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Soft wet-method waterproof air-permeable water-permeable polyurethane resin and preparation method thereof

A polyurethane resin, waterproof and breathable technology, which is applied in the field of soft wet-process waterproof, breathable and moisture-permeable polyurethane resin and its preparation field, can solve the problem of high use cost, and achieve the effects of increasing compatibility, excellent peel strength, and improving waterproof and breathable performance.

Active Publication Date: 2014-11-19
江西巨联新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most of the polyurethane coatings commonly used in the domestic market are developed by foreign companies such as Toray in Japan, 3M in the United States, and Mitsubishi in Japan, and the cost of use is relatively high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 12g polyadipate-1,4-butylene glycol ester diol (molecular weight 4000, molecular weight distribution 1), 7g MDI, 39.2g DMF solvent, 0.1g stabilizer UV-329, and react at 75°C for 1 Hours, to obtain a prepolymer; add 1g mixed chain extender, 0.5g fast penetrating agent OT, 0.02g catalyst butyl tin mercaptide to the above prepolymer for reaction, then add 39.2g of DMF solvent, and react at 85°C for 5 hours , add 0.5g terminator propylene glycol methyl ether to terminate the reaction, finally add 0.48g filler sodium carboxymethylcellulose CMC, stir, filter and cool.

[0017] Wherein the mixed chain extender is 0.33g ethylene glycol, 0.33g 2-methyl-1,3-propanediol, 0.165g 1,3-butanediol, 0.165g 1,4-butanediol mixed and formed become.

[0018] The waterproof breathable resin product index prepared according to embodiment 1 is as follows:

[0019] Viscosity 180,000 cps / 25°C; solid content 30%; 100% modulus 3.3±0.5MPa; breaking strength ≥30 MPa; elongation ≥600%; peel str...

Embodiment 2

[0021] Mix 13g polyadipate-1,4-butylene glycol ester diol (molecular weight 4000, molecular weight distribution 1.5), 8g MDI, 30.32g DMF solvent, 0.2g stabilizer UV-329, and react at 75°C for 1.5 hours, to obtain a prepolymer; add 1.5g mixed chain extender, 0.47g fast penetrating agent OT, 0.03g catalyst butyltin mercaptide to the above prepolymer to react, then add 45.48g of DMF solvent, and react at 85°C for 6 Hours, add 0.6g terminator propylene glycol methyl ether to terminate the reaction, finally add 0.4g filler sodium carboxymethylcellulose CMC, stir, filter and cool.

[0022] The mixed chain extender is a mixture of 0.5g ethylene glycol, 0.5g 2-methyl-1,3-propanediol, 0.25g 1,3-butanediol, and 0.25g 1,4-butanediol .

Embodiment 3

[0024] Mix 15g polyadipate-1,4-butylene glycol ester diol (molecular weight 4500, molecular weight distribution 1.5), 9g MDI, 43.32g DMF solvent, 0.2g stabilizer UV-329, and react at 75℃ for 2 hours, to obtain a prepolymer; add 2g mixed chain extender, 0.5g fast penetrating agent OT, 0.04g catalyst butyl tin mercaptide to the above prepolymer for reaction, then add 28.88g of DMF solvent, and react at 85°C for 8 hours , Add 0.56g terminator propylene glycol methyl ether to terminate the reaction, and finally add 0.5g filler sodium carboxymethylcellulose CMC, stir, filter and cool.

[0025] The mixed chain extender is a mixture of 0.67g ethylene glycol, 0.67g 2-methyl-1,3-propanediol, 0.335g 1,3-butanediol, and 0.335g 1,4-butanediol .

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Abstract

The invention discloses a soft wet-method waterproof air-permeable water-permeable polyurethane resin and a preparation method thereof. The resin comprises the following components in percentage by mass: 12% to 15% of poly adipic acid-1, 4-butanediol ester glycol, 7% to 9% of diphenyl-methane-diisocyanate MDI, 1% to 2% of a mixing chain extendor, 0.5% to 0.6% of a terminating agent, 0.3% to 0.5% of a high-speed penetrating agent OT, 0.02% to 0.04% of a catalyst, 0.3% to 0.5% of filling material, 0.1% to 0.2% of a stabilizer UV-329, and the balance of an organic solvent. As the polyurethane resin and the preparation method thereof adopt the mixing chain extendor, and measures such as adding an organic solvent DMF and the filling material CMC twice, the prepared polyurethane resin has excellent waterproof moisture permeable properties ( water-fast pressure larger than and equal to 3000 mm H2O, and moisture permeable property larger than and equal to 5000 g / m 2.24 Hr), and is good in rebound resilience and peel strength, high in water-fast pressure, and soft, plump, and fine and smooth in handfeel.

Description

technical field [0001] The invention relates to a soft wet-process waterproof, breathable and moisture-permeable polyurethane resin and a preparation method thereof, belonging to the field of polyurethane preparation. Background technique [0002] With the improvement of people's living standards, more and more attention has been paid to functional clothing fabrics, including waterproof and breathable, breathable heat dissipation, warmth and cold protection, moisture absorption and perspiration, wear resistance and tear resistance, antistatic and radiation protection Antibacterial, anti-odor, anti-mosquito, etc. Among them, waterproof and breathable fabric means that when the fabric is worn, water does not penetrate the fabric under a certain pressure, but the sweat emitted by the human body can be conducted to the outside world through the fabric in the form of water vapor, keeping the wearer dry and comfortable. [0003] People use technologies such as lamination, coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G18/10C08L1/26
CPCC08G18/10C08G18/4238C08G18/7671C08G2101/00C08J9/26C08J2201/0464C08J2375/06C08G18/3206
Inventor 林泽兵李向明
Owner 江西巨联新材料有限公司
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