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Reactive moisture-curable polyurethane hot melt adhesive and preparation method thereof

A polyurethane hot-melt adhesive and moisture-curing technology, applied in the field of polymer chemistry, can solve the problems of high polyether content, unfavorable bonding performance, and insufficient moisture permeability.

Active Publication Date: 2020-09-22
WANHUA CHEM BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this preparation method is that the introduced polyoxyethylene ether and aromatic polyester polyol are not conducive to the washing resistance of textile fabrics
[0005] Chinese patent document CN102167794A discloses a preparation method of polyurethane prepolymer: polytetramethylene glycol-ethylene glycol or polypropylene glycol is used for more than 75% of polyols, the Although the prepolymer prepared by the method has excellent moisture permeability and water washing resistance, it is not conducive to the bonding performance of the final product due to the high polyether content
The hot melt adhesive prepared by this method has good washing resistance, but due to the low content of ethylene oxide, the moisture permeability is not good enough, and at the same time, due to the use of low molecular weight polyols, the fabric is not soft.

Method used

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  • Reactive moisture-curable polyurethane hot melt adhesive and preparation method thereof
  • Reactive moisture-curable polyurethane hot melt adhesive and preparation method thereof
  • Reactive moisture-curable polyurethane hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4 and comparative example 1

[0076] The ratio of raw materials of Examples 1-4 and Comparative Example 1 is shown in Table 1.

[0077] The raw material of table 1 embodiment 1-4 and comparative example 1 and its mass proportioning

[0078] Raw materials (parts by mass) Example 1 Example 2 Example 3 Example 4 Comparative example 1 Isocyanate 1A 24 20 20 27 28 Polyether polyol 2A 25 Polyether polyol 2B 38 18 43 41 Polyether polyol 2C 38 Polyether polyol 2D 3 9 4 Polyester polyol 3A 2 Polyester polyol 3B 20 Polyester polyol 3C 20 20 12 Polyester polyol 3D 11.8 10 Polyester polyol 3E 14.5 14.5 10 Polyester polyol 3F 20 Compound 4A containing long chain aliphatic hydrocarbon 0.5 0.4 0.5 Compound 4B containing long chain aliphatic hydrocarbon 5 Hydroxyalkyl modified silicone oil 5A 0.2 0.1 0.5 NCO(wt%) 2.91 2.74...

experiment example

[0082] The reactive moisture-curing polyurethane hot-melt adhesive PUR sample prepared by Examples 1-4 and Comparative Example 1, the commercially available product PU-1 of Comparative Example 2 were used respectively to attach cloth and TPU film, wherein the cloth was a grade 5 waterproof fabric, The TPU film is a medium-permeable film (according to the ASTM E96BW standard, the moisture permeability is 8000), and the compounding is completed at a temperature of 23°C and a humidity of 50% and aged for 24 hours, and then the properties are tested according to the following methods.

[0083] Water pressure resistance test method: According to the ISO 811-2018 standard, the composite cloth film samples prepared above were respectively fixed on a standard instrument, and pressurized at a constant speed until 3 water drops appeared or the film was damaged, and the water pressure at this time was recorded. The water pressure is the water pressure resistance value of the sample (mmH ...

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Abstract

The invention belongs to the field of polymer chemistry, and particularly relates to a reactive moisture-curable polyurethane hot melt adhesive and a preparation method thereof. The hot melt adhesiveis prepared from an isocyanate component and an isocyanate reactive component in parts by mass through reaction, wherein the isocyanate component is prepared from the following components in parts bymass: 15-35 parts of isocyanate; wherein the isocyanate reactive component comprises the following components in parts by mass: 30-55 parts of at least one polyether polyol; 15 to 50 parts by mass ofat least one polyester polyol; 0.01-10 parts by mass of at least one other hydroxyl compound containing a long-chain aliphatic hydrocarbon; and 0-3 parts by mass of hydroxyalkyl modified silicone oil.The reactive moisture-curable polyurethane hot melt adhesive disclosed by the invention has excellent moisture permeability, bonding strength, washing resistance and soft hand feeling; the preparation method has the advantages of simple steps, effective control of the side reaction, and improvement of the quality and the production stability of the final product.

Description

technical field [0001] The invention belongs to the field of polymer chemistry, and in particular relates to a reactive moisture-curing polyurethane hot-melt adhesive and a preparation method thereof. Background technique [0002] With the improvement of human living standards, people have higher and higher functional requirements for clothing, such as warmth, fashion, antibacterial, waterproof, moisture permeability, windproof, etc. Fabrics with waterproof and moisture-permeable functions can reduce the feeling of stuffiness during exercise, so they are widely used in sportswear, mountaineering clothing, medical clothing, waterproof cloth, assault clothing, ski clothing and other fields. [0003] Reactive moisture-curing polyurethane hot melt adhesive (PUR), as a kind of environmentally friendly adhesive, is currently widely used in various fabric composite fabrics. If general PUR products are used, the air and moisture permeability of composite fabrics will be greatly red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C08G18/48C08G18/61C08G18/42C08G18/40
CPCC09J175/04C08G18/4837C08G18/4833C08G18/4825C08G18/61C08G18/4238C08G18/4211C08G18/4018C08G2170/20
Inventor 孔春丽王晓星张磊叶桂香赵怡
Owner WANHUA CHEM BEIJING
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