather, and films. As organic solvents, for example, dimethylformamide (DMF), methyl ethyl ketone (MEK), toluene, and alcohols can be used alone or in combination. Wait. [0003] However, the actual situation is that due to concerns about the serious impact on living organisms and the environment caused by the use of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08G18/83C08J5/18
CPCC08G18/12C09D175/04C08G18/4018C08G18/4833C08G18/755C08J2375/04C08G18/73C08J5/18C08J9/142C08G18/758C08G18/0852C08G18/10C08G18/4009C08G18/289C08G18/3893C08G18/3234C08G18/718
Inventor 后藤直孝前田亮
Owner DIC CORPORATION
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