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Waterproof moisture-permeable waterborne polyurethane fabric coating material and preparation method thereof

A water-based polyurethane, waterproof and moisture-permeable technology, applied in the field of preparation of waterproof and moisture-permeable fabric coating agents, can solve problems such as unsatisfactory improvement in mechanical properties, and achieve improved moisture permeability and mechanical properties, improved waterproof performance, and improved operation simple effect

Inactive Publication Date: 2015-06-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are existing patents to explore the mechanical properties of water-based polyurethane materials by optimizing the synthesis process and raw material formula, the improvement of the mechanical properties is not satisfactory

Method used

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  • Waterproof moisture-permeable waterborne polyurethane fabric coating material and preparation method thereof
  • Waterproof moisture-permeable waterborne polyurethane fabric coating material and preparation method thereof
  • Waterproof moisture-permeable waterborne polyurethane fabric coating material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Polymer diol: the molecular weight of polytetrahydrofuran ether (PTMG) and polyethylene adipate glycol (PEA) is 1000, the total mass of mixed polymer diol is 114.2g, and the content of polyester diol is 0 respectively %, 20%, 40%, 60%, 80%, 100%;

[0024] 2. Diisocyanate: 70.0g of isophorone diisocyanate;

[0025] 3. Hydrophilic monomer: dimethylol butyric acid 10.8g;

[0026] 4. Small molecule diol: 4.9g of 1,4-butanediol;

[0027] 5. Chain extender: ethylenediamine 2.6g;

[0028] 6. Neutralizer: 7.4g of triethylamine;

[0029] 7. Solvent: butanone 120.0g (for adjusting the viscosity of the reaction system); deionized water 466.7g (for adjusting the solid content of the product).

[0030] The concrete steps of synthetic method are:

[0031] Room temperature, N 2 Under the atmosphere, put the polymer diol into the reaction kettle, raise the temperature to 105°C, vacuum dehydrate for 3 hours, then cool down to 40°C, add diisocyanate, dimethylol butyric acid, 1,4...

Embodiment 2

[0035] 1. Polymer diol: polytetrahydrofuran ether, polybutylene adipate (PBA) with a molecular weight of 1000,

[0036] The total mass of mixed polymer diol is 117.4g, and the contents of polyester diol are 0%, 20%, 40%, respectively.

[0037] 60%, 80%, 100%;

[0038] 2. Diisocyanate: 70.0g of isophorone diisocyanate;

[0039] 3. Hydrophilic monomer: dimethylol butyric acid 10.8g;

[0040] 4. Small molecule diol: 1.8g of 1,4-butanediol;

[0041] 5. Chain extender: ethylenediamine 3.8g;

[0042] 6. Neutralizer: 7.4g of triethylamine;

[0043] 7. Solvent: butanone 120.0g (for adjusting the viscosity of the reaction system); deionized water 466.7g (for adjusting the solid content of the product).

[0044] The concrete steps of synthetic method are:

[0045] Room temperature, N 2 Under the atmosphere, put the polymer diol into the reaction kettle, raise the temperature to 110°C, vacuum dehydrate for 3 hours, then cool down to 45°C, add diisocyanate, dimethylol butyric acid,...

Embodiment 3

[0049] 1. Polymer diol: the molecular weight of polytetrahydrofuran ether, polyethylene adipate glycol, polybutylene adipate, polyhexamethylene adipate (PHA) is 1000, and the mixed polymer diol The total mass is 117.4g, and the mass ratio of polyether to polyester diol is 1:4;

[0050] 2. Diisocyanate: 70.0g of isophorone diisocyanate;

[0051] 3. Hydrophilic monomer: dimethylol butyric acid 10.8g;

[0052] 4. Small molecule diol: 5.8g of 1,4-butanediol;

[0053] 5. Chain extender: ethylenediamine 4.3g;

[0054] 6. Neutralizer: 7.4g of triethylamine;

[0055] 7. Solvent: butanone 120.0g (for adjusting the viscosity of the reaction system); deionized water 466.7g (for adjusting the solid content of the product).

[0056] The concrete steps of synthetic method are:

[0057] Room temperature, N 2 Under the atmosphere, put the polymer diol into the reaction kettle, raise the temperature to 115°C, vacuum dehydrate for 3h, then cool down to 50°C, add diisocyanate, dimethylol b...

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Abstract

The invention discloses a waterproof moisture-permeable waterborne polyurethane fabric coating material with an excellent mechanical performance and a preparation method thereof. The material is obtained by emulsifying a waterborne polyurethane prepolymer butanone mixture which is formed in a manner than alkali is neutralized by an ethylenediamine aqueous solution, carrying out chain extension, defoaming and removing butanone by evaporation. The waterborne polyurethane prepolymer is prepared from the following components in percentage by mass according to the total mass of the waterborne polyurethane prepolymer: 30-40wt% of a diisocyanate, 50-60% of a polymer-dihydric alcohol, 3.8-5.8% of a hydrophilic chain extender-2,2-dimethylolbutanoic acid, 0.5-6.0% of micromolecule dihydric alcohol and 0.01-0.03% of an organic metal tin catalyst. The molecule structure and the micro-phase separation degree of a soft segment and a hard segment of the coating material are optimized; the water vapor transmission rate and the water pressure resistance of a fabric after coating meet the coating finishing requirement of a Dacron fabric on the market; the mechanical performance is excellent, wherein the tensile strength exceeds 800Kg / cm<2>, and the elongation at break is greater than 1700%.

Description

technical field [0001] The invention relates to a waterproof and moisture-permeable water-based polyurethane fabric coating material with excellent mechanical properties and a preparation method thereof, especially by adjusting the type and proportion of raw materials, exploring the optimal microphase separation degree of soft segments and hard segments, and preparing excellent mechanical properties A water-based polyurethane fabric coating material for the preparation of a waterproof and moisture-permeable fabric coating agent. Background technique [0002] At present, polyurethane is still mainly solvent-based in coatings, adhesives, and synthetic leather raw material solutions. Organic solvents have a strong smell, are flammable, explosive, and volatile. When used, they will cause air pollution and endanger human health. Water-based polyurethane is a binary colloid system with water as the dispersion medium. In addition to the excellent performance of solvent-based polyu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/572D06M15/647C08G18/66C08G18/48C08G18/42C08G18/34C08G18/32C08G18/12C08G18/08D06M101/32
Inventor 周钰明王海云何曼戴淄岳吕华波江平
Owner SOUTHEAST UNIV
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